Abstract

We experimentally demonstrate the integration of near-field optical tweezers with surface enhanced Raman scattering (SERS) spectroscopy by using the optical evanescent wave from a silicon nitride waveguide to trap single shell-isolated metallic nanoparticles (NPs) and simultaneously excite SERS signals of Raman reporter molecules adsorbed on the surface of the trapped metallic NPs. Both evanescent wave excited Stokes and anti-Stokes SERS spectra of waveguide trapped single silver (Ag) NPs were acquired, which were compared to their far-field SERS spectra. We investigated the trapping of bare and shell-isolated metallic NPs and determined that the addition of a shell to the metallic NPs minimized particle-induced laser damage to the waveguide, which allowed for the stable acquisition of the SERS spectra. This work realizes a new nanophotonic approach, which we refer to as near-field light scattering Raman (NLS-Raman), for simultaneous near-field optical trapping and SERS characterization of single metallic NPs.

© 2015 Optical Society of America

Full Article  |  PDF Article
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    [Crossref] [PubMed]
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    [Crossref]
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    [Crossref]
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  30. J. F. Li, Y. F. Huang, Y. Ding, Z. L. Yang, S. B. Li, X. S. Zhou, F. R. Fan, W. Zhang, Z. Y. Zhou, Y. Wu, B. Ren, Z. L. Wang, and Z. Q. Tian, “Shell-isolated nanoparticle-enhanced Raman spectroscopy,” Nature 464(7287), 392–395 (2010).
    [Crossref] [PubMed]
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    [Crossref] [PubMed]
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    [Crossref] [PubMed]

2014 (4)

M. D. Sonntag, E. A. Pozzi, N. Jiang, M. C. Hersam, and R. P. Van Duyne, “Recent advances in tip-enhanced Raman spectroscopy,” J. Phys. Chem. Lett. 5(18), 3125–3130 (2014).
[Crossref]

P. P. Patra, R. Chikkaraddy, R. P. N. Tripathi, A. Dasgupta, and G. V. P. Kumar, “Plasmofluidic single-molecule surface-enhanced Raman scattering from dynamic assembly of plasmonic nanoparticles,” Nat. Commun. 5, 4357 (2014).
[Crossref] [PubMed]

A. Dhakal, A. Z. Subramanian, P. Wuytens, F. Peyskens, N. L. Thomas, and R. Baets, “Evanescent excitation and collection of spontaneous Raman spectra using silicon nitride nanophotonic waveguides,” Opt. Lett. 39(13), 4025–4028 (2014).
[Crossref] [PubMed]

H. Chen, F. Tian, J. Chi, J. Kanka, and H. Du, “Advantage of multi-mode sapphire optical fiber for evanescent-field SERS sensing,” Opt. Lett. 39(20), 5822–5825 (2014).
[Crossref] [PubMed]

2013 (4)

P. Løvhaugen, B. S. Ahluwalia, T. R. Huser, and O. G. Hellesø, “Serial Raman spectroscopy of particles trapped on a waveguide,” Opt. Express 21(3), 2964–2970 (2013).
[Crossref] [PubMed]

Y. Zhou, C. Lee, J. Zhang, and P. Zhang, “Engineering versatile SERS-active nanoparticles by embedding reporters between Au-core/Ag-shell through layer-by-layer deposited polyelectrolytes,” J. Mater. Chem. C 1(23), 3695–3699 (2013).
[Crossref]

N. Descharmes, U. P. Dharanipathy, Z. Diao, M. Tonin, and R. Houdré, “Single particle detection, manipulation and analysis with resonant optical trapping in photonic crystals,” Lab Chip 13(16), 3268–3274 (2013).
[Crossref] [PubMed]

J. W. Chan, “Recent advances in laser tweezers Raman spectroscopy (LTRS) for label-free analysis of single cells,” J Biophoton. 6(1), 36–48 (2013).
[Crossref] [PubMed]

2012 (1)

O. G. Hellesø, P. Løvhaugen, A. Z. Subramanian, J. S. Wilkinson, and B. S. Ahluwalia, “Surface transport and stable trapping of particles and cells by an optical waveguide loop,” Lab Chip 12(18), 3436–3440 (2012).
[Crossref] [PubMed]

2011 (4)

L. B. Kong, P. F. Zhang, G. W. Wang, J. Yu, P. Setlow, and Y. Q. Li, “Characterization of bacterial spore germination using phase-contrast and fluorescence microscopy, Raman spectroscopy and optical tweezers,” Nat. Protoc. 6(5), 625–639 (2011).
[Crossref] [PubMed]

D. Erickson, X. Serey, Y. F. Chen, and S. Mandal, “Nanomanipulation using near field photonics,” Lab Chip 11(6), 995–1009 (2011).
[Crossref] [PubMed]

M. L. Juan, M. Righini, and R. Quidant, “Plasmon nano-optical tweezers,” Nat. Photonics 5(6), 349–356 (2011).
[Crossref]

K. Wang, E. Schonbrun, P. Steinvurzel, and K. B. Crozier, “Trapping and rotating nanoparticles using a plasmonic nano-tweezer with an integrated heat sink,” Nat. Commun. 2, 469 (2011).
[Crossref] [PubMed]

2010 (3)

D. P. Cherney and J. M. Harris, “Confocal Raman microscopy of optical-trapped particles in liquids,” Ann. Rev Anal. Chem. 3(1), 277–297 (2010).
[Crossref] [PubMed]

S. Mandal, X. Serey, and D. Erickson, “Nanomanipulation using silicon photonic crystal resonators,” Nano Lett. 10(1), 99–104 (2010).
[Crossref] [PubMed]

J. F. Li, Y. F. Huang, Y. Ding, Z. L. Yang, S. B. Li, X. S. Zhou, F. R. Fan, W. Zhang, Z. Y. Zhou, Y. Wu, B. Ren, Z. L. Wang, and Z. Q. Tian, “Shell-isolated nanoparticle-enhanced Raman spectroscopy,” Nature 464(7287), 392–395 (2010).
[Crossref] [PubMed]

2009 (3)

L. Su, T. H. Lee, and S. R. Elliott, “Evanescent-wave excitation of surface-enhanced Raman scattering substrates by an optical-fiber taper,” Opt. Lett. 34(17), 2685–2687 (2009).
[Crossref] [PubMed]

D. Néel, S. Gétin, P. Ferret, M. Rosina, J. M. Fedeli, and O. G. Hellesø, “Optical transport of semiconductor nanowires on silicon nitride waveguides,” Appl. Phys. Lett. 94(25), 253115 (2009).
[Crossref]

A. H. Yang, S. D. Moore, B. S. Schmidt, M. Klug, M. Lipson, and D. Erickson, “Optical manipulation of nanoparticles and biomolecules in sub-wavelength slot waveguides,” Nature 457(7225), 71–75 (2009).
[Crossref] [PubMed]

2008 (2)

A. N. Grigorenko, N. W. Roberts, M. R. Dickinson, and Y. Zhang, “Nanometric optical tweezers based on nanostructured substrates,” Nat. Photonics 2(6), 365–370 (2008).
[Crossref]

J. W. Chan, D. S. Taylor, S. M. Lane, T. Zwerdling, J. Tuscano, and T. Huser, “Nondestructive identification of individual leukemia cells by laser trapping Raman spectroscopy,” Anal. Chem. 80(6), 2180–2187 (2008).
[Crossref] [PubMed]

2007 (3)

2006 (2)

G. Volpe, R. Quidant, G. Badenes, and D. Petrov, “Surface plasmon radiation forces,” Phys. Rev. Lett. 96(23), 238101 (2006).
[Crossref] [PubMed]

D. Chen, S. S. Huang, and Y. Q. Li, “Real-time detection of kinetic germination and heterogeneity of single Bacillus spores by laser tweezers Raman spectroscopy,” Anal. Chem. 78(19), 6936–6941 (2006).
[Crossref] [PubMed]

2004 (1)

R. Geßner, C. Winter, P. Rösch, M. Schmitt, R. Petry, W. Kiefer, M. Lankers, and J. Popp, “Identification of biotic and abiotic particles by using a combination of optical tweezers and in situ Raman spectroscopy,” ChemPhysChem 5(8), 1159–1170 (2004).
[Crossref] [PubMed]

2002 (1)

1996 (1)

1986 (1)

1984 (1)

1951 (1)

J. Turkevich, P. C. Stevenson, and J. Hillier, “A study of the nucleation and growth processes in the synthesis of colloidal gold,” Discuss. Faraday Soc. 11, 55–75 (1951).
[Crossref]

Ahluwalia, B. S.

P. Løvhaugen, B. S. Ahluwalia, T. R. Huser, and O. G. Hellesø, “Serial Raman spectroscopy of particles trapped on a waveguide,” Opt. Express 21(3), 2964–2970 (2013).
[Crossref] [PubMed]

O. G. Hellesø, P. Løvhaugen, A. Z. Subramanian, J. S. Wilkinson, and B. S. Ahluwalia, “Surface transport and stable trapping of particles and cells by an optical waveguide loop,” Lab Chip 12(18), 3436–3440 (2012).
[Crossref] [PubMed]

Ashkin, A.

Badenes, G.

G. Volpe, R. Quidant, G. Badenes, and D. Petrov, “Surface plasmon radiation forces,” Phys. Rev. Lett. 96(23), 238101 (2006).
[Crossref] [PubMed]

Baets, R.

Bjorkholm, J. E.

Chan, J. W.

J. W. Chan, “Recent advances in laser tweezers Raman spectroscopy (LTRS) for label-free analysis of single cells,” J Biophoton. 6(1), 36–48 (2013).
[Crossref] [PubMed]

J. W. Chan, D. S. Taylor, S. M. Lane, T. Zwerdling, J. Tuscano, and T. Huser, “Nondestructive identification of individual leukemia cells by laser trapping Raman spectroscopy,” Anal. Chem. 80(6), 2180–2187 (2008).
[Crossref] [PubMed]

Chen, D.

D. Chen, S. S. Huang, and Y. Q. Li, “Real-time detection of kinetic germination and heterogeneity of single Bacillus spores by laser tweezers Raman spectroscopy,” Anal. Chem. 78(19), 6936–6941 (2006).
[Crossref] [PubMed]

Chen, H.

Chen, Y. F.

D. Erickson, X. Serey, Y. F. Chen, and S. Mandal, “Nanomanipulation using near field photonics,” Lab Chip 11(6), 995–1009 (2011).
[Crossref] [PubMed]

Cherney, D. P.

D. P. Cherney and J. M. Harris, “Confocal Raman microscopy of optical-trapped particles in liquids,” Ann. Rev Anal. Chem. 3(1), 277–297 (2010).
[Crossref] [PubMed]

Chi, J.

Chikkaraddy, R.

P. P. Patra, R. Chikkaraddy, R. P. N. Tripathi, A. Dasgupta, and G. V. P. Kumar, “Plasmofluidic single-molecule surface-enhanced Raman scattering from dynamic assembly of plasmonic nanoparticles,” Nat. Commun. 5, 4357 (2014).
[Crossref] [PubMed]

Chu, S.

Crozier, K. B.

K. Wang, E. Schonbrun, P. Steinvurzel, and K. B. Crozier, “Trapping and rotating nanoparticles using a plasmonic nano-tweezer with an integrated heat sink,” Nat. Commun. 2, 469 (2011).
[Crossref] [PubMed]

Dasgupta, A.

P. P. Patra, R. Chikkaraddy, R. P. N. Tripathi, A. Dasgupta, and G. V. P. Kumar, “Plasmofluidic single-molecule surface-enhanced Raman scattering from dynamic assembly of plasmonic nanoparticles,” Nat. Commun. 5, 4357 (2014).
[Crossref] [PubMed]

Descharmes, N.

N. Descharmes, U. P. Dharanipathy, Z. Diao, M. Tonin, and R. Houdré, “Single particle detection, manipulation and analysis with resonant optical trapping in photonic crystals,” Lab Chip 13(16), 3268–3274 (2013).
[Crossref] [PubMed]

Dhakal, A.

Dharanipathy, U. P.

N. Descharmes, U. P. Dharanipathy, Z. Diao, M. Tonin, and R. Houdré, “Single particle detection, manipulation and analysis with resonant optical trapping in photonic crystals,” Lab Chip 13(16), 3268–3274 (2013).
[Crossref] [PubMed]

Diao, Z.

N. Descharmes, U. P. Dharanipathy, Z. Diao, M. Tonin, and R. Houdré, “Single particle detection, manipulation and analysis with resonant optical trapping in photonic crystals,” Lab Chip 13(16), 3268–3274 (2013).
[Crossref] [PubMed]

Dickinson, M. R.

A. N. Grigorenko, N. W. Roberts, M. R. Dickinson, and Y. Zhang, “Nanometric optical tweezers based on nanostructured substrates,” Nat. Photonics 2(6), 365–370 (2008).
[Crossref]

Ding, Y.

J. F. Li, Y. F. Huang, Y. Ding, Z. L. Yang, S. B. Li, X. S. Zhou, F. R. Fan, W. Zhang, Z. Y. Zhou, Y. Wu, B. Ren, Z. L. Wang, and Z. Q. Tian, “Shell-isolated nanoparticle-enhanced Raman spectroscopy,” Nature 464(7287), 392–395 (2010).
[Crossref] [PubMed]

Dinno, M. A.

Du, H.

Dziedzic, J. M.

Elliott, S. R.

Erickson, D.

D. Erickson, X. Serey, Y. F. Chen, and S. Mandal, “Nanomanipulation using near field photonics,” Lab Chip 11(6), 995–1009 (2011).
[Crossref] [PubMed]

S. Mandal, X. Serey, and D. Erickson, “Nanomanipulation using silicon photonic crystal resonators,” Nano Lett. 10(1), 99–104 (2010).
[Crossref] [PubMed]

A. H. Yang, S. D. Moore, B. S. Schmidt, M. Klug, M. Lipson, and D. Erickson, “Optical manipulation of nanoparticles and biomolecules in sub-wavelength slot waveguides,” Nature 457(7225), 71–75 (2009).
[Crossref] [PubMed]

B. S. Schmidt, A. H. Yang, D. Erickson, and M. Lipson, “Optofluidic trapping and transport on solid core waveguides within a microfluidic device,” Opt. Express 15(22), 14322–14334 (2007).
[Crossref] [PubMed]

Esen, C.

Fan, F. R.

J. F. Li, Y. F. Huang, Y. Ding, Z. L. Yang, S. B. Li, X. S. Zhou, F. R. Fan, W. Zhang, Z. Y. Zhou, Y. Wu, B. Ren, Z. L. Wang, and Z. Q. Tian, “Shell-isolated nanoparticle-enhanced Raman spectroscopy,” Nature 464(7287), 392–395 (2010).
[Crossref] [PubMed]

Fedeli, J. M.

D. Néel, S. Gétin, P. Ferret, M. Rosina, J. M. Fedeli, and O. G. Hellesø, “Optical transport of semiconductor nanowires on silicon nitride waveguides,” Appl. Phys. Lett. 94(25), 253115 (2009).
[Crossref]

Ferret, P.

D. Néel, S. Gétin, P. Ferret, M. Rosina, J. M. Fedeli, and O. G. Hellesø, “Optical transport of semiconductor nanowires on silicon nitride waveguides,” Appl. Phys. Lett. 94(25), 253115 (2009).
[Crossref]

Geßner, R.

R. Geßner, C. Winter, P. Rösch, M. Schmitt, R. Petry, W. Kiefer, M. Lankers, and J. Popp, “Identification of biotic and abiotic particles by using a combination of optical tweezers and in situ Raman spectroscopy,” ChemPhysChem 5(8), 1159–1170 (2004).
[Crossref] [PubMed]

Gétin, S.

D. Néel, S. Gétin, P. Ferret, M. Rosina, J. M. Fedeli, and O. G. Hellesø, “Optical transport of semiconductor nanowires on silicon nitride waveguides,” Appl. Phys. Lett. 94(25), 253115 (2009).
[Crossref]

Grigorenko, A. N.

A. N. Grigorenko, N. W. Roberts, M. R. Dickinson, and Y. Zhang, “Nanometric optical tweezers based on nanostructured substrates,” Nat. Photonics 2(6), 365–370 (2008).
[Crossref]

Grujic, K.

Harris, J. M.

D. P. Cherney and J. M. Harris, “Confocal Raman microscopy of optical-trapped particles in liquids,” Ann. Rev Anal. Chem. 3(1), 277–297 (2010).
[Crossref] [PubMed]

Hellesø, O. G.

P. Løvhaugen, B. S. Ahluwalia, T. R. Huser, and O. G. Hellesø, “Serial Raman spectroscopy of particles trapped on a waveguide,” Opt. Express 21(3), 2964–2970 (2013).
[Crossref] [PubMed]

O. G. Hellesø, P. Løvhaugen, A. Z. Subramanian, J. S. Wilkinson, and B. S. Ahluwalia, “Surface transport and stable trapping of particles and cells by an optical waveguide loop,” Lab Chip 12(18), 3436–3440 (2012).
[Crossref] [PubMed]

D. Néel, S. Gétin, P. Ferret, M. Rosina, J. M. Fedeli, and O. G. Hellesø, “Optical transport of semiconductor nanowires on silicon nitride waveguides,” Appl. Phys. Lett. 94(25), 253115 (2009).
[Crossref]

K. Grujic and O. G. Hellesø, “Dielectric microsphere manipulation and chain assembly by counter-propagating waves in a channel waveguide,” Opt. Express 15(10), 6470–6477 (2007).
[Crossref] [PubMed]

Hersam, M. C.

M. D. Sonntag, E. A. Pozzi, N. Jiang, M. C. Hersam, and R. P. Van Duyne, “Recent advances in tip-enhanced Raman spectroscopy,” J. Phys. Chem. Lett. 5(18), 3125–3130 (2014).
[Crossref]

Hillier, J.

J. Turkevich, P. C. Stevenson, and J. Hillier, “A study of the nucleation and growth processes in the synthesis of colloidal gold,” Discuss. Faraday Soc. 11, 55–75 (1951).
[Crossref]

Houdré, R.

N. Descharmes, U. P. Dharanipathy, Z. Diao, M. Tonin, and R. Houdré, “Single particle detection, manipulation and analysis with resonant optical trapping in photonic crystals,” Lab Chip 13(16), 3268–3274 (2013).
[Crossref] [PubMed]

Huang, S. S.

D. Chen, S. S. Huang, and Y. Q. Li, “Real-time detection of kinetic germination and heterogeneity of single Bacillus spores by laser tweezers Raman spectroscopy,” Anal. Chem. 78(19), 6936–6941 (2006).
[Crossref] [PubMed]

Huang, Y. F.

J. F. Li, Y. F. Huang, Y. Ding, Z. L. Yang, S. B. Li, X. S. Zhou, F. R. Fan, W. Zhang, Z. Y. Zhou, Y. Wu, B. Ren, Z. L. Wang, and Z. Q. Tian, “Shell-isolated nanoparticle-enhanced Raman spectroscopy,” Nature 464(7287), 392–395 (2010).
[Crossref] [PubMed]

Huser, T.

J. W. Chan, D. S. Taylor, S. M. Lane, T. Zwerdling, J. Tuscano, and T. Huser, “Nondestructive identification of individual leukemia cells by laser trapping Raman spectroscopy,” Anal. Chem. 80(6), 2180–2187 (2008).
[Crossref] [PubMed]

Huser, T. R.

Jiang, N.

M. D. Sonntag, E. A. Pozzi, N. Jiang, M. C. Hersam, and R. P. Van Duyne, “Recent advances in tip-enhanced Raman spectroscopy,” J. Phys. Chem. Lett. 5(18), 3125–3130 (2014).
[Crossref]

Juan, M. L.

M. L. Juan, M. Righini, and R. Quidant, “Plasmon nano-optical tweezers,” Nat. Photonics 5(6), 349–356 (2011).
[Crossref]

Kaiser, T.

Kanka, J.

Kiefer, W.

R. Geßner, C. Winter, P. Rösch, M. Schmitt, R. Petry, W. Kiefer, M. Lankers, and J. Popp, “Identification of biotic and abiotic particles by using a combination of optical tweezers and in situ Raman spectroscopy,” ChemPhysChem 5(8), 1159–1170 (2004).
[Crossref] [PubMed]

R. Thurn and W. Kiefer, “Raman-microsampling technique applying optical levitation by radiation pressure,” Appl. Spectrosc. 38(1), 78–83 (1984).
[Crossref]

Klug, M.

A. H. Yang, S. D. Moore, B. S. Schmidt, M. Klug, M. Lipson, and D. Erickson, “Optical manipulation of nanoparticles and biomolecules in sub-wavelength slot waveguides,” Nature 457(7225), 71–75 (2009).
[Crossref] [PubMed]

Kong, L. B.

L. B. Kong, P. F. Zhang, G. W. Wang, J. Yu, P. Setlow, and Y. Q. Li, “Characterization of bacterial spore germination using phase-contrast and fluorescence microscopy, Raman spectroscopy and optical tweezers,” Nat. Protoc. 6(5), 625–639 (2011).
[Crossref] [PubMed]

Kumar, G. V. P.

P. P. Patra, R. Chikkaraddy, R. P. N. Tripathi, A. Dasgupta, and G. V. P. Kumar, “Plasmofluidic single-molecule surface-enhanced Raman scattering from dynamic assembly of plasmonic nanoparticles,” Nat. Commun. 5, 4357 (2014).
[Crossref] [PubMed]

Lane, S. M.

J. W. Chan, D. S. Taylor, S. M. Lane, T. Zwerdling, J. Tuscano, and T. Huser, “Nondestructive identification of individual leukemia cells by laser trapping Raman spectroscopy,” Anal. Chem. 80(6), 2180–2187 (2008).
[Crossref] [PubMed]

Lankers, M.

R. Geßner, C. Winter, P. Rösch, M. Schmitt, R. Petry, W. Kiefer, M. Lankers, and J. Popp, “Identification of biotic and abiotic particles by using a combination of optical tweezers and in situ Raman spectroscopy,” ChemPhysChem 5(8), 1159–1170 (2004).
[Crossref] [PubMed]

Lee, C.

Y. Zhou, C. Lee, J. Zhang, and P. Zhang, “Engineering versatile SERS-active nanoparticles by embedding reporters between Au-core/Ag-shell through layer-by-layer deposited polyelectrolytes,” J. Mater. Chem. C 1(23), 3695–3699 (2013).
[Crossref]

Lee, T. H.

Li, J. F.

J. F. Li, Y. F. Huang, Y. Ding, Z. L. Yang, S. B. Li, X. S. Zhou, F. R. Fan, W. Zhang, Z. Y. Zhou, Y. Wu, B. Ren, Z. L. Wang, and Z. Q. Tian, “Shell-isolated nanoparticle-enhanced Raman spectroscopy,” Nature 464(7287), 392–395 (2010).
[Crossref] [PubMed]

Li, S. B.

J. F. Li, Y. F. Huang, Y. Ding, Z. L. Yang, S. B. Li, X. S. Zhou, F. R. Fan, W. Zhang, Z. Y. Zhou, Y. Wu, B. Ren, Z. L. Wang, and Z. Q. Tian, “Shell-isolated nanoparticle-enhanced Raman spectroscopy,” Nature 464(7287), 392–395 (2010).
[Crossref] [PubMed]

Li, Y. Q.

L. B. Kong, P. F. Zhang, G. W. Wang, J. Yu, P. Setlow, and Y. Q. Li, “Characterization of bacterial spore germination using phase-contrast and fluorescence microscopy, Raman spectroscopy and optical tweezers,” Nat. Protoc. 6(5), 625–639 (2011).
[Crossref] [PubMed]

D. Chen, S. S. Huang, and Y. Q. Li, “Real-time detection of kinetic germination and heterogeneity of single Bacillus spores by laser tweezers Raman spectroscopy,” Anal. Chem. 78(19), 6936–6941 (2006).
[Crossref] [PubMed]

C. Xie, M. A. Dinno, and Y. Q. Li, “Near-infrared Raman spectroscopy of single optically trapped biological cells,” Opt. Lett. 27(4), 249–251 (2002).
[Crossref] [PubMed]

Lipson, M.

A. H. Yang, S. D. Moore, B. S. Schmidt, M. Klug, M. Lipson, and D. Erickson, “Optical manipulation of nanoparticles and biomolecules in sub-wavelength slot waveguides,” Nature 457(7225), 71–75 (2009).
[Crossref] [PubMed]

B. S. Schmidt, A. H. Yang, D. Erickson, and M. Lipson, “Optofluidic trapping and transport on solid core waveguides within a microfluidic device,” Opt. Express 15(22), 14322–14334 (2007).
[Crossref] [PubMed]

Løvhaugen, P.

P. Løvhaugen, B. S. Ahluwalia, T. R. Huser, and O. G. Hellesø, “Serial Raman spectroscopy of particles trapped on a waveguide,” Opt. Express 21(3), 2964–2970 (2013).
[Crossref] [PubMed]

O. G. Hellesø, P. Løvhaugen, A. Z. Subramanian, J. S. Wilkinson, and B. S. Ahluwalia, “Surface transport and stable trapping of particles and cells by an optical waveguide loop,” Lab Chip 12(18), 3436–3440 (2012).
[Crossref] [PubMed]

Mandal, S.

D. Erickson, X. Serey, Y. F. Chen, and S. Mandal, “Nanomanipulation using near field photonics,” Lab Chip 11(6), 995–1009 (2011).
[Crossref] [PubMed]

S. Mandal, X. Serey, and D. Erickson, “Nanomanipulation using silicon photonic crystal resonators,” Nano Lett. 10(1), 99–104 (2010).
[Crossref] [PubMed]

Moore, S. D.

A. H. Yang, S. D. Moore, B. S. Schmidt, M. Klug, M. Lipson, and D. Erickson, “Optical manipulation of nanoparticles and biomolecules in sub-wavelength slot waveguides,” Nature 457(7225), 71–75 (2009).
[Crossref] [PubMed]

Néel, D.

D. Néel, S. Gétin, P. Ferret, M. Rosina, J. M. Fedeli, and O. G. Hellesø, “Optical transport of semiconductor nanowires on silicon nitride waveguides,” Appl. Phys. Lett. 94(25), 253115 (2009).
[Crossref]

Patra, P. P.

P. P. Patra, R. Chikkaraddy, R. P. N. Tripathi, A. Dasgupta, and G. V. P. Kumar, “Plasmofluidic single-molecule surface-enhanced Raman scattering from dynamic assembly of plasmonic nanoparticles,” Nat. Commun. 5, 4357 (2014).
[Crossref] [PubMed]

Petrov, D.

G. Volpe, R. Quidant, G. Badenes, and D. Petrov, “Surface plasmon radiation forces,” Phys. Rev. Lett. 96(23), 238101 (2006).
[Crossref] [PubMed]

Petrov, D. V.

D. V. Petrov, “Raman spectroscopy of optically trapped particles,” J. Opt. A, Pure Appl. Opt. 9(8), S139–S156 (2007).
[Crossref]

Petry, R.

R. Geßner, C. Winter, P. Rösch, M. Schmitt, R. Petry, W. Kiefer, M. Lankers, and J. Popp, “Identification of biotic and abiotic particles by using a combination of optical tweezers and in situ Raman spectroscopy,” ChemPhysChem 5(8), 1159–1170 (2004).
[Crossref] [PubMed]

Peyskens, F.

Popp, J.

R. Geßner, C. Winter, P. Rösch, M. Schmitt, R. Petry, W. Kiefer, M. Lankers, and J. Popp, “Identification of biotic and abiotic particles by using a combination of optical tweezers and in situ Raman spectroscopy,” ChemPhysChem 5(8), 1159–1170 (2004).
[Crossref] [PubMed]

Pozzi, E. A.

M. D. Sonntag, E. A. Pozzi, N. Jiang, M. C. Hersam, and R. P. Van Duyne, “Recent advances in tip-enhanced Raman spectroscopy,” J. Phys. Chem. Lett. 5(18), 3125–3130 (2014).
[Crossref]

Quidant, R.

M. L. Juan, M. Righini, and R. Quidant, “Plasmon nano-optical tweezers,” Nat. Photonics 5(6), 349–356 (2011).
[Crossref]

G. Volpe, R. Quidant, G. Badenes, and D. Petrov, “Surface plasmon radiation forces,” Phys. Rev. Lett. 96(23), 238101 (2006).
[Crossref] [PubMed]

Ren, B.

J. F. Li, Y. F. Huang, Y. Ding, Z. L. Yang, S. B. Li, X. S. Zhou, F. R. Fan, W. Zhang, Z. Y. Zhou, Y. Wu, B. Ren, Z. L. Wang, and Z. Q. Tian, “Shell-isolated nanoparticle-enhanced Raman spectroscopy,” Nature 464(7287), 392–395 (2010).
[Crossref] [PubMed]

Righini, M.

M. L. Juan, M. Righini, and R. Quidant, “Plasmon nano-optical tweezers,” Nat. Photonics 5(6), 349–356 (2011).
[Crossref]

Roberts, N. W.

A. N. Grigorenko, N. W. Roberts, M. R. Dickinson, and Y. Zhang, “Nanometric optical tweezers based on nanostructured substrates,” Nat. Photonics 2(6), 365–370 (2008).
[Crossref]

Rösch, P.

R. Geßner, C. Winter, P. Rösch, M. Schmitt, R. Petry, W. Kiefer, M. Lankers, and J. Popp, “Identification of biotic and abiotic particles by using a combination of optical tweezers and in situ Raman spectroscopy,” ChemPhysChem 5(8), 1159–1170 (2004).
[Crossref] [PubMed]

Rosina, M.

D. Néel, S. Gétin, P. Ferret, M. Rosina, J. M. Fedeli, and O. G. Hellesø, “Optical transport of semiconductor nanowires on silicon nitride waveguides,” Appl. Phys. Lett. 94(25), 253115 (2009).
[Crossref]

Schmidt, B. S.

A. H. Yang, S. D. Moore, B. S. Schmidt, M. Klug, M. Lipson, and D. Erickson, “Optical manipulation of nanoparticles and biomolecules in sub-wavelength slot waveguides,” Nature 457(7225), 71–75 (2009).
[Crossref] [PubMed]

B. S. Schmidt, A. H. Yang, D. Erickson, and M. Lipson, “Optofluidic trapping and transport on solid core waveguides within a microfluidic device,” Opt. Express 15(22), 14322–14334 (2007).
[Crossref] [PubMed]

Schmitt, M.

R. Geßner, C. Winter, P. Rösch, M. Schmitt, R. Petry, W. Kiefer, M. Lankers, and J. Popp, “Identification of biotic and abiotic particles by using a combination of optical tweezers and in situ Raman spectroscopy,” ChemPhysChem 5(8), 1159–1170 (2004).
[Crossref] [PubMed]

Schonbrun, E.

K. Wang, E. Schonbrun, P. Steinvurzel, and K. B. Crozier, “Trapping and rotating nanoparticles using a plasmonic nano-tweezer with an integrated heat sink,” Nat. Commun. 2, 469 (2011).
[Crossref] [PubMed]

Schweiger, G.

Serey, X.

D. Erickson, X. Serey, Y. F. Chen, and S. Mandal, “Nanomanipulation using near field photonics,” Lab Chip 11(6), 995–1009 (2011).
[Crossref] [PubMed]

S. Mandal, X. Serey, and D. Erickson, “Nanomanipulation using silicon photonic crystal resonators,” Nano Lett. 10(1), 99–104 (2010).
[Crossref] [PubMed]

Setlow, P.

L. B. Kong, P. F. Zhang, G. W. Wang, J. Yu, P. Setlow, and Y. Q. Li, “Characterization of bacterial spore germination using phase-contrast and fluorescence microscopy, Raman spectroscopy and optical tweezers,” Nat. Protoc. 6(5), 625–639 (2011).
[Crossref] [PubMed]

Sonntag, M. D.

M. D. Sonntag, E. A. Pozzi, N. Jiang, M. C. Hersam, and R. P. Van Duyne, “Recent advances in tip-enhanced Raman spectroscopy,” J. Phys. Chem. Lett. 5(18), 3125–3130 (2014).
[Crossref]

Steinvurzel, P.

K. Wang, E. Schonbrun, P. Steinvurzel, and K. B. Crozier, “Trapping and rotating nanoparticles using a plasmonic nano-tweezer with an integrated heat sink,” Nat. Commun. 2, 469 (2011).
[Crossref] [PubMed]

Stevenson, P. C.

J. Turkevich, P. C. Stevenson, and J. Hillier, “A study of the nucleation and growth processes in the synthesis of colloidal gold,” Discuss. Faraday Soc. 11, 55–75 (1951).
[Crossref]

Su, L.

Subramanian, A. Z.

A. Dhakal, A. Z. Subramanian, P. Wuytens, F. Peyskens, N. L. Thomas, and R. Baets, “Evanescent excitation and collection of spontaneous Raman spectra using silicon nitride nanophotonic waveguides,” Opt. Lett. 39(13), 4025–4028 (2014).
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O. G. Hellesø, P. Løvhaugen, A. Z. Subramanian, J. S. Wilkinson, and B. S. Ahluwalia, “Surface transport and stable trapping of particles and cells by an optical waveguide loop,” Lab Chip 12(18), 3436–3440 (2012).
[Crossref] [PubMed]

Taylor, D. S.

J. W. Chan, D. S. Taylor, S. M. Lane, T. Zwerdling, J. Tuscano, and T. Huser, “Nondestructive identification of individual leukemia cells by laser trapping Raman spectroscopy,” Anal. Chem. 80(6), 2180–2187 (2008).
[Crossref] [PubMed]

Thomas, N. L.

Thurn, R.

Tian, F.

Tian, Z. Q.

J. F. Li, Y. F. Huang, Y. Ding, Z. L. Yang, S. B. Li, X. S. Zhou, F. R. Fan, W. Zhang, Z. Y. Zhou, Y. Wu, B. Ren, Z. L. Wang, and Z. Q. Tian, “Shell-isolated nanoparticle-enhanced Raman spectroscopy,” Nature 464(7287), 392–395 (2010).
[Crossref] [PubMed]

Tonin, M.

N. Descharmes, U. P. Dharanipathy, Z. Diao, M. Tonin, and R. Houdré, “Single particle detection, manipulation and analysis with resonant optical trapping in photonic crystals,” Lab Chip 13(16), 3268–3274 (2013).
[Crossref] [PubMed]

Tripathi, R. P. N.

P. P. Patra, R. Chikkaraddy, R. P. N. Tripathi, A. Dasgupta, and G. V. P. Kumar, “Plasmofluidic single-molecule surface-enhanced Raman scattering from dynamic assembly of plasmonic nanoparticles,” Nat. Commun. 5, 4357 (2014).
[Crossref] [PubMed]

Turkevich, J.

J. Turkevich, P. C. Stevenson, and J. Hillier, “A study of the nucleation and growth processes in the synthesis of colloidal gold,” Discuss. Faraday Soc. 11, 55–75 (1951).
[Crossref]

Tuscano, J.

J. W. Chan, D. S. Taylor, S. M. Lane, T. Zwerdling, J. Tuscano, and T. Huser, “Nondestructive identification of individual leukemia cells by laser trapping Raman spectroscopy,” Anal. Chem. 80(6), 2180–2187 (2008).
[Crossref] [PubMed]

Van Duyne, R. P.

M. D. Sonntag, E. A. Pozzi, N. Jiang, M. C. Hersam, and R. P. Van Duyne, “Recent advances in tip-enhanced Raman spectroscopy,” J. Phys. Chem. Lett. 5(18), 3125–3130 (2014).
[Crossref]

Volpe, G.

G. Volpe, R. Quidant, G. Badenes, and D. Petrov, “Surface plasmon radiation forces,” Phys. Rev. Lett. 96(23), 238101 (2006).
[Crossref] [PubMed]

Wang, G. W.

L. B. Kong, P. F. Zhang, G. W. Wang, J. Yu, P. Setlow, and Y. Q. Li, “Characterization of bacterial spore germination using phase-contrast and fluorescence microscopy, Raman spectroscopy and optical tweezers,” Nat. Protoc. 6(5), 625–639 (2011).
[Crossref] [PubMed]

Wang, K.

K. Wang, E. Schonbrun, P. Steinvurzel, and K. B. Crozier, “Trapping and rotating nanoparticles using a plasmonic nano-tweezer with an integrated heat sink,” Nat. Commun. 2, 469 (2011).
[Crossref] [PubMed]

Wang, Z. L.

J. F. Li, Y. F. Huang, Y. Ding, Z. L. Yang, S. B. Li, X. S. Zhou, F. R. Fan, W. Zhang, Z. Y. Zhou, Y. Wu, B. Ren, Z. L. Wang, and Z. Q. Tian, “Shell-isolated nanoparticle-enhanced Raman spectroscopy,” Nature 464(7287), 392–395 (2010).
[Crossref] [PubMed]

Wilkinson, J. S.

O. G. Hellesø, P. Løvhaugen, A. Z. Subramanian, J. S. Wilkinson, and B. S. Ahluwalia, “Surface transport and stable trapping of particles and cells by an optical waveguide loop,” Lab Chip 12(18), 3436–3440 (2012).
[Crossref] [PubMed]

Winter, C.

R. Geßner, C. Winter, P. Rösch, M. Schmitt, R. Petry, W. Kiefer, M. Lankers, and J. Popp, “Identification of biotic and abiotic particles by using a combination of optical tweezers and in situ Raman spectroscopy,” ChemPhysChem 5(8), 1159–1170 (2004).
[Crossref] [PubMed]

Wu, Y.

J. F. Li, Y. F. Huang, Y. Ding, Z. L. Yang, S. B. Li, X. S. Zhou, F. R. Fan, W. Zhang, Z. Y. Zhou, Y. Wu, B. Ren, Z. L. Wang, and Z. Q. Tian, “Shell-isolated nanoparticle-enhanced Raman spectroscopy,” Nature 464(7287), 392–395 (2010).
[Crossref] [PubMed]

Wuytens, P.

Xie, C.

Yang, A. H.

A. H. Yang, S. D. Moore, B. S. Schmidt, M. Klug, M. Lipson, and D. Erickson, “Optical manipulation of nanoparticles and biomolecules in sub-wavelength slot waveguides,” Nature 457(7225), 71–75 (2009).
[Crossref] [PubMed]

B. S. Schmidt, A. H. Yang, D. Erickson, and M. Lipson, “Optofluidic trapping and transport on solid core waveguides within a microfluidic device,” Opt. Express 15(22), 14322–14334 (2007).
[Crossref] [PubMed]

Yang, Z. L.

J. F. Li, Y. F. Huang, Y. Ding, Z. L. Yang, S. B. Li, X. S. Zhou, F. R. Fan, W. Zhang, Z. Y. Zhou, Y. Wu, B. Ren, Z. L. Wang, and Z. Q. Tian, “Shell-isolated nanoparticle-enhanced Raman spectroscopy,” Nature 464(7287), 392–395 (2010).
[Crossref] [PubMed]

Yu, J.

L. B. Kong, P. F. Zhang, G. W. Wang, J. Yu, P. Setlow, and Y. Q. Li, “Characterization of bacterial spore germination using phase-contrast and fluorescence microscopy, Raman spectroscopy and optical tweezers,” Nat. Protoc. 6(5), 625–639 (2011).
[Crossref] [PubMed]

Zhang, J.

Y. Zhou, C. Lee, J. Zhang, and P. Zhang, “Engineering versatile SERS-active nanoparticles by embedding reporters between Au-core/Ag-shell through layer-by-layer deposited polyelectrolytes,” J. Mater. Chem. C 1(23), 3695–3699 (2013).
[Crossref]

Zhang, P.

Y. Zhou, C. Lee, J. Zhang, and P. Zhang, “Engineering versatile SERS-active nanoparticles by embedding reporters between Au-core/Ag-shell through layer-by-layer deposited polyelectrolytes,” J. Mater. Chem. C 1(23), 3695–3699 (2013).
[Crossref]

Zhang, P. F.

L. B. Kong, P. F. Zhang, G. W. Wang, J. Yu, P. Setlow, and Y. Q. Li, “Characterization of bacterial spore germination using phase-contrast and fluorescence microscopy, Raman spectroscopy and optical tweezers,” Nat. Protoc. 6(5), 625–639 (2011).
[Crossref] [PubMed]

Zhang, W.

J. F. Li, Y. F. Huang, Y. Ding, Z. L. Yang, S. B. Li, X. S. Zhou, F. R. Fan, W. Zhang, Z. Y. Zhou, Y. Wu, B. Ren, Z. L. Wang, and Z. Q. Tian, “Shell-isolated nanoparticle-enhanced Raman spectroscopy,” Nature 464(7287), 392–395 (2010).
[Crossref] [PubMed]

Zhang, Y.

A. N. Grigorenko, N. W. Roberts, M. R. Dickinson, and Y. Zhang, “Nanometric optical tweezers based on nanostructured substrates,” Nat. Photonics 2(6), 365–370 (2008).
[Crossref]

Zhou, X. S.

J. F. Li, Y. F. Huang, Y. Ding, Z. L. Yang, S. B. Li, X. S. Zhou, F. R. Fan, W. Zhang, Z. Y. Zhou, Y. Wu, B. Ren, Z. L. Wang, and Z. Q. Tian, “Shell-isolated nanoparticle-enhanced Raman spectroscopy,” Nature 464(7287), 392–395 (2010).
[Crossref] [PubMed]

Zhou, Y.

Y. Zhou, C. Lee, J. Zhang, and P. Zhang, “Engineering versatile SERS-active nanoparticles by embedding reporters between Au-core/Ag-shell through layer-by-layer deposited polyelectrolytes,” J. Mater. Chem. C 1(23), 3695–3699 (2013).
[Crossref]

Zhou, Z. Y.

J. F. Li, Y. F. Huang, Y. Ding, Z. L. Yang, S. B. Li, X. S. Zhou, F. R. Fan, W. Zhang, Z. Y. Zhou, Y. Wu, B. Ren, Z. L. Wang, and Z. Q. Tian, “Shell-isolated nanoparticle-enhanced Raman spectroscopy,” Nature 464(7287), 392–395 (2010).
[Crossref] [PubMed]

Zwerdling, T.

J. W. Chan, D. S. Taylor, S. M. Lane, T. Zwerdling, J. Tuscano, and T. Huser, “Nondestructive identification of individual leukemia cells by laser trapping Raman spectroscopy,” Anal. Chem. 80(6), 2180–2187 (2008).
[Crossref] [PubMed]

Anal. Chem. (2)

J. W. Chan, D. S. Taylor, S. M. Lane, T. Zwerdling, J. Tuscano, and T. Huser, “Nondestructive identification of individual leukemia cells by laser trapping Raman spectroscopy,” Anal. Chem. 80(6), 2180–2187 (2008).
[Crossref] [PubMed]

D. Chen, S. S. Huang, and Y. Q. Li, “Real-time detection of kinetic germination and heterogeneity of single Bacillus spores by laser tweezers Raman spectroscopy,” Anal. Chem. 78(19), 6936–6941 (2006).
[Crossref] [PubMed]

Ann. Rev Anal. Chem. (1)

D. P. Cherney and J. M. Harris, “Confocal Raman microscopy of optical-trapped particles in liquids,” Ann. Rev Anal. Chem. 3(1), 277–297 (2010).
[Crossref] [PubMed]

Appl. Phys. Lett. (1)

D. Néel, S. Gétin, P. Ferret, M. Rosina, J. M. Fedeli, and O. G. Hellesø, “Optical transport of semiconductor nanowires on silicon nitride waveguides,” Appl. Phys. Lett. 94(25), 253115 (2009).
[Crossref]

Appl. Spectrosc. (2)

ChemPhysChem (1)

R. Geßner, C. Winter, P. Rösch, M. Schmitt, R. Petry, W. Kiefer, M. Lankers, and J. Popp, “Identification of biotic and abiotic particles by using a combination of optical tweezers and in situ Raman spectroscopy,” ChemPhysChem 5(8), 1159–1170 (2004).
[Crossref] [PubMed]

Discuss. Faraday Soc. (1)

J. Turkevich, P. C. Stevenson, and J. Hillier, “A study of the nucleation and growth processes in the synthesis of colloidal gold,” Discuss. Faraday Soc. 11, 55–75 (1951).
[Crossref]

J Biophoton. (1)

J. W. Chan, “Recent advances in laser tweezers Raman spectroscopy (LTRS) for label-free analysis of single cells,” J Biophoton. 6(1), 36–48 (2013).
[Crossref] [PubMed]

J. Mater. Chem. C (1)

Y. Zhou, C. Lee, J. Zhang, and P. Zhang, “Engineering versatile SERS-active nanoparticles by embedding reporters between Au-core/Ag-shell through layer-by-layer deposited polyelectrolytes,” J. Mater. Chem. C 1(23), 3695–3699 (2013).
[Crossref]

J. Opt. A, Pure Appl. Opt. (1)

D. V. Petrov, “Raman spectroscopy of optically trapped particles,” J. Opt. A, Pure Appl. Opt. 9(8), S139–S156 (2007).
[Crossref]

J. Phys. Chem. Lett. (1)

M. D. Sonntag, E. A. Pozzi, N. Jiang, M. C. Hersam, and R. P. Van Duyne, “Recent advances in tip-enhanced Raman spectroscopy,” J. Phys. Chem. Lett. 5(18), 3125–3130 (2014).
[Crossref]

Lab Chip (3)

N. Descharmes, U. P. Dharanipathy, Z. Diao, M. Tonin, and R. Houdré, “Single particle detection, manipulation and analysis with resonant optical trapping in photonic crystals,” Lab Chip 13(16), 3268–3274 (2013).
[Crossref] [PubMed]

O. G. Hellesø, P. Løvhaugen, A. Z. Subramanian, J. S. Wilkinson, and B. S. Ahluwalia, “Surface transport and stable trapping of particles and cells by an optical waveguide loop,” Lab Chip 12(18), 3436–3440 (2012).
[Crossref] [PubMed]

D. Erickson, X. Serey, Y. F. Chen, and S. Mandal, “Nanomanipulation using near field photonics,” Lab Chip 11(6), 995–1009 (2011).
[Crossref] [PubMed]

Nano Lett. (1)

S. Mandal, X. Serey, and D. Erickson, “Nanomanipulation using silicon photonic crystal resonators,” Nano Lett. 10(1), 99–104 (2010).
[Crossref] [PubMed]

Nat. Commun. (2)

K. Wang, E. Schonbrun, P. Steinvurzel, and K. B. Crozier, “Trapping and rotating nanoparticles using a plasmonic nano-tweezer with an integrated heat sink,” Nat. Commun. 2, 469 (2011).
[Crossref] [PubMed]

P. P. Patra, R. Chikkaraddy, R. P. N. Tripathi, A. Dasgupta, and G. V. P. Kumar, “Plasmofluidic single-molecule surface-enhanced Raman scattering from dynamic assembly of plasmonic nanoparticles,” Nat. Commun. 5, 4357 (2014).
[Crossref] [PubMed]

Nat. Photonics (2)

A. N. Grigorenko, N. W. Roberts, M. R. Dickinson, and Y. Zhang, “Nanometric optical tweezers based on nanostructured substrates,” Nat. Photonics 2(6), 365–370 (2008).
[Crossref]

M. L. Juan, M. Righini, and R. Quidant, “Plasmon nano-optical tweezers,” Nat. Photonics 5(6), 349–356 (2011).
[Crossref]

Nat. Protoc. (1)

L. B. Kong, P. F. Zhang, G. W. Wang, J. Yu, P. Setlow, and Y. Q. Li, “Characterization of bacterial spore germination using phase-contrast and fluorescence microscopy, Raman spectroscopy and optical tweezers,” Nat. Protoc. 6(5), 625–639 (2011).
[Crossref] [PubMed]

Nature (2)

A. H. Yang, S. D. Moore, B. S. Schmidt, M. Klug, M. Lipson, and D. Erickson, “Optical manipulation of nanoparticles and biomolecules in sub-wavelength slot waveguides,” Nature 457(7225), 71–75 (2009).
[Crossref] [PubMed]

J. F. Li, Y. F. Huang, Y. Ding, Z. L. Yang, S. B. Li, X. S. Zhou, F. R. Fan, W. Zhang, Z. Y. Zhou, Y. Wu, B. Ren, Z. L. Wang, and Z. Q. Tian, “Shell-isolated nanoparticle-enhanced Raman spectroscopy,” Nature 464(7287), 392–395 (2010).
[Crossref] [PubMed]

Opt. Express (3)

Opt. Lett. (5)

Phys. Rev. Lett. (1)

G. Volpe, R. Quidant, G. Badenes, and D. Petrov, “Surface plasmon radiation forces,” Phys. Rev. Lett. 96(23), 238101 (2006).
[Crossref] [PubMed]

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Figures (5)

Fig. 1
Fig. 1 (a) Illustration of the nanotweezer SERS system. (b) Schematic diagram of the experimental setup. F: Filter; BS: Beam splitter; FC: Fiber coupler.
Fig. 2
Fig. 2 (a) Chip assembly consisting of waveguide chip, cassette, and three bonded optical fibers. (b) Schematic illustration of waveguide chip. (c) Microscope view of chip at experimental window.
Fig. 3
Fig. 3 Images of waveguides during the trapping of (a) single bare Ag NPs and (b) single poly (allylamine) coated (beige shading in inset figure) Ag NPs with adsorbed 4-aminothiophenol (4-ATP) (green icons in inset figure) molecules using a 1064 nm laser. Trapping of bare Ag NPs leads to bubble formation and damage to the waveguide. Trapping of poly-coated Ag NPs are visualized by the light scattering on the waveguide surface.
Fig. 4
Fig. 4 (a) Far-field 785 nm laser excited SERS spectra of 4-ATP (curve I) from an aggregation of poly-coated Ag NPs deposited on a quartz coverslip, (curve II) from an aggregation of poly-coated Ag NPs without 4-ATP, and (curve III) from an aggregation of bare Ag NPs. (b) 785 nm evanescent wave excited SERS spectra of 4-ATP (curve I) from waveguide trapped single poly-coated Ag NPs and (curve II) from waveguide trapped poly-coated Ag NPs without 4-ATP. (c) Evanescent wave excited (curve I) and far-field (curve II) SERS spectra of 4-ATP for the same single poly-coated Ag NP on the waveguide surface.
Fig. 5
Fig. 5 (a) Waveguide excited anti-Stokes SERS spectra of 4-ATP (curve I) excited by 1064 nm evanescent wave from waveguide trapped poly-coated Ag NPs and (curve II) from waveguide trapped poly-coated Ag NPs without 4-ATP. (b) Far-field SERS spectra excited by 785 nm laser and (c) waveguide excited anti-Stokes SERS spectra excited by 1064 nm evanescent wave of 4-ATP for the same single poly-coated Ag NPs trapped by waveguide with 1064 nm evanescent wave.

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