Near‐field Raman spectroscopy using a sharp metal tip

Near‐field Raman spectroscopy with a spatial resolution of 20 nm is demonstrated by raster scanning a sharp metal tip over the sample surface. The method is used to image vibrational modes of single‐walled carbon nanotubes. By combining optical and topographical signals rendered by the single‐walled carbon nanotubes, we can separate near‐field and far‐field contributions and quantify the observed Raman enhancement factors.

[1]  Satoshi Kawata,et al.  Near-field Raman imaging of organic molecules by an apertureless metallic probe scanning optical microscope , 2002 .

[2]  Linda T. Nieman,et al.  An apertureless near-field scanning optical microscope and its application to surface-enhanced Raman spectroscopy and multiphoton fluorescence imaging , 2001 .

[3]  Zhonghua Yu,et al.  Rayleigh and Raman Scattering from Individual Carbon Nanotube Bundles , 2001 .

[4]  John E. Wessel,et al.  Surface-enhanced optical microscopy , 1985 .

[5]  C. L. Jahncke,et al.  Electric field gradient effects in raman spectroscopy. , 2000, Physical review letters.

[6]  M. Dresselhaus,et al.  Surface-enhanced and normal stokes and anti-stokes Raman spectroscopy of single-walled carbon nanotubes. , 2000, Physical review letters.

[7]  Novotny,et al.  Orientational imaging of single molecules by annular illumination , 2000, Physical review letters.

[8]  Steven R. Emory,et al.  Probing Single Molecules and Single Nanoparticles by Surface-Enhanced Raman Scattering , 1997, Science.

[9]  J. Hafner,et al.  Anomalous two-peak G'-band Raman effect in one isolated single-wall carbon nanotube , 2002 .

[10]  Charles M. Lieber,et al.  Structural ( n, m) determination of isolated single-wall carbon nanotubes by resonant Raman scattering. , 2001, Physical review letters.

[11]  K. Karrai,et al.  Piezoelectric tip‐sample distance control for near field optical microscopes , 1995 .

[12]  M. Burghard,et al.  Polarized raman spectroscopy on isolated single-wall carbon nanotubes. , 2000, Physical review letters.

[13]  R. Dasari,et al.  Single Molecule Detection Using Surface-Enhanced Raman Scattering (SERS) , 1997 .

[14]  Satoshi Kawata,et al.  Near-field Raman scattering enhanced by a metallized tip , 2001 .

[15]  A. M. Rao,et al.  Diameter-Selective Raman Scattering from Vibrational Modes in Carbon Nanotubes , 1997, Science.

[16]  Xu,et al.  Electromagnetic contributions to single-molecule sensitivity in surface-enhanced raman scattering , 2000, Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics.

[17]  J. Maultzsch,et al.  Raman scattering in carbon nanotubes revisited , 2002 .

[18]  X. Xie,et al.  Near-field fluorescence microscopy based on two-photon excitation with metal tips , 1999 .

[19]  R. Zenobi,et al.  Nanoscale chemical analysis by tip-enhanced Raman spectroscopy , 2000 .

[20]  Lukas Novotny,et al.  Near-field optical imaging using metal tips illuminated by higher-order Hermite–Gaussian beams , 1998 .