Nanoscale imaging of carbon nanotubes using tip enhanced Raman spectroscopy in reflection mode.

An apertureless tip enhanced Raman spectrometer in reflection mode geometry is demonstrated. A spatial resolution as small as 30 nm was achieved. This was implemented by placing a sharp gold tip near the single wall carbon nanotubes using an atomic force microscope (AFM). The tip was illuminated from the same side of the sample which eliminated the need for a transparent substrate. The tip was maintained at a distance of a few nanometers using a quartz tuning fork. The Raman signal was collected from the G peak of the single wall carbon nanotubes using a single photon detecting module and topography image was acquired by the AFM.

[1]  Eric Betzig,et al.  Collection mode near‐field scanning optical microscopy , 1987 .

[2]  S Benrezzak,et al.  Fluorescence imaging of submicrometric lattices of colour centres in LiF by an apertureless scanning near-field optical microscope. , 2001, Optics express.

[3]  K. S. Krishnan,et al.  A New Type of Secondary Radiation , 1928, Nature.

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

[5]  S. Kawata,et al.  Metallized tip amplification of near-field Raman scattering , 2000 .

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

[7]  D N Batchelder,et al.  Apertureless near‐field Raman spectroscopy , 2003, Journal of microscopy.

[8]  M. Dresselhaus,et al.  Anti-Stokes Raman spectra of single-walled carbon nanotubes , 2000 .

[9]  L. Novotný,et al.  Simultaneous Fluorescence and Raman Scattering from Single Carbon Nanotubes , 2003, Science.

[10]  T. Clyne,et al.  Ag nanoparticle induced surface enhanced Raman spectroscopy of chemical vapor deposition diamond thin films prepared by hot filament chemical vapor deposition , 2002 .

[11]  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.

[12]  Y. Martin,et al.  Scanning Interferometric Apertureless Microscopy: Optical Imaging at 10 Angstrom Resolution , 1995, Science.

[13]  Z. Kam,et al.  Absorption and Scattering of Light by Small Particles , 1998 .

[14]  Christopher C. Davis,et al.  A phase-locked shear-force microscope for distance regulation in near-field optical microscopy , 1997 .

[15]  Nicholas A. Klymyshyn,et al.  Finite Element Method Simulation of the Field Distribution for AFM Tip-Enhanced Surface-Enhanced Raman Scanning Microscopy , 2003 .

[16]  M. Dresselhaus,et al.  Raman studies on 0.4 nm diameter single wall carbon nanotubes , 2002 .

[17]  Cheng,et al.  Polarized raman study of single-wall semiconducting carbon nanotubes , 2000, Physical review letters.

[18]  M. Allegrini,et al.  Near‐field Raman imaging of morphological and chemical defects in organic crystals with subdiffraction resolution , 2003, Journal of microscopy.

[19]  Lukas Novotny,et al.  High-resolution near-field Raman microscopy of single-walled carbon nanotubes. , 2003, Physical review letters.

[20]  F. Keilmann,et al.  Material-specific mapping of metal/semiconductor/dielectric nanosystems at 10 nm resolution by backscattering near-field optical microscopy , 2002 .

[21]  B. Ren,et al.  Preparation of gold tips suitable for tip-enhanced Raman spectroscopy and light emission by electrochemical etching , 2004 .

[22]  L. B. Ebert.  Science of fullerenes and carbon nanotubes , 1996 .

[23]  F. Keilmann,et al.  Performance of visible and mid‐infrared scattering‐type near‐field optical microscopes , 2003, Journal of microscopy.

[24]  L. Novotný,et al.  Near‐field Raman spectroscopy using a sharp metal tip , 2003, Journal of microscopy.

[25]  John T. Krug,et al.  Design of near-field optical probes with optimal field enhancement by finite difference time domain electromagnetic simulation , 2002 .

[26]  W. Denk,et al.  Optical stethoscopy: Image recording with resolution λ/20 , 1984 .

[27]  R. W. Christy,et al.  Optical Constants of the Noble Metals , 1972 .

[28]  A. Meixner,et al.  Near‐field and confocal surface‐enhanced resonance Raman spectroscopy at cryogenic temperatures , 2003, Journal of microscopy.

[29]  A. Demming,et al.  Resonant excitation of tip plasmons for tip-enhanced Raman SNOM. , 2004, Ultramicroscopy.

[30]  Riichiro Saito,et al.  Origin of the Breit-Wigner-Fano lineshape of the tangential G-band feature of metallic carbon nanotubes , 2001 .

[31]  H. Kataura,et al.  Optical Properties of Single-Wall Carbon Nanotubes , 1999 .

[32]  P. Hoffmann,et al.  Gold elliptical nanoantennas as probes for near field optical microscopy , 2002 .

[33]  Zexiang Shen,et al.  Near‐field scanning Raman microscopy using apertureless probes , 2003 .