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A 1.7 nm resolution chemical analysis of carbon nanotubes by tip-enhanced Raman imaging in the ambient

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  • Chi Chen

    (Near Field Nanophotonics Research Team, RIKEN Center for Advanced Photonics (RAP), The Institute of Physical and Chemical Research (RIKEN)
    Present address: Research Center for Applied Sciences, Academia Sinica, Taipei 115, Taiwan)

  • Norihiko Hayazawa

    (Near Field Nanophotonics Research Team, RIKEN Center for Advanced Photonics (RAP), The Institute of Physical and Chemical Research (RIKEN))

  • Satoshi Kawata

    (Near Field Nanophotonics Research Team, RIKEN Center for Advanced Photonics (RAP), The Institute of Physical and Chemical Research (RIKEN)
    Osaka University)

Abstract

Surface morphology of materials is routinely analysed by an atomic force microscope and scanning tunneling microscope (STM) down to subnanometer precision. However, it is still challenging to investigate the surface chemistry simultaneously, which requires specific capability of force or tunneling spectroscopy in ultrahigh vacuum environment and liquid Helium temperature. Here we demonstrate the simultaneous chemical and structural analysis of individual carbon nanotubes (CNTs) by STM-based tip-enhanced Raman spectroscopy (STM-TERS) with 1.7 nm spatial resolution in the ambient. Raman contrast over different types of CNTs, local defects, diameters and bundling effect are all visualized in real space. Disengaging from ultrahigh vacuum and cryogenic environment, our ambient STM-TERS imaging is powerful in analysing local chemistry for CNTs and also suitable for analysing as-made and soft materials, which cannot be seen with general electron microscopy techniques.

Suggested Citation

  • Chi Chen & Norihiko Hayazawa & Satoshi Kawata, 2014. "A 1.7 nm resolution chemical analysis of carbon nanotubes by tip-enhanced Raman imaging in the ambient," Nature Communications, Nature, vol. 5(1), pages 1-5, May.
    • Handle: RePEc:nat:natcom:v:5:y:2014:i:1:d:10.1038_ncomms4312
    DOI: 10.1038/ncomms4312
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