“…Tip‐enhanced Raman spectroscopy was soon recognized as a perfect tool to overcome this limitation, and has been extensively used since 2003 to investigate such one‐dimensional structures (not only carbon nanotubes but also, e.g., CdSe nanowires). The research groups of Novotny,40, 44, 98 Hartschuh,45, 99–103 Maultzsch,104–106 Williams,107 and Kawata11, 108 have made significant contributions in this area. Carbon nanotubes have also become a popular “test sample” for new technical developments in TERS, for example, in the study of Weber‐Bargioni et al 91.…”