Tip‐heating‐assisted Raman spectroscopy at elevated temperatures

Abstract

We demonstrate tip-heating-assisted enhanced Raman spectroscopy to investigate the temperature dependence of the carbon nanotube G-band with nanoscale resolution. The controllable and nanoscale heat generated at the tip apex was used to thermally perturb and characterize a small volume in a carbon nanotube sample that is precisely positioned underneath the tip. The dependence of tip enhancement with temperature was also experimentally examined, which is in good agreement with the enhancement calculated from the electromagnetic model of isolated spheroids. The technique presented may open up opportunities in the study of controlled heat-assisted biochemical reactions and physical transformations of nanostructures. It can also be used for thermal characterization of various materials requiring site-selective and controllable nanoscale heat source and could enable the realization of new photothermal devices.

Nanoscale Chemical Imaging Using Tip‐Enhanced Raman Spectroscopy: A Critical Review

“…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.…”

Tip-enhanced Raman spectroscopy: principles and applications

“…Carbon nanotubes (CNTs) are the most widely-studied nanomaterials using TERS so far [12,46,[82][83][84][85][86][87][88][89][90][91][92][93][94][95][96][97][98][99][100]. 1-D structures like single wall CNTs (SWCNTs) are the preferred samples to demonstrate the high resolution capability of a TERS instrument.…”

Chemische Bildgebung auf der Nanometerskala mittels spitzenverstärkter Raman‐Spektroskopie

“…B. auch CdSe‐Nanodrähte untersucht wurden. Die Arbeitsgruppen von Novotny,40, 44, 98 Hartschuh,45, 99–103 Maultzsch,104–106 Williams107 und Kawata11, 108 lieferten wichtige Beiträge auf diesem Gebiet. CNTs haben sich auch zu beliebten “Testproben” für technische Neuerungen im Zusammenhang mit TERS entwickelt, wie z.…”