High-Resolution Nanospectroscopy of Boron Nitride Nanotubes

Dániel Datz, Gergely Németh, Hajnalka M. Tóháti, Áron Pekker, Katalin Kamarás

Research output: Contribution to journalArticle

Abstract

Scattering type scanning near-field optical microscopy (s-SNOM) is an effective tool for the nanoscale examination of nano-objects. In this paper, we present a modified device setup that enables spectroscopic measurements with a tunable laser, even without an FTIR (Fourier Transform Infrared) spectroscopy add-on. We demonstrate the effectiveness of this setup by measurements on boron nitride nanotubes (BNNTs). In far-field absorption measurements, BNNTs have a characteristic peak around 1375 cm−1 due to a phonon polariton mode. This peak is also visible in near-field measurements along with several other peaks that are not present in the far-field spectrum. As these peaks are caused by local defects, their spatial distribution reveals the defect structure of individual nanotubes.

Original languageEnglish
Article number1700277
JournalPhysica Status Solidi (B) Basic Research
Volume254
Issue number11
DOIs
Publication statusPublished - Nov 2017

Keywords

  • BN
  • absorption spectra
  • nanotubes
  • near-field infrared microscopy
  • scanning near-field optical microscopy

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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