High-Resolution Nanospectroscopy of Boron Nitride Nanotubes

Datz, Dániel and Németh, G. and Tóháti, Hajnalka-Mária and Pekker, Áron and Kamarás, Katalin (2017) High-Resolution Nanospectroscopy of Boron Nitride Nanotubes. PHYSICA STATUS SOLIDI B-BASIC RESEARCH, 254 (11). No.-1700277. ISSN 0370-1972

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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.

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