Year: 2025
Type: article
Abstract: ABSTRACT Tellurium‐based nanowires are interesting structures for applications in low‐dimensional electronics. This work investigates the vibrational dynamics of trigonal tellurium (t‐Te) nanowires through tip‐enhanced Raman spectroscopy (TERS), achieving spatial resolution in the 50‐nm range. The analysis revealed a dependence of the Raman active phonon mode frequency on nanowire diameter. Besides the observation of different frequencies for isolated nanowires with different diameters, we also observed changes of the mode frequency along the axis of a single nanowire that are consistent with diameter changes measured by in situ atomic force microscopy (AFM). Furthermore, we demonstrate that the mode frequency also changes along a single nanowire species due to local strain likely induced by the presence of amorphous material deposited on top. Our work thus provides detailed insights into the nanoscale vibrational and structural properties of t‐Te nanowires, highlighting the capabilities of TERS to study of Raman shifts along single nanowires.
Source: Journal of Raman Spectroscopy
DOI: 10.1002/jrs.70076
Authors: Diego Sier, Rafael Nadas, André G. Pereira, Gabriel Tomaz Massardi, Erika Peixoto Pimenta, Sukarno Olavo Ferreira, Eduardo Nery Duarte Araujo, Ado Jorio
Language: English
Field: Materials Science
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $4,020
Awards: REDE MINEIRA DE PESQUISA EM MATERIAIS BIDIMENSIONAIS E SUAS APLICAÇÕES - REDE 2D, G15906547, CRESCIMENTO FOTOINDUZIDO DE HETEROESTRUTURAS À BASE DE TELÚRIO, REDE MINEIRA DE NANOTECNOLOGIA APLICADA À CONVERSÃO DE ENERGIA E EFICIÊNCIA FOTOVOLTAICA, CARACTERIZAÇÃO DE MATERIAIS BIDIMENSIONAIS COM ESPECTROSCOPIA ÓPTICA DE CAMPO PRÓXIMO, PLATAFORMA TECNOLÓGICA PARA EXPANSÃO DAS APLICAÇÕES DO NANOSCÓPIO ÓPTICO, REDE DE PESQUISA E INOVAÇÃO PARA BIOENGENHARIA DE NANOSSISTEMAS, G3690646728, FABRICAÇÃO E CARACTERIZAÇÃO DE NANOESTRUTURAS SEMICONDUTORAS BASEADAS EM MATERIAIS AVANÇADOS
OpenAlex ID: W4416673344