The correlation between electrical conductivity and second-order Raman modes of laser-reduced graphene oxide

The correlation between electrical conductivity and second-order Raman modes of laser-reduced graphene oxide

Dettagli Bibliografici
Parent link:Physical Chemistry Chemical Physics
Vol. 21, iss. 19.— 2019.— [P. 10125-10134]
Enti autori: Национальный исследовательский Томский политехнический университет Исследовательская школа химических и биомедицинских технологий (ИШХБМТ), Национальный исследовательский Томский политехнический университет Инженерная школа природных ресурсов Отделение геологии, Национальный исследовательский Томский политехнический университет Исследовательская школа физики высокоэнергетических процессов
Altri autori: Ma Bing, Rodriguez (Rodriges) Contreras R. D. Raul David, Ruban A. S. Aleksey Sergeevich, Pavlov S. K. Sergey Konstantinovich, Sheremet E. S. Evgeniya Sergeevna
Riassunto:Title screen
Raman spectroscopy is the tool of choice in the physicochemical investigation of carbon nanomaterials. However, Raman analysis of graphene oxide (GO) is lagging in comparison to the rich information gained in the case of carbon nanotubes and graphene. Here, we carried out a joint current sensing atomic force microscopy (CSAFM) and Raman spectroscopy investigation of laser-reduced GO. Reduced graphene oxide (rGO) was obtained under different laser powers in the range from 0.1 to 10 mW (532 nm). We compare the Raman spectra and the electrical conductivity at the nanoscale obtained by current sensing atomic force microscopy. Our analysis shows that three bands in the second-order region (2D, D + G, 2G), in the range from 2500 to 3200 cm?1, are uniquely sensitive to the degree of reduction. Moreover, we found that the changes in peak area ratios AD+G/AD and A2G/AD show a direct correlation with the electrical resistance of rGO. We establish an optical micro-spectroscopy way to assess the degree of reduction in laser-reduced GO. These new insights provide a convenient and useful way to investigate the reduction of rGO from the fitting analysis of Raman spectra, becoming a useful tool in fundamental research and the development of rGO-based microdevices.
Режим доступа: по договору с организацией-держателем ресурса
Lingua:inglese
Pubblicazione: 2019
Soggetti:
электронный ресурс
труды учёных ТПУ
корреляции
оксид графена
углеродные наноматериалы
спектроскопия
Accesso online:http://dx.doi.org/10.1039/C9CP00093C
Natura: Elettronico Capitolo di libro
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=660461

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