Ion-Induced Defects in Graphite: A Combined Kelvin Probe and Raman Microscopy Investigation

Ion-Induced Defects in Graphite: A Combined Kelvin Probe and Raman Microscopy Investigation

Bibliographic Details
Parent link:Physica Status Solidi A: Journal
Vol. 216, iss. 19.— 2019.— [1900055, 8 p.]
Corporate Authors: Национальный исследовательский Томский политехнический университет Инженерная школа новых производственных технологий Отделение материаловедения, Национальный исследовательский Томский политехнический университет Исследовательская школа химических и биомедицинских технологий
Other Authors: Rodriguez (Rodriges) Contreras R. D. Raul David, Khan Z. Zoheb, Ma Bing, Mukherjee A. Ashutosh, Meszmer P. Peter, Kalbacova Ja. Jana, Garratt E. Elias, Harsha S. Shah, Heilmann J. Jens, Hight Walker A. R. Angela, Wunderle B. Bernhard, Sheremet E. S. Evgeniya Sergeevna, Hietschold M. Michael, Zahn D. R. T. Dietrich
Summary:Title screen
Carbon nanomaterials are important for future sensors and electronics. Defects determine the material properties, therefore, it is critical to find new ways to investigate defects at the nanoscale. In this context, Raman spectroscopy (RS) is the tool of choice to study defects in carbon nanomaterials. On the other hand, Kelvin probe force microscopy (KPFM) provides structural and surface potential information at the nanoscale. Here, the authors demonstrate the synergistic application of these methods in the investigation of ion-beam-induced defects in graphite. KPFM and RS imaging are used for visualizing ion-induced defects in a wide range of ion doses from 1010 to 1016 ions cm-2. For the lower range of ion dose, the authors find that RS provides image contrast for the different defect regions in graphite up to a dose of 5•1013 ions cm-2. For higher doses, the sp2 carbon concentration becomes so small that the Raman spectra get dominated by broad amorphous carbon bands. For this dose range, the KPFM contrast allows the defective regions to be differentiated. This contrast in KPFM originates from sp3 carbons that act as charge traps. The results show that KPFM and Raman microscopy make a powerful and necessary combination for studying the spatial distribution of defects in carbon.
Published: 2019
Subjects:
электронный ресурс
труды учёных ТПУ
дефекты
графиты
микроскопия
углеродные наноматериалы
рамановская спектроскопия
Online Access:https://doi.org/10.1002/pssa.201900055
Format: Electronic Book Chapter
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=664324

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