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Spectroscopic studies of the physical origin of environmental aging effects on doped graphene

Chang, J.-K. and Hsu, C.-C. and Liu, S.-Y. and Wu, C.-I. and Gharib, M. and Yeh, N.-C. (2016) Spectroscopic studies of the physical origin of environmental aging effects on doped graphene. Journal of Applied Physics, 119 (23). Art. No. 235301. ISSN 0021-8979. http://resolver.caltech.edu/CaltechAUTHORS:20160616-072056557

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Abstract

The environmental aging effect of doped graphene is investigated as a function of the organic doping species, humidity, and the number of graphene layers adjacent to the dopant by studies of the Raman spectroscopy, x-ray and ultraviolet photoelectron spectroscopy, scanning electron microscopy, infrared spectroscopy, and electrical transport measurements. It is found that higher humidity and structural defects induce faster degradation in doped graphene. Detailed analysis of the spectroscopic data suggest that the physical origin of the aging effect is associated with the continuing reaction of H_2O molecules with the hygroscopic organic dopants, which leads to formation of excess chemical bonds, reduction in the doped graphene carrier density, and proliferation of damages from the graphene grain boundaries. These environmental aging effects are further shown to be significantly mitigated by added graphene layers.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1063/1.4953815DOIArticle
http://scitation.aip.org/content/aip/journal/jap/119/23/10.1063/1.4953815PublisherArticle
http://arxiv.org/abs/1605.04622arXivDiscussion Paper
ORCID:
AuthorORCID
Gharib, M.0000-0002-2204-9302
Yeh, N.-C.0000-0002-1826-419X
Additional Information:© 2016 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). Received 20 January 2016; accepted 14 May 2016; published online 15 June 2016. The work at Caltech was jointly supported by the National Science Foundation through the Institute of Quantum Information and Matter (IQIM) at Caltech, the Sobhani Foundation, and the Moore Foundation. J.K.C. and C.I.W. acknowledge the support of Dragon Gate Program by the National Science Council in Taiwan. We thank Professor George Rossman for the use of Raman spectrometer, and acknowledge the use of XPS facilities at the Beckman Institute at Caltech.
Group:IQIM, Institute for Quantum Information and Matter, GALCIT
Funders:
Funding AgencyGrant Number
NSFUNSPECIFIED
Institute for Quantum Information and Matter (IQIM)UNSPECIFIED
Sobhani FoundationUNSPECIFIED
Gordon and Betty Moore FoundationUNSPECIFIED
National Science Council (Taipei)UNSPECIFIED
Record Number:CaltechAUTHORS:20160616-072056557
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20160616-072056557
Official Citation:Spectroscopic studies of the physical origin of environmental aging effects on doped graphene Chang, J.-K. and Hsu, C.-C. and Liu, S.-Y. and Wu, C.-I. and Gharib, M. and Yeh, N.-C., Journal of Applied Physics, 119, 235301 (2016), DOI:http://dx.doi.org/10.1063/1.4953815
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:67958
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:16 Jun 2016 19:55
Last Modified:16 Nov 2017 21:33

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