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Title: Facile fabrication of graphene devices through metalloporphyrin induced photocatalytic reduction
Authors: Khaderbad, Mrunal A.
Oo, Than Z.
Tjoa, Verawati
Wei, Jun
Sheri, Madhu
Mangalampalli, Ravikanth
Rao, V. Ramgopal
Mhaisalkar, Subodh Gautam
Mathews, Nripan
Issue Date: 2012
Source: Khaderbad, M. A., Tjoa, V., Oo, T. Z., Wei, J., Sheri, M., Mangalampalli, R., et al. (2012). Facile fabrication of graphene devices through metalloporphyrin induced photocatalytic reduction. RSC Advances, 2(10), 4120-4124.
Series/Report no.: RSC advances
Abstract: Solution processed graphene oxide (GO) sheets are electronically insulating and are generally reduced by chemical treatment or heat treatment in a reducing environment to recover their electronic properties, forming reduced graphene oxide (rGO). Here, GO sheets were photocatalytically reduced using 5-(4-hydroxyphenyl)-10,15,20-tri(p-tolyl) zinc(II) porphyrin (Zn(II)TTPOH) under ambient conditions. After illumination in the presence of a hole scavenger and Zn(II)TTPOH, the formation of rGO was confirmed through optical absorption measurements and monitoring of the D/G peak ratios from Raman measurements. The resultant rGO formed stable aqueous suspensions with the Zn(II)TTPOH. The electron transfer from photoexcited porphyrin to GO was studied through photoluminescence measurements. Utilising this photoreduction process as a post processing strategy, an increase in conductivity and an ambipolar field effect transistor (FET) behaviour were demonstrated on prepatterned GO devices. We have also confirmed the photoreduction process at low energy wavelengths (588 nm), indicating the versatility of using metalloporphyrins as photocatalysts for graphene oxide reduction.
ISSN: 2046-2069
DOI: 10.1039/c2ra00792d
Rights: © 2012 The Royal Society of Chemistry.
Fulltext Permission: none
Fulltext Availability: No Fulltext
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