Document Type

Article

Publication Date

5-23-2019

Publication Title

Nanoscale

Issue

23

Publisher

Royal Society of Chemistry

DOI

10.1039/C9NR02251A

Abstract

Impact of plasma treatment on graphene's transport properties and interaction with gas molecules has been investigated with Raman, X-ray photoelectron spectroscopy, and Hall measurements. Experimental results indicate the formation of nanocrystalline domains and the enhanced fraction of adsorbed oxygen following oxygen plasma treatment, which correlates with a significant reduction in carrier mobility and an increase in carrier density. The oxygen plasma treated graphene was found to exhibit much stronger sensitivity toward NH3 molecules both in terms of magnitude and response rate, attributable to increased domain edges and oxygen adsorption related enhancement in p-type doping. The carrier mobility in plasma exposed graphene was modeled considering both ionized impurity and short-range scattering, which matched well with the experimentally observed mobility.

Comments

This manuscript has been published in the journal Nanoscale. Please find the published version here (note that a subscription is necessary to access this version):

https://pubs.rsc.org/en/content/articlelanding/2019/nr/c9nr02251a#!divAbstract

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