Hemen, Kalita and Harikrishnan, V and Dhanraj, B. Shinde and Vijayamohanan, K.Pillai and Aslam, M (2013) Hysteresis and charge trapping in graphene quantum dots. Applied Physics Letters, 102 (14). p. 3104. ISSN 0003-6951 (Submitted)

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We report current hysteresis in response to applied voltage in graphene quantum dots of average diameter 4.5±0.55 nm, synthesized electrochemically using multiwalled carbon nanotubes. In response to step voltages, transient current decay characteristic of deep and shallow level charge traps with time constants 186 ms and 6 s is observed. Discharging current transients indicate charge storage of the order of 100 µC. Trap states are believed to arise due to the fast physisorption of external adsorbates,which are found to havea significant effect on charge transport and changes the resistance of the prepared device by an order of 3.

Item Type: Article
Subjects: Electrochemical Sensors
Functional Materials
Electrochemical Analysis
Electrochemical Materials Science
Depositing User: Sri Vamshi
Date Deposited: 05 Nov 2013 12:57
Last Modified: 29 Dec 2014 07:10
URI: http://cecri.csircentral.net/id/eprint/3042

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