Singhbabu, Y N and Choudhary, Shyam K and Shukla, N and Das, S and Sahu, Ranjan K (2015) Observation of large positive magneto-resistance in bubble decorated graphene oxide films derived from shellac biopolymer: a new carbon source and facile method for morphology-controlled properties†. Nanoscale, 7 (IF-6.739). pp. 6510-6519.
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We report a large positive magneto-resistance (MR) in bubble decorated graphene oxide films that are derived from shellac biopolymer as a carbon source. These films were produced on a quartz substrate by heating the biopolymer coated substrate at 900 °C in an argon atmosphere. The characterization data of the films using Raman, X-ray photoelectron spectroscopy, field emission scanning electron microscopy and transmission electron microscopy reveal that shellac can be used as a new carbon source to produce transparent bubble decorated graphene oxide films. The magneto-resistance results show a 130% change in the resistance of the films at 3 K under a perpendicular magnetic field of 15 T, and the value decreases exponentially up to 50 K. The observed MR properties of the bubble decorated graphene oxide films are explained using a weak anti-localization and quantum interference model in the low magnetic field region, while the Lorentz force accounts for the MR properties well in the high magnetic field region.
|Uncontrolled Keywords:||characterization X-ray biopolymer magneto-resistance carbon morphology-controlled|
|Divisions:||Material Science and Technology|
|Deposited By:||Sahu A K|
|Deposited On:||23 Apr 2015 15:40|
|Last Modified:||01 May 2015 10:35|
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