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†

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.

[img]PDF
Restricted to NML users only. Others may use ->

2651Kb

Abstract

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.

Item Type:Article
Official URL/DOI:http://www.ncbi.nlm.nih.gov/pubmed/25788392
Uncontrolled Keywords:characterization X-ray biopolymer magneto-resistance carbon morphology-controlled
Divisions:Material Science and Technology
ID Code:7227
Deposited By:Sahu A K
Deposited On:23 Apr 2015 15:40
Last Modified:01 May 2015 10:35
Related URLs:

Repository Staff Only: item control page