High magnetic field quantum transport in Au nanoparticle-cellulose films

Turyanska, L. and Makarovsky, O. and Patane, A. and Kozlova, N. V. and Liu, Z. and Li, M. and Mann, S. (2012) High magnetic field quantum transport in Au nanoparticle-cellulose films. Nanotechnology, 23 (4). ISSN 0957-4484

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Abstract

We report the magneto-transport properties of cellulose films comprising interconnected networks of gold nanoparticles (Au NPs). Cellulose is a biopolymer that can be made electrically conducting by cellulose regeneration in Au NP dispersions. The mechanism of electronic conduction in the Aucellulose films changes from variable range hopping to metallic-like conduction with decreasing resistivity. Our experiments in high magnetic fields (up to 45T) reveal negative magnetoresistance in the highly resistive films. This is attributed to the spin polarization of the Au NPs and the magnetic field induced suppression of electron spin flips during spin-polarized tunneling in the NP network. © 2012 IOP Publishing Ltd.

Keywords:Cellulose regeneration, Electron-spin-flip, Electronic conduction, Gold nanoparticle, High magnetic fields, Interconnected network, Magneto transport properties, Negative magneto-resistance, Quantum transport, Resistive film, Spin-polarized tunneling, Variable range hopping, Cellulose, Electric resistance, Electrospinning, Gold, Gold alloys, Magnetic fields, Magnetic moments, Nanomagnetics, Nanoparticles, Quantum chemistry, Quantum electronics, Spin dynamics, Transport properties, Cellulose films, Cellulose, Gold Compounds, Magnetic Properties, Thin Films, cellulose, metal nanoparticle, article, chemistry, electricity, magnetic field, motion, quantum theory, temperature, ultrastructure, Cellulose, Metal Nanoparticles
Subjects:F Physical Sciences > F300 Physics
Divisions:College of Science > School of Chemistry
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ID Code:22517
Deposited On:30 Mar 2016 09:41

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