Advanced piezoresistance of extended metal/insulator core shell nanoparticle assemblies

Details Advanced piezoresistance of extended metal/insulator core shell nanoparticle assemblies Advanced piezoresistance of extended metal/insulator core shell nanoparticle assemblies

2010-01-21

arxiv.org/abs/1001.3809v1

PRL 101, 166804 (2008)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

14 pages, 3 figures, published in Physical Review Letters

Scientific paper

10.1103/PhysRevLett.101.166804

Assembled metal/insulator nanoparticles with a core/shell geometry provide access to materials containing a large number (>106) of tunneling barriers. We demonstrate the production of ceramic coated metal nanoparticles exhibiting an exceptional pressure sensitive conductivity. We further show that graphene bi- and trilayers on 20 nm copper nanoparticles are insulating in such core/shell geometry and show a similar pressure dependent conductivity. This demonstrates that core/shell metal/insulator assemblies offer a route to alternative sensing materials.

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