Enhanced electrical conductivity in polystyrene nanocomposites at ultra-low graphene content.
Summary of "Enhanced electrical conductivity in polystyrene nanocomposites at ultra-low graphene content."
We compared the electrical conductivity of multiwalled-carbon-nanotube/polystyrene and graphene/polystyrene composites. The conductivity of polystyrene increases from ∼6.7 × 10(-14) to ∼3.49 S/m, with an increase in graphene content from ∼0.11 to ∼1.1 vol %. This is ∼2-4 orders of magnitude higher than for multiwalled-carbon-nanotube/polystyrene composites. Furthermore, we show that the conductivity of the graphene/polystyrene system can be significantly enhanced by incorporation of polylactic acid. The volume-exclusion principle forces graphene into the polystyrene-rich regions (selective localization) and generates ∼4.5-fold decrease in its percolation threshold from ∼0.33 to ∼0.075 vol %.
Affiliation
State Key Laboratory of Organic-Inorganic Composites, Department of Polymer Engineering, College of Materials Science and Engineering, Beijing University of Chemical Technology , Beijing 100029, China.
Journal Details
This article was published in the following journal.
Name: ACS applied materials & interfaces
ISSN: 1944-8252
Pages: 3130-3
Links
- PubMed Source: http://www.ncbi.nlm.nih.gov/pubmed/21744832
- DOI: http://dx.doi.org/10.1021/am200628c
Medical and Biotech [MESH] Definitions
Semiconductors
Materials that have a limited and usually variable electrical conductivity. They are particularly useful for the production of solid-state electronic devices.
Conductometry
Determination of the quantity of a material present in a mixture by measurement of its effect on the electrical conductivity of the mixture. (Webster, 3d ed)
Nanostructures
Materials which have structured components with at least one dimension in the range of 1 to 100 nanometers. These include NANOCOMPOSITES; NANOPARTICLES; NANOTUBES; and NANOWIRES.
Electrical Equipment And Supplies
Apparatus and instruments that generate and operate with ELECTRICITY, and their electrical components.
Evoked Potentials, Motor
The electrical response evoked in a muscle or motor nerve by electrical or magnetic stimulation. Common methods of stimulation are by transcranial electrical and TRANSCRANIAL MAGNETIC STIMULATION. It is often used for monitoring during neurosurgery.
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