Transparent and through thickness conductive polystyrene films using external magnetic fields for "Z" alignment of nickel nanoparticles. Issue 35 (12th August 2015)

• Record Type: Journal Article
• Authors: Chen, Yuwei; Guo, Yuanhao; Batra, Saurabh; Wang, Enmin; Wang, Yanping; Liu, Xueqing; Wang, Yimin; Cakmak, Miko
• Is Part Of: Nanoscale. Volume 7:Issue 35(2015)
• Page Start: 14636
• Page End: 14642
• Publication Date: 2015-08-12
• Subjects: Nanoscience -- Periodicals; Nanotechnology -- Periodicals; 620.505
• DOI: 10.1039/c5nr03328d
• Languages: English
• ISSNs: 2040-3364

Abstract

Abstract : A combination of transparency, electrical conductivity and flexibility is desired in the emerging flexible electronics industry for current and future applications. Abstract : A combination of transparency, electrical conductivity and flexibility is desired in the emerging flexible electronics industry for current and future applications. In this paper, we report the development of through thickness electrical conductivity in polystyrene films filled with nickel nanopowder by external magnetic field application. This process leads to the formation of nanocolumns of nickel spanning across the thickness direction while generating nanoparticle depleted regions in between. This leads to directionally dependent enhancement in optical light transmission particularly in the normal direction of the films. With the use of as little as 2 wt% (0.22 vol%) nickel we were able to achieve high through thickness conductivity under the influence of a magnetic field. While these films exhibit high through thickness conductivity they remain non-conductive in their planes as a result of the unique nanomorphology created which eliminates potential side branch formations. These films are anticipated to be used as electrodes for touch screens, electric dissipative materials for electronic packaging and other sensors.