Characterizations and optimization of electrical contact between nanocomposite elastomer and metal

Huan Hu*, Chang Liu

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

5 Scopus citations

Abstract

Nanocomposite elastomer is an exciting, emerging class of materials for polymer MEMS sensors and actuators [1-3]. It is made by mixing electrically conducting particles (e.g., carbon nanotubes) in regular, nonconducting elastomer (e.g., PDMS) beyond percolation limit. The bulk resistance of the polymer is a function of particle doping concentration and other parameters (e.g., applied stress). The electrical contact between this material and patterned electrodes is crucial for future device performance but has not been systematically investigated in the past. In this work, we present comprehensive characterization of contact resistance between the nanocomposite elastomer and metal electrodes. We report the I-V and drift properties under different applied pressure. We discovered that liquid metal alloy (Galinstan: 68.5% Ga, 21.5% In, 10% Sn) could be used to drastically reduce the contact resistance and eliminate long term drift from 20% to below 2%.

Original languageEnglish (US)
Title of host publicationTRANSDUCERS 2009 - 15th International Conference on Solid-State Sensors, Actuators and Microsystems
Pages1103-1105
Number of pages3
DOIs
StatePublished - Dec 11 2009
EventTRANSDUCERS 2009 - 15th International Conference on Solid-State Sensors, Actuators and Microsystems - Denver, CO, United States
Duration: Jun 21 2009Jun 25 2009

Publication series

NameTRANSDUCERS 2009 - 15th International Conference on Solid-State Sensors, Actuators and Microsystems

Other

OtherTRANSDUCERS 2009 - 15th International Conference on Solid-State Sensors, Actuators and Microsystems
CountryUnited States
CityDenver, CO
Period6/21/096/25/09

Keywords

  • Contact resistance
  • Liquid metal alloy
  • Nanocomposite elastomer

ASJC Scopus subject areas

  • Hardware and Architecture
  • Electrical and Electronic Engineering

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