期刊
ACS APPLIED MATERIALS & INTERFACES
卷 7, 期 24, 页码 13467-13475出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.5b02508
关键词
stretchable conductors; silver nanowires; photolithography; strain sensors; vias; grid
资金
- EU
- Swiss Nanotera SpineRepair projects
- ETH Zurich
We introduce photolithography profess compatible with soft and rigid Substrates, enabling the fabrication of complex 3D interconnected patterns of silver nanowire (AgNW) networks embedded in polydimethylsiloxane (PDMS). Dimensions of the AgNW micropatterns are controlled within the film plane by photolithography, whereas thickness is controlled via a novel and uniform deposition technique using centrifugation. We report the first systematic characterization of the electromechanical properties of such microelectrodes with finest stretchable feature of 15 mu m. We observe a geometry-dependent behavior of the gauge factor not only by changing the thickness of the microelectrodes, as it has been commonly reported so far, but also by varying their lateral dimensions. The presented nanocomposites exhibited sheet resistances down to 0.6 Omega/sq, gauge factors ranging from 0:01 to 100, and stretchability above 50% uniaxial strain. This versatile process allows for the production of highly sensitive strain sensors and robust high-density stretchable conductors on a wafer scale with direct implications in mass production of stretchable electronic devices.
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