Harnessing Poisson Effect to Realize Tunable Tunneling Nanogap Electrodes on PDMS Substrates for Strain Sensing

Nanogap electrodes (NGEs) are a fundamental structure for the exploration of nanoscale phenomena. In this paper, we describe the fabrication and the electro-mechanical characterization of tunable tunneling NGEs on a stretchable PDMS substrate. Bottom-up capillary-assisted particle assembly (CAPA) in nano-scale traps is used to fabricate Au nanorod dimers as NGEs. The nanogap is tuned by the contraction due to the Poisson effect of the PDMS substrate. Finite element method (FEM) simulations are performed to quantify how the NGEs design affects the local Poisson contraction under applied tensile strain. The application of the proposed approach for strain sensing is discussed.

Published in:
Solid State Sensors and Actuators (TRANSDUCERS), International Conference on , 2368-2371
Presented at:
20th International Conference on Solid-State Sensors, Actuators and Microsystems & Eurosensors XXXIII (TRANSDUCERS & EUROSENSORS XXXIII), Berlin, Germany, June 23-27, 2019
Aug 22 2019
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 Record created 2019-08-27, last modified 2019-08-30

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