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

Henry S.C. Yu, Giovanni Boero, Jurgen Brugger
2019 2019 20th International Conference on Solid-State Sensors, Actuators and Microsystems & Eurosensors XXXIII (TRANSDUCERS & EUROSENSORS XXXIII)  
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
more » ... erformed 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.
doi:10.1109/transducers.2019.8808819 fatcat:huffggpv7fc3njrw2qjm4vq5cu