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Novel design concept to improve stability in electrical conductivity of elastomer-based conductive pastes (stretchable conductive pastes) during cyclic mechanical tension was proposed in this work. Silver (Ag) micro-flakes were selected as the main conductive fillers to prepare polyurethane-based conductive pastes. By modifying this singlemodal conductive paste with Ag micro- and nanoparticles, two...
This paper reports on the design and fabrication of buckled metal strain gauges formed using a thermally contracting shape memory polymer (SMP) via inkjet printed silver nanoparticles to create sensors realized in a large initial compressive stress state. Printed devices are placed into an oven to simultaneously sinter the nanoparticles and shrink the substrate into its final dimensions creating devices...
We are reporting, a novel reduced graphene oxide (RGO) and silver (Ag) nanocomposite based piezoresistive thin film sensor realized on kapton (polyimide) membrane substrate by drop casting method for strain sensing application. Incorporation of small quantity of (Ag) fillers into RGO, subsequently it can create a novel nanocomposite with improved structural and functional properties. The as-synthesized...
With the rapidly expanding use of nanoparticles in research and industry, the need to understand their potential for risk to population health is imperative. Current information on the effects of nanoparticles on living systems is limited, and this lack of knowledge has led to a global effort to define risk and improve the safety of nanoparticles. In this work, we elucidated the impact of gold nanoparticles...
Mechanical analysis in direct stamping of silver nano ink is simulated by a finite element model, Ansys. Stress distribution on the layer of silver nano ink is predicted while external pressure is applied onto the stamp. Compressive stress over the layer of silver nano ink is approximately the external pressure while higher stress is found at the both side-end of pattern trench. This compressive stress...
Using a modified magnetron sputtering technique, platinum nanoparticles having a mean diameter of 4–6 nm have been deposited on flexible polyimide substrates. The polyimide substrates have been previously patterned with gold interdigitated electrodes having an inter-finger distance of 10 μm using conventional photo lithography and the e-gun evaporation of gold. By controlling the nanoparticle deposition...
We propose a force sensor based on gold nanoparticles, which enable optical detection of force by measurement of the scattering light spectrum. Gold nanoparticles were dispersed on an elastomer sheet. The scattering spectrum changes due to strain were observed to investigate applicability of the sensor to force measurement. The force deforms the elastomer sensor body, and increases the interparticle...
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