New ink gives pressure sensitivity to touch sensitivity electronic surfaces
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The paper covers a screen-printed functional ink, comprising a combination of semiconducting acicular particles, electrically insulating nanoparticles and a base polymer ink, is described that exhibits pronounced pressure sensitive electrical properties for applications in sensing and touch sensitive surfaces. The combination of these components in the as-printed ink yield a complex structure and a large and reproducible touch pressure sensitive resistance range. The physical basis for conduction, particularly in the low pressure regime, can be described in terms of field assisted quantum mechanical tunneling.
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