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Bang JunSung1 Oh Soong Ju1 Junhyuk Ahn1 Ho Kun Woo1

1, Nanocrystal Electronics Laboratory, Korea University, Seoul, , Korea (the Republic of)

We introduce a strategy to design a highly sensitive temperature sensors using Silver (Ag)
nanocrystal (NC) thin films. Resistive temperature sensors were fabricated on using
poly(dimethylsiloxane) (PDMS) substrate through ligand exchange process [1] and interfacial
engineering process. We take advantages of high thermal expansion coefficient of PDMS to
control the interparticle distances of Ag NCs, and eventually to improve the sensitivity. We
achieved a very sensitivity with temperature coefficient of resistance of 0.1/K. We discussed
the origin of the high sensitivity by investigating structural, chemical, electrical, and
electromechanical properties as well as the charge transport mechanisms. We also examine
the stability, reliability, and sensitivity of our sensors. This work offers and effective way to
design low-cost and high-performance sensors.

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