Liquid crystal temperature sensor based on a micrometric structure and a metallic nanometric layer

Algorri Genaro, José Francisco and Urruchi del Pozo, Virginia and Bennis, Noureddine and Sánchez Pena, José Manuel (2014). Liquid crystal temperature sensor based on a micrometric structure and a metallic nanometric layer. "IEEE Electron Device Letters", v. 35 (n. 6); pp. 666-668. ISSN 0741-3106. https://doi.org/10.1109/LED.2014.2314682.

Description

Title: Liquid crystal temperature sensor based on a micrometric structure and a metallic nanometric layer
Author/s:
  • Algorri Genaro, José Francisco
  • Urruchi del Pozo, Virginia
  • Bennis, Noureddine
  • Sánchez Pena, José Manuel
Item Type: Article
Título de Revista/Publicación: IEEE Electron Device Letters
Date: June 2014
ISSN: 0741-3106
Volume: 35
Subjects:
Freetext Keywords: Temperature sensors, thin film sensors, liquid crystals, microstructure
Faculty: E.T.S.I. Telecomunicación (UPM)
Department: Tecnología Fotónica [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

This letter presents a novel temperature sensor, which consists of an interdigitated comb electrode structure with a micrometric-scale size, nanometric metallic layer, and nematic liquid crystal (NLC) film. This sensor exploits the permittivity dependence of the NLC with temperature and principle of electrical conductivity above the percolation threshold in thin film metallic layers. The latter has been demonstrated to increase the temperature sensitivity considerably. The high impedance input reduces the power dissipation, and the high enough voltage output makes it easy to measure the output signal with high precision. The operation principle and fabrication process as well as the characterization of the temperature sensor are presented. Experimental results show that the device offers a sensitivity of 9 mV/°C and is dependent on the applied voltage. This is six times greater than the same structure without the use of a nanometric layer.

More information

Item ID: 35857
DC Identifier: http://oa.upm.es/35857/
OAI Identifier: oai:oa.upm.es:35857
DOI: 10.1109/LED.2014.2314682
Official URL: http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=6798692
Deposited by: Memoria Investigacion
Deposited on: 27 Jun 2015 09:54
Last Modified: 27 Jun 2015 09:54
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