Integrated luminescent chemical microsensors based on GaN LEDs for security applications using smartphones

Orella Moraleda, Guillermo and Muñoz Merino, Elias and Gil Herrera, Luz K. and Muñoz Galindo, Pablo and López Gejo, Juan and Palacio Orcajo, Carlos (2012). Integrated luminescent chemical microsensors based on GaN LEDs for security applications using smartphones. In: "Proceedings of SPIE. Optical Materials and Biomaterials in Security and Defence Systems Technology IX", 24/09/2012, Edinburgh, United Kingdom.

Description

Title: Integrated luminescent chemical microsensors based on GaN LEDs for security applications using smartphones
Author/s:
  • Orella Moraleda, Guillermo
  • Muñoz Merino, Elias
  • Gil Herrera, Luz K.
  • Muñoz Galindo, Pablo
  • López Gejo, Juan
  • Palacio Orcajo, Carlos
Item Type: Presentation at Congress or Conference (Article)
Event Title: Proceedings of SPIE. Optical Materials and Biomaterials in Security and Defence Systems Technology IX
Event Dates: 24/09/2012
Event Location: Edinburgh, United Kingdom
Title of Book: Proceedings of SPIE. Optical Materials and Biomaterials in Security and Defence Systems Technology IX
Date: 2012
Volume: 8545
Subjects:
Freetext Keywords: Chemical sensors, luminescence, gas detection, GaN LEDs, smartphone, advanced materials, surface functionalization, ruthenium complexes
Faculty: E.T.S.I. Telecomunicación (UPM)
Department: Ingeniería Electrónica
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

Development of PCB-integrateable microsensors for monitoring chemical species is a goal in areas such as lab-on-a-chip analytical devices, diagnostics medicine and electronics for hand-held instruments where the device size is a major issue. Cellular phones have pervaded the world inhabitants and their usefulness has dramatically increased with the introduction of smartphones due to a combination of amazing processing power in a confined space, geolocalization and manifold telecommunication features. Therefore, a number of physical and chemical sensors that add value to the terminal for health monitoring, personal safety (at home, at work) and, eventually, national security have started to be developed, capitalizing also on the huge number of circulating cell phones. The chemical sensor-enabled “super” smartphone provides a unique (bio)sensing platform for monitoring airborne or waterborne hazardous chemicals or microorganisms for both single user and crowdsourcing security applications. Some of the latest ones are illustrated by a few examples. Moreover, we have recently achieved for the first time (covalent) functionalization of p- and n-GaN semiconductor surfaces with tuneable luminescent indicator dyes of the Ru-polypyridyl family, as a key step in the development of innovative microsensors for smartphone applications. Chemical “sensoring” of GaN-based blue LED chips with those indicators has also been achieved by plasma treatment of their surface, and the micrometer-sized devices have been tested to monitor O2 in the gas phase to show their full functionality. Novel strategies to enhance the sensor sensitivity such as changing the length and nature of the siloxane buffer layer are discussed in this paper.

More information

Item ID: 20362
DC Identifier: http://oa.upm.es/20362/
OAI Identifier: oai:oa.upm.es:20362
Official URL: http://proceedings.spiedigitallibrary.org/proceeding.aspx?articleid=1393399
Deposited by: Memoria Investigacion
Deposited on: 02 Oct 2013 17:11
Last Modified: 21 Apr 2016 23:06
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