Naslov
Contactless Optical Chemical Sensor

Autori
Steinberg, Matthew ; Murković Steinberg, Ivana ; Patljak, Željko

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Skup
Cambridge Wireless Academic and Industry SIG “ The Future of Wireless – An Academic Question”

Mjesto i datum
Cambridge, Ujedinjeno Kraljevstvo, 14. 05. 09

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
wireless sensors; pH indicator; sol-gel thin films; RFID

Sažetak
The fusion of chemical and biosensor technologies with short-range wireless technologies is creating new opportunities for sensor network applications in healthcare, environmental monitoring, process and quality control, and chemical and biological threat detection. We are integrating physical, chemical and biosensors onto custom RFID tags compatible with the ISO15693 smartcard protocol. This poster describes a new thin-film chemical sensor developed on a high-frequency (HF) radio-frequency (RF) tag for the optical determination of pH. The tag contains a thin-film of a pH-sensitive indicator dye, and a dual wavelength reflectance spectrophotometer that exploits the differential absorbance of light in the immobilised thin-film as it reversibly changes colour between protonated and deprotonated states. The sensor is responsive over the range from 5.2 – 8.3 pH units. Because the wireless system is based on the ISO standard HF RFID platform, it could in future be suitable for use as a chemical and biological detector in different industries where this standard has been adopted. By adapting and modifying the specific chemistry and optoelectronic detector measurement strategy, the platform could be deployed for different chemical and biological analytes, in addition to just pH. Future applications of the RF sensor tag may include mobile and wearable sensor badges for personal chemical and biological exposure and contamination monitoring, woundcare management, to longer-term in-situ monitoring around commercial premises, large-scale civil engineering structures, and industrial manufacturing plants.

Izvorni jezik
Engleski

Znanstvena područja
Kemija, Elektrotehnika, Kemijsko inženjerstvo

POVEZANOST RADA