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Phthalocyanine Functionalized Hybrids as Receptors for Enhanced Gas/Bio Sensing

by: Al Palaniappan, Shabbir Moochhala, Francis E. H. Tay, Moawia O. Ahmed, Nicky C. L. Phua

edited by: Subhas C. Mukhopadhyay, Gourab S. Gupta

In Smart Sensors and Sensing Technology , Vol. 20 (2008), pp. 77-84.

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Abstract

Cobalt Phthalocyanine (CoPc) functionalized silica matrix has been tested as receptors for gaseous bio-markers detection. Bio-marker such as Nitric Oxide (NO) is identified and quantified by tetra amino phthalocyanine (CoTAPc) functionalized silica matrix. CoPc is anchored chemically on to a mesoporous silica network which is deposited on a Quartz Crystal Microbalance (QCM). Time of Flight Secondary Ion Mass Spectroscopy (Tof-SIMS) is used to characterize the CoPc/silica hybrids. The sensor response towards the bio marker is tested in a sealed gas chamber. The sensor response of QCM functionalized with CoTAPc and non-modified QCM is also recorded. The experiment results show that sensitivities up to 25 ppb/Hz could be achieved by using the developed CoTAPc/silica hybrid on QCM.


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