Quartz crystal microbalance coated with poly-L-proline self-assembly layer to detect organic gases

Muhamad Mat Salleh; Akrajas Ali Umar; Muhammad B. Yahaya

doi:10.1117/12.522746

2 April 2004 Quartz crystal microbalance coated with poly-L-proline self-assembly layer to detect organic gases

Muhamad Mat Salleh, Akrajas Ali Umar, Muhammad B. Yahaya

Proceedings Volume 5276, Device and Process Technologies for MEMS, Microelectronics, and Photonics III; (2004) https://doi.org/10.1117/12.522746
Event: Microelectronics, MEMS, and Nanotechnology, 2003, Perth, Australia

Abstract

A gas sensor system using the assembled molecular layer of poly amino acid derivative, poly-L-proline has been developed. The thin layer was prepared using self assembly technique which was deposited onto a quartz crystal microbalance (QCM) substrate. The QCM coated self-assembly monolayer (SAM) was used to detect the presence of two vapor samples; saturated vapor of acetone and 2-propanol. The sensing sensitivity was based on the change in the fundamental frequency of the QCM upon exposure towards gas sample. It was found that the SAM-coated QCM sensor system was sensitive towards the vapor samples by reducing its fundamental frequency. It was also found that the SAM exhibited a good stability and reproducibility behaviors.

Citation Download Citation

Muhamad Mat Salleh, Akrajas Ali Umar, and Muhammad B. Yahaya "Quartz crystal microbalance coated with poly-L-proline self-assembly layer to detect organic gases", Proc. SPIE 5276, Device and Process Technologies for MEMS, Microelectronics, and Photonics III, (2 April 2004); https://doi.org/10.1117/12.522746

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