Abstract
QCM Gas Sensor with Organic Nanowire Film as Molecular Recognition Membrane
Highlights
A quartz crystal microbalance (QCM) can be a sensitive mass measuring device in nanogram levels because of the fact that the resonant frequency changes upon the deposition of a given mass on the electrode of the QCM
We show a QCM gas sensor with molecular recognition membrane (MRM) fabricated by the nanosize particle-beam irradiation technique.(3) It was found that the QCM sensor with polyacrylic acid MRMs exhibits excellent selectivity for ammonia gas.(2) It is confirmed that the sensitivity of the QCM sensor with nanowires of poly-acrylic acid MRM is higher than that of the sensor with a common poly-acrylic acid MRM. *Corresponding author: e-mail: takei@neptune.kanazawa-it.ac.jp
We demonstrated a novel QCM gas sensor with nanowires of MRM, which is fabricated by the nanosize particle-beam irradiation technique
Summary
A quartz crystal microbalance (QCM) can be a sensitive mass measuring device in nanogram levels because of the fact that the resonant frequency changes upon the deposition of a given mass on the electrode of the QCM. The QCM coated with synthetic polymer films has been investigated for use as a gravimetric gas sensor capable of detecting various gases.(1) These types of gas sensor can be characterized using coated polymer films, which we call the film molecular recognition membranes (MRMs).(2). We study the influence of the functional group of MRM on the gas sensing characteristics of the QCM gas sensor. The relationship between the functional group contained in the MRM and gas sensitivity was considered in the previous work.(2) Here, the fluoro functional group is investigated, and it shows that the MRMs with the functional group are sensitive to aldehyde gases
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