Institute of Semiconductor Physics SB RAS, Novosibirsk, Russia.
Langmuir. 2009 Oct 20;25(20):12195-200. doi: 10.1021/la901725f.
Application of the threshold mode allowed us to use the quartz resonator (quartz crystal microbalance, QCM) as a highly sensitive gas sensor measuring the forces of the rupture of adsorbed gas components from the resonator surface oscillating with increasing amplitude. This procedure allows one to analyze different gas components using the same surface modification, just varying the rupture threshold by varying the amplitude of shear oscillations. The sensitivity of the threshold measurements is 2 to 3 orders of magnitude higher than for the gravimetric procedure. It is demonstrated that the QCM operating as an active element can be used as a gas sensor. This procedure seems to be promising in investigating the reactivity of the surface or the interactions of gaseous components with the surface containing various functional groups, thus contributing to the surface chemistry.
阈值模式的应用使我们能够将石英谐振器（石英晶体微天平，QCM）用作高灵敏度的气体传感器，测量从谐振器表面振动的吸附气体成分的断裂力，该谐振器的振幅逐渐增大。该程序允许使用相同的表面修饰来分析不同的气体成分，只需通过改变剪切振动的幅度来改变破裂阈值。阈值测量的灵敏度比重量法高 2 到 3 个数量级。已经证明，作为有源元件的 QCM 可以用作气体传感器。该程序在研究表面的反应性或气态成分与含有各种官能团的表面的相互作用方面似乎很有前途，从而有助于表面化学。
