DUAL QUARTZ-CRYSTAL MICROBALANCE

被引：39

作者：

DUNHAM, GC ^{[1
]}

BENSON, NH ^{[1
]}

PETELENZ, D ^{[1
]}

JANATA, J ^{[1
]}

机构：

[1] PACIFIC NW LAB, ENVIRONM MOLEC SCI LAB, RICHLAND, WA 99352 USA

来源：

ANALYTICAL CHEMISTRY | 1995年 / 67卷 / 02期

关键词：

D O I：

10.1021/ac00098a005

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Construction and performance of a dual quartz crystal microbalance is described. The final probe has a dipstick configuration that is particularly suitable for sensing and monitoring applications in viscous and/or conducting liquids. The differential (heterodyned) frequency measurement substantially eliminates the deleterious effects of viscosity, temperature, and conductivity. The corresponding performance coefficients are temperature df/dT = 1.5 Hz/degrees C, viscosity df/d eta(L) = 103 Hz/cP, and conductivity df/dM = 108 Hz/M, where conductivity is expressed in terms of molarity of sodium chloride. As an example, the etching of a 2000-Angstrom-thick layer of aluminum has been monitored as a function of time.

引用

页码：267 / 272

页数：6

共 14 条

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