Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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Construction of Low Noise Electrochemical Quartz Crystal Microbalance

  • Published : 19960100
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Abstract

A new oscillator for electrochemical quartz crystal microbalance (EQCM) was developed by using an operational amplifier without any LC component. The home-made EQCM using this oscillator showed only 0.02 Hz frequency noise at 0.3 s gate time when a 6 MHz AT-cut crystal was used. Pb underpotential deposition on gold substrate in nitric acid media was examined to demonstrate the performance of this EQCM. The derivative of frequency change could be obtained without averaging multiple scans.

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References

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