Open Source Quartz Crystal Microbalance with dissipation monitoring
作者： C Mista , M Zalazar , A Peñalva , M Martina , J M Reta
DOI: 10.1088/1742-6596/705/1/012008
关键词:
摘要: The dissipation factor and subsequently the characterization of viscoelasticity deposition films have become crucial for study biomolecular adsorption. Most commercial quartz crystal microbalance (QCM) systems offer this feature, but it has not been incorporated in open source systems. This article describes design, construction, simulation an QCM module measuring factor. includes two blocks: switch envelope detector. rapidly disrupts excitation crystal, connects output to detector which demodulates amplitude signal. Damped sinusoidal exponential signals with different time constant were used simulating viscosity interfaces. incorporation few elements facilitated a double-faced PCB design reduced dimensions. results from show that system good performance range processes; greater relative error are observed lower than 1 us. In conclusion, developed calculate using QCM, is compact shows great use
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