Surface Analytical Techniques Flashcards
what analytical technique is used to monitor the binding of host-guest molecules on surface
real time surface analytical techniques
two types of real time surface analytical techniques
quartz crystal microbalance (QCM) and surface plasmon resonance (SPR)
what does a qcm consist of
thin layers of gold electrode on both sides of quartz
what kind of material is quartz
piezoelectric
what does a qcm do
measure the mass change on surface
minimum mass change detected by qcm
1 ng/cm2
what signal is applied on the two electrodes of a qcm
ac signal
what is scanned in a qcm and centered at the MHz level
frequency of the ac signal
what frequency is measured
resonance frequency
what does the frequency in qcm depend on
thickness of the quartz
how is the noise reduced at MHz level using qcm
faraday box
