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Quartz Crystal Microbalances (QCMs)

This page lists some groups that do research on QCMS and some companies that sell QCMs and related products. It is incomplete. If your favorite researcher or company has been omitted, please feel free to tell me so.
You can find some information about QCMs and terminology here.

Researchers

E. Benes
Wrote on general theory of multiple layered stacks with one or more piezoelectric layers. Now developing viscosity sensor.
Center for Polymer Interfaces and Macromolecular Assemblies
Multiple projects; tools include QCM.
The Materials adherence experiment
on Pathfinder used used QCMs to measure how dusty Mars is.

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Vendors

AVL
They make GaPO4 crystals which can be used in thickness monitors like quartz crystals, but which can work at much higher temperatures.
California Measurements, Inc.
QCMs to detect particles and aerosols.
CH Instruments
Products include a PC controlled time resolved electrochemical quartz crystal microbalance (EQCM). The frequency is compared to that of a reference oscillator.
Fortiming Corporation
Products include quartz crystals for use in sensors (to be coated by user), crystals for use with microprocessors, and oscillators for use in communications.
Initium
They make 27 MHz QCM sensors that work in a reaction bath. The QCM can be coated with proteins; as molecules bind to the proteins the QCM's frequency drops.
International Crystal Manufacturing
QCM related products include custom crystals, oscillators, and liquid flow cells.
Intellemetrics
Thin Film Process Control. (Thickness monitors and controllers.)
Leybold Inficon
Products include a big line of thickness monitors. Offers "z-match" algorithm.
Masscal Corporation
Their combination QCM / heat conduction calorimeter monitors reactions between gasses and solid films.
Maxtek
Now part of Inficon. Products include QCM equipment for electrochemical use.
Princeton Applied Research
They sell a QCM designed primarily for electrochemical use.
QuartzPro AB
They make crystals and oscillators, including custom orders.
Quartz Technology Limited
Products include quartz crystal sensor arrays (sniffers).
QCM Research
Products include QCMs for use in space.
Q-Sense
Products include QCM that are hit with an electrical impulse after which the "ring-down" is recorded. This allows both the frequency and the damping factor to be recorded. Sells equipment for use in liquids.
Resonant Probes GmbH
Sells a combined analysis of impedance as a function of driving frequency of QCM and Surface Plasmon spectrocopy.
Seiko EG&G
They apparently sell electrochemical quartz cystal microbalances.

Sigma Instruments
Now part of Inficon. Products include thickness monitors and controllers.
Stanford Research Systems
Offers a QCM which can be used as an electrochemical QCM, can be used in viscous liquids, and can be used with polymer films.
Sycon Instruments
Products include thickness monitors and controllers.
Tangidyne
Products include quartz crystals for electrochemical QCMs, liquid monitoring and thickness monitors, and gallium phospate crystals for high temperature use.
TechnoBiochip
Products include electrochemical quartz microbalance, a quartz nanobalance for use in fluids, and a "nose" based on quartz crystal microbalances.
Tectra
Thickness monitors.
Testbourne Ltd.
Thin film deposition monitors, rate controllers, instruments for monitoring & controlling plating and etching in liquids, and sensor crystals.
Universal Sensors Inc.
They sell quartz crystals with coatings, such as antibodies, that absorb only particular chemicals. They thus let QCMs become sensitive detectors of those chemicals
ValpeyFisher
Products include many kinds of crystals including quartz crystals. Offers information on quartz resonators and other topics after log-in.
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This page was last changed / fiddled with / fixed on July 1, 2009.

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To get my e-mail address, replace "at" with "@" & remove the spaces:
christopher e reed at cs . com

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