Description of the instrument

The QCA922 is an instrument developed to perform piezoelectric gravimetric measurements ranging from μg to ng. This makes it possible to follow both the frequency and the resonance resistance of a quartz crystal (AT cut) covered with Pt, Au or C. The resonance frequency varies depending on the mass present on the surface of the crystal , while the resonance resistance varies according to the viscosity of the liquid in contact with the surface of the quartz crystal. The QCA922 covers a wide range of applications, but was mainly developed for applications where it is used in parallel with a potentiostat / galvanostat in order to be used as an electrochemical quartz crystal microbalance (EQCM).

With the addition of a potentiostat / galvanostat, the QCA922 system (with a resonator covered with Pt, Au or C serving as working electrode) can simultaneously provide information on the potential, the current, the load, the frequency of resonance (mass), and resonance resistance (viscosity). This allows researchers to analyze electrochemical deposits, the formation of polymer films on electrodes, corrosion, adsorption and electrochemical reaction mechanisms. other fields of application relate to research on batteries, electroplating and the development of biosensors.

Model : Princeton Applied Research, QCA922
Room : CB-2480