ELECTROCHEMISTRY

Standard System
This schematic figure shows a classic setup for an electrochemical measure system build up by a potentiostat/galvanostat with three electrodes: the working, the counter and the reference, all of them dipped into the solution to analyze.

Thanks to this configuration it is possible to perform several electrochemical measures giving information about the redox reactions linked to the electrical charge transfer.

System with EUREKA EQCM

Eureka can be easily integrated into your electrochemical measure system, in fact it is enough to use Eureka as the container for the chemical solution and to connect the cable of the working electrode to the Eureka instrument.

With this configuration the working electrode is the quartz crystal electrode dipped into the chemical solution.

Eureka is easily and immediately integrated in every electrochemical measure system, it gives in real time an exact information about the mass changes that take place on the Working electrode during the electrochemical process. During the experiment the user will appreciate at the same time the information about the redox reactions and the mass change

GASES ANALISYS
Eureka provides precious information about the affinity reactions that take place in gaseous phase, you need only to insert on its base the measure cell for gases that contains the crystal quartz coated with a suitable sensible film to detect the substance of interest.

The gas flows through the measure cell, containing the quartz crystal, thanks to two suitable hydraulic plugs.

Eureka provides precious information about the mass variation due to the reaction affinity between the sensible film coated on the quartz crystal and the gas compound flowing into the cell.

INVESTIGATION ABOUT THE FILM DEPOSITION
Eureka can be easily employed to determinate the mass of thin films stripped, grown or layered on the quartz crystal surface.

Eureka can be easily integrated in a metal evaporator system, that's enough to insert the quartz crystal into the evaporator chamber to obtain real time information about the deposition process.

Another measure technique consist in the determine the resonance frequency of the quartz crystal before the deposition process, then you can remove the quartz crystal from the measure base to deposit a film on it, finally measuring again the quartz resonance frequency, the resonant frequency change gives information about the film mass.

INVESTIGATION ABOUT THE LIGHT STIMULATION
Eureka can be easily employed to characterize the interaction between the light stimulation and the chemical bond energy.

After having coated the quartz crystal with the chemical compound to investigate, you can start the light stimulation that breaks the chemical bonds with a resulting mass variation, Eureka provides real time careful information about the mass change, if you work with harmful compounds it is possible to employ a suitable transparent measure cell, built using transparent material as Plexiglass.

With this method of measure you can study several other kinds of stimulations, beyond the light one, that causes the breaking of chemical bonds.

BIOLOGICAL APPLICATIONS
Eureka can be easily employed to study the interaction between biological molecules, such as the antigen-antibody, the protein-protein bounds, the complementary DNA/RNA strands interactions, aptamer-ligand, enzyme-subtrate, etc.

After having coated the quartz crystal with the "target" molecule to investigate, Eureka provides real time careful information about the mass change corresponded to the molecular interaction.

This system is applicable to many fields, such as pathological diagnostic, both in specific antibody search, and genetic mutations analysis, toxic metabolites search in alimentary or environmental samples, specific bacteria presence search in limited atmospheres.

OTHER FIELDS OF APPLICATION
Eureka is a very flexible instrument because it can be employed, in all the experiments and applications, to determinate the mass variation on the quartz crystal electrode.