Electrochemical Instrumentation

Application Notes on Electrochemical Instrumentation

Potentiostats

Some of the notes below cover potentiostats in general and others are for Gamry Instruments systems specifically.  Click on a link below to download the PDF version of the Application or Technical Note.

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Film Growth Studied Using an eQCM

Posted by gamry on January 18, 2018

Among the uses for Gamry Instruments’ eQCM 10M electrochemical quartz crystal microbalance is studying film growth. Here is an example of film growth affecting electrochemical behavior of certain electrodes.

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Comprehensive cell impedance measurements using the Interface 5000E potentiostat’s dual electrometer

Posted by gamry on January 18, 2018

In this technical note, we look at the less well-known dual-electrometer feature in our Interface 5000E potentiostat. The dual electrometer allows the user to make a second voltage measurement in addition to the one made by the potentiostat.

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Understanding iR Compensation

Posted by gamry on January 16, 2018

Some initial background information describes the general issue of iR errors. This application note presumes that you have a basic understanding of potentiostat operation.

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The Value of Stack Mode Measurements

Posted by gamry on July 17, 2017

Some researchers want to be able to apply or measure voltages larger than 12 V. One example of the need for larger potentials is battery testing, while another might be CV inside small microfluidic channels.

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Understanding the Specifications of your Potentiostat

Posted by gamry on October 21, 2015

This technical note is intended to help you better understanding the specifications of potentiostats. Various parameters that are typically listed in specification sheets of potentiostats are explained. In addition, it is shown which parameters are more relevant for specific applications and where you should pay attention.

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Measuring the Optical Power of your LED

Posted by gamry on February 27, 2015

In order to calculate the efficiency of a solar cell, the optical power of the incident light has to be known. This technical note explains how to measure and calculate the optical power of your light source.

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Calibration of an Au-coated Quartz Crystal

Posted by gamry on October 13, 2014

electrode and then oxidize Cu back off using the result to calculate a calibration factor for the crystal.

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Tips and Techniques for Improving Potentiostat Stability

Posted by gamry on July 16, 2014

This application note provides several tips and techniques for improving potentiostat stability. Potentiostats can become unstable and improving the stability may require trying several different techniques.

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Measurement of Small Electrochemical Signals

Posted by gamry on July 15, 2014

Potentiostats are often required to work near the limits of their measurement ability. The Gamry Instruments Reference 600 can resolve current changes. Measurements of small currents place demands on the instrument, the cell, the cables, and the experimenter. Many of the techniques used in electrochemistry of larger currents must be modified when used to measure pA and fA currents. In many cases, the basic physics of the measurement must be considered.

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Potentiostat Fundamentals

Posted by gamry on August 2, 2013

A potentiostat is an electronic instrument that controls the voltage difference between a Working Electrode and a Reference Electrode. Both electrodes are contained in an electrochemical cell. The potentiostat implements this control by injecting current into the cell through an Auxiliary or Counter electrode.

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