Posts in Category Electrical Impedance Spectroscopy

Electrochemical Impedance Spectroscopy of Tap Water with the MFIA

on 06.01.2020 at 18:09 by Meng on Blog of Meng Li
Introduction Electrochemical impedance spectroscopy (EIS) is a popular non-destructive technique to characterize the physicochemical properties of materials, particularly at the solid-liquid (or electrode-electrolyte) interface. Despite the complexity of the measured data, EIS can be used to study many electrochemical devices […]

Permittivity Measurement with HF2IS Impedance Spectroscope

on 17.11.2015 at 12:47 by James Wei on Blog of James Wei
Introduction Dielectric spectroscopy is a form of impedance spectroscopy where the dielectric properties i.e. permittivity of a medium is characterized as a function of frequency. This technique allows us to evaluate the energy storage and dissipation properties of a capacitor […]

Characterization of Dye-Sensitized Solar Cell Impedance at Low Frequencies with HF2IS Impedance Spectroscope

on 03.07.2015 at 12:29 by James Wei on Blog of James Wei
Co-author and main contributor: Dr. Antonio Braga Introduction The electrical impedance spectroscopy (EIS) technique is used to characterize the physical-chemical processes of the dye-sensitized solar cells (DSSC) using different types of metal oxides semiconductors, dyes or electrolytes [1]. The EIS […]

Deep Level Transient Spectroscopy Using HF2LI Lock-in Amplifier

on 23.05.2015 at 10:58 by James Wei on Blog of James Wei
Co-author and main contributor: Dr. Antonio Braga Introduction A very small concentration of lattice point defects, or simply defects, such as vacancies, impurities, dislocations, grain boundaries or cavities, are responsible for creating many different properties in semiconductors. Defects play a crucial […]

Using HF2IS Impedance Spectroscope as a DC Impedance Meter

on 18.11.2014 at 11:11 by James Wei on Blog of James Wei
Up until now, the blogs related to impedance measurement are mostly related to how to setup a measurement and optimize the ac frequency sweeps. As a matter of fact, the HF2IS Impedance Spectroscope can also be used as a dc […]

Detecting a small fraction of impedance changes with improved sensitivity

on 16.09.2014 at 13:54 by James Wei on Blog of James Wei
Introduction There are normally two types of impedance measurement. The first type is the dynamic impedance measurement where impedance can change rapidly over time. This is the case in electrical impedance spectroscopy (EIS) in microfluidics for cell counting and cell discrimination […]

Taking Your Microfluidics EIS Measurement to the Ultra-High Frequency Domain

on 08.01.2014 at 13:28 by James Wei on Blog of James Wei
Introduction The HF2IS Impedance Spectroscope from Zurich Instruments is a versatile tool suitable for label-free electrical impedance spectroscopy (EIS) of single cells in the domain of cell counting and discrimination. The high frequency range, from DC to 50 MHz, and the […]

Express EIS Platform for Microfluidics

on 11.10.2013 at 14:07 by James Wei on Blog of James Wei
This blog is aimed for those interested in knowing more about setting up an electrical impedance spectroscopy (EIS) based on a microfluidic setup. In 2012 Zurich Instruments joined forces with Fluigent and Micronit by proposing an Electrical Impedance Spectrosocpy platform (EISP) […]