Electrochemical and electrical

    Electrochemical Analyzer

    General use potentiostat capable of performing many common coulometric and voltametric measurements. These techniques include cyclic voltammetry, square wave voltammetry, and chronocoulometry.

    CH Instruments 620B

    • Variety of electrode and cells available
    • Picoamp sensitivity
    • Potential scan range of ±10 V

    Contact: Aric Opdahl


    Electrical Characterization

    Jandel RM3000 Four-point Probe System

    • Multi-height probe stand to accommodate samples up to 250 mm thick
    • 100 um and 300 um tip diameter, linear array probe heads
    • Measurement range of 1 mΩ/□ to 500 MΩ/□
    • Current source range 10 nA to 99.99 mA
    • Measured voltage range 0.01 mV to 1250 mV

    Contact: Seth King


    HP 4140b pA Meter/DC Voltage Source

    • I-V and C-V measurements
    • Computer controlled with LabView software
    • Dark box and UV laser for photocarrier voltammetry

    Contact: Seth King


    Quartz Crystal Microbalance (QCM)

    QCM is generally used to study adsorption behavior, including biomolecular interactions. The basis of the QCM is a piezoelectric quartz crystal sensor which oscillates at a resonance frequency in the MHz region. The exact frequency is determined by several factors, including the mass of the sensor. Increases in the mass of the sensor as a result of adsorption are observed as a reduction in the oscillation frequency.

    Stanford Research QCM 100

    • QCM crystals available with wide range of coatings
    • Pico- to nanogram changes in mass detectable
    • Can be used with CH instruments potentiosat to perform E-QCM measurements

    Contact: Aric Opdahl


    Scanning Tunneling Microscope (STM)

    Similar to AFM, but relies on changes in current to look at the surface, rather than changes in force.

    Agilent 4400

    • Imaging in atmosphere, inert gas, or solution environments
    • Atomic resolution

    Contact: Seth King