• A Friend We Will Miss – Honoring Professor Dennis Johnson

    This past year, on March 11, 2019, Professor Dennis C. Johnson of Iowa State University passed away.  His passing deeply saddens the Pine Research team as Dennis played an integral part in our early efforts to develop electrochemical instrumentation.   In the mid-1960s, Dennis was a graduate student and part of Professor Stanley Brukenstein’s team of electrochemists at the University of Minnesota who were doing novel research on the theory and application of rotating ring-disk electrodes (RRDEs).  The Minnesota team (which also included fellow graduate student Duane Napp and visiting scientist John Albery from Oxford University) was building upon earlier RRDE research performed in Russia, and the team’s efforts helped launch the RRDE as one of the primary tools for modern electroanalytical research.

    Dennis Johnson at Pine Research Booth

    Dennis Johnson at Pine Research Booth

    In subsequent years, Dennis and Duane collaborated with the owner of Pine Instrument Company, Ted Hines, to construct several early RRDE instruments.  Dennis and Duane also worked with Ted in the design and commercialization of a special bipotentiostat circuit which allowed independent control of the disk and ring potentials.  After Dennis became a professor at Iowa State University, he and his graduate students remained directly involved in the commercial production of rotating electrodes, playing a key role in the area of quality control.  As demand for rotating electrodes increased, it remained important that each individual rotating electrode be inspected and tested by a qualified electrochemist.  Dennis and his students at Iowa State did much of this early testing, and to this very day, rotating electrodes from Pine Research are tested according to his methods in some cases, these tests are still performed by scientists who were originally trained in his laboratory.

    Dennis Johnson’s contributions to Pine cannot be overstated, and Pine remains close with the Johnson family and with several Johnson group alumni.  Dennis will be sorely missed, not just by his family and the students whose lives he touched, but also by the entire team here at Pine.  We would not be where we are today without all of the help we received from Dennis over the many years.

    Below you can find a link to an official obituary as well as to an Iowa State University biography of Dennis Johnson highlighting his academic career.!/Obituary

    A history of the development of the Rotating Ring-Disk Electrode and the role played by Dennis Johnson can be found in the following Interface magazine article published by the Electrochemical Society (ECS):

    Finally, Dennis left us with a timeless and wonderful piece of written encouragement and advice which can be found on the Society for Electroanalytical Chemistry (SEAC) website at the link below:


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  • Let’s solve problems together!

    Pine Research is a team of scientists and engineers who want to solve problems with other scientists and engineers.  We are successful when you are successful.  For those of you performing cutting edge research, let us know how we can help you.

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  • The Perfect Pair?

    Perfect Pair Winter Interface 2018

    Advertisement from the Winter 2018 Edition of the ECS Interface magazine


    We hope that you enjoy a wonderful holiday season with your friends and family!

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  • Exciting Electrochemistry at MRS Boston

    The upcoming Fall MRS Meeting in Boston will certainly not disappoint the electrochemical science crowd.  It is exciting to see how extensive the use of electrochemistry has become for the materials sciences areas, namely those in energy transfer, storage, and conversion and in materials characterization and production.

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  • New Electrochemical Paradigms – What are you Researching?

    The electrochemical scientists at Pine Research, while perhaps a bit biased, find electrochemsitry to be one of the most progressive and popular areas of materials engineering and analytical science.  On occasion, we hear the phrase, “haven’t you discovered all there is to know about electrochemistry back in the 1960’s?”  Indeed, some may not be aware of the recent renaissance of electrochemical science in the past decade.  As the world demands high capacity and high-efficiency power systems (batteries, solar cells/photovoltaics, fuel cells, artificial photosynthesis, etc.) that are as sustainable and green as possible, the modern scientist who may not have been aware of electroanalytical chemistry are now finding it an essential component of their research program.

    Crystal structure of alpha manganese oxide

    Crystal structure of alpha manganese oxide, studied for the new Unified Electrochemical Band-Diagram Framework (UEB) model (credit: Argonne National Laboratory).

    A recent article in ScienceDaily is quite intriguing [1].  In it, the author describes that existing understanding of complex electrochemical systems relies on solid mathematical models; yet, these models do not provide a comprehensive understanding commonly observed behavior in electrochemical systems.  Namely, in semiconductor applications (e.g., photoelectrochemistry and supercapacitors), the existing electrochemical models fail to explain complex mechanisms of the materials used, which have unique properties not captured by existing models.  Researchers at Argonne National Laboratory have published an article describing a new model for understanding the materials used in electrochemical systems:  The Unified Electrochemical Band Diagram Framework, published in the Advanced Functional Materials [2].

    2018 Midwest Regional ACS Meeting

    Visit Pine Research at the 2018 Midwest Regional ACS Meeting at Iowa State University in Ames, IA from 21 – 23 October 2018!

    At Pine Research, we are eager to learn about your new discoveries.  How has electrochemistry shaped and informed your research?  What accomplishments in the field have you made?  Come tell us all about it!  We will be exhibiting at the upcoming Midwest Regional ACS Meeting at Iowa State University in Ames, Iowa (October 21 – 23, 2018).  Share your research with us and learn about our products that might support your electrochemical research.  We will have our new WaveDriver 200 Integrated Bipotentiostat (with electrochemical impedance spectroscopy, EIS) and the WaveVortex 10 Electrode Rotator for you to explore.  See you soon – and enjoy the article!



    [1] DOE/Argonne National Laboratory. “Electrochemistry: Greater than the sum of its parts.” ScienceDaily. (accessed October 15, 2018).

    [2] Young, M.J.; Holder, A.M.; Musgrave, C.B.  The Unified Electrochemical Band Diagram Framework: Understanding the Driving Forces of Materials Electrochemistry. Advanced Functional Materials, 2018, 1803439. (DOI: 10.1002/adfm.201803439)

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