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October 15, 2014

VIP: Non-Invasive Probing of Nanoparticle Electrostatics

Dr. Kristina Tschulik, Dr. Wei Cheng, Dr. Christopher Batchelor-McAuley, Stuart Murphy, Dr. Dario Omanović and Prof. Dr. Richard G. Compton

Non-Invasive Probing of Nanoparticle ElectrostaticsNot what you might think: A new and non-invasive technique to probe the electrostatic interaction between surface-charged nanoparticles and a charged metal/solution interface shows that electrostatic effects are insignificant in all but very dilute electrolytes.

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  1. Theory of Microwell Arrays Performing as Generators–Collectors Based on a Single Bipolar Plane Electrode

    Dr. Alexander Oleinick, Dr. Jiawei Yan, Prof. Dr. Bingwei Mao, Prof. Dr. Irina Svir and Prof. Dr. Christian Amatore

    Article first published online: 4 SEP 2015 | DOI: 10.1002/celc.201500321

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    Unbiased and efficient: Plane-recessed disk-electrode arrays are extremely useful for sensing purposes, even when the top-plane electrode is not biased. This theoretical study provides insights into the bipolar performance of such systems and shows that rational design may allow their optimization for a broad range of experimental conditions.

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    Xiaoling Zhong, Weiyong Yuan, Yuejun Kang, Jiale Xie, Fangxin Hu and Chang Ming Li

    Accepted manuscript online: 4 SEP 2015 02:17AM EST | DOI: 10.1002/celc.201500351

  3. Cyclic Voltammetry of Electrocatalytic Films: Fast Catalysis Regimes

    Prof. Dr. Cyrille Costentin and Prof. Dr. Jean-Michel Savéant

    Article first published online: 3 SEP 2015 | DOI: 10.1002/celc.201500217

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    Fast and furious: The interplay between catalytic reaction, diffusive permeation of the substrate, and diffusion-like transport of charge is analyzed for fast catalytic reactions as a function of two dimensionless parameters. These analyses also provide bases for the rational benchmarking of catalysts.

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    Rajiv Prakash, Ashish Kumar and Madhu Tiwari

    Accepted manuscript online: 3 SEP 2015 03:30AM EST | DOI: 10.1002/celc.201500318

  5. Comparison of Cyclic and Square Wave Voltammetry of Irreversible EC Mechanisms

    Lara Čižmek, Dr. Šebojka Komorsky-Lovrić and Dr. Milivoj Lovrić

    Article first published online: 2 SEP 2015 | DOI: 10.1002/celc.201500309

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    A theoretical model of EC mechanisms that consist of a reversible electrode reaction and a totally irreversible chemical reaction is developed for cyclic and square wave voltammetry. Simulation of square wave voltammograms for frequencies of 33 Hz (broken line) and 100 Hz (solid line) demonstrates the possibility that there is a critical frequency below which the response is small and apparently irreversible and above which it is high and appears reversible.