Anomalous Diffusion of Electrically Neutral Molecules in Charged Nanochannels

Authors

  • Dr. Wei Chen ,

    1. Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093 (China)
    2. Permanent address: Department of Pharmaceutical Analysis, School of Pharmacy, Fujian Medical University, Fuzhou 350004 (China)
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  • Dr. Zeng-Qiang Wu,

    1. Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093 (China)
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  • Prof. Xing-Hua Xia,

    1. Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093 (China)
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  • Prof. Jing-Juan Xu,

    1. Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093 (China)
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  • Prof. Hong-Yuan Chen

    1. Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093 (China)
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  • This work was financially supported by the National Basic Research Program (2007CB714501, 2007CB936404), the National Natural Science Foundation of China (21035002, 20828006, 20890020, 20975047), and the National Science Fund for Creative Research Groups (20821063).

Abstract

original image

Eingeschränkte und freie Diffusion von Phenol treten in der EDL-Region (EDL: elektrische Doppelschicht) bzw. jenseits davon in den Nanokanälen von porösem anodischem Aluminiumoxid auf (siehe Bild). Der induktive Effekt des elektrischen EDL-Feldes auf die Phenolmoleküle verlangsamt deren Diffusion, ist aber vernachlässigbar in der Region freier Diffusion. Die Ausdehnung beider Regionen hängt von der EDL-Dicke ab; damit wächst der Diffusionsfluss bei steigender Ionenstärke des Elektrolyten.

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