Cellulose ionics: switching ionic diode responses by surface charge in reconstituted cellulose films
Literature Information
Publication Date
2017-08-14
DOI
10.1039/C7AN00918F
Impact Factor
4.616
Authors
Barak D. B. Aaronson, David Wigmore, Janet L. Scott, Igor Polikarpov, Frank Marken
View Original
Abstract
Cellulose films as well as chitosan-modified cellulose films of approximately 5 μm thickness, reconstituted from ionic liquid media onto a poly(ethylene-terephthalate) (PET, 6 μm thickness) film with a 5, 10, 20, or 40 μm diameter laser-drilled microhole, show significant current rectification in aqueous NaCl. Reconstituted α-cellulose films provide “cationic diodes” (due to predominant cation conductivity) whereas chitosan-doped cellulose shows “anionic diode” effects (due to predominant anion conductivity). The current rectification, or “ionic diode” behaviour, is investigated as a function of NaCl concentration, pH, microhole diameter, and molecular weight of the chitosan dopant. Future applications are envisaged exploiting the surface charge induced switching of diode currents for signal amplification in sensing.
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Source Journal
Analyst
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Analyst publishes analytical and bioanalytical research that reports premier fundamental discoveries and inventions, and the applications of those discoveries, unconfined by traditional discipline barriers.
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4-{1-[4-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl]cyclopropyl}morpholine
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1206594-08-2
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9H-Fluoren-9-ylmethyl [(2S)-1-hydroxy-3-(1H-indol-3-yl)-2-propanyl]carbamate
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Molecular Formula:
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