Cellulose ionics: switching ionic diode responses by surface charge in reconstituted cellulose films

Barak Aaronson; David Wigmore; Marcus Johns; Janet Scott; Igor Polikarpov; Frank Marken

doi:10.1039/C7AN00918F

Cellulose ionics: switching ionic diode responses by surface charge in reconstituted cellulose films

Barak Aaronson, David Wigmore, Marcus Johns, Janet Scott, Igor Polikarpov, Frank Marken

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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.

Original language	English
Pages (from-to)	3707-3714
Number of pages	8
Journal	Analyst
Volume	142
Issue number	19
Early online date	13 Aug 2017
DOIs	https://doi.org/10.1039/C7AN00918F
Publication status	Published - 7 Oct 2017

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title = "Cellulose ionics: switching ionic diode responses by surface charge in reconstituted cellulose films",

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.",

author = "Barak Aaronson and David Wigmore and Marcus Johns and Janet Scott and Igor Polikarpov and Frank Marken",

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T1 - Cellulose ionics

T2 - switching ionic diode responses by surface charge in reconstituted cellulose films

AU - Aaronson, Barak

AU - Wigmore, David

AU - Johns, Marcus

AU - Scott, Janet

AU - Polikarpov, Igor

AU - Marken, Frank

PY - 2017/10/7

Y1 - 2017/10/7

N2 - 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.

AB - 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.

U2 - 10.1039/C7AN00918F

DO - 10.1039/C7AN00918F

M3 - Article (Academic Journal)

SN - 0003-2654

VL - 142

SP - 3707

EP - 3714

JO - Analyst

JF - Analyst

IS - 19

ER -

Cellulose ionics: switching ionic diode responses by surface charge in reconstituted cellulose films

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