Projects per year
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 | 14 Aug 2017 |
DOIs | |
Publication status | Published - 7 Oct 2017 |
ASJC Scopus subject areas
- Analytical Chemistry
- Biochemistry
- Environmental Chemistry
- Spectroscopy
- Electrochemistry
Fingerprint
Dive into the research topics of 'Cellulose ionics: Switching ionic diode responses by surface charge in reconstituted cellulose films'. Together they form a unique fingerprint.Projects
- 1 Finished
-
New Materials for Ionic Diodes and Ionic Photodiodes
Marken, F. (PI)
1/11/15 → 31/01/18
Project: UK charity
Equipment
-
MC2-Electron Microscopy (EM)
Material and Chemical Characterisation (MC2)Facility/equipment: Technology type