Pico-electrochemistry in humidity-equilibrated electrolyte films on nanocotton: Three- and four-point probe voltammetry and impedance

SENSORS AND ACTUATORS B-CHEMICAL

卷:210

Article

Macias, Dominic M.¹  Gross, Andrew J.¹  Liew, Soon Yee²  Thielemans, Wim³  Mitchels, John M.¹  Marken, Frank¹ 

[1] Univ Bath, Dept Chem, Bath BA2 7AY, Avon, England

[2] Univ Nottingham, Fac Engn, Proc & Environm Res Div, Nottingham NG7 2RD, England

[3] Katholieke Univ Leuven, Dept Chem Engn, B-8500 Kortrijk, Belgium

关键词: Spot test;    Cotton;    Cellulose nanowhiskers;    Cellulose nanocrystals;    Electroanalysis;    Ferrocyanide;   

DOI  :  10.1016/j.snb.2015.01.004

来源: Elsevier

【 摘 要 】

Cotton extracted cellulose nanocrystals are spin-coated from aqueous suspension (0.6 wt%) onto glass slides to give ca. 40 nm thick films. Impregnation with LiCl and redox active Fe(CN)(6)(3-)/(4-) into this film gives extremely thin redox active layers (typically 170 nm at 60% relative humidity), which were investigated with a 4-point or 3-point probe electrochemical system based on 250 mu m diameter platinum wire probes. Both voltammetry and impedance measurements were performed and effects from humidity, concentrations, and time domain on measurements are reported. Only a pico-litre volume under the working electrode was active to give a novel electroanalytical spot test. (C) 2015 Elsevier B.V. All rights reserved.

【 授权许可】

Free