ELECTROCHEMICAL MEASUREMENTS OF ANISOTROPIC DIFFUSION IN THIN LYOTROPIC LIQUID-CRYSTAL FILMS USING INTERDIGITATED ARRAY ELECTRODES

被引：17

作者：

CHEN, CH ^{[1
]}

POSTLETHWAITE, TA ^{[1
]}

HUTCHISON, JE ^{[1
]}

SAMULSKI, ET ^{[1
]}

MURRAY, RW ^{[1
]}

机构：

[1] UNIV N CAROLINA,KENAN & VENABLE LABS CHEM,CHAPEL HILL,NC 27599

来源：

JOURNAL OF PHYSICAL CHEMISTRY | 1995年 / 99卷 / 21期

关键词：

D O I：

10.1021/j100021a055

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A new application of interdigitated array (IDA) electrodes is described for diffusion measurements of electrochemical probes dissolved in thin, lyotropic liquid crystalline films. The liquid crystal is a solution of 32% (w/w) Lithium 4-trans-n-pentyI cyclohexanoate (Li5CH) in water, which can be prepared as well-ordered films of thickness less than ca. 12 mu m. Apparent diffusion coefficients (D-APP) Of the electrochemical probes are calculated from steady-state currents of generator/collector voltammograms. The diffusional anisotropy, measured parallel and perpendicular to the liquid crystal director, increases with increasing hydrophobicity of the probes. A simplified model has been developed to explain the diffusional anisotropy of hydrophobic probes in the ordered film. The transition temperature of the liquid crystal is determined from an activation plot of D-APP for 1,1'-dimethylferrocene.

引用

页码：8804 / 8811

页数：8

共 52 条

[1] QUANTITATIVE-ANALYSIS OF REVERSIBLE DIFFUSION-CONTROLLED CURRENTS OF REDOX SOLUBLE SPECIES AT INTERDIGITATED ARRAY ELECTRODES UNDER STEADY-STATE CONDITIONS [J].

AOKI, K ;

MORITA, M ;

NIWA, O ;

TABEI, H .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1988, 256 (02) :269-282

[2] ELECTRICAL-CONDUCTIVITY MEASUREMENTS OF THE ORIENTATIONAL ORDER PARAMETER IN THE MICELLAR NEMATIC PHASE OF THE CESIUM PENTADECAFLUOROCTANOATE WATER-SYSTEM [J].

BODEN, N ;

PARKER, D ;

JOLLEY, KW .

MOLECULAR CRYSTALS AND LIQUID CRYSTALS, 1987, 152 :121-127

[3] ELECTRICAL-CONDUCTIVITY IN MACROSCOPICALLY ALIGNED NEMATIC AND LAMELLAR MESOPHASES OF THE CESIUM PERFLUORO-OCTANOATE-WATER SYSTEM [J].

BODEN, N ;

CORNE, SA ;

JOLLEY, KW .

CHEMICAL PHYSICS LETTERS, 1984, 105 (01) :99-103

[4] LYOTROPIC MESOMORPHISM OF THE CESIUM PENTADECAFLUOROOCTANOATE WATER-SYSTEM - HIGH-RESOLUTION PHASE-DIAGRAM [J].

BODEN, N ;

CORNE, SA ;

JOLLEY, KW .

JOURNAL OF PHYSICAL CHEMISTRY, 1987, 91 (15) :4092-4105

[5]

BODEN N, 1991, CONDENS MATTER NEWS, V1, P10

[6]

BODEN N, 1980, SPRINGER SER CHEM PH, V11, P299

[7]

BROWN GH, 1979, J LIQUID CRYSTALS BI

[8] USE OF MICROELECTRODE ARRAYS TO DIRECTLY MEASURE DIFFUSION OF IONS IN SOLID ELECTROLYTES - PHYSICAL DIFFUSION OF AG+ IN A SOLID POLYMER ELECTROLYTE [J].

CAMMARATA, V ;

TALHAM, DR ;

CROOKS, RM ;

WRIGHTON, MS .

JOURNAL OF PHYSICAL CHEMISTRY, 1990, 94 (06) :2680-2684

[9] STRUCTURE OF THE LAMELLAR LYO-MESOPHASE IN WATER AMMONIUM PERFLUORONONANOATE MIXTURES - PFG NMR AND H-2-NMR INVESTIGATIONS [J].

CHIDICHIMO, G ;

COPPOLA, L ;

LAMESA, C ;

RANIERI, GA ;

SAUPE, A .

CHEMICAL PHYSICS LETTERS, 1988, 145 (01) :85-89

[10] MICROMETER-SPACED PLATINUM INTERDIGITATED ARRAY ELECTRODE - FABRICATION, THEORY, AND INITIAL USE [J].

CHIDSEY, CE ;

FELDMAN, BJ ;

LUNDGREN, C ;

MURRAY, RW .

ANALYTICAL CHEMISTRY, 1986, 58 (03) :601-607

← 1 2 3 4 5 6 →