Probing liquid | liquid interfaces using neutron reflection measurements and scanning electrochemical microscopy

被引:49
作者
Strutwolf, J
Barker, AL
Gonsalves, M
Caruana, DJ
Unwin, PR
Williams, DE
Webster, JRP
机构
[1] UCL, Dept Chem, London WC1H 0AJ, England
[2] Univ Warwick, Dept Chem, Coventry CV4 7AL, W Midlands, England
[3] Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England
基金
英国工程与自然科学研究理事会; 英国惠康基金;
关键词
neutron reflectivity; liquid vertical bar liquid interface; SECM; interfacial structure;
D O I
10.1016/S0022-0728(00)00027-9
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
A new experimental approach to neutron reflectivity experiments at liquid \ liquid interfaces is presented. This approach allows the investigation of the interface between two immiscible electrolyte solutions. The experimental design involves establishing a thin (sub-10 mu m) aqueous layer on a single crystal quartz block which is then positioned over a PTFE trough containing the organic phase. The dimensions of the thin aqueous film, necessary for the neutron studies, have been characterised using scanning electrochemical microscopy (SECM) double potential step chronoamperometry measurements. Initial results of neutron reflection at the 1,2-dichloroethane \ aqueous potassium hydroxide interface show a smooth interface with a root mean square roughness less than 10 Angstrom, in agreement with theoretical predictions. (C) 2000 Elsevier Science S.A. All rights reserved.
引用
收藏
页码:163 / 173
页数:11
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