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The Use of Cyclic Voltammetry To Probe the Passivation of Electrode Surfaces by Well-Ordered Self-Assembly and Langmuir–Blodgett Films. An Advanced Undergraduate Laboratory Experiment in Surface Science and Nanomaterials Chemistry

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Ana Villares , Gorka Pera and Ignacio Giner

Departamento de Química Orgánica y Química Física, Facultad de Ciencias, Universidad de Zaragoza, Plaza San Francisco s/n, 50009, Zaragoza, Spain

Pilar Cea and María C. López

Departamento de Química Orgánica y Química Física, Facultad de Ciencias and Instituto de Nanociencia de Aragón, Universidad de Zaragoza, Plaza San Francisco s/n, 50009, Zaragoza, Spain

Santiago Martín

Department of Chemistry, University of Liverpool, Liverpool, L69 7ZD, United Kingdom

J. Chem. Educ., 2009, 86 (6), p 723

DOI: 10.1021/ed086p723

Publication Date (Web): June 1, 2009

Abstract

An advanced undergraduate laboratory experiment is described in which the students use cyclic voltammetry (CV) as an electrochemical tool to probe the passivation of electrode surfaces covered by well-ordered self-assembly and Langmuir–Blodgett films. This set of experiments is intended to (i) serve as an introduction to the bottom-up strategies for the fabrication of well-ordered thin solid films; (ii) illustrate the passivation effect of well-ordered films deposited on electrodes; (iii) analyze the blocking behavior of the films using a redox probe and CV; and (iv) allow the students to perform a comparison study of physically and chemically attached films on electrodes.

Keywords (Audience):

Upper-Division Undergraduate

Keywords (Domain):

Analytical Chemistry

Keywords (Pedagogy):

Hands-On Learning / Manipulatives

Keywords (Subject):

Electrochemistry

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This article has been cited by 1 ACS Journal articles (1 most recent appear below).

Fabrication, Characterization, and Electrical Properties of Langmuir−Blodgett Films of an Acid Terminated Phenylene−Ethynylene Oligomer
Ana Villares, Gorka Pera, Santiago Martín, Richard J. Nichols, Donocadh P. Lydon, Lucas Applegarth, Andrew Beeby, Paul J. Low and Pilar Cea
Chemistry of Materials2010 22 (6), 2041-2049
- Fabrication, Characterization, and Electrical Properties of Langmuir−Blodgett Films of an Acid Terminated Phenylene−Ethynylene Oligomer
  Ana Villares, Gorka Pera, Santiago Martín, Richard J. Nichols, Donocadh P. Lydon, Lucas Applegarth, Andrew Beeby, Paul J. Low and Pilar Cea
  Chemistry of Materials2010 22 (6), 2041-2049
  This paper describes the preparation of Langmuir−Blodgett (LB) films comprised of an oligomeric phenylene−ethynylene (OPE) derivative, 4-[4-(phenylethynyl)-phenylethynyl] benzoic acid (BPEBA). Analysis of the surface pressure and surface potential vs area ...
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