Effect of Rhodamine-B on the electrodeposition of lead on copper. Revision

Conference · Sat Sep 01 04:00:00 EDT 1984

OSTI ID:6449936

Farmer, J C; Muller, R H

Rhodamine-B chloride (10..mu..M) has been used as a model plating additive in a study of the electrodeposition of Pb from 1 M NaClO/sub 4/, 0.5 and 5 mM Pb/sup + +/ (pH 3) on Cu. Ellipsometer measurements during cyclic voltammetry have shown that the addition of dye results in a more compact bulk deposit than obtained in its absence. It also prevents complete monolayer coverage during formation of the Pb underpotential deposit and shifts the bulk deposition peak to more cathodic potentials during the first potential cycle. Dye effects on potential and micromorphology disappear during subsequent cycling, but reappear after relaxation periods at open circuit. Depletion and readsorption of dye on the surface have been confirmed by spectroscopic ellipsometry. Different optical film models have been investigated for the interpretation of spectroscopic ellipsometer measurements by use of multidimensional analysis. 15 figures.

• Research Organization: Lawrence Berkeley Lab., CA (USA)
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 6449936
• Report Number(s): LBL-17014-Rev.; CONF-830508-28-Rev.; ON: DE85000674
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360101* -- Metals & Alloys-- Preparation & Fabrication
AMINES
CARBOXYLIC ACIDS
COPPER
DEPOSITION
DYES
ELECTRODEPOSITION
ELECTROLYSIS
ELEMENTS
HETEROCYCLIC ACIDS
HETEROCYCLIC COMPOUNDS
LEAD
LYSIS
METALS
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
REAGENTS
RHODAMINES
SURFACE COATING
TRANSITION ELEMENTS