Characterization of mono- and multi-molecular assemblies at glassy carbon and noble metals by ex situ and in situ infrared external reflection spectroscopy

Technical Report · Thu Aug 23 04:00:00 EDT 1990

DOI:https://doi.org/10.2172/6667455· OSTI ID:6667455

Stole, S M

This dissertation describes the utilization of infrared external reflection spectroscopy (IR-ERS) as a means of elucidating many of the properties of polymer films and mono- and multimolecular films at both semiconducting glassy carbon and conducting noble metal surfaces. Infrared external reflection spectroscopy was utilized to monitor the hydrolysis of the film as the molecular composition changed from the acetate to the cellulosic form. The electrochemical measurements indicate a change in perselectivity as the hydrolysis proceeds. The effects of a variety of solvents on the integrity and orientation of an n-alkanethiol monolayer were studied by IR-ERS without the necessity for modulation methodologies. This dissertation reports the first in situ infrared external reflection spectra for an n-alkanethiol monolayer at Au and Ag in the presence of a variety of solvents without the need for potential or polarization modulation. Descriptions provided by such measurements promise to expand the understanding of the fundamental intermolecular forces that control the chemical and physical properties of these interfaces. Further, this technique has far-reaching applicability to a variety of other interfacial systems with varying properties.

• Research Organization: Ames Lab., IA (USA)
• Sponsoring Organization: DOE/ER
• DOE Contract Number: W-7405-ENG-82
• OSTI ID: 6667455
• Report Number(s): IS-T-1486; ON: DE90016417
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102* -- Metals & Alloys-- Structure & Phase Studies
42 ENGINEERING
426000 -- Engineering-- Components
Electron Devices & Circuits-- (1990-)
ABSORPTION
CARBON
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
ELECTROMAGNETIC RADIATION
ELEMENTS
FILMS
GOLD
INFRARED SPECTRA
INTERFACES
MATERIALS
METALS
NONMETALS
OPTICAL PROPERTIES
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
PLATINUM
PLATINUM METALS
POLYMERS
RADIATIONS
REFRACTIVITY
SEMICONDUCTOR MATERIALS
SPECTRA
SPECTROSCOPY
SUBSTRATES
THIN FILMS
TRANSITION ELEMENTS