Characterization and reactivity of organic monolayers on gold and platinum surfaces

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Purpose is to understand how the mobilization, dielectric, orientation, composition, coverage, and structure of self-assembled organic monolayers on metal surfaces affects the surface reactivities and properties of these films in order to facilitate the construction of desired films. Two model systems were used: tiols at Au and aromatic acids at Pt. Surface analysis methods, including contact angle, electrochemistry, ellipsometry, infrared reflection absorption spectroscopy (IRRAS), and x-ray photospectroscopy, were used to study the self-assembled organic monolayers on Au and Pt. IRRAS, contact angle, and electrochemistry were used to determine the surface pK{sub a} of phenylcarboxylic acids and pyridylcarboxylic acids monolayers on ... continued below

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213 p.

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Wu, Chien-Ching December 6, 1995.

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  • Ames Laboratory
    Publisher Info: Ames Lab., IA (United States)
    Place of Publication: Iowa

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Description

Purpose is to understand how the mobilization, dielectric, orientation, composition, coverage, and structure of self-assembled organic monolayers on metal surfaces affects the surface reactivities and properties of these films in order to facilitate the construction of desired films. Two model systems were used: tiols at Au and aromatic acids at Pt. Surface analysis methods, including contact angle, electrochemistry, ellipsometry, infrared reflection absorption spectroscopy (IRRAS), and x-ray photospectroscopy, were used to study the self-assembled organic monolayers on Au and Pt. IRRAS, contact angle, and electrochemistry were used to determine the surface pK{sub a} of phenylcarboxylic acids and pyridylcarboxylic acids monolayers on Pt. These techniques were also used to determine the orientation of polymethylene chain axis and the carboxylic follow the structural evolution of the chains and end group of the thiolate monolayers during formation. IRRAS was also used to assess the carboxylic acid group in terms of its possible existence as the non-hydrogen-bonded species, the hydrogen-bonded dimeric group, and the hydrogen-bonded polymeric group. These different forms of the end group were also followed vs coverage, as well as the reactivity vs solution pH. IRRAS and contact angle were used to calculate the rate constant of the esterification of carboxylic acid-terminated monolayers on Au.

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213 p.

Notes

OSTI as DE96012080

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  • Other Information: TH: Thesis (Ph.D.)

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  • Other: DE96012080
  • Report No.: IS-T--1671
  • Grant Number: W-7405-ENG-82
  • Office of Scientific & Technical Information Report Number: 249072
  • Archival Resource Key: ark:/67531/metadc668585

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • December 6, 1995

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  • June 29, 2015, 9:42 p.m.

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  • Nov. 19, 2015, 12:16 p.m.

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Wu, Chien-Ching. Characterization and reactivity of organic monolayers on gold and platinum surfaces, thesis or dissertation, December 6, 1995; Iowa. (digital.library.unt.edu/ark:/67531/metadc668585/: accessed October 18, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.