The Interaction of the Polyimide Precursors PMDA and m-PDA with Ni(110)

Abstract

X-ray Photoelectron Spectroscopy (XPS) and High Resolution Electron Energy Loss Spectroscopy (HREELS) have been used to study the adsorption of polyimide precursor molecules on Ni(110). PMDA (1,2,4,5-benzenetetracarboxylic anhydride) and m-PDA (1,3-phenylenediamine) were vapour deposited in vacuo at substrate temperatures of between 150 and 300K. Both m-PDA and PMDA adsorb at 300K without major fragmentation. For m-PDA, adsorption to the surface occurs via its nitrogen atoms. HREELS results suggest that significant deprotonation of the amine groups occur and that the plane of the aromatic ring is aligned close to the surface normal. For PMDA, the primary chemical interaction with the Ni is through at least one of the anhydride oxygens, and the plane of the aromatic ring is aligned close to the surface normal. Therefore, adhesion to the surface is through one anhydride unit only. Keywords: Pyromellitic dianhydride; Phenylenediamine; Ni(110); Adsorption; Polyimides; X-ray photoelectron spectroscopy; Adhesion; High resolution electron energy loss spectroscopy; Nickel. (kt)

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Document Details

Document Type
Technical Report
Publication Date
Sep 29, 1989
Accession Number
ADA213894

Entities

People

  • M. R. Ashton
  • N. V. Richardson
  • R. G. Mack
  • T. S. Jones
  • W. N. Unertl

Organizations

  • University of Maine

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Adhesion
  • Anhydrides
  • Chemistry
  • Electron Energy
  • Electrons
  • Energy
  • Films
  • High Resolution
  • Military Research
  • Photoelectrons
  • Physical Properties
  • Scattering
  • Spectra
  • Spectroscopy
  • Subatomic Particles
  • X Ray Photoelectron Spectroscopy
  • X Rays

Readers

  • Analytical Chemistry
  • Nanofabrication and Microfabrication.
  • Quantum Chemistry

Technology Areas

  • Microelectronics
  • Microelectronics - Graphene