C{sub 60}-propylamine adduct monolayers at the air-water interface

Journal Article · Mon May 01 04:00:00 EDT 1995 · Langmuir

DOI:https://doi.org/10.1021/la00005a005· OSTI ID:62439

Vaknin, D; Wang, J Y; Uphaus, R A ^[1]

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1. Ames Lab., IA (United States)

X-ray reflectivity measurements and surface-pressure isotherms of spread films of the fullerene-propylamine adduct C{sub 60} - [NH{sub 2}(CH{sub 2}){sub 2}CH{sub 3}]{sub 12} indicate that despite the lack of definite amphiphilic character, this material forms a homogeneous monomolecular layer on water surfaces. X-ray reflectivity data, taken at various lateral pressures, were fitted to a model structure defined in terms of the dimensions of an average cell and its chemical compositions. At T = 18 {sup 14}C, the lateral pressure versus area per molecule is indicative of a structural phase transition presumably from one closely-packed phase to another, as the total thickness of the film is consistent with a single layer of 15 A thickness. At pressures above 30 mN/m the film consists of an inhomogeneous bilayer, consistent with a layer thickness of 26 A. 16 refs., 3 figs., 1 tab.

• Sponsoring Organization: USDOE
• DOE Contract Number: W-7405-ENG-82
• OSTI ID: 62439
• Journal Information: Langmuir, Journal Name: Langmuir Journal Issue: 5 Vol. 11; ISSN 0743-7463; ISSN LANGD5
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
40 CHEMISTRY
ADDUCTS
AMINES
COLLOIDS
FULLERENES
INTERFACES
ISOTHERMS
PHYSICAL CHEMISTRY
PROPYL RADICALS
REFLECTIVITY
SURFACE PROPERTIES
THIN FILMS
X RADIATION