Langmuir-Blodgett film of amphiphilic C[sub 60] carboxylic acid

Journal Article · Wed Feb 01 04:00:00 EST 1995 · Langmuir; (United States)

DOI:https://doi.org/10.1021/la00002a051· OSTI ID:6458056

Matsumoto, Mutsuyoshi; Tachibana, Hiroaki; Azumi, Reiko; Tanaka, Motoo; Nakamura, Takayoshi ^[1]; Yunome, Gen; Abe, Masahiko ^[2]; Yamago, Shigeru; Nakamura, Eiichi ^[3]

---

1. National Inst. of Materials and Chemical Research, Ibaraki (Japan)
2. Science Univ. of Tokyo, Chiba (Japan)
3. Tokyo Inst. of Technology (Japan)

An amphiphilic C[sub 60] molecule with a substituent having a hydrophilic carboxylic group at the end was found to form a monolayer at the air-water interface and the structure of the Langmuir-Blodgett (LB) film (Z-type) was elucidated. The shortest distance between the C[sub 60] was estimated to be 0.95 nm using a limiting area per molecule of 0.78 nm[sup 2] at the air-water interface, assuming the close packing of the C[sub 60] moiety in two dimensions. Adjacent C[sub 60] moieties have an electronic interaction which was shown in the red-shift of the characteristics bands in the UV/vis absorption spectrum of the LB film compared with that of a solution spectrum. Several lines of evidence suggested that the molecule has an oblique orientation in the LB film and exists in a pairwise manner due to the dimer formation of the carboxylic groups within a monolayer, not between the adjacent monolayers. The AFM observations revealed that the surface of a single-layer LB film, which consists of domains of ca. 0.1 [mu]m in diameter, is rather smooth and that the undulation is [+-] 1 nm for most of the surface except for defects such as vacancy and bilayer regions. The area fractions of the monolayer, the vacancy, and the bilayer regions were estimated to be 88 [+-] 7, 7 [+-] 5, 5 [+-] 3%, respectively. 49 refs., 8 figs., 1 tab.

• OSTI ID: 6458056
• Journal Information: Langmuir; (United States), Journal Name: Langmuir; (United States) Vol. 11:2; ISSN LANGD5; ISSN 0743-7463
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360600* -- Other Materials
360602 -- Other Materials-- Structure & Phase Studies
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102 -- Chemical & Spectral Procedures
400201 -- Chemical & Physicochemical Properties
ABSORPTION SPECTRA
CARBON
CARBOXYLIC ACIDS
COHERENT SCATTERING
DIFFRACTION
ELEMENTS
FILMS
FULLERENES
MICROSCOPY
MOLECULAR STRUCTURE
MORPHOLOGY
NONMETALS
ORGANIC ACIDS
ORGANIC COMPOUNDS
SCATTERING
SPECTRA
STRUCTURAL CHEMICAL ANALYSIS
THIN FILMS
X-RAY DIFFRACTION