INTERACTIONS, STRUCTURE, AND STABILITY OF PHOTOREACTIVE BOLAFORM AMPHIPHILE MULTILAYERS

被引:71
作者
MAO, GZ
TSAO, YH
TIRRELL, M
DAVIS, HT
HESSEL, V
RINGSDORF, H
机构
[1] UNIV MINNESOTA,DEPT CHEM ENGN & MAT SCI,MINNEAPOLIS,MN 55455
[2] UNIV MAINZ,INST ORGAN CHEM,D-55099 MAINZ,GERMANY
关键词
D O I
10.1021/la00003a043
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Ultrathin organic multilayer films are appealing to scientists not only because they serve as molecular level models but also because they can be transformed into superlattices through successive deposition of alternating layers of different materials. Cationic bolaform amphiphile and anionic polyelectrolyte multilayers were self-assembled from their aqueous solutions via electrostatic attraction. The bolaform amphiphile layers are photopolymerizable by UV irradiation. The mechanical and surface electrical properties of the multilayer film were studied by surface force measurements, and the surface topography was studied by atomic force microscopy. We observed an average increase in film thickness of 75 Angstrom with each amphiphile and polyelectrolyte double layer deposition, a molecularly smooth first anchoring amphiphile layer, and nonuniform polyelectrolyte layers with a surface roughness of 30 Angstrom. The surface roughness was preserved in the multilayer deposition process and was reduced by adding salt to the polyelectrolyte solution. Photopolymerization increases the integrity of the first anchoring layer as well as the subsequent multilayers. It took less than 5 min to dissolve a monomeric amphiphile film in chloroform, but immersion of the UV-irradiated film in chloroform for 2 h only resulted in partial removal of film materials. The multilayer film is quite fragile especially for the first few layers. Controlling of the monolayer structure by selective variation of the amphiphile chemical structure may help to optimize the photopolymerization process.
引用
收藏
页码:942 / 952
页数:11
相关论文
共 54 条
  • [1] FORMATION OF MONOLAYER FILMS BY THE SPONTANEOUS ASSEMBLY OF ORGANIC THIOLS FROM SOLUTION ONTO GOLD
    BAIN, CD
    TROUGHTON, EB
    TAO, YT
    EVALL, J
    WHITESIDES, GM
    NUZZO, RG
    [J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1989, 111 (01) : 321 - 335
  • [2] ADSORPTION OF WEAK POLYELECTROLYTES ON HIGHLY CHARGED SURFACES - POLY(ACRYLIC ACID) ON POLYSTYRENE LATEX WITH STRONG CATIONIC GROUPS
    BLAAKMEER, J
    BOHMER, MR
    STUART, MAC
    FLEER, GJ
    [J]. MACROMOLECULES, 1990, 23 (08) : 2301 - 2309
  • [3] Use of interference to extinguish reflection of light from glass
    Blodgett, KB
    [J]. PHYSICAL REVIEW, 1939, 55 (04): : 0391 - 0404
  • [4] TEMPERATURE-DEPENDENT ELECTRON-DIFFRACTION STUDIES OF CADMIUM ARACHIDATE MONOLAYERS AND MULTILAYERS
    BOHM, C
    STEITZ, R
    RIEGLER, H
    [J]. THIN SOLID FILMS, 1989, 178 : 511 - 517
  • [5] INFRARED AND ELECTRON-DIFFRACTION STUDIES OF TRANSIENT STAGES IN VERY THIN LANGMUIR-BLODGETT FILMS
    BONNEROT, A
    CHOLLET, PA
    FRISBY, H
    HOCLET, M
    [J]. CHEMICAL PHYSICS, 1985, 97 (2-3) : 365 - 377
  • [6] Molecular self-assembly of conducting polymers
    Cheung, J.H.
    Fou, A.F.
    Rubner, M.F.
    [J]. Thin Solid Films, 1994, 244 (1 -2 pt 3) : 985 - 989
  • [7] Churaev N.V., 1987, SURFACE FORCES, V1st edn
  • [8] THE CONFIGURATION OF SODIUM POLY(STYRENE SULFONATE) AT POLYSTYRENE SOLUTION INTERFACES
    COSGROVE, T
    OBEY, TM
    VINCENT, B
    [J]. JOURNAL OF COLLOID AND INTERFACE SCIENCE, 1986, 111 (02) : 409 - 418
  • [9] SURFACE-INDUCED ORIENTATION OF SYMMETRIC, DIBLOCK COPOLYMERS - A SECONDARY ION MASS-SPECTROMETRY STUDY
    COULON, G
    RUSSELL, TP
    DELINE, VR
    GREEN, PF
    [J]. MACROMOLECULES, 1989, 22 (06) : 2581 - 2589
  • [10] BUILDUP OF ULTRATHIN MULTILAYER FILMS BY A SELF-ASSEMBLY PROCESS .3. CONSECUTIVELY ALTERNATING ADSORPTION OF ANIONIC AND CATIONIC POLYELECTROLYTES ON CHARGED SURFACES
    DECHER, G
    HONG, JD
    SCHMITT, J
    [J]. THIN SOLID FILMS, 1992, 210 (1-2) : 831 - 835