Self-assembled monolayer coatings on amorphous iron and iron oxide nanoparticles: Thermal stability and chemical reactivity studies

被引:73
作者
Kataby, G
Prozorov, T
Koltypin, Y
Cohen, H
Sukenik, CN
Ulman, A
Gedanken, A
机构
[1] BAR ILAN UNIV,DEPT CHEM,IL-52900 RAMAT GAN,ISRAEL
[2] WEIZMANN INST SCI,CHEM SERV UNIT,IL-76100 REHOVOT,ISRAEL
[3] POLYTECH UNIV,DEPT CHEM,BROOKLYN,NY 11201
关键词
D O I
10.1021/la960929q
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Self-assembled coatings of long chain thiols on nanoparticles of amorphous iron as well as on amorphous Fe2O3 were formed. The thermal stability of these coatings was investigated by thermal gravimetric analysis (TGA) and differential scanning calorimetry (DSC) of the particles and by mass spectrometric analysis of the molecules desorbed from the surface by heating the amorphous substrates. The results showed a sharp weight loss centered at about 200 degrees C for the thiol-coated particles. The mass spectrometric study of the molecules removed from the surface of the amorphous iron revealed the formation of a dialkyl thioether. For the amorphous Fe2O3 surfaces, a dialkyl disulfide was removed from the surface. The desorptions from the Fe2O3 surface occurred at higher temperatures than those for the amorphous iron. The different mechanisms responsible for these desorption reactions are discussed.
引用
收藏
页码:6151 / 6158
页数:8
相关论文
共 38 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] SYNTHESIS AND CHARACTERIZATION OF SELF-ASSEMBLED HYDROPHOBIC MONOLAYER COATINGS ON SILICA COLLOIDS
    BRANDRISS, S
    MARGEL, S
    [J]. LANGMUIR, 1993, 9 (05) : 1232 - 1240
  • [3] CONTROLLING THE PARTICLE-SIZE OF AMORPHOUS IRON NANOPARTICLES
    CAO, X
    KOLTYPIN, Y
    KATABY, G
    PROZOROV, R
    GEDANKEN, A
    [J]. JOURNAL OF MATERIALS RESEARCH, 1995, 10 (11) : 2952 - 2957
  • [4] CAO X, IN PRESS J MAT RES
  • [5] CAO X, UNPUB CHEM MAT
  • [6] Coadsorption of ethanethiol with sulfur, oxygen, and water on the Fe(100) surface
    Cheng, LC
    Bocarsly, AB
    Bernasek, SL
    Ramanarayanan, TA
    [J]. LANGMUIR, 1996, 12 (02) : 392 - 401
  • [7] ADSORPTION AND DECOMPOSITION OF 1-ALKANETHIOLS ON THE FE(100) SURFACE
    CHENG, LC
    BERNASEK, SL
    BOCARSLY, AB
    RAMANARAYANAN, TA
    [J]. CHEMISTRY OF MATERIALS, 1995, 7 (10) : 1807 - 1815
  • [8] INTERACTION OF ALKANETHIOLS WITH SINGLE-CRYSTAL IRON - THE LOW-TEMPERATURE DECOMPOSITION OF ETHANETHIOL ON THE FE(100) SURFACE
    CHENG, LC
    BOCARSLY, AB
    BERNASEK, SL
    RAMANARAYANAN, TA
    [J]. LANGMUIR, 1994, 10 (12) : 4542 - 4550
  • [9] SELECTIVE CATALYTIC REDUCTION OF NITRIC-OXIDE OVER AMORPHOUS AND CRYSTALLINE CHROMIA .1. COMPARATIVE-STUDY OF ACTIVITIES
    CURRYHYDE, HE
    MUSCH, H
    BAIKER, A
    [J]. APPLIED CATALYSIS, 1990, 65 (02): : 211 - 223
  • [10] DELMARCHE E, 1994, LANGMUIR, V10, P4103