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  • Electronic Resource  (7)
  • 1995-1999  (7)
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  • Electronic Resource  (7)
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  • 1
    Electronic Resource
    Electronic Resource
    Correlation states of ethylene (1995)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 102 (1995), S. 6385-6399 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: High resolution synchrotron photoelectron spectra (PES) of ethylene have been obtained at several photon energies in the range 30 to 220 eV. Further evidence is presented that the correlation (satellite) peak at 27.4 eV binding energy is "intrinsic'' in nature. A new correlation peak at 21.4 eV binding energy, however, is found to be a "dynamic'' correlation. Several PES of 1-13C-ethylene have also been obtained and have been found to be identical to those of normal ethylene. Both of the correlation peaks are also present in the labeled species with similar photon energy behaviors. Sophisticated theoretical calculations are found to agree quantitatively with the experimental PES spectra. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.469354
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  • 2
    Electronic Resource
    Electronic Resource
    Two-peak electroluminescence of porous silicon in persulphate solution (1998)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 72 (1998), S. 924-926 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A large blue shift of electroluminescence (EL) was achieved from oxidized n-type porous silicon (PS) in a persulphate solution under cathodic polarization. The two-peak phenomenon observed in the EL spectrum suggests that there are two types of luminescent centers located in the nanoscale silicon particles and at the surface of the oxidized PS layer, respectively. It is found that only the low-energy peak having luminescent centers in nanoscale silicon particles can be tuned by voltage, supporting the quantum confinement model. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.120619
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  • 3
    Electronic Resource
    Electronic Resource
    Kinetic Study of UV Peroxidation of Bis(2-chloroethyl) Ether in Aqueous Solution (1995)
    s.l. : American Chemical Society
    Industrial & engineering chemistry research 34 (1995), S. 1960-1968 
    Details
    ISSN: 1520-5045
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ie00045a005
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  • 4
    Electronic Resource
    Electronic Resource
    In situ CdS nanocluster formation on scanning tunneling microscopy tips for reliable single-electron tunneling at room temperature (1999)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 75 (1999), S. 3023-3025 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We report on a chemical approach to fabricating double-barrier tunneling junction (DBTJ) for room-temperature single-electron tunneling studies, by which CdS nanoclusters were directly synthesized on a scanning tunneling microscopy (STM) tip through an organic self-assembled monolayer (SAM) and in situ chemical reaction. The SAM/CdS-modified STM tip directly establishes a DBTJ structure with highly oriented pyrolytic graphite substrate with STM-based current–voltage measurement. Clear Coulomb staircases were observed at room temperature with this experimental approach, and the reproducibility was nearly 90%. When gradually reducing the tip-substrate gap by increasing the setpoint current, the staircase width showed a gradual decrease from 320 to 180 mV. These phenomena are well described by semiclassical model for correlated single-electron tunneling. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.125221
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  • 5
    Electronic Resource
    Electronic Resource
    Further evidence for the quantum confined electrochemistry model of the formation mechanism of p−-type porous silicon (1996)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 69 (1996), S. 3399-3401 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Two types of p− porous silicon (PS) were formed in HF solutions of different concentrations. One type with nanoscale (NS) dimensions of about 3 nm and the other with dimensions of about 5 nm. PS samples formed in the lower concentration of HF were anodized again in the higher concentration of HF and vice versa. The photoluminescence peak position and, thus, the size of NS units of PS were found to be related to the concentration of HF in which the PS is formed, independent of the forming time. The larger NS units of PS can be further electrochemically etched by anodization, while the smaller ones cannot. These results give a confirming evidence for the quantum confined electrochemistry model of the formation mechanism of PS based on the quantum confinement effect and classical electrochemical theory [S. L. Zhang, K. S. Ho, Y. T. Hou, B. D. Qian, P. Diao, and S. M. Cai, Appl. Phys. Lett. 62, 642 (1993)]. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.117272
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  • 6
    Electronic Resource
    Electronic Resource
    Force titration of amino group-terminated self-assembled monolayers using chemical force microscopy (1998)
    Springer
    Applied physics 66 (1998), S. S269 
    Details
    ISSN: 1432-0630
    Keywords: PACS: 07.79.-v; 68.35.Bs
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: 3 N4 tip functionalized with OHgroups and a silicon substrate functionalized with NH2 groups. The curve of the adhesion force as a function of the solution pH value (force titration curve) was obtained. The pK1/2 of surface NH2 groups estimated from the force titration curve is 7.4, about 3 pK units lower than the pK value of NH2 functionality in aqueous solution, and in nice agreement with the value of pK1/2=7.6 determined by conventional contact angle titration. The surface pK1/2 value that we obtained from the force titration or contact angle titration is the apparent surface pK value, which is expressed as the corresponding bulk solution pH value at which the functional groups at the interface are half-ionized.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003390051143
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  • 7
    Electronic Resource
    Electronic Resource
    The assembly of keratins from higher plant cells (1995)
    Springer
    Protoplasma 188 (1995), S. 128-132 
    Details
    ISSN: 1615-6102
    Keywords: Plant cell ; Intermediate filament ; Assembly ; Scanning tunneling microscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary In vitro assembly and morphological characteristics of purified 58 kDa, 52 kDa, 50 kDa, and 45 kDa polypeptides in the leaves and the cotyledons of the cabbage (Brassica pekinensis Rupt.) were investigated by electron microscopy and scanning tunneling microscopy. The three or four purified intermediate filament (IF) polypeptides can spontaneously assemble into intermediate filaments in vitro with a 23–24 nm axial repeat, which indicates that keratin IFs in higher plant cells have the same molecular arrangement as in animal cells. STM images suggest that the plant keratin filaments display a pronounced structural polymorphism, which can be composed of 3 nm, 4.5 nm, or 6 nm wide keratin protofilaments.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01276803
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