ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • American Institute of Physics (AIP)  (11)
  • 1985-1989  (11)
Collection
Publisher
Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    A hole burning study of excitonic states of chain molecules in glasses (1989)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 91 (1989), S. 7988-7993 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Thermal broadening of spectral holes burnt into excitonic states of long chain molecular aggregates of pseudoisocyanine iodide is investigated over a temperature range from 350 mK to 80 K. The results differ very much from the usual behavior of small molecules in glasses. We found that extended states are almost completely decoupled from the amorphous host lattice and spectral diffusion effects play a minor role. The homogeneous linewidth is independent of temperature below 10 K. Above, thermal broadening occurs in two steps: there is a weak onset around 15 K and a strong onset around 65 K. The data can be fitted by a superposition of two exponentials.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.457217
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Probing of conformational relaxation processes of proteins by frequency labeling of optical states (1989)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 90 (1989), S. 1270-1273 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: We show how optical frequency labeling at cryogenic temperatures can be used to probe in a most direct way protein substates and to elucidate the nature of the structural relaxation processes involved.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.456131
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Probing of extremely low configurational barriers in an organic glass (1988)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 88 (1988), S. 6655-6657 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: By measuring the reduction of a spectral hole burnt at 500 mK due to temperature cycling experiments, we show that the lower bound of the distribution function of barrier heights is below 10 cm−1.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.454405
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Conformational transitions of long chain molecules in frozen solutions (1989)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 91 (1989), S. 7296-7299 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: We show by temperature-cycling-hole-burning experiments that the conformational barriers of one-dimensional long chain aggregates of pseudoisocyanine iodide in frozen solutions follow a distribution of the form Pv(V)∼1/V . This is the same distribution as has been measured for three-dimensional glasses.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.457297
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    High resolution frequency selective photochemistry of phycobilisomes at cryogenic temperatures (1988)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 89 (1988), S. 871-874 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Highly frequency selective photochemistry at cryogenic temperatures is used to gain information on the excited state dynamics of large biomolecular aggregates, the phycobilisomes from the blue–green alga (cyanobacterium) Masticogladus laminosus. In particular, we show that in spite of the well organized structure of these aggregates disorder on a microscopic level dominates the optical spectra. The hole burning reaction in the resonantly excited chromophores is most probably due to a conformational change in the neighborhood of the chromophore. From the widths of the holes energy transfer times between different pigments on the order of 16 ps are determined. These transfer times are independent of the excitation energy.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.455209
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Investigation of polarization diffusion and relaxation dynamics of low temperature glasses (1985)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 82 (1985), S. 2935-2938 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: We investigated the optical anisotropy and the normalized areas of persistent spectral holes in organic glasses over almost 1 week (4 decades). The systems studied were 1,4-dihydroxyanthraquinone and tetracene in an EtOH/MeOH glass. The areas of the holes decay on a logarithmic time scale, but the anisotropy remains constant. We draw the following conclusions: (i) There is no reorientation of dye molecules in the glass. (ii) Molecules relaxing from the product state reassume the position in the frequency domain and in space which they had before hole burning. (iii) A dye molecule seems to be strongly coupled just to one two level system (TLS).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.448241
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Oxide degradation during selective epitaxial growth of silicon (1988)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 64 (1988), S. 3538-3541 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A derivative of selective epitaxial growth and epitaxial lateral overgrowth, has been devised to create single-crystal silicon on insulator structures. The effect of conditions present in selective epitaxial growth and epitaxial lateral overgrowth on the electrical characteristics of the insulating masking oxides has been studied. It was determined that thin (〈150 nm) oxides were attacked by the ambient employed in selective epitaxy. The rate of degradation increased with decreasing oxide thickness and with the addition of silicon-containing species to the gas phase. The observed defect formation may be related to the oxide decomposition during annealing in oxygen-free ambients and the undercutting of masking oxide at the Si-SiO2 interface during the in situ preclean step used in epitaxial processes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.341492
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Influence of phonons on optically detected magnetic resonances of aromatic molecules in amorphous hosts (1986)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 84 (1986), S. 2079-2083 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: We present phosphorescence wavelength selected optically detected magnetic resonance (ODMR) experiments on some aromatic molecules in organic glasses. The change of the ODMR frequency and width as a function of phosphorescence wavelength is interpreted in terms of a spinless stochastic Hamiltonian which describes the interaction between the probe molecule and the solvent. It is shown that the phonons in the optical spectra have a significant influence on the parameters of the ODMR profile.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.450417
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Stability of frequency domain information bits in amorphous organic materials (1989)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 66 (1989), S. 3232-3240 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We investigate the stability of frequency domain information bits as a function of time and temperature fluctuations. A large body of experimental results for a variety of organic materials is presented and analyzed in terms of phenomenological models on spectral diffusion and dispersive kinetics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.344114
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    The dependence of silicon selective epitaxial growth rates on masking oxide thickness (1989)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 65 (1989), S. 1713-1716 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Growth rates in selective epitaxial depositions (SEG) and epitaxial lateral overgrowth (ELO) in the SiCl2H2-HCl-H2 system were studied as a function of masking oxide thickness. Enhanced growth was observed on wafers with thin (80 nm), as compared to thick (〉300 nm), masking oxides. The higher growth rates on wafers with thin oxides were attributed to their higher surface temperature. The higher surface temperature for wafers with thin oxides is demonstrated to be due to decreased radiant heat transfer as compared to wafers with thicker oxides. The dependence of oxide thickness on growth rates was global, meaning that the bulk or large area field oxide thickness, and not the local oxide thickness in the immediate vicinity of the seed window, determined the growth rates. Hence, the dependence of growth rates on masking oxide thickness is critical in understanding, designing, and comparing experiments studying epitaxial deposition processes, but is less critical for technological applications of SEG and ELO.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.342943
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...