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  • 1
    Digitale Medien
    Digitale Medien
    Numerical analysis of a step-coupled well: A novel quantum-confined Stark shift structure (1992)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 72 (1992), S. 5329-5332 
    Details
    ISSN: 1089-7550
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: A new quantum-confined Stark shift structure, the step-coupled well, is introduced. The feature of the new structure is using a square well of only one quantum state to enhance the Stark shift of the step well. The design rule of 10-μm modulator is suggested. The transfer matrix technique is used for numerical calculation. Numerical results show that the new structure produces a larger Stark shift (13 meV) than the step well (7 meV) under the same bias (20 kV/cm). A lower electric field is thus needed for the step-coupled well to produce the same Stark shift, so that the leakage problem can be minimized and a high switching speed can be achieved.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.351967
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  • 2
    Digitale Medien
    Digitale Medien
    Comment on "Richardson criteria for stratified vortex motions under gravity'' [Phys. Fluids 29, 368 (1986)] (1987)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Fluids 30 (1987), S. 1231-1232 
    Details
    ISSN: 1089-7666
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: It is shown that the sufficient conditions for stability established by Fung [Phys. Fluids 29, 368 (1986)] for the stratified vortex flows with velocity and density distribution varying in both the radial and axial directions can never be satisfied except for a trivial case, i.e., the solid body rotation. However, an estimate of the growth rate can still be made based on the technique developed by Fung.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.866277
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  • 3
    Digitale Medien
    Digitale Medien
    Effect of diamond facet on the electrical properties of Pt/BF+2 ion implanted polycrystalline diamond contacts (1993)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 63 (1993), S. 3344-3346 
    Details
    ISSN: 1077-3118
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: Very good quality of polycrystalline diamond films with different major facets were grown on the Si(100) substrates at different position of the plasma ball in a microwave plasma enhanced chemical vapor deposition chamber. Pt/BF+2 ion implanted polycrystalline diamond contacts were fabricated to examine the effect of diamond facets on their electrical properties. The Pt/diamond contact exhibited Schottky characteristics for the diamond film with major facet (100). In contrast, the Pt/diamond contact exhibited ohmic behavior for the diamond film with major facet (111). The I-V characteristics of the Pt/BF+2 ion implanted polycrystalline diamond contacts were not reliable if the diamond facet factor was not considered.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.110165
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  • 4
    Digitale Medien
    Digitale Medien
    Effects of local facet and lattice damage on nucleation of diamond grown by microwave plasma chemical vapor deposition (1992)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 60 (1992), S. 1559-1561 
    Details
    ISSN: 1077-3118
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: Diamond deposition on an anisotropic etched Si and ion implanted Si surfaces have been examined here for the first time. Local facets on an anisotropic etched surface shows no nucleation of diamond. Synthetic diamond, in contrast, has been able to nucleate on an As+ or Si+ ion implanted Si substrate without diamond abrasive pretreatment. Selective deposition of diamond occurs only for low dose ion implantation, 100 keV 1014 cm−2, but not for high dose ion implantation, 100 KeV 1016 cm−2. Strain is proposed as the main reason for nucleation of diamond on the ion implanted Si substrates.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.107250
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  • 5
    Digitale Medien
    Digitale Medien
    Reliability of the electrical properties of the BF2+ ion implanted polycrystalline diamond film (1993)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 63 (1993), S. 524-526 
    Details
    ISSN: 1077-3118
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: The resistance of the BF2+ ion implanted polycrystalline diamond film drifted higher with time when the diamond film was exposed in air. The reliable resistance of the implanted diamond film could be obtained after the heat treatment at high temperature under vacuum. Temperature dependence of the reliable resistance of the BF2+ ion implanted diamond film indicated two activation energies within the temperature range from room temperature to 400 °C. The effect of gas exposure on the resistance of the implanted diamond film was discussed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.109993
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  • 6
    Digitale Medien
    Digitale Medien
    Spatial resolution of selectively deposited diamond stripes on ion implanted Si(100) (1994)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 64 (1994), S. 73-75 
    Details
    ISSN: 1077-3118
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: Diamond stripes were successfully grown on the P+ ion implanted Si(100) substrate without the diamond abrasives pretreatment. The pattern of a transmission line model (TLM) was used to define the shape of the diamond stripes on Si(100). Lateral resolution of diamond stripes depended on the thickness of SiO2 on the patterned Si(100) substrate. The width of each diamond stripe was about the same as that of the corresponding SiO2 open window for the SiO2 layer of 18 000 and 9000 A(ring). A critical SiO2 thickness existed for diamond stripe deposition on the implanted Si(100), below which good spatial resolution of diamond stripes could not be achieved.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.110872
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  • 7
    Digitale Medien
    Digitale Medien
    Derivatization-gas chromatographic analysis of cinoxacin in capsules as its pentafluorobenzyl derivative
    Amsterdam : Elsevier
    Journal of Chromatography A 360 (1986), S. 443-448 
    Details
    ISSN: 0021-9673
    Quelle: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Thema: Chemie und Pharmazie
    Materialart: Digitale Medien
    URL: http://linkinghub.elsevier.com/retrieve/pii/S0021-9673(00)91695-9
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  • 8
    Digitale Medien
    Digitale Medien
    Low temperature crystallization of amorphous silicon films
    Amsterdam : Elsevier
    Thin Solid Films 64 (1979), S. 63-64 
    Details
    ISSN: 0040-6090
    Quelle: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Thema: Physik
    Materialart: Digitale Medien
    URL: http://linkinghub.elsevier.com/retrieve/pii/0040-6090(79)90544-3
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  • 9
    Digitale Medien
    Digitale Medien
    Formation of metastable t′ -phase in solute-redistributed Y-PSZ (1991)
    Springer
    Journal of materials science 26 (1991), S. 112-116 
    Details
    ISSN: 1573-4803
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau
    Notizen: Abstract Owing to solute redistribution by a liquid phase analogue of diffusion-induced grain-boundary migration metastable and anti-phase domain boundary-bearing tetragonal (t′) phase was seen to occur in the cubic (c) matrix grain of sintered (1400 °C, 2 h) and furnace-cooled yttriapartially stabilized zirconia (Y-PSZ) specimens (TZ3Y + 12Y-PSZ in molar ratios of 4:1, 1:1 and 1∶4). In contrast to that formed by rapid cooling, t′-phase formed by slow cooling shows no deformation accommodation twins. Subsequent ageing at 1100 °C for up to 240 h caused the formation of finely tweed (c) and tetragonal (t) assemblages at the expense of coarse tweed t′-phase in the 12Y-PSZ grains. The absence of secondary deformation twins in the t′-phase formed by slow cooling is discussed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00576040
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  • 10
    Digitale Medien
    Digitale Medien
    Sliding wear of Al2O3P/6061 Al composite (1996)
    Springer
    Journal of materials science 31 (1996), S. 3481-3486 
    Details
    ISSN: 1573-4803
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau
    Notizen: Abstract The mild sliding wear behaviour of a 15 vol % Al2O3P/6061 Al composite has been investigated by using a pin-on-disc reciprocating sliding machine. The composite has been shown to exhibit an excellent wear resistance as compared to the unreinforced matrix alloy. The wear rate of the composite under dry wear conditions with a 12N load is approximately one tenth of that in the 6061 aluminium alloy. The wear rate of the composite under lubrication with 15W/40 gear oil under a 100N load is only one thousandth ofthat in the 6061 aluminium alloy. The dry wear resistance of an over-aged sample is shown here to be better than a peak aged or under-aged sample when the composite was aged at 160°C. The coefficient of friction of the composite was approximately 0.5–0.6 under dry conditions and 0.07 in lubricated wear experiments. In the initial stage, the worn surface of the composite under dry conditions is primarily composed of ploughed grooves and ductile tear. The composite makes a conducting contact with the steel pin. The worn surface is composed of compacted powder and the contact potential gradually increases when the period of the wear experiment goes beyond 2 h.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00360752
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