Search Results - (Author, Cooperation:C. C. Cheng)
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1Latest Papers from Table of Contents or Articles in PressStaff View
Publication Date: 2018-01-28Publisher: BMJ PublishingElectronic ISSN: 2044-6055Topics: MedicineKeywords: Oncology, Open accessPublished by: -
2Latest Papers from Table of Contents or Articles in PressM. Y. Li ; Y. Shi ; C. C. Cheng ; L. S. Lu ; Y. C. Lin ; H. L. Tang ; M. L. Tsai ; C. W. Chu ; K. H. Wei ; J. H. He ; W. H. Chang ; K. Suenaga ; L. J. Li
American Association for the Advancement of Science (AAAS)
Published 2015Staff ViewPublication Date: 2015-08-01Publisher: American Association for the Advancement of Science (AAAS)Print ISSN: 0036-8075Electronic ISSN: 1095-9203Topics: BiologyChemistry and PharmacologyComputer ScienceMedicineNatural Sciences in GeneralPhysicsPublished by: -
3Articles: DFG German National LicensesGao, Q. ; Cheng, C. C. ; Chen, P. J. ; Choyke, W. J. ; Yates, J. T.
College Park, Md. : American Institute of Physics (AIP)
Published 1993Staff ViewISSN: 1089-7690Source: AIP Digital ArchiveTopics: PhysicsChemistry and PharmacologyNotes: A combination of experimental methods has been employed for the study of Cl2 adsorption and reaction on Si(100)–(2×1). At 100 K, Cl2 adsorption occurs rapidly to a coverage of ∼0.7 Cl/Si. This is followed by slower adsorption kinetics with further Cl2 exposure. Two Cl adsorption states are observed experimentally. One of the adsorption states is terminally bonded Cl on the inclined dangling bond of the symmetric Si2 dimer sites, with a vibrational frequency, ν(SiCl) of 550∼600 cm−1. These bonded Cl atoms give four off-normal Cl+ ESDIAD emission beams from the orthogonal domains of silicon dimer sites. The Si–Cl bond angle for this adsorption configuration is estimated to be inclined 25°±4° off-normal. The second Cl adsorption state, a minority species, is bridge bonded Cl with ν(Si2Cl) of ∼295 cm−1 which produces Cl+ ion emission along the surface normal direction. Both adsorption states are present at low temperatures. Irreversible conversion from bridge bonded Cl to terminally bonded Cl begins to occur near 300 K; the conversion is complete near ∼673 K. LEED studies indicate that the (2×1) reconstruction for the substrate is preserved for all Cl coverages. The most probable Cl+ kinetic energy in electron stimulated desorption, ESD, is 1.1−+0.30.6 eV. A significant adsorbate-adsorbate quenching effect reducing the Cl+ ion yield in ESD occurs above a Cl(a) coverage of ∼0.5 ML (monolayer) due to interadsorbate interactions. The maximum Cl+ yield is about 4×10−7 Cl+/e at an electron energy of 120 eV. Temperature programmed desorption results show that SiCl2 is the major etching product which desorbs at about 840 K.Type of Medium: Electronic ResourceURL: -
4Articles: DFG German National LicensesCheng, C. C. ; Gao, Q. ; Dohnalek, Z. ; Choyke, W. J. ; Yates, J. T.
College Park, Md. : American Institute of Physics (AIP)
Published 1993Staff ViewISSN: 1089-7690Source: AIP Digital ArchiveTopics: PhysicsChemistry and PharmacologyNotes: Thermal broadening of Cl+ electron stimulated desorption ion angular distribution (ESDIAD) patterns, related to the vibrational motion of the adsorbate, has been investigated by subtraction of patterns measured at different temperatures. In the case of Cl on Si(100), the observed difference pattern between 130 and 305 K indicates that azimuthally isotropic motion of Cl occurs about the most probable Si–Cl bond direction. Equal distributions from the in-plane and out-of-plane bending motions are observed, correlating with the ∼200 cm−1 frequencies associated with these motions.Type of Medium: Electronic ResourceURL: -
5Articles: DFG German National LicensesVerhoeven, J. D. ; Efron, A. ; Gibson, E. D. ; Cheng, C. C.
[S.l.] : American Institute of Physics (AIP)
Published 1986Staff ViewISSN: 1089-7550Source: AIP Digital ArchiveTopics: PhysicsNotes: The tin (Sn) diffusion step for producing Nb3Sn-Cu superconducting wire by the external Sn process was modeled in experiments where either pure Sn or a Cu-Sn alloy was plated on sheets of either pure Cu or a Cu-Sn bronze. Each stage of the three-stage solid-state diffusion process was evaluated and it was found that rows of voids are produced in stage I of the process. These voids coarsen in stages II and III and in the worst case they are observed to coalesce and cause complete spalling away of the Sn-rich diffusion layers. Methods for minimizing void formation and possible causes of the void formation are discussed.Type of Medium: Electronic ResourceURL: -
6Articles: DFG German National LicensesCheng, C. C. ; Wallace, R. M. ; Taylor, P. A. ; Choyke, W. J. ; Yates, J. T.
[S.l.] : American Institute of Physics (AIP)
Published 1990Staff ViewISSN: 1089-7550Source: AIP Digital ArchiveTopics: PhysicsNotes: A convenient kinetic uptake method has been employed to determine the absolute saturation monolayer coverage of C2H2 and C2H4 on a Si(100)(2×1) surface. Such measurements are important for postulating the structure of the chemisorbed hydrocarbon species on this surface. The saturation surface coverage for both chemisorbed molecules at 105 K is 2.5(±0.2)×1014 molecules/cm2 . This number is consistent with 1 hydrocarbon molecule per Si dimer site at monolayer coverage when the role of surface defects on Si(100) is considered. A di-σ bonding model for both molecules is proposed at saturation coverage.Type of Medium: Electronic ResourceURL: -
7Articles: DFG German National LicensesChou, S.-S. ; Lin, Y.-H. ; Cheng, C.-C. ; Hwang, D.-F.
Oxford, UK : Blackwell Publishing Ltd
Published 2002Staff ViewISSN: 1750-3841Source: Blackwell Publishing Journal Backfiles 1879-2005Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, NutritionProcess Engineering, Biotechnology, Nutrition TechnologyNotes: A method of micellar electrokinetic capillary chromatography (MEKC) was developed for simultaneous determination of 14 synthetic colors in soft drinks and confectioneries. The optimal solvent of MEKC method for separating all colors was a mixed solution comprised of 18% acetonitrile and 82% 0.05 M sodium deoxycholate in borate-phosphate buffer (pH 7.8). These colors were well separated within 20 min using 57 cm × 75 micrometer uncoated fused-silica capillary column, operating at 25 kV and detected by UV at 214 nm. The average recovery of all colors spiked into soft drinks and confectionery was better than 82%. The addition of illegal colors was not found after testing 30 samples. In retail foods, the colorant found in highest concentration was tartrazine (155 μLgg/g sample).Type of Medium: Electronic ResourceURL: -
8Articles: DFG German National LicensesStaff View
ISSN: 0020-1693Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002Topics: Chemistry and PharmacologyType of Medium: Electronic ResourceURL: -
9Articles: DFG German National LicensesStaff View
ISSN: 0020-7462Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision MechanicsPhysicsType of Medium: Electronic ResourceURL: -
10Articles: DFG German National LicensesStaff View
ISSN: 0022-328XSource: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002Topics: Chemistry and PharmacologyType of Medium: Electronic ResourceURL: -
11Articles: DFG German National LicensesStaff View
ISSN: 0022-328XSource: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002Topics: Chemistry and PharmacologyType of Medium: Electronic ResourceURL: -
12Articles: DFG German National LicensesStaff View
ISSN: 0009-2614Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002Topics: Chemistry and PharmacologyPhysicsType of Medium: Electronic ResourceURL: -
13Articles: DFG German National LicensesStaff View
ISSN: 0378-4363Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002Topics: PhysicsType of Medium: Electronic ResourceURL: -
14Articles: DFG German National LicensesStaff View
ISSN: 0273-1177Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision MechanicsPhysicsType of Medium: Electronic ResourceURL: -
15Articles: DFG German National LicensesStaff View
ISSN: 0273-1177Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision MechanicsPhysicsType of Medium: Electronic ResourceURL: -
16Articles: DFG German National LicensesStaff View
ISSN: 0273-1177Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision MechanicsPhysicsType of Medium: Electronic ResourceURL: -
17Articles: DFG German National LicensesStaff View
ISSN: 0273-1177Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision MechanicsPhysicsType of Medium: Electronic ResourceURL: -
18Articles: DFG German National LicensesStaff View
ISSN: 1435-1536Source: Springer Online Journal Archives 1860-2000Topics: Chemistry and PharmacologyMechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision MechanicsType of Medium: Electronic ResourceURL: -
19Articles: DFG German National LicensesStaff View
ISSN: 0040-4039Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002Topics: Chemistry and PharmacologyType of Medium: Electronic ResourceURL: -
20Articles: DFG German National LicensesStaff View
ISSN: 0040-4039Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002Topics: Chemistry and PharmacologyType of Medium: Electronic ResourceURL: