Browsing by Issue Date, starting with "2006-09-04"

Now showing 1 - 20 of 62744

Study of hole concentration of 1,4-bis[N-(1-naphthyl)-N-'-phenylamino]-4,4(') diamine doped with tungsten oxide by admittance spectroscopy
(2006-09-04)
Hsieh, Ming-Ta
;
Chang, Chan-Ching
;
Chen, Jenn-Fang
;
Chen, Chin H.
;
電子物理學系
The effect of tungsten oxide (WO3) incorporation into 1,4-bis[N-(1-naphthyl)-N-'-phenylamino]-4,4(') diamine (NPB) layer is investigated in NPB-tris(8-hydroxyquinoline)aluminium heterojunction organic light-emitting diodes. The admittance spectroscopy studies show that increasing the WO3 volume percentage from 0% to 16% can increase the hole concentration of the NBP layer from 1.97x10(14) to 1.90x10(17) cm(-3) and decrease the activation energy of the resistance of the NPB layer from 0.354 to 0.176 eV. Thus, this incorporation reduces the Ohmic loss and increases the band bending in the NBP layer near the interface, resulting in an improved hole injection via tunneling through a narrow depletion region. (c) 2006 American Institute of Physics.
Lithium manganese oxide as an effective buffer layer between organic and metal layers in organic light-emitting devices
(2006-09-04)
Liu, Tswen-Hsin
;
光電工程學系
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Department of Photonics
Tris(8-hydroxyquinolinato)aluminum (Alq(3))-based organic light-emitting devices using a thermally deposited lithium manganese oxide layer between aluminum (Al) cathode and Alq(3) have been fabricated. The highest luminance efficiency obtained with a 1-nm-thick LiMnxOy layer is very similar to that of the device with 1-nm-thick LiF. However, the device with an 18 nm LiMnxOy layer obtained a longer operational stability although the luminance efficiency is lower. The improvements are attributed to lithium extractions of the lithium manganese oxide layer and the interfacial properties between Alq(3) and Al are discussed. (c) 2006 American Institute of Physics.
Model to determine the self-resonant frequency of micromachined spiral inductors
(2006-09-04)
Chen, C. C.
;
Lin, Cheng-De
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Cheng, Y. T.
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電子工程學系及電子研究所
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Department of Electronics Engineering and Institute of Electronics
This letter presents an approach to characterize electron behaviors within polygonal micromachined spiral inductors in which self-resonance occurs. Combining with the concepts of anomalous dispersion, standing wave, and field scattering, the self-resonant frequency of the microinductors can be calculated by means of an associated analytical model. According to this model the self-resonant frequency (SRF) can be derived as the "free electron" frequency of the inductor material. Simulation and measurement results validate that the model can provide a satisfactory prediction to the SRF of polygonal micromachined spiral inductors. (c) 2006 American Institute of Physics.
Isometric path numbers of graphs
(2006-09-06)
Pan, Jun-Jie
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Chang, Gerard J.
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應用數學系
;
Department of Applied Mathematics
An isometric path between two vertices in a graph G is a shortest path joining them. The isometric path number of G, denoted by ip(G), is the minimum number of isometric paths needed to cover all vertices of G. In this paper, we determine exact values of isometric path numbers of complete r-partite graphs and Cartesian products of 2 or 3 complete graphs. (c) 2006 Elsevier B.V. All rights reserved.
茶與詩對話
(2006-09-08)
錢震宇
ORGN 608-Enzymatic formation of multiple triterpenes by mutation of histidine 234 of the oxidosqualene-lanosterol cyclase from saccharomyces cerevisiae
(2006-09-10)
Liu, Yuan-Ting
;
Wu, Tung-Kung
;
生物科技學系
;
Department of Biological Science and Technology
POLY 162-Electroluminescence from a conjugated polymer grafted with CdSe/ZnS quantum dots: High brightness and improved efficiency
(2006-09-10)
Chen, Kuei-Bai
;
Chen, Ming-Hwey
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Yang, Sheng-Hsiung
;
Hsu, Chain-Shu
;
Chen, Chia-Chun
Relativistic parameterization of the SCC-DFTB method
(2006-09-10)
Witek, Henryk A.
;
應用化學系
;
應用化學系分子科學碩博班
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Department of Applied Chemistry
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Institute of Molecular science
ORGN 611-Molecular cloning and inhibition studies of oxidosqualene-lanosterol cyclase from bovine liver using a novel Ro48-8071 based fluorescence probe
(2006-09-10)
Chang, Cheng-Hsiang
;
Wu, Tung-Kung
;
生物科技學系
;
Department of Biological Science and Technology
Phase geographical map for determining the material type of a right-angle prism
(2006-09-10)
Chiu, Ming-Hung
;
Lai, Chih-Wen
;
Wang, Shinn-Fwu
;
Su, Der-Chin
;
Chang, Springfield
A phase geographical map for determining a right-angle prism is presented. The proposed method is based on total-internal-reflection effects and chromatic dispersion. Under the total-internal-reflection condition, the phase difference between the S and P polarizations, as a function of the wavelength and refractive index, can be extracted and measured using heterodyne interferometry. Various wavelengths correspond to various refractive index values. The proposed map is convenient in ensuring the prism material using a specific V number. The method has the following merits: high stability, ease of operation, and rapid measurement. (c) 2006 Optical Society of America.
Characterization of a bi-functional protein with hemolysin and ABC transporter activity
(2006-09-10)
Wang, Yu Kuo
;
Wu, Tung Kung
;
生物科技學系
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Department of Biological Science and Technology
INOR 740-Fabrication of novel TiO2 photocatalysts with bone-skin-like porous structures
(2006-09-10)
Chang, Sue-Min
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Sung, Ping-Shing
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Hou, Chieh-yao
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環境工程研究所
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Institute of Environmental Engineering
PMSE 594-New class of biomaterials made from natural building blocks: Saccharide-peptide hybrid copolymers
(2006-09-10)
Hsieh, Kuo-Huang
;
Lin, Shih-Pin
;
Han, Jin-Lin
;
Yeh, Jen-Taut
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Chang, Feng-Chih
ORGN 610-Identification of a putative active site residue within oxidosqualene-lanosterol cyclase from saccharomyces cerevisiae that influences B/C ring cyclization
(2006-09-10)
Li, Wen-Hsuan
;
Wu, Tung-Kung
;
生物科技學系
;
Department of Biological Science and Technology
ORGN 609-Site-saturated mutagenesis of phenylalanine 445 of saccharomyces cerevisiae oxidosqualene-lanosterol cyclase results in production of isomalabaricane triterpenoid and parkeol
(2006-09-10)
Wu, Tung-Kung
;
Liu, Yuan-Ting
;
Chiu, Feng-Hsuan
;
生物科技學系
;
Department of Biological Science and Technology
PMSE 421-Study of the adsorption of a cationic surfactant on photoresist surfaces
(2006-09-10)
Chang, Sue-Min
;
Cheng, Han-Yun
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Kao, I-Ling
;
Doong, Ruey-An
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環境工程研究所
INOR 736-Calcination effect on the physicochemical properties of TOPO-capped ZrxTi1-xO2 nanocrystals
(2006-09-10)
Chang, Sue-min
;
Hou, Chieh-yao
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Sung, Ping-shing
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環境工程研究所
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Institute of Environmental Engineering
BIOT 373-Artificial myoglobin system design for electron transfer mechanism study and BioSolar cell applications
(2006-09-10)
Chang, Chin-Hao
;
Wu, Tung-Kung
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Diau, Eric Wei Guang
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Luo, Li-Yang
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生物科技學系
管管演詩
(2006-09-10)
慧珠
Characterization of O-2-CeO2 interactions using in situ Raman spectroscopy and first-principle calculations
(2006-09-11)
Choi, Y. M.
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Abernathy, Harry
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Chen, Hsin-Tsung
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Lin, M. C.
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Liu, Meilin
Interactions between O-2 and CeO2 are examined experimentally using in situ Raman spectroscopy and theoretically using density-functional slob-model calculations. Two distinct oxygen bonds appear at 825 and 1131 cm(-1), corresponding to peroxo- and superoxo-like species, respectively, when partially reduced CeO2 is exposed to 10% O-2. Periodic density-functional theory (DFT) calculations aid the interpretation of spectroscopic observations and provide energetic and geometric information for the dioxygen species adsorbed on CeO2. The O-2 adsorption energies on unreduced CeO2 surfaces ore endothermic (0.91 < Delta E-ads < 0.98 eV), while those on reduced surfaces are exothermic (-4. 0 < Delta E-ads < -0.9 eV), depending on other relevant surface processes such as chemisorption and diffusion into the bulk. Partial reduction of surface Ce4+ to Ce3+ (together with formation of oxygen vacancies) alters geometrical parameters and, accordingly, leads to a shift in the vibrational frequencies of adsorbed oxygen species compared to those on unreduced CeO2. Moreover, the location of oxygen vacancies affects the formation and subsequent dissociation of oxygen species on the surfaces. DFT predictions of the energetics support the experimental observation that the reduced surfaces are energetically more favorable than the unreduced surfaces for oxygen adsorption and reduction.