Browsing by Issue Date, starting with "2009-04-16"

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Distribution of Vibrational States of CO(2) in the Reaction O((1)D) + CO(2) from Time-Resolved Fourier Transform Infrared Emission Spectra
(2009-04-16)
Chen, Hui-Fen
;
Chiang, Hung-Chu
;
Matsui, Hiroyuki
;
Tsuchiya, Soji
;
Lee, Yuan-Pern
A mixture Of O(3) and CO(2) was irradiated with light from a KrF laser at 248 nm; time-resolved infrared emission Of CO(2) in the region 2000-2400 cm(-1) was observed with a Fourier transform spectrometer. This emission involves one quantum in the asymmetric stretching mode (nu(3)) Of CO(2) in highly vibrationally excited states. The band contour agrees satisfactorily with a band shape calculated based on a simplified polyad model of CO(2) and a vibrational distribution estimated through a statistical partitioning of energy of similar to 13 000 cm(-1), similar to 3100 cm(-1) smaller than the available energy, into the vibrational modes Of CO(2). From this model, approximately 44% and 5% of the available energy of O((1)D) + CO(2) is converted into the vibrational and rotational energy of product CO(2), respectively, consistent with previous reports of similar to 50% for the translational energy. An extent of rotational excitation Of CO(2) much smaller than that expected from statistical calculations indicates a mechanism that causes a small torque to be given to CO(2) when an O atom leaves the complex CO(3) on the triplet exit surface of potential energy, consistent with quantum-chemical calculations.
Method for forming III-nitrides semiconductor epilayer on the semiconductor substrate
(2009-04-16)
Chang, Chun-Yen
;
Yang, Tsung-Hsi
;
Shen, Shih-Guo
GaN layer on semiconductor substrate is grown by using GaN nanorod buffer layer. Firstly, semiconductor substrate is cleaned and thermally degassed to remove the contaminant in the growth chamber. After the above step, the GaN nanorods layer is grown under the N-rich condition. Then, GaN epilayer is overgrown on the GaN nanorods layer under the Ga-rich condition for forming Group of III-Nitrides semiconductor layer on the semiconductor substrate.
於半導體基板上形成三族氮化物半導體層的方法
(2009-04-16)
張俊彥
;
楊宗
;
沈詩國
本發明為一種於半導體基板上形成三族氮化物半導體層的方法。首先,提供一半導體基板,其半導體基板上具有一清潔表面;再形成一氮化鎵奈米柱緩衝層;覆蓋成長形成一氮化鎵磊晶層於氮化鎵奈米柱緩衝層上,藉以形成三族氮化物半導體層於半導體基板上。
Adsorption Configurations and Reactions of Nitric Acid on TiO(2) Rutile (110) and Anatase (101) surfaces
(2009-04-16)
Chang, Ching Yi
;
Chen, Hsin-Tsung
;
Lin, M. C.
;
應用化學系分子科學碩博班
;
Institute of Molecular science
The adsorption and reactions of the monomer and dimer of nitric acid on TiO(2) rutile (110) and anatase (101) surfaces have been studied by first-principles density functional theory with ultrasoft pseudopotential approximation. The most stable configuration of HNO(3) on the rutile surface is a molecular monodentate adsorbed on the 5-fold coordinated Ti atom with the hydrogen bonded to a neighboring surface bridging oxygen with the adsorption energy of 6.7 kcal/mol. It can dissociate its H atom to a nearest bridged oxygen with almost no barrier to produce NO(3)(a) + H(a). The rotation of NO(3) requires a barrier of 12.2 kcal/mol to form the didentate configuration, Ti(5c)-ON(O)-Ti(5c)H-O(2),(a), which adsorbs on two 5-fold coordinated Ti atoms with the adsorption energy of 16.5 kcal/mol. In the case of the adsorption of 2HNO(3) molecules, the most stable configuration, 2(Ti(5c)-ON(O)OH...O(2c)(a)), has a structure similar to two single HNO(3) adsorbates on two 5-fold coordinated Ti atoms with the adsorption energy of 12.8 kcal/mol, which is about twice that of the single HNO(3) molecule. The result suggests that the interaction of the two planar HNO(3) adsorbates is negligible. The dehydration from 2(Ti(5c)-ON(O)OH...O(2)c(a)) forming N(2)O(5)(a) + H(2)O(a) requires an energy barrier of 46.2 kcal/mol, indicating that the dimerization of the two HNO(3)(a) is difficult. Similar adsorption phenomena appear on the anatase (101) surface. In addition, we find that the coadsorption of hydrogen plays a significant role in the adsorption energies of adsorbates, especially for the NO(3) radical, which may be employed as a linker between semiconductor quantum dots such as InN and the TiO(2) surface.
可預測均流程度之斜率控制裝置及其方法
(2009-04-16)
何心欣
;
陳科宏
;
謝俊禹
本發明係揭露一種可預測均流程度之斜率控制裝置及其方法,其可應用於一冗餘或分散式的電源供應系統中,並達到更佳的負載電流分配效果。本發明之裝置包括一轉導放大電路、一斜率調整電路及一電壓遞增電路。本發明利用一轉導參數改善輸出電壓對於輸出電流之斜率,以及利用轉導參數使分散式的電源供應系統中諸電源供應模組具有較佳之相同斜率。本發明更包括動態拉升輸出電壓使輸出電流步進提升,進而達到系統所能承受之範圍。
Distribution of Vibrational States of CO2 in the Reaction O(D-1) + CO2 from Time-Resolved Fourier Transform Infrared Emission Spectra
(2009-04-16)
Chen, Hui-Fen
;
Chiang, Hung-Chu
;
Matsui, Hiroyuki
;
Tsuchiya, Soji
;
Lee, Yuan-Pern
A mixture Of O-3 and CO2 was irradiated with light from a KrF laser at 248 nm; time-resolved infrared emission Of CO2 in the region 2000-2400 cm(-1) was observed with a Fourier transform spectrometer. This emission involves one quantum in the asymmetric stretching mode (nu(3)) Of CO2 in highly vibrationally excited states. The band contour agrees satisfactorily with a band shape calculated based on a simplified polyad model of CO2 and a vibrational distribution estimated through a statistical partitioning of energy of similar to 13 000 cm(-1), similar to 3100 cm(-1) smaller than the available energy, into the vibrational modes Of CO2. From this model, approximately 44% and 5% of the available energy of O(D-1) + CO2 is converted into the vibrational and rotational energy of product CO2, respectively, consistent with previous reports of similar to 50% for the translational energy. An extent of rotational excitation Of CO2 much smaller than that expected from statistical calculations indicates a mechanism that causes a small torque to be given to CO2 when an O atom leaves the complex CO3 on the triplet exit surface of potential energy, consistent with quantum-chemical calculations.
Adsorption Configurations and Reactions of Nitric Acid on TiO2 Rutile (110) and Anatase (101) surfaces
(2009-04-16)
Chang, Ching Yi
;
Chen, Hsin-Tsung
;
Lin, M. C.
;
應用化學系分子科學碩博班
;
Institute of Molecular science
The adsorption and reactions of the monomer and dimer of nitric acid on TiO2 rutile (110) and anatase (101) surfaces have been studied by first-principles density functional theory with ultrasoft pseudopotential approximation. The most stable configuration of HNO3 on the rutile surface is a molecular monodentate adsorbed on the 5-fold coordinated Ti atom with the hydrogen bonded to a neighboring surface bridging oxygen with the adsorption energy of 6.7 kcal/mol. It can dissociate its H atom to a nearest bridged oxygen with almost no barrier to produce NO3(a) + H(a). The rotation of NO3 requires a barrier of 12.2 kcal/mol to form the didentate configuration, Ti-5c-ON(O)-Ti5cH-O-2,(a), which adsorbs on two 5-fold coordinated Ti atoms with the adsorption energy of 16.5 kcal/mol. In the case of the adsorption of 2HNO(3) molecules, the most stable configuration, 2(Ti-5c-ON(O)OH...O-2c(a)), has a structure similar to two single HNO3 adsorbates on two 5-fold coordinated Ti atoms with the adsorption energy of 12.8 kcal/mol, which is about twice that of the single HNO3 molecule. The result suggests that the interaction of the two planar HNO3 adsorbates is negligible. The dehydration from 2(Ti-5c-ON(O)OH...O(2)c(a)) forming N2O5(a) + H2O(a) requires an energy barrier of 46.2 kcal/mol, indicating that the dimerization of the two HNO3(a) is difficult. Similar adsorption phenomena appear on the anatase (101) surface. In addition, we find that the coadsorption of hydrogen plays a significant role in the adsorption energies of adsorbates, especially for the NO3 radical, which may be employed as a linker between semiconductor quantum dots such as InN and the TiO2 surface.
Using sweeping micellar electrokinetic chromatography to analyze Delta(9)-tetrahydrocannabinol and its major metabolites
(2009-04-17)
Su, Hsiu-Li
;
Feng, Lan-Ing
;
Jen, Hsiu-Ping
;
Hsieh, You-Zung
;
應用化學系
We have applied sweeping micellar electrokinetic chromatography (sweeping-MEKC) to the simultaneous determination of Delta(9)-tetrahydrocannabinol (THC) and its major metabolites, 11-hydroxy-Delta(9)-tetrahydrocannabinol (THC-OH) and 11-nor-9-carboxy-Delta(9)-tetrahydrocannabinol (THC-COOH). We monitored the effects of several of the sweeping-MEKC parameters, including the proportion of organic modifier, the concentration of sodium dodecyl sulfate (SDS), the pH, and the sample injection volume, to optimize the separation process. The optimal buffer for the analysis of the three analytes was 25 mM citric acid/disodium hydrogenphosphate (pH 2.6) containing 40% methanol and 75 mM SDS. Under the optimized separation parameters, the enrichment factors for THC, THC-COOH, and THC-OH when using sweeping-MEKC (relative to MEKC) were 77,139, and 200, respectively. The limits of detection (LODs) for the three compounds in standard solutions ranged from 3.87 to 15.2 ng/mL. We combined the sweeping-MEKC method with solid-phase extraction to successfully detect THC, THC-COOH, and THC-OH in human urine with acceptable repeatability. The LODs of these analytes in urine samples ranged from 17.2 to 23.3 ng/mL. Therefore, this sweeping-MEKC method is useful for determining, with high sensitivity, the amounts of THC and its metabolites in the urine of suspected THC users. (C) 2008 Elsevier B.V. All rights reserved.
《千年狐》韓國動畫新里程
(2009-04-19)
陳妙寧
;
Department of Communication and Technology
;
傳播與科技學系
0
不平凡人生　舞出新自我
(2009-04-19)
洪上筑
;
Department of Communication and Technology
;
傳播與科技學系
憑著一股對街舞的喜愛，在工作之餘，小Ｐ的所有時間都投入了街舞工作室，並且成為學生們眼中最崇拜的老師。
最後的花
(2009-04-19)
洪效凡
;
Department of Communication and Technology
;
傳播與科技學系
停止了。紅綠燈的秒數維持在倒數七秒，河邊公園的風箏停在半空中，正要跌倒的小女孩停在四十五度角，戴粗框眼鏡的男高中生吹出的口香糖剛好破掉。週圍的人都沒有繼續動作，時間忽然停下來了。停在半空中的我，聽到的，只是一片寂靜。
我一個人離鄉背景這麼遠...
(2009-04-19)
余建良
;
Department of Communication and Technology
;
傳播與科技學系
(茶)
兩性教育過時？影展落幕
(2009-04-19)
徐苾芬
;
Department of Communication and Technology
;
傳播與科技學系
兩性影展
印度衝擊之路　女性向前行
(2009-04-19)
陳怡秀
;
Department of Communication and Technology
;
傳播與科技學系
後來發現最近剛好是印度大選，所以改題目，請見諒
原住民畫家畫「家」
(2009-04-19)
黃湘茹
;
Department of Communication and Technology
;
傳播與科技學系
...
桃源，冥。
(2009-04-19)
趙祿平
;
Department of Communication and Technology
;
傳播與科技學系
123
龍文化-遠古華夏之龍
(2009-04-19)
何宛芯
;
Department of Communication and Technology
;
傳播與科技學系
Testing...
桔醬滋味　勾起母親的味道
(2009-04-19)
王成宇
;
Department of Communication and Technology
;
傳播與科技學系
公視人生劇展
狂熱解題　數學小王子李讀修
(2009-04-19)
楊雅筑
;
Department of Communication and Technology
;
傳播與科技學系
採訪電工系3年級李讀修他是個數學狂熱的傢伙
台灣飲食在澳門
(2009-04-19)
梁素茵
;
Department of Communication and Technology
;
傳播與科技學系
123