Browsing by Issue Date, starting with "2019-08-18"

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循環型 DIY環保都市農園教材開發與實作
(2019-08-18)
高正忠
;
國立交通大學環境工程研究所
High-temperature superconductivity in single unit cell layer FeSe due to soft phonons in the interface layer of the SrTiO3 substrate
(2019-08-19)
Rosenstein, Baruch
;
Shapiro, B. Ya
;
電子物理學系
;
Department of Electrophysics
Using a microscopic model of lattice vibrations in the STO(001) substrate, an additional Omega(s) = 50 meV longitudinal optical (LO) interface mode is identified. The soft mode propagating mainly in the first TiO2 layer ("O chains") has stronger electron-phonon coupling to electron gas in FeSe than a well-known Omega(h) = 100 meV hard mode. The coupling constant, critical temperature, and replica band are calculated. Although there exists a forward in the electron-phonon scattering peak, it is clearly not as sharp as assumed in recent theories (delta-function-like). The critical temperature is obtained by solution of the gap equation and agrees with the observed one. The corresponding electron phonon coupling constant lambda = 0.23. The quasiparticle normal state "satellite" in spectral weight is broad and its peak appears at frequency much higher than Omega(s) consistent with observations usually associated with Omega(h). Possible relation of the transversal counterpart of the surface LO soft mode with known phonons is discussed.
Thickness dependence of the anomalous Hall effect in thin films of the topological semimetal Co2MnGa
(2019-08-19)
Markou, Anastasios
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Kriegner, Dominik
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Gayles, Jacob
;
Zhang, Liguo
;
Chen, Yi-Cheng
Topological magnetic semimetals promise large Berry curvature through the distribution of the topological Weyl nodes or nodal lines and further novel physics with exotic transport phenomena. We present a systematic study of the structural and magnetotransport properties of Co2MnGa films from thin (20 nm) to bulklike behavior (80 nm) in order to understand the underlying mechanisms and the role of topology. The magnetron sputtered Co2MnGa films are L2(1)-ordered showing very good heteroepitaxy and a strain-induced tetragonal distortion. The anomalous Hall conductivity was found to be maximum at a value of 1138 S/cm, with a corresponding anomalous Hall angle of 13%, which is comparatively larger than topologically trivial metals. There is good agreement between the theoretical calculations and the Hall conductivity observed for the 80 nm film, which suggests that the effect is intrinsic. Thus, the Co2MnGa compound manifests as a promising material for topologically driven spintronic applications.
Ammonia photosynthesis via an association pathway using a plasmonic photoanode and a zirconium cathode
(2019-08-21)
Oshikiri, Tomoya
;
Ueno, Kosei
;
Misawa, Hiroaki
;
交大名義發表
;
National Chiao Tung University
Most conventional photoelectrochemical-based methods for synthesizing NH3 show low selectivity due to the generation of H-2 as a by-product. In principle, two types of reaction mechanisms can occur in the reduction of N-2 to NH3. One is an associative pathway in which N-2 molecules on the catalyst are hydrogenated. The other is a dissociative pathway in which nitrogen and hydrogen react after the cleavage of the strong N-2 triple bond. Understanding the mechanism of NH3 formation on the electrode will facilitate the development of selective and efficient NH3 synthesis techniques. In this study, we constructed a two-electrode system composed of a strontium titanate photocatalytic anode in which the plasmon effect is expressed by plasmonic gold nanoparticles and a zirconium cathode, which was connected to the external circuit to investigate the reaction by electrochemical analysis in addition to analysis of the product. The bias and pH dependences of the reaction were then systematically investigated, and the plasmon-induced synthesis of NH3 on Zr was proposed to proceed via an associative pathway.
Intelligent whole-blood imaging flow cytometry for simple, rapid, and cost-effective drug-susceptibility testing of leukemia
(2019-08-21)
Kobayashi, Hirofumi
;
Lei, Cheng
;
Wu, Yi
;
Huang, Chun-Jung
;
Yasumoto, Atsushi
Drug susceptibility (also called chemosensitivity) is an important criterion for developing a therapeutic strategy for various cancer types such as breast cancer and leukemia. Recently, functional assays such as high-content screening together with genomic analysis have been shown to be effective for predicting drug susceptibility, but their clinical applicability is poor since they are time-consuming (several days long), labor-intensive, and costly. Here we present a highly simple, rapid, and cost-effective liquid biopsy for ex vivo drug-susceptibility testing of leukemia. The method is based on an extreme-throughput (>1 million cells per second), label-free, whole-blood imaging flow cytometer with a deep convolutional autoencoder, enabling image-based identification of the drug susceptibility of every single white blood cell in whole blood within 24 hours by simply flowing a drug-treated whole blood sample as little as 500 mu L into the imaging flow cytometer without labeling. Our results show that the method accurately evaluates the drug susceptibility of white blood cells from untreated patients with acute lymphoblastic leukemia. Our method holds promise for affordable precision medicine.
A unified model of mean-time-to-failure for electromigration, thermomigration, and stress-migration based on entropy production
(2019-08-21)
Tu, K. N.
;
Gusak, A. M.
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國際半導體學院
;
International College of Semiconductor Technology
We have revisited Black's equation of mean-time-to-failure (MTTF) for electromigration from the viewpoint that in irreversible processes, entropy production is the controlling behavior. We justify that the power factor on current density is n = 2, as given in the original Black's equation. Furthermore, on the basis of entropy production, we provide a unified model of MTTF for thermomigration and stress-migration. We note that up to now, no MTTF for thermomigration and stress-migration is given. Published under license by AIP Publishing.
Surface Micro-/Nanotextured Hybrid PEDOT:PSS-Silicon Photovoltaic Cells Employing Kirigami Graphene
(2019-08-21)
Huang, Chi-Hsien
;
Chen, Zih-Yang
;
Chiu, Chi-Ling
;
Huang, Tzu-Ting
;
Meng, Hsin-Fei
Kirigami graphene allows a two-dimensional material to transform into a three-dimensional structure, which constitutes an effective transparent electrode candidate for photovoltaic (PV) cells having a surface texture. The surface texture of an inverted pyramid was fabricated on a Si substrate using photolithography and wet etching, followed by metal-assisted chemical etching to obtain silicon nanowires on the surface of the inverted pyramid. Kirigami graphene with a cross-pattern array was prepared using photolithography and plasma etching on a copper foil. Then, kirigami graphene was transferred onto hybrid heterojunction PV cells with a poly(ethylene terephthalate)/silicone film. These cells consisted of poly(3,4-ethylenedioxythiophene) poly(styrenesulfonate)-(PEDOT:PSS) as the p-type semiconductor, Si(100) as the inorganic n-type semiconductor, and a silver comb electrode on top of PEDOT:PSS. The conductivity of PEDOT:PSS was greatly improved. This improvement was significantly higher than that achieved by the continuous graphene sheet without a pattern. Transmission electron microscopy and Raman spectroscopy results revealed that the greater improvement with kirigami graphene was due to the larger contact area between PEDOT:PSS and graphene. By using two-layer graphene having a kirigami pattern, the power conversion efficiency, under simulated AM1.5G illumination conditions, was significantly augmented by up to 9.8% (from 10.03 to 11.01%).
Quantifying the nonclassicality of pure dephasing
(2019-08-22)
Chen, Hong-Bin
;
Lo, Ping-Yuan
;
Gneiting, Clemens
;
Bae, Joonwoo
;
Chen, Yueh-Nan
One of the central problems in quantum theory is to characterize, detect, and quantify quantumness in terms of classical strategies. Dephasing processes, caused by non-dissipative information exchange between quantum systems and environments, provides a natural platform for this purpose, as they control the quantum-to-classical transition. Recently, it has been shown that dephasing dynamics itself can exhibit (non)classical traits, depending on the nature of the system-environment correlations and the related (im)possibility to simulate these dynamics with Hamiltonian ensembles-the classical strategy. Here we establish the framework of detecting and quantifying the nonclassicality for pure dephasing dynamics. The uniqueness of the canonical representation of Hamiltonian ensembles is shown, and a constructive method to determine the latter is presented. We illustrate our method for qubit, qutrit, and qubit-pair pure dephasing and describe how to implement our approach with quantum process tomography experiments. Our work is readily applicable to present-day quantum experiments.
Exploring candidate biological functions by Boolean Function Networks for Saccharomyces cerevisiae (vol 12, e0185475, 2017)
(2019-08-22)
Simak, Maria
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Yeang, Chen-Hsiang
;
Lu, Henry Horng-Shing
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生物資訊及系統生物研究所
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Institude of Bioinformatics and Systems Biology
Recovery of sulfuric acid from piranha solution over a dimensionally stable anode (DSA) Ti-RuO2 electrode and beyond
(2019-08-25)
Carretero, Daniel Sanchez
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Huang, Chih-Pin
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Huang, Chin-Pao
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交大名義發表
;
National Chiao Tung University
Effect of adding graphene oxide composite on the performance of anammox for nitrogen removal
(2019-08-25)
Huang, Tsung-Hsien
;
Tung, Fang-Tsen
;
Lin, Jih-Gaw
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Chen, Wei-Hsiang
;
環境工程研究所
AgAu alloy nanoshell: Decorated BaTiO3/TiO2 and SrTiO3/TiO2 for photoelectrochemical catalysis
(2019-08-25)
Chang, Yung-Shan
;
Lee, T. Randall
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Hsu, Yung-Jung
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Medhi, Riddhiman
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Srinoi, Pannaree
Roles of surface properties of amorphous TiO2 in photocatalytic CO2 reduction
(2019-08-25)
Kharade, Aparna
;
Chang, Sue-Min
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環境工程研究所
;
Institute of Environmental Engineering
Imprinted copolymer/SiO2 hybrid for selective adsorption of bisphenol A
(2019-08-25)
Chin, Kae Zheng
;
Chang, Sue-Min
;
環境工程研究所
;
Institute of Environmental Engineering
Mono- and bis-norbornene annulated biarylamines through pseudo-Catellani intermediates by Pd-catalyzed C-H activation
(2019-08-25)
Chuang, Shih-Ching
;
交大名義發表
;
National Chiao Tung University
Selective electrocatalytic N2 reduction to ammonia by bimetallic nanocrystal
(2019-08-25)
Talukdar, Biva
;
Kuo, Chun-Hong
;
應用化學系
;
Department of Applied Chemistry
Using two diarylacetylenes as an implicit benzofulvene for benzofulvenation of o-arylanilines through palladium-catalyzed C-H bond activation
(2019-08-25)
Chuang, Shih-Ching
;
交大名義發表
;
National Chiao Tung University
Eclipsed digermylenes as building blocks to construct catenated multinuclear germanium chains and rings
(2019-08-25)
Wey, Yu-Te
;
Huang, Guo-Tao
;
Yu, Jen-Shiang
;
Tsai, Yi-Chou
;
生物科技學系
Functionalization of graphene oxide film with Au and MoOx nanoparticles as efficient p-contact electrode for perovskite solar cells
(2019-08-25)
Bhosale, Sumit
;
Diau, Eric
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應用化學系
;
Department of Applied Chemistry
Solar H2 production: CuGa1-xFexO2-carbon nitride as a novel p-n heterojunction for photocatalytic water-splitting
(2019-08-25)
Martinez, Benjamin
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Kuo, Chun-Hong
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應用化學系
;
Department of Applied Chemistry