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Antibody‐Based Therapeutics: Ultrasensitive NIR‐SERRS Probes with Multiplexed Ratiometric Quantification for In Vivo Antibody Leads Validation (Adv. Healthcare Mater. 4/2018)

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Advanced Healthcare Materials 2018年第4期7卷

作者： Homan Kang Sinyoung Jeong Ahla Jo Hyejin Chang Jin‐Kyoung Yang Cheolhwan Jeong San Kyeong Youn Woo Lee Animesh Samanta Kaustabh Kumar Maiti Myeong Geun Cha Taek‐Keun Kim Sukmook Lee Bong‐Hyun Jun Young‐Tae Chang Junho Chung Ho‐Young Lee Dae Hong Jeong Yoon‐Sik Lee Interdisciplinary Program in Nano‐Science and Technology Seoul National University Seoul 08826 Republic of Korea Department of Chemistry Education Seoul National University Seoul 08826 Republic of Korea Department of Nuclear Medicine Seoul National University Bundang Hospital Seongnam 13620 Republic of Korea School of Chemical and Biological Engineering Seoul National University Seoul 08826 Republic of Korea Department of Chemistry and MedChem Program of Life Sciences Institute National University of Singapore Singapore 117543 Singapore Laboratory of Molecular Cancer Therapeutics Scripps Korea Antibody Institute Hyoja‐2‐dong Chuncheon‐si Gangwon‐do 24341 Republic of Korea Department of Bioscience and Biotechnology Konkuk University Seoul 05029 Republic of Korea Department of Chemistry Pohang University of Science and Technology (POSTECH) Pohang 37673 Republic of Korea Cancer Research Institute Seoul National University College of Medicine Seoul 03080 Republic of Korea

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Ab initio study of the PbTaSe2-related superconducting topological metals

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Physical Review B 2016年第16期94卷 165148-165148页

作者： Peng-Jen Chen Tay-Rong Chang Horng-Tay Jeng Department of Physics National Taiwan University Taipei 10617 Taiwan Nano Science and Technology Program Taiwan International Graduate Program Academia Sinica Taipei 11529 Taiwan and National Taiwan University Taipei 10617 Taiwan Institute of Physics Academia Sinica Taipei 11529 Taiwan Department of Physics National Tsing Hua University Hsinchu 30013 Taiwan

Recent reports have demonstrated the Z2 topological property of the superconductor PbTaSe2 (Tc∼3.8 K). PbTaSe2 simultaneously exhibits superconductivity and nontrivial Z2 topology without the need for doping or proximity effect. Scanning tunneling microscopy confirms that the topological surface states are gapped by superconductivity, indicating the likelihood of the chiral px+ipy pairing mechanism. Motivated by these exciting findings, we predict by means of the first-principles scheme that ABSe2 (A=Pb or Sn and B=Ta or Nb) is also a superconductor with nontrivial Z2 topology. Among these, SnNbSe2 shows the highest Tc∼7.0 K. Due to the fact that the required energy resolution to detect the Majorana bound states is of the order of Δ2/ɛF, the predicted higher Tc of ABSe2 may help mitigate some experimental challenges and provides a better platform for the exploration of the topological superconductivity.

关键词： First-principles calculations Superconductors Topological materials Density functional calculations

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Nickel nanocluster Loaded Black Titania for Photocatalytic Reduction of CO2 into Solar Fuels: Computational and Experimental Studies

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ECS Meeting Abstracts 2017年第52期MA2017-02卷

作者： Tadesse Billo Reta Fang-Yu Fu Putikam Raghunath Indrajit Shown Wei-Fu Chen Tzu-Hsien Shen M.C. Lin Chih-Hao Lee Jih-Shang Hwang Li-Chyong Chen Kuei-Hsien Chen Inst.of Atomic and Molecular Sci Academia Sinica Nano Science and Technology Program Academia Sinica Institute of Optoelectronic Science NTOU Center for Condensed Matter Sciences NTU Center for Interdisciplinary Molecular Science NCTU Inst. of Atomic and Molecular Sci. Academia Sinica National Taiwan University Inst. of Atomic and Molecular Sciences Academia Sinica Dept of Engineering and System Science NTHU CCMS National Taiwan University

The conversion of atmospheric carbon dioxide (CO2) into solar fuels by imitation of a natural photosynthesis using only water vapor and sunlight for energy has attracted widespread attention recently. One of the key challenges is to design a photocatalyst that can bind and activate the CO2 molecule with smallest possible activation energy and produce selective solar fuel production. In this contribution, we report a combined experimental and computational studies on Ni nanocluster loaded black TiO2 (Ni@TiO2[Vo]) with built-in dual active sites for selective photocatalytic CO2 conversion. Our findings reveal that, the synergistic effect of deliberately induced unsaturated Ni nanocluster and oxygen vacancies provide (1) energetically stable CO2 binding sites with lowest activation energy (0.08eV), (2) highly reactive sites, (3) fast electron transfer pathway, (4) enhanced light harvesting by lowering the band gap. The Ni@TiO2[Vo] photocatalyst has demonstrated highly selective and enhanced photocatalytic activity of more than 18 times higher solar fuel production than the commercial TiO2 (P-25). An insight to the mechanism of interfacial charge transfer and product formation mechanism are explored. The proposed approach to adsorb and activate CO2 molecule on dual active sites can be applied to design other catalysts for photocatalytic CO2 reduction.

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Field-induced diffraction in polymer-stabilized in-plane switching liquid crystals with vertical alignment

Field-induced diffraction in polymer-stabilized in-plane swi...

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2015 SID International Symposium

作者： Weng, Libo Lee, Seung Hee Chien, Liang-Chy Chemical Physics Interdisciplinary Program Liquid Crystal Institute Kent State University KentOH United States Department of BIN Fusion Technology Department of Polymer Nano-Science and Technology Chonbuk National University Jeonju Jeonbuk Korea Republic of

A liquid crystal device which shows the capacity to perform as an electrical switchable diffraction grating is demonstrated. Periodical modulation in field-induced refractive index was realized in the in-plane switching liquid crystal device with vertical alignment, which resulted in distinct voltage-dependent diffraction patterns. © 2015 SID.

关键词： Diffraction

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Ion Specificity on Electric Energy Generated by Flowing Water Droplets

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Angewandte Chemie 2017年第8期130卷

作者： Junwoo Park Suhwan Song ChaeHo Shin YoungJun Yang Stefan A. L. Weber Eunji Sim Youn Sang Kim Program in Nano Science and Technology Graduate School of Convergence Science and Technology Seoul National University Seoul 08826 Republic of Korea Department of Chemistry Yonsei University 50 Yonsei-ro Seodaemun-gu Seoul 03722 Korea Division of Industrial Metrology Korea Research Institute of Standards and Science Daejeon 34113 Republic of Korea Max Planck Institute for Polymer Research Ackermannweg 10 55128 Mainz Germany Institute of Physics Johannes Gutenberg University Mainz Duesbergweg 10–14 55128 Mainz Germany Advanced Institutes of Convergence Technology 864-1 Iui-dong Yeongtong-gu Suwon-si Gyeonggi-do 16229 Republic of Korea

The development of energy‐conversion devices using water movement has actively progressed. Ionovoltaic devices, which are driven by ion dynamics, show ion specificity by which different ions with identical charges show different output performance. However, the ion specificity remains poorly understood because the influence of the ion species on generated electric signals is not elucidated. The ion specificity in electric signals induced by flowing water droplet was investigated in terms of its relationship with the potential profile across the solid–liquid interface.

关键词： Energieumwandlung Fest-flüssig-Grenzflächen Ionenspezifität Ionovoltaische Funktionseinheiten

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Site-Specifically modified recombinant human granulocyte colony-stimulating factor with polyethylene glycol

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Biotechnology 2015年第4期14卷 200-205页

作者： Park, See-Hyoung Program in Nano Science and Technology Department of Transdisciplinary Studies Graduate School of Convergence Science and Technology Seoul National University Suwon443-270 Korea Republic of

To prepare PEGylated recombinant human granulocyte colony-stimulating factor (rHuG-CSF) with enhanced pharmacokinetic properties we prepared a cysteine-substituted mutant of rHuG-CSF (mrHuG-CSF). For site-specific PEGylation of mrHuG-CSF Threonine 134 residue that is one of the glycosylation sites and thought not to be critical in structure and function of rHuG-CSF was substituted by Cysteine. Also, Cysteine 17 residue at N-terminus that does not make di-sulfide bonds and is partially buried was substituted by Serine. This mrHuG-CSF was then site-specifically conjugated with 5 or 20 kDa of polyethylene glycol-maleimide and the correct molecular weight of the conjugates was confirmed by MALDI-TOF mass spectrometry analysis. Compared with unmodified rHuG-CSF, both PEGylated mrHuG-CSF showed similar biological activities in vitro and the plasma half-life of the 20 kDa PEGylated mrHuG-CSF was about 5-folds increased. Taken together, site-specific PEGylation of mrHuG-CSF may increase their therapeutic potency in humans. © 2015 Asian Network for Scientific Information.

关键词： Pharmacokinetics

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Large-Scale purification of human apolipoprotein kringle domain V (rhualkv) expressed in pichia pastoris

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Biotechnology 2015年第4期14卷 206-210页

Human apolipoprotein kringle domain V (rHualkV) that has an anti-angiogenic activity was expressed and purified in large scale from Pichia pastoris. rHualkV was captured by SP-Streamline resin directly from 40 L culture broth through batch type adsorption with about 80% yield (n = 8). Captured rHualkV was further purified by SP-Sepharose column chromatography and concentrated by membrane filtration. On average 5 g of rHualkV was purified per batch with the 56% final yield. The result of analytical High-Performance Liquid Chromatography (HPLC) of the purified rHualkV showed the single peak. ESI mass-spectrometry analysis of the rHualkV has proved that the purified rHualkV has the 9676 kDa that is the correct molecular weight as the one calculated by amino acid sequence. In addition, rHualkV has the same N and C-terminal residue as the expected one from DNA sequence of rHualkV gene in Pichia pastoris. Thus, through three steps of process, the anti-angiogenic rHualkV was successfully expressed and purified from Pichia pastoris, which will be able to provide a basis for much larger expression and purification for production needed for clinical evaluation later. © 2015 Asian Network for Scientific Information.

关键词： Purification

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Hierarchical Assemblies: One‐Step Hierarchical Assembly of Spheres‐in‐Lamellae nanostructures from Solvent‐Annealed Thin Films of Binary Diblock Copolymer Micelles (Adv. Funct. Mater. 17/2017)

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Advanced Functional Materials 2017年第17期27卷

作者： Se Hee Kim Kookheon Char Seong Il Yoo Byeong‐Hyeok Sohn Interdisciplinary Program in Nano Science and Technology Seoul National University Seoul 151‐747 Korea School of Chemical and Biological Engineering The National Creative Research Initiative Center for Intelligent Hybrids Seoul National University Seoul 151‐747 Korea Department of Polymer Engineering Pukyong National University Busan 608‐739 Korea Department of Chemistry Seoul National University Seoul 151‐747 Korea

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Discrete unified gas kinetic scheme for all Knudsen number flows. II. Thermal compressible case

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Physical Review E 2015年第3期91卷 033313-033313页

作者： Zhaoli Guo Ruijie Wang Kun Xu State Key Laboratory of Coal Combustion Huazhong University of Science and Technology Wuhan 430074 China Department of Mathematics Hong Kong University of Science and Technology Clear Water Bay Hong Kong China Nano Science and Technology Program Hong Kong University of Science and Technology Clear Water Bay Hong Kong China

This paper is a continuation of our work on the development of multiscale numerical scheme from low-speed isothermal flow to compressible flows at high Mach numbers. In our earlier work [Z. L. Guo et al., Phys. Rev. E 88, 033305 (2013)], a discrete unified gas kinetic scheme (DUGKS) was developed for low-speed flows in which the Mach number is small so that the flow is nearly incompressible. In the current work, we extend the scheme to compressible flows with the inclusion of thermal effect and shock discontinuity based on the gas kinetic Shakhov model. This method is an explicit finite-volume scheme with the coupling of particle transport and collision in the flux evaluation at a cell interface. As a result, the time step of the method is not limited by the particle collision time. With the variation of the ratio between the time step and particle collision time, the scheme is an asymptotic preserving (AP) method, where both the Chapman-Enskog expansion for the Navier-Stokes solution in the continuum regime and the free transport mechanism in the rarefied limit can be precisely recovered with a second-order accuracy in both space and time. The DUGKS is an idealized multiscale method for all Knudsen number flow simulations. A number of numerical tests, including the shock structure problem, the Sod tube problem in a whole range of degree of rarefaction, and the two-dimensional Riemann problem in both continuum and rarefied regimes, are performed to validate the scheme. Comparisons with the results of direct simulation Monte Carlo (DSMC) and other benchmark data demonstrate that the DUGKS is a reliable and efficient method for multiscale flow problems.

关键词： GAS dynamics KNUDSEN flow GASES -- Compressibility MULTISCALE modeling MACH number MONTE Carlo method

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Fiber Orientation Effecting the Mechanical Properties at Coconut Fiber Reinforce Epoxy Resin Composite

Fiber Orientation Effecting the Mechanical Properties at Coc...

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International Conference on science and technology

作者： Pongsathorn Kongkaew Wijit Choawanklang Renewable Energy and Nano-materials Research Program of Physics Faculty of Science and Technology Rajabhat Maha Sarakham University

ISBN: (纸本)9781467376716

This paper presents with the effect orientation on the mechanical properties of coconut fiber reinforced epoxy resin composite. The composite materials were prepared by using the hand lay-up technique with three totally different oriented patterns as follows: random, continuous unidirectional and weaving patterns. Evaluate and compare the mechanical properties such as tensile strength and impact strength. Fracture surface and the adhesion between fiber and matrix were studied by scanning electron microscope (SEM). Results from the study showed that the mechanical properties of weaving patterns are significantly higher than in continuous unidirectional and randomly oriented fiber composite. The best mechanical properties of the composite were succeed by fiber orientation that is weaving patterns, which showed increase in tensile strength by 123.75%, elasticity of modulus by 501.11% and Impact strength by 10.46% compared to the pure epoxy resin. Surface morphology observation using SEM showed fiber pull out and matrix-fiber adhesion.

关键词： Coconut fiber Fiber orientation Mechanical properties Scanning electron microscope Fiber orientation coir Mechanical properties Scanning Electron Microscope epoxy matrix composites Orientation effects fabric texture draft fiber pullout Impact strengths Tensile Strength Weaving

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