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Synthesis and characterization of Cu-Pt/MWCNTs for use in electrocatalytic applications

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Particuology 2011年第5期9卷 522-527页

作者： Yuh-Jing Chiou Hang-Jui Hsu Hong-Ming Lin wei-jen liou Huey-Wen liou She-Huang Wu Shu-Hua Chien Department of Materials Engineering Tatung University 40 Chungshan N. Rd. 3rd Sec 104 Taipei Taiwan China Institute of Chemistry Academia Sinica 128Academia Road Sec. 2 Nankang 115 Taipei Taiwan China

Improving catalyst performance by studying the preparation parameters, material structures and analysis methods is important work for catalyst researchers. In this study, Cu-Pt nanocomposites with different metal ratios were synthesized on MWCNTs using a polyol method. The structures and morphologies of the nano hybrid catalysts were analyzed by XRD and TEM. The XRD results indicate that Pt and Cu formed a bimetallic solid solution. The average diameters of the Pt and Cu-Pt nanoparticles on MWCNTs were between 3-10 nm and 5-15 nm, respectively. The electrocatalytic behavior of methanol oxidation reactions was investigated by cyclic voltammery （CV）. Cu（20%）/[Pt/MWCNTs（1：4）], which contained an optimal degree of solid solution, enhanced the methanol oxidation to the greatest degree.

关键词： Electrocatalysis Methanol Multi-walled carbon nanotubes NanoparticlesPlatinumCopper

Synthesis and Electrocatalysis Study of Multi-walled Carbon Nanotubes Supported Nano Platinum-based Hybrid Catalyst

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Synthesis and Electrocatalysis Study of Multi-walled Carbon ...

Synthesis and Characterization of Novel Hybrid Poly(methyl methacrylate)/Iron Nanowires for Potential Hyperthemia Therapy

第六届海峡两岸超微颗粒学术研讨会

作者： wei-jen liou Andrzej Borodziski Leszek Stobinski Piotr Kedzierzawski Department of Materials Engineering Tatung UniversityTaipei Institute of Physical Chemistry Polish Academy of SciencesWarsawPoland Faculty of Materials Science and Engineering Warsaw University of TechnologyWarsawPoland

Hydrogen energy will be an important power source in the near *** studies of hydrogen production,hydrogen purification,hydrogen application and hydrogen storage have attracted much attention and been studied widely in academic and technologic *** catalyst is an important role in hydrogen energy *** hybrid structure will be provided an effective method to enhance the activity of catalysts for energy *** development of nano hybrid catalysts in the methanol and formic acid electroxidation reaction will be studied in this *** exploration includes Pt/metal oxide semiconductor/MWCNTs and bimetallic Pd-Au/MWCNTs hybrid catalysts for anode materials of direct methanol and formic acid fuel ***-hybrid catalysts have synthesized by chemical reduction *** size distribution,hybrid structure,and interfacial properties of each component can be controlled by changing the process parameters,such as precursor concentrations,temperatures,pH values, and heat treatments *** structure of the hybrid catalyst is characterized by XRD,SEM,and *** weight percents of each component in hybrid materials are determined by *** performance for surface catalysis behavior,redox reaction,interfacial properties,and electrochemistry reaction of the hybrid catalysts will be characterized by TPR,CO oxidation conversion,and C-V *** this work,the new hybrid materials will solve the poisoning problem and enhance conductivity of catalysts in DMFC and DFAFC applications.

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Journal of Biomaterials and Nanobiotechnology 2010年第1期1卷 50-60页

作者： Huey-Wen liou Hong-Ming Lin Yeu-Kuang Hwu Wen-Chang Chen wei-jen liou Li-Chung Lai wei-Syuan Lin Wen-An Chiou Department of Chemical and Materials Engineering National Yunlin University of Science and Technology University Road Section Douliou Yunlin Taiwan Department of Materials Engineering Tatung University DeHui St. Taipei Taiwan Institute of Physics Academia Sinica Academia Rd. Nankang Taipei Taiwan NISP Lab Jeong H. Kim Engineering Building NanoCenter University of Maryland College Park U.S.A.

Externally applied magnetic fields have been used in this study to fabricate bamboo-like iron nanowires with or without a layer of Poly(methyl methacrylate) (PMMA). The hybrid PMMA/Fe nanowires were synthesized via hard X-ray synchrotron radiation polymerization with various treatment parameters. The results of XRD show that an oxide layer formed on the surface of the iron nanowires. The Fe2O3 and Fe3O4 phases coexist in the iron nanowires without X-ray irradiation. After X-ray irradiation, the Fe2O3 phase transformed into Fe3O4, which stabilized the iron nanowires. The results of XAS proved this phase transformation. TGA analysis confirmed the thermal properties and solid contents in these specimens. Their ferromagnetic behaviors were examined by magnetic hysteresis measurement, which indicated that the magnetic and structural properties of the nanowires can be manipulated by irradiation treatment. This may lead to a novel synthesis for iron nanowires that can be used in high thermal efficiency hyperthermia therapy.

关键词： Iron Nanowires Poly(methyl methacrylate) Hybrid X-Ray Irradiation XAS Magnetic Materials

Synthesis and Characterization of Iron Nanowires

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Synthesis and Characterization of Iron Nanowires

Hybrid MOS/CNTs Materials for Gas Sensing

中国颗粒学会超微颗粒专委会2011年年会暨第七届海峡两岸超微颗粒学术研讨会

作者： wei-Syuan Lin Zih-Jie Jian Li-Chung Lai Wen-An Chiou Yeu-Kuang Hwu Cheng-Han Chen wei-jen liou Department of Materials Engineering Tatung University NISP Lab Maryland NanoCenterUniv.of MarylandCollege ParkMD 20742-2831USA Institute of Physics Academia SinicaNankangTaipei 115Taiwan“R.O.C”

The iron nanowires(iron NWs) with high magnetization were fabricated via reduction of iron salts with sodium borohydride in a parallel magnetic *** iron nanowires were covered by passivated layers of iron oxide which prevent the oxidation of iron *** morphological,microchemical and structural investigation of the newly synthesized iron nanowires were characterized by using XRD,FE-SEM, HRTEM,EDS,VSM and *** TEM and SEM images showed the diameter and length of the synthesized iron nanowires are around 50-100 nm and 5-10μm, *** spacing obtained from HRTEM images is about 0.202 nm,which is corresponding to the lattice spacing of Fe in(110) ***,we have studied disordered and arrayed iron nanowires’(NWs) magnetic *** field was applied in parallel direction(||) and perpendicular direction(⊥) to the iron NWs array.

关键词： iron nanowires high magnetization squareness ratio

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Hybrid MOS/CNTs Materials for Gas Sensing

InGaN multiple quantum well based light-emitting diodes with indium composition gradient InGaN quantum barriers

中国颗粒学会超微颗粒专业委员会第四届学术年会暨海峡两岸纳米颗粒学术研讨会

作者： wei-jen liou, Kuan-Nan Lin, Hong-Ming Lin Department of Materials Engineering, Tatung University, Taipei 104, Taiwan

The hybrid nanomaterials have been considered as new generation of functional materials and are emphasized by many researches in past years. The new functional properties can be obtained in these hybr

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Optoelectronics Letters 2024年第2期20卷 89-93页

作者： SANG Xien XU Yuan YIN Mengshuang WANG Fang liou Juin J LIU Yuhuai National Center for International Joint Research of Electronic Materials and Systems International Joint-Laboratory of Electronic Materials and Systems of Henan ProvinceSchool of Electrical and Information EngineeringZhengzhou UniversityZhengzhou 450001China Institute of Intelligence Sensing Zhengzhou UniversityZhengzhou 450001China Research Institute of Industrial Technology Co. Ltd.Zhengzhou UniversityZhengzhou 450001China Zhengzhou Way Do Electronics Co. Ltd.Zhengzhou 450001China School of Electrical and Information Engineering North Minzu UniversityYinchuan 750001China1

To improve the internal quantum efficiency(IQE)and light output power of In Ga N light-emitting diodes(LEDs),we proposed an In-composition gradient increase and decrease In Ga N quantum barrier *** analysis of its P-I graph,carrier concentration,and energy band diagram,the results showed that when the current was 100 m A,the In-composition gradient decrease quantum barrier(QB)structure could effectively suppress electron leakage while improving hole injection efficiency,resulting in an increase in carrier concentration in the active region and an improvement in the effective recombination rate in the quantum well(QW).As a result,the IQE and output power of the LED were effectively improved.

关键词： diodes quantum gradient

Accelerated intermetallic phase amorphization in a Mg-based high-entropy alloy powder

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Journal of Magnesium and Alloys 2024年第5期12卷 1792-1798页

作者： Prince Sharma Purvam Mehulkumar Gandhi Kerri-Lee Chintersingh Mirko Schoenitz Edward L.Dreizin Sz-Chian liou Ganesh Balasubramanian Institute for Functional Materials&Devices Lehigh UniversityBethlehemPA 18015USA Center of Materials for Advanced Energetics New Jersey Institute of TechnologyNewarkNJ 07102USA

We describe a novel mechanism for the synthesis of a stable high-entropy alloy powder from an otherwise immiscible Mg-Ti rich metallic mixture by employing high-energy mechanical *** presented methodology expedites the synthesis of amorphous alloy powder by strategically injecting entropic disorder through the inclusion of multi-principal elements in the alloy *** from first principles and materials theory corroborate the results from microscopic characterizations that reveal a transition of the amorphous phase from a precursor intermetallic *** transformation,characterized by the emergence of antisite disorder,lattice expansion,and the presence of nanograin boundaries,signifies a departure from the precursor intermetallic ***,this phase transformation is accelerated by the presence of multiple principal elements that induce severe lattice distortion and a higher configurational *** atomic size mismatch of the dissimilar elements present in the alloy produces a stable amorphous phase that resists reverting to an ordered lattice even on annealing.

关键词： High-entropy alloy High-energy milling Antisite disorder Amorphous Intermetallic

Insights and implications of sexual dimorphism in osteoporosis

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Bone Research 2024年第1期12卷 20-49页

作者： Yuan-Yuan Zhang Na Xie Xiao-Dong Sun Edouard C.Nice Yih-Cherng liou Canhua Huang Huili Zhu Zhisen Shen Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry and Sichuan Province Sichuan Research Center for Drug Precision Industrial TechnologyWest China School of PharmacySichuan UniversityChengdu 610041China West China School of Basic Medical Sciences&Forensic Medicine Sichuan UniversityChengdu 610041China Department of Biochemistry and Molecular Biology Monash UniversityClaytonVIC 3800Australia Department of Biological Sciences Faculty of ScienceNational University of SingaporeSingapore 117543Republic of Singapore Department of Biotherapy Cancer Center and State Key Laboratory of BiotherapyWest China Hospitaland West China School of Basic Medical Sciences&Forensic MedicineSichuan UniversityChengdu 610041China Key Laboratory of Birth Defects and Related Diseases of Women and Children of Ministry of Education Department of Reproductive MedicineWest China Second University Hospital of Sichuan UniversityChengduChina Department of Otorhinolaryngology and Head and Neck Surgery The Affiliated Lihuili HospitalNingbo University315040 NingboZhejiangChina

Osteoporosis,a metabolic bone disease characterized by low bone mineral density and deterioration of bone microarchitecture,has led to a high risk of fatal osteoporotic fractures *** evidence has revealed that sexual dimorphism is a notable feature of osteoporosis,with sex-specific differences in epidemiology and ***,females are more susceptible than males to osteoporosis,while males are more prone to disability or death from the *** date,sex chromosome abnormalities and steroid hormones have been proven to contribute greatly to sexual dimorphism in osteoporosis by regulating the functions of bone *** the sex-specific differences in osteoporosis and its related complications is essential for improving treatment strategies tailored to women and *** literature review focuses on the mechanisms underlying sexual dimorphism in osteoporosis,mainly in a population of aging patients,chronic glucocorticoid administration,and ***,we highlight the implications of sexual dimorphism for developing therapeutics and preventive strategies and screening approaches tailored to women and ***,the challenges in translating bench research to bedside treatments and future directions to overcome these obstacles will be discussed.

关键词： osteoporosis epidemiology overcome

Increase of insulin sensitivity in diabetic rats received Die-Huang-Wan, a herbal mixture used in Chinese traditional medicine

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Acta Pharmacologica Sinica 2002年第12期23卷 128-134页

作者： HSU jen-Hao,liou Shorong-Shii,CHENG Juei-Tang Graduate Institute of Natural Products Kaohsiung Medical University Kaohsiung City Graduate Institute of Natural Products Kaohsiung Medical University Kaohsiung City Department of Pharmacology College of Medicine National Cheng Kung University Tainan City Taiwan China Department of Pharmacology College of Medicine National Cheng Kung University Tainan City Taiwan 70101 China

AIM: Effects on insulin sensitivity of Die-Huang-Wan, the herbal mixture widely used to treat diabetic disorder in Chinese traditional medicine, were investigated in vivo. METHODS: The obese Zucker rats were employed as insulin-resistant animal model. Also, insulin-resistance was induced by the repeated intraperitoneal injections of long-acting human insulin at 0.5 U/kg three times daily into adult male Wistar rats. Insulin resistance was identified using the loss of tolbutamide (10 mg/kg) or electroacupuncture (EA)-induced plasma glucose lowering action. The plasma glucose concentration was examined by glucose oxidase assay. RESULTS: The plasma glucose-lowering action induced by tolbutamide was significantly enhanced in obese Zucker rats receiving the repeated administration of Die-Huang-Wan at dosage of 26 mg/kg for 3 d. Furthermore, administration of Die-Huang-Wan delayed the formation of insulin resistance in rats that were induced by the daily repeated injection of human long-acting insulin at 0.5

关键词： insulin sensitivity Die-Huang-Wan obese Zucker rats insulin resistance