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change of resistance of graphene (grown by CVD on nickel and then ..
To the end of synthesizing useful graphene-based composites, chemical vapor deposition (CVD) growth of graphene on thin palladium leaves is studied for the potential of nano-gilding based coating of surfaces for added functionality.
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Glancing angle deposited nanorods have attracted a great attention in many applications such as heat transfer, renewable energy, communication, electronic and electrical field, material science and engineering due to their unique properties. These nanorods are grown randomly with different morphologies and uncontrolled lengths and separation among the nanorods on flat substrates due to the shadowing effect occurs during the glancing angle deposition (GLAD) technique. Further enhancement of the performance of the GLAD nanorods is expected by controlling the morphology and separation among the nanorods by surface patterning. Hence, the goal of this work is to investigate the effect of surface pattering on the morphology and separation among the GLAD nanorods. To reach our goal, a combination of modified-nanosphere lithography (m-NSL) technique and GLAD technique is proposed to fabricate periodic and well-separated nanorods. For demonstration, Molybdenum (Mo), Chromium (Cr), and Copper (Cu) were used as source (target) materials due to their low cost and their availability in the laboratory. The results shows that the periodic Mo, Cr, and Cu nanorods has better separation among the nanorods than those grown on flat substrates, while they are larger in diameter and shorter in length. The periodic GLAD nanorods are also exhibited amazing structure that is flower-like or honeycomb-like structure since they are replicating the underlying patterned substrates.
the Chemical Vapour Deposition of Graphene ..
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Lett., 109, 133101 (2016)
Simple fabrication of air-stable black phosphorus heterostructures with large-area hBN sheets grown by chemical vapor deposition method
Sapna Sinha, Yuya Takabayashi, Hisanori Shinohara and Ryo Kitaura
, 3, 035010 (2016)
Another big discovery-metallofullerenes
A, 374, 2076 (2016)
Origin of residual particles on transferred graphene grown by CVD
Tomohiro Yasunishi, Yuya Takabayashi, Shigeru Kishimoto, Ryo Kitaura, Hisanori Shinohara, and Yutaka Ohno
Thesis: Subject(s): Graphene, Palladium, CVD:
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Heterogeneous photo-catalysis is an advanced oxidation process (PAO), which has been the subject of numerous studies and applications, particularly using the commercial oxide of TiO2 (P25, Evonik). Zinc oxide (ZnO) has often been considered a valid alternative to TiO2 due to its good opto-electronic, catalytic and photochemical characteristics along with its low cost. In order to improve the photocatalytic performance of ZnO for practical applications, various types of synthetic approaches have been developed, including, among others, the hydrothermal / solvothermal growth method, sol-gel method, ultrasonic assisted method, deposition chemistry in vapor phase, etc. with the aim of preparing ZnO particles with different sizes and morphologies. However, all of these methods require relatively severe reaction conditions such as high temperature, sophisticated techniques, high purity of gases, adjustable gas flow, expensive raw materials, etc. Therefore, it is important to find a simple and cost-effective method for the synthesis of crystalline nano-particles of ZnO. For this reason, in the present work, the ZnO has been synthesized by three different procedures: conventional aqueous precipitation method, hydrothermal method (H) and microwave assisted method (MW). In all three processes, the same material is obtained, hydrocincite [Zn5(CO3) 2(OH)6], which evolves to crystalline ZnO after calcination thermal treatments. We investigated the effect of the calcination temperature, at the same time (2 h), on the optical, textural and structural properties. Photo-catalytic studies were performed using two selected substrates, Methyl Orange and Phenol, as toxic model substrates (one colorant and the other transparent). The catalysts prepared were characterized by several techniques: DRX, SBET, FE-SEM, TEM and UV-Vis (in diffuse reflectance mode).From the results of XRD, it has been possible to establish that a minimum difference between the relative intensities of exposed faces (I100 and I002) is a crucial factor to obtain good photocatalytic properties. This minimum difference is achieved, in our cases by thermal treatments of calcination at 400ºC, 2 h. When this temperature is chosen, there is no appreciable variation between the photocatalytic activities of the oxides of zinc obtained by the three processes, and there are small differences depending on the nature of the substrate chosen, which can be attributed to the textural differences between the oxides. In any case, the obtained zinc oxides show, for each substrate, photo-catalytic activities in the UV that are superior to those presented by the widely used commercial oxide TiO2 (P25) used as reference.
Dr Chen-Kuei Chung received his B.E. and Ph.D. degrees of Materials from National TsingHua University, Taiwan, in 1989 and 1994 respectively. From 1994 to 2002, he worked inIndustrial Technology Research Institute for further technology research and developmentincluding the process development and integration of MEMS technologies and keycomponents such as inkjet printhead, IR sensor array and biochip. He joined the Departmentof Mechanical Engineering, National Cheng Kung University (ME/NCKU) in August, 2002,was promoted to Associate Professor in 2005, and then to full Professor in 2009. He haspublished more than 125 Int’l Journal Papers, 5 book chapters and more than 100 Int’lConference Papers and holds more than 35 patents granted. Dr. Chung’s research interests aremicro-nano material science and engineering, and fabrication, characterization and processintegration of MEMS/NEMS devices for sensor, actuator and LIGA application, especially inthe advanced hybrid pulse anodization, characterization and application.
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Silver Nanowire (500mg) Supplier - ACS Material
His first report on the CVD synthesis of graphene (, 706 (2009)) has recorded the world highest citations in chemistry among the papers published since 2009.
Shinohara Laboratory - Nagoya University
Before joining U. T. Dallas in the Fall of 2003, Dr. Yang was in charge of leading Nano-Bio Business Development at the Samsung Advanced Institute of Technology (SAIT) as an Executive Vice President. SAIT is the Central R&D organization in Samsung Electronics. For 1997-99, he was the Head of Chemical Sector and Vice President at the Institute, and in February, 2000, he was promoted to an Executive Vice President in covering bio/chemical fields as CRO besides managing the Chemical Sector. Prior to Samsung, while employed at DuPont Company, he held various positions as a researcher, group leader, project/marketing manager at DuPont-U.S.A for 1978-95 and as Managing Director at DuPont-Korea for 1995-97. While at Dupont, he received various experiences through working in the several positions in R&D, manufacturing, supply chain, project/product management and sales/marketing at Polymer Intermediates Dept., Finishes/Fabricated Products Dept., Automotive Products SBU and Electronics Materials SBU. He was an adjunct professor at the Center for Surface Science and Engineering at University of Missouri at Columbia for 1989-93. He was also a founding member of Delaware Korean School and served as Managing Principle for 1993-5.
Laboratory Events | Brookhaven National Laboratory
Miho Fujihara (a Ph.D student) has won "Young Scientist Poster Award" and "Journal of Materials Chemistry A award" on her study entitled “Polymer-free transfer of CVD graphene to boron nitride substrates” in the 49th Fullerenes, Nanotubes, and Graphene General Symposium.
Sustainable Energy Technologies Department
Mitsuhiro Okada (a Master student) has won of Department of Chemstry and of Graduate School of Scienece, Nagoya University on his study entitled "Chemical Vapor Deposition Synthesis of Group-VI Transition Metal Dichalcogenide Atomic Layers and Characterization of its Optical and Electrical Properties".
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