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2.560 Aktuelle Fachpublikationen zum Thema temperature

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Microwave-Assisted Hydrothermal Synthesis of Cu/Cu2O Hollow Spheres with Enhanced Photocatalytic and Gas Sensing Activities at Room Temperature

25.03.2015 | Xinwei Zou; Huiqing Fan; Yuming Tian; Mingang Zhang; Xiaoyan Yan, Dalton Transactions, 2015

Cu/Cu2O nano-heterostructure hollow spheres with a submicron diameter (200~500 nm) were prepared by a microwave-assisted hydrothermal method using Cu(OAc)2•H2O, PVP and ascorbic acid solution as the precursor. The morphology of the products could evolve as the hydrothermal time from solid spheres ...


Semi‐polar (112¯2)‐GaN templates grown on 100 mm trench‐patterned r‐plane sapphire

20.03.2015 | Frank Brunner, Francis Edokam, Ute Zeimer, Wilfred John, Deepak Prasai, Olaf Krüger, Markus Weyers, physica status solidi (b), 2015

This report describes the successful realization of high‐quality semi‐polar ‐GaN templates grown on 100 mm diameter r‐plane patterned sapphire. Trench patterning is accomplished by plasma etching using a slanted SiNx mask that is formed by a resist‐reflow process and subsequent dry etching. ...


Template-Free Electrochemical Synthesis of High Aspect Ratio Sn Nanowires in Ionic Liquids: A General Route to Large-Area Metal and Semimetal Nanowire Arrays?

20.03.2015 | Rihab Al-Salman; Heino Sommer; Torsten Brezesinski; Jürgen Janek, Chemistry of Materials, 2015

A facile low-temperature and template-free synthesis route to high aspect ratio Sn nanowires is described. The nanowires are prepared by electrochemical deposition from SnCl4/ionic liquid solutions containing SiCl4 onto a variety of substrates, including glassy carbon as well as Cu, Al, and Sn ...


Long term annealing of C‐type kudzu starch: Effect on crystalline type and other physicochemical properties

18.03.2015 | Bao Zhang, Chunsen Wu, Hongyan Li, Xiuting Hu, Zhengyu Jin, Yaoqi Tian, Xueming Xu, Starch - Stärke, 2015

Kudzu starch samples were prepared by annealing (ANN) treatment in 1:1.5 starch to water ratio at 50°C for 1, 3, and 9 days. The effects of ANN on the morphology, structure, swelling power, solubility, and pasting properties of the resultant samples were evaluated. Scanning electron microscopy ...


Self‐Template‐Directed Synthesis of Porous Perovskite Nanowires at Room Temperature for High‐Performance Visible‐Light Photodetectors

17.03.2015 | Sifei Zhuo, Jingfang Zhang, Yanmei Shi, Yi Huang, Bin Zhang, Angewandte Chemie International Edition, 2015

Abstract The unique optoelectronic properties and promising photovoltaic applications of organolead halide perovskites have driven the exploration of facile strategies to synthesize organometal halide perovskites and corresponding hybrid materials and devices. Currently, the preparation of ...


Materials, Vol. 8, Pages 1027-1042: Precursor-Less Coating of Nanoparticles in the Gas Phase

11.03.2015 | Pfeiffer, Tobias V.; Kedia, Puneet ; Messing, Maria E.; Valvo, Mario ; Schmidt-Ott, Andreas, Materials, 2015

This article introduces a continuous, gas-phase method for depositing thin metallic coatings onto (nano)particles using a type of physical vapor deposition (PVD) at ambient pressure and temperature. An aerosol of core particles is mixed with a metal vapor cloud formed by spark ablation by passing ...


Effects of Silver Addition on Critical Current Densities and Mechanical Properties in Bulk MgB2

09.03.2015 | Miryala Muralidhar, Kazuo Inoue, Michael R. Koblischka, Akira Murakami, Masato Murakami, Advanced Engineering Materials, 2015

The present study focuses on the effects of Ag addition on the critical current density (Jc) and the mechanical performance of disk‐shaped MgB2 bulk superconductors. MgB2 samples with varying Ag contents of 0, 2, 4, 6, 8, and 10 wt% were sintered at 775 °C for 3 h in Ar atmosphere. The Jc ...


One-step synthesis and highly gas-sensing properties of hierarchical Cu-doped SnO2 nanoflowers

08.03.2015 | Author(s): W.X. Jin , S.Y. Ma , Z.Z. Tie , J.J. Wei , J. Luo , X.H. Jiang , T.T. Wang , W.Q. Li , L. Cheng ..., Sensors and Actuators B: Chemical, 2015

Publication date: 5 July 2015 Source:Sensors and Actuators B: Chemical, Volume 213 Author(s): W.X. Jin , S.Y. Ma , Z.Z. Tie , J.J. Wei , J. Luo , X.H. Jiang , T.T. Wang , W.Q. Li , L. Cheng , Y.Z. Mao The hierarchical pure and Cu-doped SnO2 nanoflowers were synthesized by a ...


Asymmetric polysulfone gas separation membranes treated by low pressure DC glow discharge plasmas

07.03.2015 | Chalad Yuenyao, Yutthana Tirawanichakul, Thawat Chittrakarn, Journal of Applied Polymer Science, 2015

ABSTRACT Asymmetric polysulfone (PSF) gas separation membranes were prepared at different conditions such as non‐solvent concentration, evaporation time (ET) and coagulation bath temperature (CBT). In addition, effects of low‐pressure DC glow discharge plasma on the characteristics of PSF ...


Facile Synthesis of ZnO–Reduced Graphene Oxide Nanocomposites for NO2 Gas Sensing Applications

06.03.2015 | Nagesh Kumar, Arvind Kumar Srivastava, Hari Shankar Patel, Bipin Kumar Gupta, Ghanshyam Das Varma, European Journal of Inorganic Chemistry, 2015

Abstract Graphene and its exotic forms have been widely recognized as exceptional materials for gas‐sensing applications because of their extraordinary electrical conductivity and large surface area to volume ratios. Herein, chemically reduced graphene oxide (rGO) and zinc oxide–reduced ...


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