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Online since: October 2005
Authors: Ho Chang, Tsing Tshih Tsung, Y.Y. Cho, D.C. Tien, C.H. Thai, Chih Hung Lo, Liang Chia Chen
Introduction
Nanomaterial is a transition stage structure between atomic cluster and macrocosmic physical object.
In other words, the surface physical and chemical attributes become much more important under such material structure.
Kuo: Introduction of Gel Substance and Interface Chemistry (Kaoli Publishing, 2000)
In other words, the surface physical and chemical attributes become much more important under such material structure.
Kuo: Introduction of Gel Substance and Interface Chemistry (Kaoli Publishing, 2000)
Online since: May 2006
Authors: Georg Jakopic, Andreas Rudorfer, Roswitha Berghauser, Stefan Köstler, Volker Ribitsch
Stable Dispersions of Aromatic Hydrocarbon Colloidal Particles by
Laser Ablation
Stefan Köstler1,2, Andreas Rudorfer3 , Roswitha Berghauser4, Georg Jakopic
3
,
Volker Ribitsch1,2
1 Joanneum Research, Institute of Chemical Process Development and Control,
Steyrergasse 17, 8010 Graz, Austria.
2 University of Graz, Institute of Chemistry, Heinrichstraße 28, 8010 Graz, Austria.
3 Joanneum Research, Institute of Nanostructured Materials and Photonics, FranzPichler
Str. 30, 8160 Weiz, Austria.
4 Joanneum Research, Leoben Laser Center, Leobnerstr. 94, 8712 Niklasdorf,
Austria.
Experimental Tetracene crystals (Aldrich) were used as received, pentacene (Aldrich) was purified by sublimation in vacuo (see Fig. 1 for the structures).
Fig. 1: Structures of tetracene and pentacene.
Experimental Tetracene crystals (Aldrich) were used as received, pentacene (Aldrich) was purified by sublimation in vacuo (see Fig. 1 for the structures).
Fig. 1: Structures of tetracene and pentacene.
Online since: February 2018
Authors: Zeng Lin Zhou, Qiao Juan Deng, Yan Li, Zhi Lin Hui, Fu Wang, Xue Liang He
In this production route, tungsten skeleton with proper relative density suitable for infiltration was compacted and sintered, and then the molten copper was infiltrated into the open pores of the tungsten porous structure [7-9].
And the granule morphology, the microscopic structure and fracture surface of copper infiltrated tungsten material were examined by Scanning Electron Microscopy (SEM, JSM-7001F, JEOL, Japan).
Schubert, Tungsten: Properties, Chemistry, Technology of the Element, Alloys, and Chemical Compounds, Springer US: Kluwer Academic/Plenum Publishers, New York, 1999
And the granule morphology, the microscopic structure and fracture surface of copper infiltrated tungsten material were examined by Scanning Electron Microscopy (SEM, JSM-7001F, JEOL, Japan).
Schubert, Tungsten: Properties, Chemistry, Technology of the Element, Alloys, and Chemical Compounds, Springer US: Kluwer Academic/Plenum Publishers, New York, 1999
Online since: November 2017
Authors: Rahul Chhibber, Rakesh Joshi
The original copper contains Face centered cubic structure(FCC) copper matrix.
Whereas no change in crystalline structure of the phases was observed in case of austenitic stainless steel (304) as shown in Table 1.
Review: Preparation, properties and chemistry of glass and glass-ceramic-to-metal seals and coatings.
Whereas no change in crystalline structure of the phases was observed in case of austenitic stainless steel (304) as shown in Table 1.
Review: Preparation, properties and chemistry of glass and glass-ceramic-to-metal seals and coatings.
Online since: October 2018
Authors: Jie Guang Song, Chang Ming Wu, Yan Yang, Da Deng, Cheng Wei Hao, Hui Min Sun, Lin Chen, Mei Hua Chen, Min Han Xu
Effect of Molding Processing on Properties of YAG Porous Ceramics
via Dry Pressing Molding Method
Changming Wu1, Yan Yang1, Huimin Sun1, Da Deng1, Meihua Chen1,
Jieguang Song1a, Lin Chen1, Minghan Xu2, Chengwei Hao3
1Engineering & Technology Research Center for Environmental Protection Materials and Equipment of Jiangxi Province, School of Materials and Chemistry Engineering, Pingxiang University, Pingxiang 337055 China
2School of Mechanical and Materials Engineering, Jiujiang University, Jiujiang 332005, China
3School of Architecture and Civil Engineering, West Anhui University, Luan 237012, China
asongjieguang@163.com
Keywords: YAG; porous ceramics; molding processing; dry pressing molding method
Abstract.
Introduction Yttrium aluminum garnet (YAG) is an oxide formed by the reaction of Al2O3 with Y2O3, YAG belong to the cubic system, it name for its garnet structure.
Therefore, it is necessary to control the pore structure of porous YAG materials [10-12].
Introduction Yttrium aluminum garnet (YAG) is an oxide formed by the reaction of Al2O3 with Y2O3, YAG belong to the cubic system, it name for its garnet structure.
Therefore, it is necessary to control the pore structure of porous YAG materials [10-12].
Online since: January 2013
Authors: Chang Ren Zhou, Li Hua Li, Jia Hao Su, Guo Dong Sun, Jie Chen, Chen Zhou, Bi Hua Ye
Results and Discussion
The Structure and Morphology of the Asymmetric Membranes
Fig.1 The morphology of the porous surface (a,c ) and smooth surface (b,d)
The translucent CS/HA composite membranes had a good adhesion to skin.
Fig.4 Histological observation of tissues in rats with: normal tissues (a), asymmetric membranes (b) and no materials (c) Conclusions In this study, polysaccharide composite membranes with asymmetric structures have been successfully prepared with Chitosan and hyaluronate by the two-step phase separation process.
Materials Chemistry and Physics. 2004;83:204-8
Fig.4 Histological observation of tissues in rats with: normal tissues (a), asymmetric membranes (b) and no materials (c) Conclusions In this study, polysaccharide composite membranes with asymmetric structures have been successfully prepared with Chitosan and hyaluronate by the two-step phase separation process.
Materials Chemistry and Physics. 2004;83:204-8
Online since: September 2013
Authors: Jun Hui Wu, Chen Jie, Xiao Zhen
Long gaseous residence time leads to the secondary decomposition of anhydrosugar and yields secondary tar and light gas composition which are fragment structures.
Firstly, the components and structure of biomass are totally complex and diverse, which makes it hard to be studied.
Vol.44(2010), p.39 [21] Chuncai Song, Haoquan Hu, Shengwei Zhu: Journal of Fuel Chemistry and Technology.Vol.31(2003), p.311 [22] Jun Wang, Mingqiang Chen, Mingxu Zhang: Journal of Harbin Institute of Technology.
Firstly, the components and structure of biomass are totally complex and diverse, which makes it hard to be studied.
Vol.44(2010), p.39 [21] Chuncai Song, Haoquan Hu, Shengwei Zhu: Journal of Fuel Chemistry and Technology.Vol.31(2003), p.311 [22] Jun Wang, Mingqiang Chen, Mingxu Zhang: Journal of Harbin Institute of Technology.
Online since: February 2014
Authors: Jian Wu, Zhen Yu Li, Tian Gao, Tian Tian, Fang Yao Liu
Introduction
Today, the science and technology is highly developed, and a large number of technical problems are existed in weak signal detection in scientific research, production, national defense, biomedicine, chemistry, physics, and many other fields.
Also, it has the following advantages: simple structure, low cost, good teaching effect, etc.
The structure diagram of the system is shown in Fig.2.
Also, it has the following advantages: simple structure, low cost, good teaching effect, etc.
The structure diagram of the system is shown in Fig.2.
Online since: March 2015
Authors: De Fan Qing, Mao Kui Zhu, Ai Rui Chen
The higher heating value biomass gasifier used double chamber as its structure.
EDC transport models was used for turbulence - chemistry interaction, the heating inlet mass flow rate provided anignition source for start burning.
The structure of coal char: Part I.
EDC transport models was used for turbulence - chemistry interaction, the heating inlet mass flow rate provided anignition source for start burning.
The structure of coal char: Part I.
Online since: November 2025
Authors: Levan Chkhartishvili, Manana Beridze, Darejan Khocholava, Marina Shogiradze, Nona Esiava, Lali Turiashvili, Teimuraz Pagava
Extended Study of High-Energy Irradiation Effect on Majority Current Carriers Mobility in n- and p-Type Silicon Crystals
PAGAVA Teimuraz1,a,*, CHKHARTISHVILI Levan1,b, BERIDZE Manana1,c, KHOCHOLAVA Darejan1,d, SHOGIRADZE Marina1,e, ESIAVA Nona1,f, TURIASHVILI Lali2,g
1Georgian Technical University, Faculty of Informatics and Control Systems, Department of Engineering Physics, 77 Merab Kostava Avenue, Tbilisi, 0160, Georgia
2Ivane Javakhishvili Tbilisi State University, Faculty of Exact and Natural Sciences,
Department of Chemistry, 3 Ilia Chavchavadze Avenue, Tbilisi, 0128, Georgia
atpagava@gtu.ge, blevanchkhartishvili@gtu.ge, cberidzemanana08@gtu.ge, dkhocholavadarejan08@gtu.ge, eshogiradzemarina@gmail.com, fesiavanona08@gtu.ge, glali.turiashvili@tsu.ge
* Corresponding author: tpagava@gtu.ge
Keywords: silicon, radiation defect, disordered region, Hall mobility.
From the huge number of reports on irradiation-induced morphology of silicon and its structures and related physical-electrical properties, available in the literature, one can conclude that at certain conditions (irradiation dose/temperature and subsequent annealing), irradiation with sufficiently high-energy particles, in addition to primary and secondary point RDs (Radiation Defects), forms nano-sized DRs (Disordered Regions), which are highly conductive or “metallic” compared to the semiconducting matrix.
At certain temperatures, such nanosized core–shell structures Coulomb-blockade the majority current carriers, i.e. transform the DRs into low-conductive or “dielectric” inclusions.
From the huge number of reports on irradiation-induced morphology of silicon and its structures and related physical-electrical properties, available in the literature, one can conclude that at certain conditions (irradiation dose/temperature and subsequent annealing), irradiation with sufficiently high-energy particles, in addition to primary and secondary point RDs (Radiation Defects), forms nano-sized DRs (Disordered Regions), which are highly conductive or “metallic” compared to the semiconducting matrix.
At certain temperatures, such nanosized core–shell structures Coulomb-blockade the majority current carriers, i.e. transform the DRs into low-conductive or “dielectric” inclusions.