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Online since: April 2007
Authors: Liang Sheng Qiang, Mu Han, Dong Yan Tang
Structure and Electrical Properties of Rapid Thermally Annealed
PZT Films Deposited Through Sol-gel Process
Liangsheng Qiang, Dongyan Tang and Mu Han
Department of Applied Chemistry, Harbin Institute of Technology, Harbin 150001, China
Keywords: lead zirconate titanate; thin film; ferroelectric property; sol-gel
Abstract.
Online since: August 2011
Authors: Wu Wei, Xin Tai Su, Feng Xiao, Ya Ni Li
Ethanol sensing properties of tungsten oxide nanocubes prepared by a urea-assisted hydrothermal method
Wei Wua, Xintai Sub, Feng Xiaoc and Yani Lid
Ministry Key Laboratory of Oil and Gas Fine Chemicals, College of Chemistry and Chemical Engineering, Xinjiang University, Urumqi 830046, China
awuwei0523@sina.cn, bsuxintai08@sina.com, cxiaofengxju@163.com, dlyncad@163.com
Keywords: WO3 nanocube; urea; hydrothermal; gas sensor
Abstract.
The crystal structure and morphology of WO3 nanocubes have been characterized by X-ray diffraction (XRD), scanning electron microcopy (SEM) and transmission electron microcopy (TEM).
Many attempts have been devoted to preparing WO3 particles with well-controlled dimensionality, size and crystal structure.
The crystal structure and morphology of WO3 nanocubes have been characterized by X-ray diffraction (XRD), scanning electron microcopy (SEM) and transmission electron microcopy (TEM).
Many attempts have been devoted to preparing WO3 particles with well-controlled dimensionality, size and crystal structure.
Online since: January 2012
Authors: Jun Ying Hou
After experiments, the metallographic structure, the micro-hardness, bonding strength, thickness and anti-corrosion of composite coatings were characterized by using a XJZ-6A type metalloscope and a HVS1000 type micro-hardometer, respectively.
Electroless composite plating technology is a process of obtaining sorts of different physic and chemistry properties coatings.
References [1] MnllerB,FerkelH.Al2O3-nanopartical plated Distrbution in nickel composite coatings[J], Nano-structured Materials,1998,10(8):1285~1288 [2] J.Q.Gao,L.Liu,B.Shen,et al. influence of nano Al2O3 particles to the crystallization behavior of electroless Ni-P alloy[J].
Electroless composite plating technology is a process of obtaining sorts of different physic and chemistry properties coatings.
References [1] MnllerB,FerkelH.Al2O3-nanopartical plated Distrbution in nickel composite coatings[J], Nano-structured Materials,1998,10(8):1285~1288 [2] J.Q.Gao,L.Liu,B.Shen,et al. influence of nano Al2O3 particles to the crystallization behavior of electroless Ni-P alloy[J].
Online since: June 2015
Authors: Jian Wei Xu, Sau Leng Sin, Ze Ren Lau, Hong Yan
Adamantane-Modified Polyurethanes: Effect of Hydroxy Group of Adamantane on the Properties of Polyurethanes
Ze Ren LAU1,2,a, Sau Leng SIN1, b, Hong YAN1,c and Jianwei XU1,2,d*
1Institute of Materials Research and Engineering (IMRE), Agency for Science, Technology and Research (A*STAR), 3 Research Link, 11760, Republic of Singapore
2Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Republic of Singapore
aa0071826@nus.edu.sg, bsinsl@imre.a-star.edu.sg, cyanh@imre.a-star.edu.sg, djw-xu@imre.a-star.edu.sg
Keywords: Polyurethane, Adamantanediol, Adamantanetriol, Crosslinking
Abstract: The paper describes synthesis and characterization of adamantane-modified polyurethanes (PU).
These remarkable differences between two types of admantane-modified PUs originate from the low reactivity of adamantanediol as well as the formation of cross-linked structures in the presence of adamantanetriol.
Introduction Adamantane has a special structure in which four cyclohexane rings are condensed to form a cage skeleton which is highly symmetric and thermally stable.
These remarkable differences between two types of admantane-modified PUs originate from the low reactivity of adamantanediol as well as the formation of cross-linked structures in the presence of adamantanetriol.
Introduction Adamantane has a special structure in which four cyclohexane rings are condensed to form a cage skeleton which is highly symmetric and thermally stable.
Online since: July 2011
Authors: Lin Bo Li, Juan Qin Xue, Yong Hui Song, Qiu Li Zhang, Yu Hong Tian, Xin Zhe Lan
The results show that the specific surface area is 620.94m2/g, the total pore volume is 0.4442cm3/g and the average mesopore size is 4.5808nm, the adsorbent possesses predominant mesoporous structures.
Fig. 1 Adsorption-desorption isotherms Fig. 2 BJH pore size distribution As shown in Fig.1, the isotherm seems close to type II isotherm according to the International Union of Pure and Applied Chemistry (IUPAC) classification.
The reason for this may be the pore structure is destroyed when the particle size is too small.
Fig. 1 Adsorption-desorption isotherms Fig. 2 BJH pore size distribution As shown in Fig.1, the isotherm seems close to type II isotherm according to the International Union of Pure and Applied Chemistry (IUPAC) classification.
The reason for this may be the pore structure is destroyed when the particle size is too small.
Online since: August 2013
Authors: Shi You Hao, Xiao Feng Cai, Jie Hou, Kang Wei Ji, Wan Hao Wu
R of China 321004
2, 3, 4 College of chemistry and life sciences, Zhejing Normal University, Jinhua P.
Amino-functionalized mesoporous silica (AFMS) with high amino loading, high surface area, and large pore size was synthesized using the anionic surfactant N-lauroylsarcosine sodium (Sar-Na) as template and 3-aminopropyltriethoxysilane (APTES) as co-structure directing agent (CSDA).
From fig. 2, it can be seen that a well ordered meso-structure was obtained after extraction, in agreement with the result of N2 adsorption-desorption.
Amino-functionalized mesoporous silica (AFMS) with high amino loading, high surface area, and large pore size was synthesized using the anionic surfactant N-lauroylsarcosine sodium (Sar-Na) as template and 3-aminopropyltriethoxysilane (APTES) as co-structure directing agent (CSDA).
From fig. 2, it can be seen that a well ordered meso-structure was obtained after extraction, in agreement with the result of N2 adsorption-desorption.
Online since: September 2019
Authors: Khaoula DERRAR, Imededdine Zerrouk, Nouhad Rouabah, Brahim Gasmi, Mourad Zaabat, Abdelkader Hafdallah
Structural analysis by X-ray diffraction showed that the deposited films are polycrystalline in nature with a tetragonal structure having a preferential orientation along with (1 1 0) plane.
These images indicate that the layers have a dense granular structure and uniform whose grains are very small and nanometric [3]. the presence main peaks on all the spectra characterizing Sn and O elements of SnO2.The presence of peaks relative to the elements Sn, O is due to the composition of the glass substrate used for the deposits.
Algamel, International Letters of Chemistry, Physics and Astronomy. 65 (2016) 80-90
These images indicate that the layers have a dense granular structure and uniform whose grains are very small and nanometric [3]. the presence main peaks on all the spectra characterizing Sn and O elements of SnO2.The presence of peaks relative to the elements Sn, O is due to the composition of the glass substrate used for the deposits.
Algamel, International Letters of Chemistry, Physics and Astronomy. 65 (2016) 80-90
Online since: November 2020
Authors: Alexander Boychenko, Dmitry Ovechenko
However, the Al2O3 film formed in Ac had a scaly structure without any ordering.
As can be seen from fig. 1a, the Al2O3 film preformed in DW is devoid of any clearly defined structure.
Its structure shows elements of cells with nanoscale pores (fig. 1b).
Thus, a structure is 1 μm b 1 μm d a 1 μm 1 μm c Fig. 1.
Odynets, Anodic oxidation of silicon in pure water, Journal of Physical Chemistry. 36 (1962) 2199-2204
As can be seen from fig. 1a, the Al2O3 film preformed in DW is devoid of any clearly defined structure.
Its structure shows elements of cells with nanoscale pores (fig. 1b).
Thus, a structure is 1 μm b 1 μm d a 1 μm 1 μm c Fig. 1.
Odynets, Anodic oxidation of silicon in pure water, Journal of Physical Chemistry. 36 (1962) 2199-2204
Online since: November 2012
Authors: Cheng Zhang, Li Huan Xu, Chang Su, Ling Min Wang, Qi Fei Huang, Jun Lei Liu
Simple and Rapid Synthesis of LiFePO4/C Composite for Lithium Rechargeable Batteries by Microwave-Solvothermal Method Assisted With Short Time Post-Treatment Process
Chang Su a, Junlei Liub, Lihuan Xu c, Lingmin Wangd, Qifei Huange, Cheng Zhang*
State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, International Sci.
It was worth noting that thanks to the rapid preparation, small size particle sample with olivine-type crystal structure had been obtained, which demonstrated an improved cell performance.
All the diffraction peaks of both samples could be indexed to an orthorhombic structure with a space group of Pnma ((JCPDS card No. 83-2092).
This clearly indicated that both samples were well crystallized and the carbon-coating process did not destroy the crystal structure of LiFePO4.
The ambient temperature for calcinations did not destroy the crystal structure and morphology.
It was worth noting that thanks to the rapid preparation, small size particle sample with olivine-type crystal structure had been obtained, which demonstrated an improved cell performance.
All the diffraction peaks of both samples could be indexed to an orthorhombic structure with a space group of Pnma ((JCPDS card No. 83-2092).
This clearly indicated that both samples were well crystallized and the carbon-coating process did not destroy the crystal structure of LiFePO4.
The ambient temperature for calcinations did not destroy the crystal structure and morphology.
Online since: November 2011
Authors: Harshal B. Nemade, N. Ramakrishnan, Roy Paily Palathinkal
a ramakrishnan@eng.monash.edu.my, b harshal@iitg.ernet.in, c roypaily@iitg.ernet.in
Keywords: Micro Resonant Sensors, MEMS, Nano-Pillars; Material modelling and simulation; SAW Sensors; High Aspect Ratio Structures;
Abstract.
Recently we reported mass loading effect of high aspect ratio resonant structures such as nano-pillars attached normal to the surface of a SAW resonator [2].
In practice it’s difficult to fabricate well defined resonating structures and there is more probability in ending up with structures which will closely resonate with the SAW device.
This observation is similar to the resonance frequency of high aspect ratio IDT structures reported by Laude et al. [6].
Johannsmann: Analytical Chemistry Vol. 82, (2010) p. 2237
Recently we reported mass loading effect of high aspect ratio resonant structures such as nano-pillars attached normal to the surface of a SAW resonator [2].
In practice it’s difficult to fabricate well defined resonating structures and there is more probability in ending up with structures which will closely resonate with the SAW device.
This observation is similar to the resonance frequency of high aspect ratio IDT structures reported by Laude et al. [6].
Johannsmann: Analytical Chemistry Vol. 82, (2010) p. 2237