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Online since: July 2010
Authors: Shinobu Fujihara, Itaru Honma, Hirofumi Matsuda, Eiji Hosono, Masashi Okubo, Tetsuiichi Kudo, Hao Shen Zhou
Especially, the fabrication of LiMn2O4 single crystalline nanowire was very interesting results because the synthesis of 1-dimesional single crystal structure of LiMn2O4 is very difficult based on cubic crystal structure without anisotropic structure.
However, the synthesis of 1-dimesional single crystal structure of LiMn2O4 is very difficult based on cubic crystal structure without anisotropic structure, although the Na0.44MnO2 based on tunnel structure [5] is easily grown to 1-dimensional direction.
Those nanowires construct the nonwoven fabric structure.
From Fig. 4(a), the top head morphology in the nanowires is a pyramidal structure.
Although the synthesis of 1-dimesional single crystal structure of LiMn2O4 is difficult because it is based on cubic crystal structure without anisotropic structure, the LiMn2O4 single crystalline nanowire is obtained thorough the self template method using Na0.44MnO2 nanowire.
Online since: October 2015
Authors: Ľudovít Kubičár, Ján Hudec, Danica Fidríková, Peter Dieška, Martin Vitkovič
The porous structure is characterized by a set of parameters that control its response to environment.
Introduction Historical objects consist of components with porous structure.
Moisture transport occurs into the porous structure.
Provided that the plaster structure is saturated with water.
In these conditions, the high level of moisture in the structure of sandstone was found.
Online since: February 2011
Authors: Zeng Ji Liu, Yu Hui Zhang, Quan Ji, Yan Zhi Xia
Xia 1, 2, d* 1 College of chemistry and engineering, Qingdao University, Qingdao 266071 2 State Key Laboratory Cultivating Base of New Fiber Materials and Modern Textile, Qingdao University, Qingdao 266071 aliuji198511@163.com, bjiquan@188.com, cqduzhyh@163.com, dpolymer@188.com Keywords: Target-substrate distance; RF magnetron sputtering; SEM; Relative deposition rate Abstract.
The films had island-like structures composed of nanoscale particles, and the surfaces were not flat.
Under certain sputtering conditions, these nanoparticles aggregated to form island-like structures but not bulky congeries, and the island-like structures combined in arrays of polygonal meshes.
That is to say, the fluorocarbon particles were not a disordered array but formed a regular island-like structure, as previously reported [10].
Online since: December 2011
Authors: Shu Hua Li, Yan Xia Hong, Wei Ming Lin, Hong Liang, Zi Li Liu
Perovskite-type Complex Oxides Catalyst Composed of Rare Earth-Alkaline Earth-Transition Metal Elements for Soot Combustion in the NO and O2 Atmosphere Hong Liang1, a, Shuhua Li1,b, Yanxia Hong1,c , Zili Liu1,d and Weiming Lin1,e 1School of Chemical and Chemistry, Guangzhou University, Guangzhou, China alhong@gzhu,edu,cn, bshleescut@163.com, c hongzhiwater@163.com, dgzdxlzl@163.com, elinweiming@gzhu.edu.cn Keywords: Complex Oxides; Perovskite-tpye Catalyst; Soot; NO; O2.
The results of XRD and FT-IR showed that La0.85K0.15CoO3 catalyst has the desired perovskite-type structure, ABO3.
,Ltd diffractometer equipped with a monochromator for the Cu-Kα radiation) was used on the catalyst to examine whether the desired perovskite structure was actually achieved.
It indicated that K was added into the crystal structure of the LaCoO3 and enhanced the diffraction peak of the LaCoO3 crystals.
Conclusions (1) The La0.85K0.15CoO3 catalyst was actually achieved the desired perovskite-type structure, ABO3. (2) In the NO-soot–O2 reaction system, NO can promote the catalytic activity of La0.85K0.15CoO3 Catalyst.
Online since: February 2011
Authors: Ya Tao Zhang, Yan Wu Zhang, Hao Qin Zhang, Jin Dun Liu
Finally, the micro-structure and flame resistance were characterized by scan electron microscope (SEM) and vertical burning method, respectively.
Introduction Nanocomposites, made up of epoxy and inorganic materials, have been an important subject of research not only because epoxy is one of the most vital type of thermosetting resins, widely used as surface coatings, adhesives, castings and laminates [1–3], but also because inorganic/epoxy nanocomposites may offer unique properties compared with conventional epoxy-based composites owing to their distinctive size, surface chemistry and topology [4–7].
Moreover, the micro-structure and flame resistance of HT-RP/EP nanocomposite were characterized by scan electron microscope (SEM) and vertical burning method.
The results showed that HT was dispersed in the epoxy matrix evenly and HT was not exfoliated with retaining layered structure.
HT with layered structure have greater surface area and more conducive to fire resistance.
Online since: January 2007
Authors: Patrick R. Briddon, Vitor Torres, J. Coutinho
We found metastable states, by 0.4, 0.4 and 0.5 eV, for structures where H is antibonding to the phosphorus atom for GaP, InP and ZnTe, respectively.
We will give special emphasis to their vibrational structure.
Structures where H is antibonding in the phosphorus side were found to be metastable by 0.4, 0.4 and 0.5 eV for GaP, InP and ZnTe, respectively.
The calculated quasi-harmonic stretching frequencies of the Zn-H-P unit for the BC structures agree, within 2%, with the fundamental transitions, Table 2.
[14] Information on http://webbook.nist.gov/chemistry.
Online since: October 2017
Authors: M. Kamil Abd-Rahman, R.M. Nor, S.N.M. Halim, Mohamad Fariz Mohamad Taib, Abdel Baset M.A. Ibrahim
Si (grey) O (red) H (white) Fig. 1: Structure of pure SiO2 glass The energy calculation of the constructed structure was performed by Spartan software using Molecular Mechanics.
The optical absorption of these three structures was calculated by using DFT from CASTEP computer code.
Yun-Ming, L., et al., Structure and properties of clay-based geopolymer cements: A.
Inorganic and Nano-Metal Chemistry, 2017. 47(6): p. 824-829
Okuno, M., et al., Structure of SiO2–Al2O3 glasses: Combined X-ray diffraction, IR and Raman studies.
Online since: October 2010
Authors: L. Perazolli, G.F. Pegler, M.R.A. Silva, R.A.F. Ingino, J.A. Varela
Venezia, Surface Characterisation of Metal Ions Loaded TiO2 Photocatalysts: Structure–Activity Relationship, Applied Catalysis B: Environmental, Vol. 48, (2004), p. 223–233
Fang Morphology and properties of ultrafinne SnO2-TiO2 coupled semiconductor particles, Materials Chemistry and Physics Vol. 62 (2000) p.62-67
Lu Rapid Synthesis of Nanocrystalline TiO2/SnO2 Binary Oxides and Their Photoinduced Decomposition of Methyl Orange, Journal of Solid State Chemistry Vol. 165, (2002), p. 193-198
Wold Effect of Silver on the Photocatalytic of TiO2, Journal of Solid State Chemistry, Vol. 106, (1993) p. 288-294
Mills, and S.Le Hunte, An overview of semiconductor photocatalysis, Journal of Photochemistry and Photobiology A: Chemistry Vol.108, (1997), p.1-35.
Online since: July 2013
Authors: M. Amin Bhat, Imtiyaz H Lone
Synthesis, Molecular properties and MIC Studies of D-ring chalcone derivatives of 20-keto pregnenolone Imtiyaz H Lone 1, a, M AMIN BHAT 2,b 1Department of Chemistry, IGNOU, New Delhi, 110068, India 2Department of Biomedical Engineering, Sathyabama University, Rajiv Gandhi Salai, Chennai - 600119, India Email. ahussainjamia5@gmail.com, b aminbio3@gmail.com, Key words: Chalcone; Pregnenolone; Molecular properties; MIC; Antimicrobial Abstract An efficient and simple synthesis of 17-chalconyl derivatives of pregnenolone and their antibacterial and antifungal evaluation is reported.
Experimental protocol Chemistry Solvents and organic reagents were purchased from Sigma Aldrich, Merck (Germany) and Loba Chemie (India) and were used without further purification.
Results and discussion Chemistry Present study was undertaken to synthesize some novel D-ring chalcone derivatives of 20-keto pregnenolone to investigate their probable antibacterial effects.
The structure of all the compounds was confirmed using NMR, IR, mass spectrometry, and elemental analysis.
[17] Hammam AG, Abdel-Hafez NA, Midura WA, Mikolajczyk M (2000) Chemistry of seven membered heterocycles.
Online since: July 2024
Authors: Anisya Tri Kurniawati Anwar, Dyah Ayu Nastiti, Muhammad Reza, Achmad Sjaifullah, Busroni Busroni
This research was conducted in the Organic Chemistry laboratory, Department of Chemistry, Faculty of Mathematics and Natural Sciences, University of Jember.
The length of the deproteination and demineralization process will increase the amount of protein and minerals that can be separated from the chitin structure.
The concentration variation used is included in the high concentration, which is above 50% because chitin has a long crystalline structure with strong hydrogen bonds between nitrogen atoms and carboxylic groups [22].
This hydrogen bond gives strength to the molecular structure of chitosan so that the chitosan becomes denser or thicker.
Structure, properties and applications,” Mar.