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Online since: October 2006
Authors: Aparna Gupta, Chacko Jacob
High resolution TEM (HRTEM) of nanoparticles was performed to study the crystal structure in detail.
High resolution TEM (HRTEM) was also performed to study the crystal structure, defects such as dislocations, stacking faults, twins etc.
Figure 2(c) is the HRTEM image showing the uniform distribution of lattice structure within the specific region marked by the box.
Winterer: Nanocrystalline Ceramics: Synthesis and Structure (Springer-Verlag Heidelberg Berlin-2002) [2] D.L.
Qian: Solid State Chemistry Vol. 177 (2004), p. 4163 Fig. 5.
Online since: April 2011
Authors: Helmut Mehrer
Composition and structure.
Structure and Composition.
Vogel, Glass Chemistry, Springer-Verlag, 1985
Mehrer, Physical Chemistry Chemical Physics 6, 3669 (2004)
Pavlovski, in: Structure of Glass, E.A.
Online since: November 2024
Authors: Dini Deviana Saputri, Wijang Wisnu Raharjo, Sentot Budi Rahardjo, Edi Pramono, Witri Wahyu Lestari, Dian Maruto Widjonarko, Sayekti Wahyuningsih, Teguh Endah Saraswati
Therefore, the ratio of ID/IG shows a structural change with regularity to disorder (defect) of the hexagonal carbon structure.
The catalyst particles are pushed upward due to diffusion and osmotic pressure, depositing carbon into the graphite structure beneath the catalyst.
This species combines with the reactive carbon in the Mag-CNF structure to form a new covalent bond between the Mag-CNF and the amine group.
-H., ACS Sustainable Chemistry & Engineering 8(9) (2020) 3844-3852
[17] Yaghoubi, A., Ramazani, A., Current Organic Chemistry 22(15) (2018) 1505-1522
Online since: January 2013
Authors: Guang Ming Cao, Yong Quan He, Tao Jia, Zhen Yu Liu, Xiao Jiang Liu
The structure of the oxide scale is complicated.
Structure of outer Fe oxide layer is confused.
The discussion of effect of temperature on structure of outer Fe oxide layer is not enough.
So the traditional scale structure can be observed clearly.
As shown in Fig. 8 structure of mixture of FeO/ Fe2SiO4 can be observed clearly.
Online since: September 2013
Authors: Guang Zhen Mo, Pai Peng, Zhao Yang Wang, Jin Feng Xiong
The structures of P(LA-co-MA)s are characterized by FT-IR, 1H-NMR, 13C-NMR and GPC.
Herein, their structures are systematically characterized by FT-IR, 1H-NMR, 13C-NMR and GPC.
The absorption at 3470 cm-1 is assigned to stretching vibration of O-H, while a characteristic peak at 3360 cm-1 is related to N-H bond in amide structure.
Owing to the same reason, the absorption strength of the bands at 1626, 1512 and 816 cm-1 assigned to the triazine ring structure from MA, also becomes smaller with the increase of LA content.
But the further 1H NMR calculation results of P(LA-co-MA)s show that the copolymers’ are not a simple star-shaped polymer, and their structures may be related to their molar feed ratios [12].
Online since: August 2019
Authors: George Gejo, Nellipparambil Vishwambharan Unnikrishnan, Anoop Chandran, P.G. Prajith, Mathew Simon Sanu, Runcy Wilson
Runcy Wilson, Department of Chemistry, St.
The thermo-mechanical properties of materials are studied to characterize their internal state and structure.
Wyckoff, Crystal Structures, New York, London: John Wiley & Sons,(1963)
Stokes, A New Structure of Carbon, Nature. 149 (1942) 328-328
Lu, Elastic properties of single and multilayered nanotubes, Journal of thephysics and chemistry of solids.58 (1997) 1649-52
Online since: August 2010
Authors: Soo Jin Park, Ki Ho Jung
Preparation and Characterization of Porous Si/Carbon Fibers Ki-Ho Junga and Soo-Jin Parkb Dept. of Chemistry, Inha University, 253, Nam-gu, Incheon 402-751, South Korea a kkyo038@inha.edu bsjpark@inha.ac.kr Keywords: Poly(amide imide), Electrospinning, Carbon fibers Abstract.
The morphologies and the crystalline structures of the Si/CFs were characterized by scanning electron microscopy (SEM) and X-ray diffractometer (XRD).
The experimental results indicated that the Si/CFs exhibited convoluted structure and wrinkled surface morphology.
After carbonization, all fibers exhibited convolute fiber structure and wrinkled surface morphology.
This improvement might be due to much developed pore structure of CFs.
Online since: November 2012
Authors: Kyung Ho Choi, Jae Young Kim, Sang Kug Lee, Gyo Jic Shin, Seung Yong Jeong
Synthesized particles typically formed cubic structure for good absorption of NIR, size observed as being 30-100 nm and <150 nm.
The oxygen deficiency in tungsten oxides leads to a complex-ordered structure known as the Magneli structure, while the ternary addition of the positive ions leads to the tungsten bronze structure.
Results and Discussion The hexagonal structure of the CsWO3 powder was confirmed both by Scanning electron microscope (SEM) and by X-ray diffraction (XRD).
Synthesized particles typically formed cubic structure for good absorption of NIR, size observed as being 30~100 nm and ≤ 150 nm.
Soc., 90, (2007),p. 4059 [3] Jing-Xiao Liu, Yoshihiko Ando, Xiao-Li Dong, Fei Shi, Shu Yin, Kenji Adachi, Takeshi Chonan, Akikazu Tanaka, and Tsugio Sato., Journal of Solid State Chemistry, 183, (2010), p. 2465 [4] L.
Online since: August 2004
Authors: Takayuki Watanabe, Hiroshi Funakubo, Takashi Iijima, Hirofumi Matsuda, Masahiro Kurachi, Seiichiro Koda, Hiroshi Uchida
Synthesis and Properties of Nd-substituted Bismuth Titanate Polycrystalline Thin Films with Polar-axis Orientation Masahiro Kurachi 1, Hirofumi Matsuda2, Takashi Iijima2, Hiroshi Uchida 1, Seiichiro Koda 1, Takayuki Watanabe 3 and Hiroshi Funakubo3 1 Department of Chemistry, Faculty of Science and Technology, Sophia University 7-1, Kioi-cho, Chiyoda-ku, Tokyo 102-8554, Japan 2 National Institute of Advanced Industrial Science and Technology, Tsukuba 305-8568, Japan 3 Department of Innovative and Engineered Materials, Tokyo Institute of Technology, Yokohama 226-8503, Japan Keywords: Bismuth layer-structured ferroelectrics, Chemical solution deposition, Orientation control, Poly-crystalline film, Lanthanoids ABSTRACT To gain a deep insight into the contribution of Nd-substitution, we have investigated structural phase transition behavior in Bi4-xNdxTi3O12 (BNT) powders derived from chemical solutions.
INTRODUCTION In recent years, bismuth layer structured ferroelectric thin films have intensively been investigated as candidate materials for nonvolatile ferroelectric random access memory (Nv-FeRAM) devices [1-3].
Related to that only single reaction was observed, not shown here but XRD profiles were also consisted with single phase BNT with BIT-type structure in the Nd-substitution range of x=0.0-0.75; no second phase, such as pyrochlore and titanium oxides, was detected in these samples.
The changes in phase transition behavior and crystal structure would affect the intrinsic Ps of bismuth titanate. 0 0.25 0.5 0.75 0.538 0.540 0.542 0.544 0.546 b-axis a-axis (a) 0 0.25 0.5 0.75 1.000 1.002 1.004 1.006 1.008 1.010 (b) Lattice parameters a, b [nm] a/b (Orthorhombicity) x in (Bi4-xNdx)Ti3O12 x in (Bi4-xNdx)Ti3O12 Fig. 3 Variations of (a) lattice parameters a and b and (b) orthorhombicity a/b in BNT crystalline powders derived from chemical solutions upon Nd-substitution.
Online since: August 2013
Authors: Chao Qian, Wen Yuan Gao, Chun Yuan Luo, Gui Shan Liu, Hong Shun Hao, Zhi Qiang Hu
Porous material has double properties on the structure and function [2-3].
The structure of FGD gypsum contains constitution water and FGD gypsum will lose constitution water when raising temperature.
Interlaced structure of mullite greatly enhanced the strength of the body.
The obtained FGD gypsum product showed hierarchically porous structure, possessing macropores, mesopores and micropores, simultaneously.
Silva: Journal of Materials Chemistry Vol.18 (2008), p. 4985-4993 [3] P.