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Online since: April 2024
Authors: Dodi Irwanto, Astri Arnamalia, Esti Wahyu Widowati, Endaruji Sedyadi
According to Gela (2016), at the right concentration, the film has a softer structure, decreased tensile strength, and increased elongation (Gela, 2016).
Sustainable Chemistry and Pharmacy. doi:https://doi.org/10.1016/j.scp.2019.100132 [33] Jridi, M., Abdelhedi, O., Salem, A., Kechaou , H., Nasri, M., & Menchari, Y. (2020).
Food Chemistry. doi:https://doi.org/10.1016/J.FOODCHEM.2021.131121 [57] Shankar, S., & Rhim, J. (2016).
Food Chemistry. doi:https://doi.org/10.1016/j.foodchem.2021.131624 [67] Utami, R, Kawiji, & Nurhartadi, E. (2012).
Edible Film of Native Jicama Starch, Agarwood Aetoxylon Boouya Essential Oil and Calcium Propionate: Processing, Mechanical, Thermal Properties and Structure.
Online since: May 2015
Authors: Jian Hua Zhou, Cong Mei Lin, Gui Yu Zeng
The structure of GO was characterized using XRD and SEM, the thermal decomposition of HMX and GO/HMX composite was analyzed by DSC/TG test.
The crystal structure of GO was determined by Bruker D8 Advance X-ray diffraction (XRD).
Results and Discussion Structure of GO.
Fig.2 The SEM images of graphite (a) and GO (b) SEM images reveal that the GO material has a lamellar structure and the exfoliated layered structure exhibits an agglomerated state, the film layer is thin, indicating the separation between the graphite layers is better and lower layer lamellar structure has been formed.
Chemistry of Materials, 3(1999) 771-778.
Online since: April 2012
Authors: Xiu Jian Zhao, Jun Xu, Wen Qing Shi, Pan Lei, Dong Lin Xia
This clearly proves that SnS thin films with annealing temperature above 200℃ were polycrystalline structure.
SEM micrographs demonstrate the films have intercross lamellar crystals structure, tubular channel between crystals can be seen.
The films are polycrystalline with orthorhombic structure.
Photovoltaic structures using chemically deposited tin sulfide thin films, Thin Solid Films 517(2009):2500-2502
Cathodic electrodeposition and analysis of SnS films for photoelectrochemical cells, Materials Chemistry and Physics 71 (2001) 40-46
Online since: January 2013
Authors: Gen Zong Song, Duo Zhang
ZnO is a novel kind of semiconductor material, which has hexagonal Wurtzite crystal structure, with a wide band-gap of 3.37eV at room temperature.
The effect of the doping proportion on the crystallization and energy band structure of the ZnO thin films were characterized by X-ray diffraction (XRD), the Infrared spectrum and the ultraviolet-visible transmission spectra (UV-Vis).The results show that the crystalline grain size of the ZnO doped films grown on glass substrates increases, since the thermal treatment temperature rise.
Acknowledgements This paper was financially funded by the Liaoning Natural Science Foundation (201102060) and also receives careful and patient guidance and assistance from Qiyang, a professor at the research institute of material physics and chemistry of Northeastern University.
Online since: July 2005
Authors: Štefan Kavecký, Pavol Šajgalík
Carbon Nanotubes Prepared by CVD Štefan Kavecký 1,a, Pavol Šajgalík2,b 1 Institute of Materials and Machine Mechanics, Slovak Academy of Sciences, Račianska 75, SK838 12 Bratislava, Slovakia 2 Institute of Inorganic Chemistry, Slovak Academy of Sciences, Dúbravská cesta 9, SK-842 36 Bratislava, Slovakia a ummskave@savba.sk, b uachsajg@savba.sk Keywords: Carbon nanotubes, nickel catalysts, chemical vapor deposition Abstract.
The drawback of the catalytic CVD-based nanotubes production is the inferior quality of the structures that contain large defects (twists, tilt boundaries, etc.), particularly because the structures are created at much lower temperatures (873-1273K) compared to the arc or laser processes (~2273 K) [2].
It has an open cell structure with randomly oriented struts.
The deposit of carbon MWNTs foam was hundreds µm thick and had skeleton structure similar to INCOFOAM TM catalyst, Fig. 3.
Carbon atoms (clusters) decomposed from a carbon source form tube structures at the surfaces of catalyst particles which act as seeds for the nucleation and growth of nanotubes.
Online since: December 2010
Authors: Wen Yuan Xu, Zhong Sheng Chen, Wei Ping Gong, Teng Fei Chen, Guo Lin Huang
Up to now, however, the formation mechanism and the structure of TNTs by hydrothermal approach have not been clarified yet.
The crystalline phase structure was determined by X-ray diffractometer (XRD, D/ruax2550PC, JEOL, Japan) using CuKα radiation, λ=0.154056 nm, 40kV/300mA, scan range of (2θ) 5-80°).
The structures of samples were measured by FT-IR with scan range of 4000-400 cm-1 (FT-IR Avatar 380, Thermo Nicolet Corporation, USA).
Clearly, a higher temperature higher than 110°C provides a strong driving force for rolling up the thin sheets, and thus results in tubular structures.
Kida, et al.: Procedia Chemistry, Vol.1 (2009), p. 192
Online since: March 2013
Authors: Xiu Ping Dong, Ming Ji Huang, Ya Ting Huang
Meanwhile, it can be produced into various shapes or structures according to concrete requirements.
Sample of porous metal filter and wires’ reticulate structures are displayed in Fig.1.
(a) Sample of metal filter (b) Model of metal filter (c) Wires’ reticulate structures Fig.1 Structures of porous metal filter Previous reports have studied its filtration performance while the application research in dairy industry is still suspending.
(a) Model of pores in metal filters (b) blocking effect Fig. 2 Mechanical blocking effect of metal filters Experiments 3.1 Experiment materials Cool-drawn 1Cr18Ni9 stainless steel wire of f0.15 and f0.3mm is selected and its mass chemistry compositions are as follows: 0.11%C,17.50%Cr,8.50%Ni,0.039%Ti,0.026%P,1.02%Mn.
(a) Structure of filtering device (b) collecting device Fig.3 Filtering experiment equipment Results and analysis Filtrated fluid, membranes and corresponding porous components in each group is shown in Fig. 4.
Online since: April 2012
Authors: Muhamad Kamil Yaakob, Muhd Zu Azhan Yahya, Mohamad Faris M. Taib
As proposed by Cohen [6], many research focus on the first principle study of ferroelectric perovskite materials due to their simple structure and interesting fundamental (Physics and Chemistry) [7].
The number of atoms in the unit cell was set to be five, and the positions of all atoms were optimized within the framework of the cubic (Pm3m) structure.
Fig. 1: Geometry structure of the cubic Pm3m phase of GeTiO3 Table 1: The born effective charge of the cubic Pm3m phase of GeTiO3 ZGe ZTi ZO┴ ZO║ Present Work 4.564 6.723 -2.899 -5.490 [16] 4.460 7.572 -2.860 -6.314 The calculated phonon dispersion curves along the high symmetry lines of the simple cubic GeTiO3 integrated over the whole of the first Brillouin zone (X, R, M and G points) is shown in Fig. 2.
Miura, First-principles study of ferroelectric and piezoelectric properties of tetragonal SrTiO3 and BaTiO3 with in-plane compressive structures, Solid State Commun. 150 (2010) 2350-2353
Nobes, Electronic structure, properties, and phase stability of inorganic crystals: A pseudopotential plane-wave study, Int.
Online since: June 2010
Authors: Chen Su, Hong Hong Liu, Bing Yu Sun, Yan Guo Shi
The relationship between structure and appearance has been studied by X-ray diffractometer, circular dichroism spectra[3], Differential Scanning Calorimetry[4], fluorescence spectrometer[5], fourier transform infrared spectroscopy and electrophoresis.
Further studies should be carried out to reveal the conformational changes in protein structure at different storage and package conditions.
Lakemond et al.in: Heat Denaturation of Soy Glycinin: Influence of pH and Ionic Strength on Molecular Structure(Agric.
In: Study on Structure-Emulsifying Properties Relationship of Yu-25 Soybean 11S Glycinin(China & International Soybean Conference & Exhibition, 2002) [6]Kin-Yu, C., Bruce, P.
(Cereal Chemistry 1993) [7] Chakraborty, P. in: Coconut protein isolate by ultrafiltration.
Online since: October 2014
Authors: Su Ran Wang, Da Xiang Nie, Meng Qi Zhong, Xi Du, Yu Chen Li, Ji Huang
Introduction When exposed to fire, the structure of concrete in terms of its physical and chemical nature is subject to calamitous changes.
Apparent Morphology and failure mode of the Samples after High Temperature After the temperature variation, the physical chemistry of polypropylene fiber reinforced concrete is basically identical to that of normal concrete.
Between 20°C – 300°C, the effect of the vaporization of the free unbound water in the interior of the concrete on the structure is relatively small.
Simultaneously, the outer edge of the samples tended to loosen in structure and started developing cracks
Effect of high temperature on the pore structure and strength of plain and polypropylene fiber reinforced cement pastes[J].