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Online since: May 2020
Authors: Razif Muhammed Nordin, Muhammad Salihin Zakaria, Nadia Latiff, Wan Izhan Nawawi Wan Ismail, Zainal Arifin Mohd Ishak, Rizana Yusof
Ishak5,6,f 1Department of Chemistry, Faculty of Applied Sciences, Universiti Teknologi MARA, Perlis Branch, Arau Campus, 02600 Arau, Perlis, Malaysia 2Green and Functional Polymer Research Group, Universiti Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia 3Advanced Technology Training Center, Manpower Department, Ministry of Human Resource, 34600 Kamunting Taiping, Perak, Malaysia 4Center of Excellence Geopolymer and Green Technology, School of Materials Engineering, Universiti Malaysia Perlis, 01007, P.O Box 77, D/A Pejabat Pos Besar, Kangar, Perlis, Malaysia 5Science and Engineering Research Center, Universiti Sains Malaysia, Engineering Campus, 14300 Nibong Tebal, Pulau Pinang, Malaysia 6School of Materials and Mineral Resources Engineering, Universiti Sains Malaysia, Engineering Campus, 14300 Nibong Tebal, Pulau Pinang, Malaysia arazifmn@uitm.edu.my, bnadiasyaheeralatiff@gmail.com,crizana@uitm.edu.my, dwi-nawawi@uitm.edu.my, esalihin@unimap.edu.my
X-ray diffraction (XRD) pattern confirms the hexagonal wurzite structure of ZnO microparticles.
Attenuated total reflection fourier transform infrared spectroscopy (ATR-FTIR) (Perkin Elmer Spectrum One Series) is used to evaluate the chemical structure of ZnO with 32 consecutive scans in the range of 4000-500 cm-1 were recorded.
These results confirmed the hexagonal wurzite structure of ZnO [6] are in accordance with the values in the standard card (JCPDS 36-1451).
From XRD and SEM study, it reveals that ZnO microparticles have hexagonal wurzite structure which agglomerates and are of irregular shapes.
Online since: December 2005
Authors: Julius C. Schuster, Masaaki Naka
Interfacial Structure and Strength of Ceramic/Metal Couples Masaaki Naka 1 and Julius C.
The interface structure is formed by the diffusion path between SiC and metal.
Detailed knowledge of interfacial structures and strength SiC/metal couples are needed in order to control the interface structures in SiC/metal joints at high temperatures.
The interface structures depend on their kind of metals.
The thickness of interface structure of SiC/Fe increases with the bonding time, but does not change of the structure in the reaction zone.
Online since: January 2011
Authors: Mojmír Šob, V. Vitek, T. Káňa
Vitek3 1Institute of Physics of Materials, Academy of Sciences of the Czech Republic, Žižkova 22, 616 62 Brno, Czech Republic 2Department of Chemistry, Faculty of Science, Masaryk University, Kotlářská 2, 611 37 Brno, Czech Republic 3Department of Materials Science and Engineering, University of Pennsylvania, 3231 Walnut St., Philadelphia, PA 19104-6272, U.S.A.
These layers are the (110) atomic planes of the C11b structure, the (0001) planes of the C40 structure and the (001) planes of the C54 structure.
Similarly, the transformation path between the ideal C11b and C54 structures changes the ABAB stacking of C11b structure into the ADBC stacking of the C54 structure.
The third transformation path between the ideal C40 and C54 structures consists in changing the ABCABCABCABC stacking of the C40 structure into the ADBCADBCADBC stacking of the C54 structure.
These are the (110) layers in the C11b structure, the (0001) layers in the C40 structure and the (001) atomic layers in the C54 structure.
Online since: August 2022
Authors: Santosh A. Kadapure, Vinayak Adimule, Santosh S. Nandi, S.S. Kerur
ORCiD - http://www.orcid.org/0000- 0001-8609-2222 2Department of Chemistry, Angadi Institute of Technology and Management (AITM), Savagaon Road, Belagavi-5800321, Karnataka, India.
Furthest, by numerous artificial approaches, carbon can be custom-made in diverse structures since nano to bulk regime.
The traditional capacitors have massive and rigid structure and hence are not appropriate for future applications.
Gowda, Crystal Structure, Morphology, Optical and Super-Capacitor Properties of Srx: α-Sb2O4 Nanostructures.
Zeng, Intercalation and exfoliation chemistries of transition metal dichalcogenides, J.
Online since: November 2011
Authors: Jian Yi Wang, Mian Wang
Conformational changes of the wild-type hIAPP and the S20P mutant in water revealed by molecular dynamics simulations Mian Wang1, a, Jianyi Wang1, b 1College of Chemistry and Chemical Engineering, Guangxi University, Nanning 53004, P.
Secondary structure The secondary structures profiles of WT and S20P analyzed by the DSSP program are presented in Fig. 2A and 2B.
In the whole simulation the residues 14-18 in WT remain a stable α-helix structure, while the residues 14-18 in S20P transforms from the α-helix structure into a random coil structure after ~8 ns.
Moreover, the residues 19-28 in S20P faster change from the α-helix structure into the coil structure than those in WT.
Besides, WT has compacter structure than S20P.
Online since: April 2014
Authors: Md Eaqub Ali, Sharifah Bee Abd Hamid, Uda Hashim, Asing Asing
The development of highly sensitive, cost-effective and miniaturized biosensors and biochips requires advanced technology coupled with fundamental knowledge in chemistry, biology, and material sciences.
Fig. 4, Detection of the target DNA in the nanogap by SERS (a); the assembly of substrate –PNA–DNA–Zr–RB (b) and structure of RB (c) [9] (Adapted with permission from Cheng et al., 2008 [9]).
SERS is particularly strong candidate to meet these tasks due to high sensitive, selectivity and the fingerprinting enable to reveal the specific spectra from molecules structure and the boycott higher cost reagents and time consumable sample preparation steps which are associated others method such as polymerase chain reaction, immunoassays.
Das U.Hashim, DNA hybridization detection using less than 10-nm gap silicon nanogap structure, Sensors and Actuators A 199 (2013), 304– 309
Online since: February 2012
Authors: Yuan Lian, Dian Wu Huang
Microcapsules of jasmine oil with β-cyclodextrin wall were prepared that can sustain the release of the fragrance.This study examined the morphology, structures and partied size distributions.
It has special hydrophobic cavity structure.
For its appropriate sized cavity, most-accessible and low price, β-CD has been widely used in pharmaceutical industry, agriculture, chemistry and foodstuff.
Result and Discussion Structure of microcapsules Fig.2 shows the FTIR spectra of jasmine oil, β-CD and the microcapsules.
Online since: June 2012
Authors: Jia Sheng Li, Zhan Shou Yang, Shu Ya Wang, Xing Wu Zou, Shu Xuan Wang, Mi Xiang Qi
The SrCO3 powders were characterized by the XRD and SEM.The results show that the asprepared products were Spherical structure and with high dispersity, the average particle size of the SrCO3 powders synthesized by the ultrasonic wave synthetic technology is 0.3nm~ 0.5nm.
Finally, the white precipitate was centrifuged, washed with distilled water and ethanol, and dried at 100 °C. 1.2 Materials characterization The crystalline phases of the products were analyzed by XRD.The sizes and morphologies of the resulting products were studied by transmission electron microscopy (TEM). 2 Results and discussion 2.1 Structure characterization The XRD patterns shown in Fig. 1 were for the samples in a typical experiment, No peak of impurities was observed, confirming the formation of pure SrCO3.
The ultrasonic irradiation played an important role in the dispersity of SrCO3 powder; The results show that the asprepared products were Spherical structure and with high dispersity, the average particle size of the SrCO3 powders synthesized by the ultrasonic wave synthetic technology is 0.3nm~ 0.5nm
Tang, et al: Chinese Journal Of Inorganic Chemistry Vol. 28(2012), p.185
Online since: March 2011
Authors: Shi Zhong Wei, Liu Jie Xu, Xiang Dong Ma, Guo Shang Zhang, Ji Wen Li, Fei Lei Liu, Hui Zhang
The structure and morphology of zirconia were characterized by XRD and TEM.
With green chemistry increased and concerned, the enhancement of materials performance is increasingly required and room-temperature ionic liquids are more and more paid attention to.
Ionic liquid has own unique structure of the advantage and can be used as a template to control material structure of nanometer inorganic.
Online since: September 2011
Authors: Qiang Li, Dan Yu Jiang, Jie Song, Jin Feng Xia, Cai Xia Li
Synthesis, Structure and Properties of Super Fine Zn2SnO4 Jie Song 1,a, Caixia Li 1, Danyu Jiang 2, Jinfeng Xia 1, Qiang Li1,b* 1 Department of Chemistry, East China Normal University, Shanghai 200062, China 2 Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China a rz_115songjie@yahoo.com.cn, b qli@chem.ecnu.edu.cn Keywords: mechanochemical method; Zn2SnO4; photodegradation Abstract.
The structure, size and morphology of Zn2SnO4 were explored with X-ray diffraction (XRD), scanning electron microscopy (SEM) and nitrogen sorption analysis with the Brunauer-Emmett-Teller (BET) method.
It exhibits an inverse spinel crystal structure, in which one-eighth of the tetrahedral voids in a face-center-cubic close-packed oxygen sublattice are occupied by the Zn atoms while one-half of the octahedral voids are occupied by an equal number of Zn and Sn atoms [2].
XRD, SEM, BET were employed to study the structure of as-obtained Zn2SnO4 .