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Online since: August 2022
Authors: Mohammad Javed Ansari, Anshul Singh, Rahul Kanaoujiya, Devvret Verma, Jose Luis Arias Gonzales, Aziz Unnisa
MSN is hexagonal in design and makes use of existing chemical structures.
The basic surface chemistry of silica makes it easy to bind selected ligands to the particles in both techniques [4,6].
Because of their size and flexible chemistry, mesoporous nanomaterials are exploited as a bio-sensor elements.
Novel synthesis, structure and functions of mesoporous silica materials.
Structure and functionalization of mesoporous bioceramics for bone tissue regeneration and local drug delivery.
Online since: March 2013
Authors: Tan Winie, Ri Hanum Yahaya Subban, Nurul Hazwani Aminuddin Rosli, Nur Shazlinda Muhammad Hanif
Gray, Polymer Electrolytes, The Royal Society of Chemistry, UK, 1997
Wang, PAN-PEO solid polymer electrolytes with high ionic conductivity, Materials Chemistry and Physics 89 (2005) 390-394
Meibuhr, Effect of γ-radiation on the structure and ionic conductivity of 2-(-2-methoxy-ethoxy-ethoxy)polyphosphazane + LiCF3SO3, J.
Nishimoto, Effects of network structures and incorporated salt spesies on electrochemical properties of polyether-based polymer electrolytes, Solid State Ionics 79 (1995) 306-312
Solid State Chemistry 4 (1972) 294-310
Online since: April 2009
Authors: Clara Silvestre
As a consequence difficulties are not related only to handle materials at the nanometre level, but first of all to characterize and understand nanotechnology physics and chemistry properties.
In particular how: mechanical properties are dictated by particle size morphology and strength of interfaces (chemistry and roughness); thermal emissivity and conductivity are influenced by particle size and enhanced surface area/roughness and nano-scale voids; electrical conductivity and bandgap energy are influenced by nano structure defects and high aspect ratios; optical transparency and colour are dominated by size effects and photonic bandgap are controlled by size of nanostructure.
To master polymer nanotechnology physics and chemistry numerous and complementary methodologies are required.
To bridge the gap between scientific and engineering approaches towards improved understanding of the structure-performance correlation in polymer devices It is generally accepted that a better understanding of the structure-property relationships, i.e. of the relationships between composition, processing, structure/morphology, dynamics and properties, is a necessary condition for optimizing the design of polymer nanostructured materials with predicted properties.
This is due to the fact that at nanoscale level the expertise of researchers in physics, chemistry, biology and engineering is complementary.
Online since: January 2019
Authors: Mauricio Pacio, Carlos Bueno, Edith Osorio, Xairo Leon, Rene Pérez-Cuapio, Avelino Cortés, Héctor Juárez
The final porous silicon structure was made in two steps.
Fig. 3b exhibits two different (macro-PS and meso-PS) structures.
The built layers allowed us to obtain a macro/meso-PS structure.
This structure was dropped with a core-shell ZnO@SiO2 NP solution.
Alivisatos, Perspectives on the Physical Chemistry of Semiconductor Nanocrystals, Journal of Physical Chemistry, 100 (1996) 13226 – 13239
Online since: October 2010
Authors: Yi Ran Guan, Gui Fu Yang, Yu Bao, Bo Li
Amphetamine Detection Based on Surface Plasmon Resonance Techniques Yu Bao 1,a, Bo Li2,b and Yiran Guan3,c, Guifu Yang 3,d* 1 State Key Laboratory of Electroanalytical Chemistry,Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, P.R.
By introducing such a SPR detection, 10µg/ml amphetamine could be easily detected and compounds with similar molecular structure are also expected suitable for SPR detection.
Surface Plasmon Resonance (SPR) is a surface sensitive optical technique which has become widely used in the fields of chemistry and biochemistry such as detection and analysis for food, medicine, environment and safety monitoring.
Fig. 1 Structure of SPR equipment Fig. 2 Reflected intensity versus angle of incidence for SPR curve SPR measurement is usually performed in one of the two ways.
Compounds with similar molecular structure are also expected suitable for SPR detection. 0 10 20 30 40 50 60 0.2 0.3 0.4 0.5 Light Intensity / a.u.
Online since: December 2021
Authors: Harald Schmidt, Daniel Uxa, Helen J. Holmes, Kevin Meyer, Lars Dörrer
All Bragg peaks visible correspond to the hexagonal a-NaFeO2-type layered high temperature structure of crystalline LiCoO2 with R-3m space group [36-38].
Using the Scherrer formula on the various peaks the crystallites size can be assessed to about 70-100 nm, indicating a nano-crystalline structure.
A reflection on lithium-ion battery cathode chemistry.
Defect Physics and Chemistry in Layered Mixed Transition Metal Oxide Cathode Materials: (Ni,Co,Mn) vs (Ni,Co,Al).
Physical chemistry chemical physics 2015, 17 (7), 4799–4844.
Online since: August 2011
Authors: Ling Zhang, Ling Li, Zong Gang Mou, Xi Feng Li
Preparation and Characterization of BCN–TiO2 Nanoparticles Ling Zhang1,a, Ling Li2,b, Zonggang Mou2,c, Xifeng Li2,d 1School of Resource and Environment, University of Jinan, Jinan 250022,China 2Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials, School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022,China achm_zhangl@ujn.edu.cn, bnano_nano@126.com, cchm_mouzg@ujn.edu.cn, dlib_lixf@ujn.edu.cn Keywords: graphite-like structure BCN, BCN–TiO2, TiO2 Abstract: BCN–TiO2 was prepared by doping Ti(OH)4 with graphite-like structure BCN in an annealing process at 400[℃] for 2[h].
Graphite-like structure BCN was detected by XRD.
The results showed that with graphite-like structure BCN doped in, the crystal size became smaller than pure TiO2.
Here we successfully synthesized graphite-like structure B-C-N and target catalyst (BCN-TiO2 ).
The surface structure of the photocatalyst was observed using a QUANTA 200 scanning electron microscope (SEM).
Online since: April 2015
Authors: Yuan Bin She, Lu Hai Li, Mei Juan Cao, Zhi Cheng Sun, Zuo Lin Yang, Tian Yue Wu
DFT Study on Geometric and Electronic Structures Properties of Dye Sensitizers Meijuan Cao 1, Zhicheng Sun1 and Luhai Li1, Yuanbin She2,3, Zuolin Yang1, Tianyue Wu1 1Beijing Engineering Research Center of Printed Electronics, School of Printing and Packaging Engineering, Beijing Institute of Graphic Communication, Beijing, 102600, China; 2State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, College of 3Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, China; Institute of Green Chemistry and Fine Chemicals, College of Environmental & Energy Engineering, Beijing University of Technology, 100124, Beijing, China … Presenting author, Meijuan Cao, meijuancao@126.com; * Corresponding author, Luhai Li, liluhai@bigc.edu.cn.
In the basic porphyrin structure, the central two H+ ions were replaced by Mn2+, Fe2+, Co2+, Ni2+, Cu2+, Zn2+ for all the structures used.
Geometric structures of porphyrin The molar extinction coefficients were affected by several factors and the molecular structure of DSSC was the important one.
Figure 1 shows the optimized structures of dyes and the differences were found for the structures.
Fig. 2 Optimized structures of porphyrin sensitizers 2.
Online since: December 2011
Authors: Bao Rang Li, Yang Bai, Hong Xu, Naiqiang Zhang
The oxide layer was a typical dual-layered structure with a Fe-rich outer layer and a Fe-Cr-Ni-rich inner layer.
Oxygenated treatment is considered gradually to be the more effective chemistry water treatment method for ultra supercritical (USC) units because it can avoid flow accelerated corrosion [8].
These results indicated the based oxidation layer was probably consist of a thin Cr2O3 layer or spinel structure (Fe, Cr, Ni)3O4.
The BES-SEM cross-sectional image of the oxide layer was shown in Fig. 3, in which the corresponding chemistry composition profiles were also shown.
Dooley: Cycle chemistry guidelines for fossil plants: Oxygenated Treatment (EPRI, California 2005)
Online since: November 2011
Authors: Ming Tao Zhao, Yu Ting Liu, Da Wei Yin, Bo Ning Hui
Chemical structures have been confirmed by elemental annalysis and the spectral techniques of FTIR,1H NMR.
The structures of the compounds were established on the basis of their IR and 1H NMR spectral data.
The 1H NMR spectrum of the compoundIIIa showed δ:8.38 (s, 2H,H-C=N), 4.87~4.95 (m,8H,FcH), 2.05~2.10(s,6H,-CH3) that indicated the presence of Schiff base.1H NMR also supported the other compounds(IIIb~d) chemical structure.
All spectroscopic analysis confirmed the proposed structures for these compounds.
Williams:The Biological Chemistry of the Elements (Clarendon Press, Oxford, 1991)