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Online since: July 2023
Authors: Volodya A. Harutyunyan
The fundamental properties and synthesis methods of different core/shell and core/multiple shell structures of II–VI, IV–VI, and III–V semiconductors and it is possible applications in biology, chemistry, physics, and engineering are discussed in Reviews [1-3].
The possibility of using such structures in nanodevices, in which the electron motion along the outer surface of the structure dominates, is shown also in this work.
Regarding the geometric dimensions of the structure under consideration, also note that it is consider a core/shell/shell structure of large radius when the condition L2<Mishra, Core-Shell Nanostructures: Perspectives towards Drug Delivery Applications, Journal of Materials Chemistry B, Manuscript ID TB-REV-06-2020-001559.R1, 2020, pp.1-105
Liu, Studies of Electronic Raman scattering in CdS/HgS cylindrical quantum dot quantum well structures, Thin Sol.
The possibility of using such structures in nanodevices, in which the electron motion along the outer surface of the structure dominates, is shown also in this work.
Regarding the geometric dimensions of the structure under consideration, also note that it is consider a core/shell/shell structure of large radius when the condition L2<
Liu, Studies of Electronic Raman scattering in CdS/HgS cylindrical quantum dot quantum well structures, Thin Sol.
Online since: November 2014
Authors: Chang Ming Cheng, Hai Long Zhu, Hong Hui Tong, Fa Zhan Yang, Qin Wang
The X-ray diffraction analysis reveals that the spheroidized alumina powder had mixed crystal structures with a stable α phase and a part of metastable phase.
Effect of plasma power and precursor size distribution on alumina nanoparticles produced in an inductively coupled plasma (ICP) reactor, [C]//19th International Symposium on Plasma Chemistry, Bochum, Germany, , 2009, Paper 011.03
Effect of plasma power and precursor size distribution on alumina nanoparticles produced in an inductively coupled plasma (ICP) reactor, [C]//19th International Symposium on Plasma Chemistry, Bochum, Germany, , 2009, Paper 011.03
Online since: September 2013
Authors: Jun Wang, Shao Hua Fan, Wei Qian Zhao, Wu Ke Li, Xue Lian Lu
Fabrication of bifunctional SiO2/Europium-polyoxometalates/Ag particles and their luminescence and catalysis properties
Jun Wang1, a, Shaohua Fan1, b, Weiqian Zhao1, c, Wuke Li1, d, Xuelian Lu1, e
1 College of Chemistry, Central China Normal University, Wuhan, 430079, China
a junwang924@mail.ccnu.edu.cn, b fanshaohua927@yahoo.cn, c 897288690@qq.com,
d liwuke@mail.ccnu.edu.cn, e lyluxuelian@qq.com
Keywords: Luminescence; Silica; Catalysis; nanoparticles, Ag
Abstract.
They are outstanding in their topological and electronic versatility, which have been extensively applied in many fields such as analytical chemistry, material science, and medicine [1-4].
Fabrication of bifunctional particles with designed structures is one of the most important goals in the development of advanced materials.
Not only are nanoparticles and their higher-order assemblies important for optics, catalysis, and sensing applications, but they are also interesting from a fundamental point of view in understanding and developing new self-assembled structures and materials.
In this study, the polyethyleneimine was employed to modify the surface of Stöber silica, since it is a cationic polymer with branched structure in which plentiful amine groups can bond with both metal ions and negatively charged colloids.
They are outstanding in their topological and electronic versatility, which have been extensively applied in many fields such as analytical chemistry, material science, and medicine [1-4].
Fabrication of bifunctional particles with designed structures is one of the most important goals in the development of advanced materials.
Not only are nanoparticles and their higher-order assemblies important for optics, catalysis, and sensing applications, but they are also interesting from a fundamental point of view in understanding and developing new self-assembled structures and materials.
In this study, the polyethyleneimine was employed to modify the surface of Stöber silica, since it is a cationic polymer with branched structure in which plentiful amine groups can bond with both metal ions and negatively charged colloids.
Online since: February 2021
Authors: Md Supar Rohani, Nur Athirah Mohd Taib, Hasim Nurhafizah
Raju, Structural and Optical Studies of Sm3+ ions Doped Niobium Borotellurite Glasses, Journal of Molecular Structure 1029 (2012) 53-59
Day, Structure and Non-Linear Optical Performance of TeO2 Nb2O5-ZnO Glasses, Journal of Non-Crystalline Solids 336 (3) (2004) 189-194
Raut, Determination of Stability constant of Pr(III) and Nd(III) Chelates with some Substituted Pyrazoles, Oriental Journal of Chemistry 25(4) (2009) 1093-1096
Samavati, Effect of AgCl on Spectroscopic Properties of Erbium doped Zinc Tellurite Glass, Journal of Molecular Structure 1035 (2013) 6-12
Reddy, EPR and Optical Studies on Transition Metal doped LiRbB4O7 Glasses, Journal of Physics and Chemistry of Solids 64 (2003) 261-264
Day, Structure and Non-Linear Optical Performance of TeO2 Nb2O5-ZnO Glasses, Journal of Non-Crystalline Solids 336 (3) (2004) 189-194
Raut, Determination of Stability constant of Pr(III) and Nd(III) Chelates with some Substituted Pyrazoles, Oriental Journal of Chemistry 25(4) (2009) 1093-1096
Samavati, Effect of AgCl on Spectroscopic Properties of Erbium doped Zinc Tellurite Glass, Journal of Molecular Structure 1035 (2013) 6-12
Reddy, EPR and Optical Studies on Transition Metal doped LiRbB4O7 Glasses, Journal of Physics and Chemistry of Solids 64 (2003) 261-264
Online since: July 2023
Authors: Adhitasari Suratman, Dwi Siswanta, Farida Ariani
Synthesis of Dialdehyde Carboxymethyl Cellulose-Crosslinked-Chitosan for Preconcentration of Cu(II) Using Batch Method
Farida Ariania, Adhitasari Suratmanb and Dwi Siswantac*
Department of Chemistry, Faculty of Mathematics and Natural Sciences,
Universitas Gadjah Mada, Sekip Utara, POB Bls 21, Yogyakarta, 55281, Indonesia
afarida30ariani@mail.ugm.ac.id, badhitasari@ugm.ac.id, cdsiswanta@ugm.ac.id
Keywords: preconcentration, Cu(II), chitosan, dialdehyde carboxymethyl cellulose
Abstract.
FTIR spectra of CS-DCMC before and after adsorption The characterization of CS-DCMC using SEM (Fig. 4) showed that CS-DCMC has a complex and loose structure suitable for molecular diffusion and provides sufficient free space for Cu(II) molecules.
The DCMC will bind chitosan molecules so that they will form a tighter and stronger structure (Fig. 4a and 4b).
The self-crosslinking causes the structure of the adsorbent to be less stable so that some of the adsorbents dissolve when applied for preconcentration of Cu(II) because chitosan itself is very soluble in acidic conditions [21].
The initial concentration of Cu(II) could not be detected using AAS because it was below the detection limit of AAS (0.5 mgL-1 is the detection limit of AAS at the Laboratory of Analytical Chemistry, MIPA, UGM).
FTIR spectra of CS-DCMC before and after adsorption The characterization of CS-DCMC using SEM (Fig. 4) showed that CS-DCMC has a complex and loose structure suitable for molecular diffusion and provides sufficient free space for Cu(II) molecules.
The DCMC will bind chitosan molecules so that they will form a tighter and stronger structure (Fig. 4a and 4b).
The self-crosslinking causes the structure of the adsorbent to be less stable so that some of the adsorbents dissolve when applied for preconcentration of Cu(II) because chitosan itself is very soluble in acidic conditions [21].
The initial concentration of Cu(II) could not be detected using AAS because it was below the detection limit of AAS (0.5 mgL-1 is the detection limit of AAS at the Laboratory of Analytical Chemistry, MIPA, UGM).
Online since: April 2009
Authors: Ramesh Chandra Agarwala, Vijaya Agarwala, Rohit Kumar Gupta, Sunayan Thakur, Bhanu Pant
The ordered structure of aluminides that makes them useful for high temperature application
renders them brittle at ambient temperature.
It clearly shows that the structure is highly deformed and amorphous.
The formed multilayer structure as dominant in the ball milled powder sample (30 hrs ball milling at 200 rpm, Fig. 6b) could increase the contact area of different particles thereby enhancing the inter diffusion process.
Froes, in: Synthesis and thermal stability of nano-RuAl by mechanical alloying, Interfacial Chemistry and Engineering 2000-Annual Report.
Raghavendra: J Mater Chemistry, 13 (10) (2003), p. 2586
It clearly shows that the structure is highly deformed and amorphous.
The formed multilayer structure as dominant in the ball milled powder sample (30 hrs ball milling at 200 rpm, Fig. 6b) could increase the contact area of different particles thereby enhancing the inter diffusion process.
Froes, in: Synthesis and thermal stability of nano-RuAl by mechanical alloying, Interfacial Chemistry and Engineering 2000-Annual Report.
Raghavendra: J Mater Chemistry, 13 (10) (2003), p. 2586
Online since: September 2014
Authors: Fábio Pereira Ramanery, Alexandra Ancelmo Piscitelli Mansur, Herman Sander Mansur
As expected, EDX chemical analysis indicated Cd and Se as the major elements of the core QDs and the core-shell structures presented Cd, Se and S elements.
Besides, as expected, the PL spectra of core-shell structures show a small red-shift with the coverage of CdS.
Conclusions In this research CdSe/CdS core-shell quantum dots were produced using a biocompatible polymer and a route based on aqueous colloidal chemistry at room temperature.
The results have evidenced that CdSe/CdS core-shell structures were formed with enhanced fluorescent behavior as compared to the CdSe core.
(B) Intensity of fluorescence obtained of CdS core and core-shell structures for excitation wavelength 365 nm (UV).
Besides, as expected, the PL spectra of core-shell structures show a small red-shift with the coverage of CdS.
Conclusions In this research CdSe/CdS core-shell quantum dots were produced using a biocompatible polymer and a route based on aqueous colloidal chemistry at room temperature.
The results have evidenced that CdSe/CdS core-shell structures were formed with enhanced fluorescent behavior as compared to the CdSe core.
(B) Intensity of fluorescence obtained of CdS core and core-shell structures for excitation wavelength 365 nm (UV).
Online since: May 2025
Authors: Muhammad Ragil Saputra, Endah Puji Astuti, Rosydatul Khoiriyah, Paskaline Sophie Rinjani, Citra Intan Rizky Azzahra, Ilham Alkian, Zalfa Alfatinnisa, Mohammad Wahyu Andriyan
Morphological research reveals all SPEs exhibit porous structures and demonstrate contact with the electrolyte, however LiBOB cellulose does not effectively absorb the electrolyte.
Structures of the electrolyte salts [16].
This proves that the pure cellulose structure has sufficient thermal stability to withstand high temperatures without experiencing significant physical degradation.
The cellulose-LiTFSI exhibited the highest uptake and retention value of electrolytes, suggesting strong bonds and compatibility with the cellulose structure.
Wu et al., ‘Incombustible solid polymer electrolytes: A critical review and perspective’, Journal of Energy Chemistry, vol. 93, pp. 264–281, Jun. 2024, doi: 10.1016/J.JECHEM.2024.01.013
Structures of the electrolyte salts [16].
This proves that the pure cellulose structure has sufficient thermal stability to withstand high temperatures without experiencing significant physical degradation.
The cellulose-LiTFSI exhibited the highest uptake and retention value of electrolytes, suggesting strong bonds and compatibility with the cellulose structure.
Wu et al., ‘Incombustible solid polymer electrolytes: A critical review and perspective’, Journal of Energy Chemistry, vol. 93, pp. 264–281, Jun. 2024, doi: 10.1016/J.JECHEM.2024.01.013
Online since: September 2013
Authors: Xing Long Xie
Energy consumption in the Chinese rural areas features massive use of low-grade energy commodities and the distempered structure of exorbitant leaning on biomass energy.
First, the study depicts the model’s structure and working process, and the methodology of estimating its energy flows.
Input, output, natural and auxiliary energy, were quantified by virtue of either Bian’s methodology (2000) or set forth hereinbefore within the three structures of planting, breeding, and anaerobism [9]. 4.
Chen, and Y.Liu: Standardized Structure Design of Tetrad-ecoagricultural Pattern in North China, Chinese Journal of Eco-Agriculture Vol.16 (2008), p.1279-1282
[9] Y.Sh.Bian, in: Salvaged Material Tackling and Re-use in Ecological Agriculture, Chemistry & Chemical Industry Publisher, Beijing (2000)
First, the study depicts the model’s structure and working process, and the methodology of estimating its energy flows.
Input, output, natural and auxiliary energy, were quantified by virtue of either Bian’s methodology (2000) or set forth hereinbefore within the three structures of planting, breeding, and anaerobism [9]. 4.
Chen, and Y.Liu: Standardized Structure Design of Tetrad-ecoagricultural Pattern in North China, Chinese Journal of Eco-Agriculture Vol.16 (2008), p.1279-1282
[9] Y.Sh.Bian, in: Salvaged Material Tackling and Re-use in Ecological Agriculture, Chemistry & Chemical Industry Publisher, Beijing (2000)
Online since: May 2013
Authors: Xiao Juan Chen, Liu Chun Yang, Jun Feng Zhang, Yan Huang
It was found that calcination played an important role in the whisker structure through changing the content of crystal water and the morphology.
Calcium sulfate dihydrate has been shown a layered structure (space group: C 2/c).
The layered structure may be illustrated as the low-angle XRD diffraction pattern [9].
Semmingsen: Acta Crystallographica Section B: Structural Crystallography and Crystal Chemistry Vol. 38 (1982), p. 1074
McCarthy: Spectroscopy and structure of metal chelate compounds.
Calcium sulfate dihydrate has been shown a layered structure (space group: C 2/c).
The layered structure may be illustrated as the low-angle XRD diffraction pattern [9].
Semmingsen: Acta Crystallographica Section B: Structural Crystallography and Crystal Chemistry Vol. 38 (1982), p. 1074
McCarthy: Spectroscopy and structure of metal chelate compounds.