Current Development Of Quantum Dots Based Electrochemiluminescence Immunosensors,
2013
State Key Laboratory of A nalytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
Current Development Of Quantum Dots Based Electrochemiluminescence Immunosensors, Ling-Ling Li, Qian Lu, Jun-Jie Zhu
Journal of Electrochemistry
Electrochemiluminescence exhibits the merits of both luminescence and electrochemistry analysis, and has been extensively employed in biosensors. Quantum dots are considered one of the three main kinds of electrochemiluminescence luminophores due to their unique properties. This paper briefly reviews the classification and signal amplification technology of quantum dots based electrochemiluminescence immunosensors. Future research trends are also suggested.
Properties Of Carbon Coated Tin Negative Electrode For Lithium-Ion Battery,
2013
School of Chemical Engineering, Dalian University of Technology, Dalian 116024, Liaoning, China
Properties Of Carbon Coated Tin Negative Electrode For Lithium-Ion Battery, Gui-Chang Liu, Xiao-Xiao Shen, Li-Da Wang
Journal of Electrochemistry
Carbon coated tin power was prepared by decomposing glucose applying a hydrothermal method, and was further used as the active material for negative electrode of lithium secondary battery. Charge-discharge tests show that the carbon coated tin electrode with the addition of 5 wt.% acetylene black as a conductive agent could obtain an initial discharge capacity of 967 mAh·g-1 and a discharge capacity of 362 mAh·g-1 after 50 cycles, which is much higher than that of tin electrode (166 mAh·g-1 after 50 cycles). The coated carbon hinders the agglomeration of tin powder, reduces the irreversible capacity loss of …
Electrochemical Synthesis Of Hierarchical Dendritic Polyaniline Nanostructures,
2013
Department of Pharmaceutical Analysis, Faculty of Pharmacy, Fujian Medical University, Fuzhou 350004, China
Electrochemical Synthesis Of Hierarchical Dendritic Polyaniline Nanostructures, Shao-Huang Weng, Jian-Zhang Zhou, Zhong-Hua Lin, Xin-Hua Lin
Journal of Electrochemistry
In this work, the p-TSA doped and hierarchical dendritic nanostructured polyanilines (PANI) have been prepared by potentiostatic electropolymerization without using any templates at room temperature. The mechanism of the polymerization has been discussed according to the electrodeposition curves. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) were employed to confirm the formation of uniform hierarchical dendritic structure on PANI. UV-Vis spectroscopy (UV-Vis) and infrared spectroscopy (FTIR) proved that the prepared PANI is in the form of emeraldine salt. The templateless electrodeposition method is simple, easy to operate, can be applied to fabricate other nanostructures of conducting polymers.
Performance Of Vn As Negative Electrode Materials In Electrochemical Capacitors,
2013
College of Chemical and Environmental Engineering, China University of Mining and Technology, Beijing 100083, China
Performance Of Vn As Negative Electrode Materials In Electrochemical Capacitors, Zhao-Hui Gao, Hao Zhang, Gao-Ping Cao, Min-Fang Han, Yu-Sheng Yang
Journal of Electrochemistry
Nanocrystalline vanadium nitride (VN) materials were synthesized by high temperature ammonia (NH3) reduction of vanadium oxide (V2O5). The structure and morphology of VN materials were characterized by XRD, SEM and TEM, while the specific surface area, pore size distribution and supercapacitive behavior by N2 absorption, cyclic voltammetry (CV) and constant current charge-discharge measurements in 1 mol·L-1 KOH electrolyte. The results showed that the VN sample belonged to the cubic crystal system (Fm3m [225]), and had homogeneous surface and appeared nearly spherical with uniform size. As the reaction time was extended to 12 h, …
A Comparative Study Of Ce3+/Ce4+ Redox Couple On Pt Electrode In Sulfuric Acid And Methanesulfonic Acid,
2013
State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Zhejiang University of Technology, Hangzhou 310014, China;
A Comparative Study Of Ce3+/Ce4+ Redox Couple On Pt Electrode In Sulfuric Acid And Methanesulfonic Acid, Zhao-Hua Li, You-Qun Chu, Chun-An Ma
Journal of Electrochemistry
The electrochemical oxidations of Ce3+ to Ce4+ on Pt rotating disk electrode (RDE) in both sulfuric acid and methanesulfonic acid (MSA) solutions were studied by using cyclic voltammetry and linear sweep voltammetry. The complexing behaviors of Ce3+/Ce4+ were preliminarily probed and the exchange current density, diffusion coefficient, as well as reaction rate constant were obtained from Butler-Volmer equation. The activation energies of Ce3+ oxidation on Pt electrode in two types of acidic media, obtained from Arrhenius equation, were also compared. The results indicate that Ce3+ can be oxidized to Ce4+ much easier in …
Current Statuses And Prospects Of Bioeletrochemical Instruments,
2013
1. State Key Laboratory of Physical Chemistry of Solid Surfaces, CNRS LIA XiamENS and College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, China; ;
Current Statuses And Prospects Of Bioeletrochemical Instruments, Ren Hu, Chun-Hui Piao, Chang-Jian Lin, Dong-Ping Zhan, Bin Ren, Amatore Christian, Zhong-Qun Tian
Journal of Electrochemistry
Charge transfer is one of the essential life processes. In the past decades, the electrochemical methods have been developed to study life science in a unique physicochemical view and have exhibited abundant and precious information beyond conventional biological techniques. As bioelectrochemical research areas evolved from the fundamental studies of biomolecules’ electrochemical behaviours in non-living conditions to the living cells in intro and in vivo, and further to the single molecule in living systems, the role of instruments becomes more and more crucial. The performances of instruments such as sensitivity, resolution (time, spatial and eneygy resolutions) and controllability are more demanding …
Synthesis And Electrocatalysis Of Pdcu Alloy Nanocrystals,
2013
State Key Laboratory of Eleetroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
Synthesis And Electrocatalysis Of Pdcu Alloy Nanocrystals, Hai-Bin Wu, Rui-Zhong Zhang, Wei Chen
Journal of Electrochemistry
Monodispersed PdCu alloy nanoparticles were synthesized by co-reduction of Cu(acac)2 and Pd(acac)2 with 1, 2-hexadecanediol. The spherical and popcorn-like shapes of PdCu alloy nanoparticles were obtained by changing the ratios of mixed surface protecting ligands of 1-octadecene, and oleylamine or oleic acid. TEM and XRD measurements showed that both PdCu nanoparticles are alloy nanocrystals dominated with (111) planes and the average sizes are 12.7 ± 0.18 and 20.4 ± 0.31 nm for he spherical and popcorn-like PdCu nanoparticles, respectively. The electrocatalytic activities of the PdCu nanocrystals for formic acid oxidation were evaluated by electrochemical cyclic voltammetry (CV). The result showed …
Analysis Of The Material Factors In The Degradation Of Sofc Performance,
2013
School of Chemical Engineering and Technology, Harbin Institute of Technology, Harbin 150001, China
Analysis Of The Material Factors In The Degradation Of Sofc Performance, Ke-Qing Gao, Xiao-Tian Liu, Qing Zhao, Li-Quan Fan, Yue-Ping Xiong
Journal of Electrochemistry
Based on the cell operating conditions, the material factors which influence the cell performance of SOFC including the chemical stability of materials at solid-gas interface in redox atmosphere, the diffusion and reaction between the interface of solid-solid materials, and degradation caused by the external chemical substances brought into the cells at triple phase boundary are mainly analyzed. Given that under the current state of the research it is urgent to explore the material factors on degradation of cell performance to meet demands in SOFC applications.
Fabrication And Localized Surface Plasmon Resonance Of Ultrathin Nanoporous Gold Films,
2013
Department of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China;
Fabrication And Localized Surface Plasmon Resonance Of Ultrathin Nanoporous Gold Films, Shi Feng, Shu Chen, Qing Yang, Juan Xiang
Journal of Electrochemistry
Ultrathin nanoporous gold films (NPGF) with a thickness of approximately 50 nm were fabricated via electrochemical dealloy method. The morphology of NPGF was evaluated with a parameter of surface roughness. SEM results demonstrate that the fabrication of NPGF with different roughness factors can be achieved by controlling the circles of cyclic voltammetry. UV-Vis spectra indicate that the localized surface plasmon resonance (LSPR) of NPGF is affected by the roughness of NPGF. With the optimal roughness factor, NPGF displays a linear relationship between the ethanediol concentration and the absorbance intensity at λ = 450 nm. The LSPR effect of NPGF presents …
Synthesis And Electrochemical Performance Of Si/C Composite Modified By Pani,
2013
State Key Laboratory for Surface Physics & Chemistry, China Academy of Engineering Physics, Mianyang 621907, Sichuan, China;
Synthesis And Electrochemical Performance Of Si/C Composite Modified By Pani, Guang-Hui Zhang, Pei-Kang Shen, Ge Sang, Ren-Jin Xiong
Journal of Electrochemistry
Silicon/carbon (Si/C) composite materials were prepared through high-energy ball milling and high-temperature solid-phase method, and then coated with thin polyaniline (PAni) film by oxidation. The microstructure and component of the composites were characterized by SEM, XRD, IR, TG, and the electrochemical performance was investigated by cyclic voltammetry (CV) and galvanostatic charge-discharge tests. The results showed that the surface of PAni/Si/G/C composite was coating with complete lamellar structure of PAni film. Its reversible capacity was 784 mAh·g-1 and 690 mAh·g-1 could be maintained after 50th charge-discharge cycles.
Electrochemical Activities Of Oxygen-Doped Carbon Surface For V(Iv)/V(V) Redox Couple,
2013
State Key Lab of Physical Chemistry of Solid Surfaces, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, China;
Electrochemical Activities Of Oxygen-Doped Carbon Surface For V(Iv)/V(V) Redox Couple, Huan Zhang, Lin-Lin Qin, Yi-Ning Shi, Ming-Sen Zheng, Quan-Feng Dong, Zhao-Wu Tian
Journal of Electrochemistry
Graphite plate electrodes were treated with oxygen plasma and doped with oxygen as well as oxygen functional groups. With the treatment, the activities of graphite plate electrodes toward VO2+/VO2+ redox reactions were improved. FT-IR and EDS analysis results indicated that oxygen functional groups were introduced to the surface of graphite plates after oxygen plasma treatment. In this paper, the graphite plate treated for 20 min showed the highest activity. The average charge efficiency reached 91%, suggesting an increase of 19%, compared with that of the untreated graphite plate under a current density of 8 mA·cm-2 …
Patent: Dual Function Proteins For Treating Metabolic Disorders,
2013
Novartis Institutes for BioMedical Research
Patent: Dual Function Proteins For Treating Metabolic Disorders, Brian R. Boettcher, Shari L. Caplan, Susan E. Cellitti, Douglas S. Daniels, Norio Hamamatsu, Bernhard Hubert Geierstanger, Stuart Licht, Andreas Loew, Stephen Craig Weldon
Chemistry Faculty Publications
The present invention relates to new proteins comprising fibroblast growth factor 2 1 (FGF21 ) and other metabolic regulators known to improve metabolic profiles in subjects to whom they are administered.
Novel Algorithms And Instrumentation For Vibrational Spectroscopic Methods Of Analysis,
2013
Old Dominion University
Novel Algorithms And Instrumentation For Vibrational Spectroscopic Methods Of Analysis, Mohamed F. Abdelkader
Chemistry & Biochemistry Theses & Dissertations
Raman spectroscopy is a form of vibrational spectroscopy that has been increasingly applied to qualitative analysis of chemicals, explosives, pharmaceuticals, and fuels due to its non-invasive and non-destructive nature; its ease of sampling; and its high molecular specificity. These characteristics of Raman spectroscopy also facilitate its use for both in-line and at-line analysis. The principle limitation of Raman spectroscopy is optical interference arising from both analyte and non-analyte fluorescence. In this dissertation, a solution to this problem is presented in the form of a novel spectrometer design which operates in a sequentially shifted excitation mode to eliminate fluorescence backgrounds, fixed …
Patent: Fusion Proteins For Treating Metabolic Disorders,
2013
Novartis Institutes for BioMedical Research
Patent: Fusion Proteins For Treating Metabolic Disorders, Brian R. Boettcher, Shari L. Caplan, Douglas S. Daniels, Norio Hamamatsu, Stuart Licht, Stephen Craig Weldon
Chemistry Faculty Publications
The invention relates to the identification of fusion proteins comprising polypeptide and protein variants of fibroblast growth factor 21 (FGF21) with improved pharmaceutical properties. Also disclosed are methods for treating FGF21 associated disorders, including metabolic conditions.
Use Of Soybean Lecithin In Shape Controlled Synthesis Of Gold Nanoparticles,
2013
Portland State University
Use Of Soybean Lecithin In Shape Controlled Synthesis Of Gold Nanoparticles, Benjamin Robert Ayres
Dissertations and Theses
The work presented in this dissertation is a composite of experiments in the growth of gold nanoparticles with specific optical properties of interest. The goal is to synthesize these gold nanoparticles using soybean extract for not only shape control, but for propensity as a biocompatible delivery system. The optical properties of these nanoparticles has found great application in coloring glass during the Roman empire and, over the centuries, has grown into its own research field in applications of nanoparticulate materials. Many of the current functions include use in biological systems as biosensors and therapeutic applications, thus making biocompatibility a necessity. …
Density Functional Theory And The Calculation Of Tcmg2O4 Spinel Lattice Parameters,
2013
California Polytechnic State University - San Luis Obispo
Density Functional Theory And The Calculation Of Tcmg2O4 Spinel Lattice Parameters, Jon Karlo Macias
Physics
The cohesive energy, lattice constant and bulk modulus of two simple HCP crystal structures of magnesium and technetium were calculated using the vienna ab initio simulation package (VASP) which is based on density functional theory (DFT). The same properties were determined for TcMg2O4 spinel. The theoretical results of the lattice constant of the pure crystals were compared to experimental results and found to be in excellent agreement with a difference of less than 2%. The results for the lattice constant of the TcMg2O4 spinel were found to be in excellent agreement as well with …
Physical Essentials Of Rotating Complex Impedance Diagram In Some Electrochemical Systems,
2013
College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China;
Physical Essentials Of Rotating Complex Impedance Diagram In Some Electrochemical Systems, Bing-Liang Wu
Journal of Electrochemistry
The essential of the rotation of complex impedance diagram in some electrochemical systems is discussed. It is attributing to that the electrochemical capacitance usual is not simple real capacitor but must be complex number capacitance. As the examples: 1, the metal/support electrolyte electrode in the ideal polarization condition, the capacitance must be that of the electrochemical double layer and represents complex number properties. Its complex impedance diagram was not a line parallel to imaginary axis but rotated clockwise α=arctgC"/C'. 2, In the case of insertion/desertion electrodes, the capacitance must be that of the solid electrolyte interphase (SEI). The rotation of …
Combination And Applications Of Time-Resolved Surface Plasmon Resonance Spectroscopy And Electrochemical Methods,
2013
State Key Laboratory of Electroanalytical Chemistry, Engineering Laboratory for Modern A nalytical Techniques, Changchun Institute of A pplied Chemistry, Changchun 130022, China;
Combination And Applications Of Time-Resolved Surface Plasmon Resonance Spectroscopy And Electrochemical Methods, Yu Bao, Yan Mao, Wei Wang, Zheng-Gang Li, Li Niu
Journal of Electrochemistry
Electrochemical-surface plasmon resonance (EC-SPR) technique, developed in recent years, is a new technology which combines time-resolved surface plasmon resonance spectroscopy and electrochemical methods. Surface plasmon resonance (SPR) is a physical phenomenon generated by optical coupling using a metallic thin film and is very sensitive to optical analysis. The principles of SPR and EC-SPR are briefly introduced and the applications of the combination of SPR spectroscopy with electrochemical techniques are reviewed in this paper. This new technology has been widely used in such research areas as reaction dynamics, biochemical sensors, electrode/electrolyte interfaces, kinetic parameters and bimolecular interactions.
High Performance Membrane Electrode Assembly With Low Platinum Loadings Prepared By Atomic Layer Deposition For Pemfc Application,
2013
School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, China;
High Performance Membrane Electrode Assembly With Low Platinum Loadings Prepared By Atomic Layer Deposition For Pemfc Application, Ting Shu, Shi-Jun Liao, Chien-Te Hsieh, Ay Su
Journal of Electrochemistry
A high performance membrane electrode assembly (MEA) with low platinum loadings was successfully prepared with atomic layer deposition (ALD) technique. The anode of the MEA was prepared by depositing platinum on the carbon paper substrate, which was prepared by coating the slurry of carbon black (XC-72R) and Teflon, followed by drying and calcining at 350 °C. The MEAs consisted of the ALD anode or commercial catalyst anode, pretreated Nafion membrane (Nafion-117) and commercial cathode. Performances of MEAs were measured by single cell testing, and the anodes and MEAs were characterized by CV, SEM, TEM and XRD. The results revealed that …
Electrochemical Performance Of Fe3O4/C Composites As Negative Material For Lithium-Ion Batteries,
2013
State Key Laboratory of optoeleetronic Materials and Technologies, Guangdong Province Key Laboratory of Lou-carbon Chemistry & Energy Conservation, School of Physics and Engineering, Sun Yat-sen University,Guangzhou 510275, China
Electrochemical Performance Of Fe3O4/C Composites As Negative Material For Lithium-Ion Batteries, Jun-Jie Cai, Shu Yao, Ze-Sheng Li, Hui Meng, Pei-Kang Shen
Journal of Electrochemistry
The Fe3O4/Carbon composites have been synthesized through coprecipitation pathway and by insitu aniline polymerization as a carbon source. Structural characterization and morphological study of the composites were investigated by using XRD, SEM and TEM techniques. The results showed that the nanosized Fe3O4 particles (40 ~ 80 nm) were encapsulated in the amorphous carbon. During the electrochemical tests, the Fe3O4/C composites exhibited high capaticity and excellent cycle ability, the retention of capaticity was about 1000 mAh·g-1 after 30 cycles of charge/discharge tests at 50 mA·g-1.
