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Articles 21991 - 22020 of 27415

Full-Text Articles in Engineering

An Improved Estimation Of Passive Wrist Stiffness Using Various Techniques, Will Drake, Dr. Steven Charles Jun 2013

An Improved Estimation Of Passive Wrist Stiffness Using Various Techniques, Will Drake, Dr. Steven Charles

Journal of Undergraduate Research

The wrist plays a vital yet frequently overlooked role in positioning and supporting the hand during activities of daily living. Particularly during low-level activities (such as typing), passive joint stiffness dominates wrist dynamics and constitutes the main obstacle to motion. In spite of its importance, however, little consensus exists as to the exact range of passive wrist stiffness. Reported values vary from as little as 0.002 Nm/rad (Lehman & Calhoun, 1991) to as many as 9.0 Nm/rad (Crisco et al, 2010), a span of three orders of magnitude! The purpose of this research is to determine an approximate single-order-of-magnitude range …

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Stand-Alone Lance For Nanoinjection Of Dna, Mark Fernelius, Dr. Larry Howell Jun 2013

Stand-Alone Lance For Nanoinjection Of Dna, Mark Fernelius, Dr. Larry Howell

Journal of Undergraduate Research

Technologies for injecting DNA into egg cells have greatly facilitated genetic research. Microinjection is a current standard for this purpose. It uses a hollow glass needle to inject a solution containing DNA into cells. Although widely used, microinjection has several significant challenges. First, the DNA can be damaged when forced through the small opening of the needle. Second, the cell can die from the physical trauma caused by the microinjection needle piercing the cell membrane. Third, the cell can split open because of the increased internal pressure caused by injecting fluid into the cell. Brigham Young University has developed nanoinjection …

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Measuring Walkability: Development Of An Automated Sidewalk Quality Assessment Tool, Alexandra Frackelton, Alice Grossman, Evangelos Palinginis, Felipe Castrillon, Vetri Elango, Randall Guensler Jun 2013

Measuring Walkability: Development Of An Automated Sidewalk Quality Assessment Tool, Alexandra Frackelton, Alice Grossman, Evangelos Palinginis, Felipe Castrillon, Vetri Elango, Randall Guensler

Suburban Sustainability

Sidewalks are a critical part of sustainable transportation systems, supporting pedestrian travel and healthy physical activity. Presence and quality of sidewalks is a significant predictor of perceived safety and quality of the pedestrian environment. Lack of adequate pedestrian infrastructure data has been identified as a major barrier to large-scale pedestrian planning. Sidewalk presence, width, and surface condition are identified as important indicators of facility quality and accessibility. Georgia Tech is deploying an Android tablet application to automatically generate spatial sidewalk inventories, automatically assess sidewalk quality, and prioritize sidewalk repairs. The research team has collected field data on sidewalk segments across …

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A Study Of Energy Saving Control Strategy For An Integrated Environment Control System Applied To Ship Hull Painting, Tzong-Shing Lee, Li-Wen Chang, Yew-Khoy Chuah Jun 2013

A Study Of Energy Saving Control Strategy For An Integrated Environment Control System Applied To Ship Hull Painting, Tzong-Shing Lee, Li-Wen Chang, Yew-Khoy Chuah

Journal of Marine Science and Technology–Taiwan

An integrated environment control system (IECS) is proposed to satisfy the requirements of IMO (International Maritime Organization) for ship hull painting. The IECS has four elements for environment control, namely, desiccant dehumidification, heating, cooling, and ventilation. Five operating modes are proposed, with each operating mode consists of one to more elements in the IECS system. Energy saving operating mode is selected based on the weather conditions and the conditions of painting work. Energy saving control strategy is applied to each operating mode. Theoretical energy models of the different operation modes are presented, along with the control schemes for the annual …

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The Influence Of Mixture Variables For The Alkali-Activated Slag Concrete On The Properties Of Concrete, Chi-Che Hung, Jiang-Jhy Chang Jun 2013

The Influence Of Mixture Variables For The Alkali-Activated Slag Concrete On The Properties Of Concrete, Chi-Che Hung, Jiang-Jhy Chang

Journal of Marine Science and Technology–Taiwan

In this study, the influence of three mixture variables named Sand/Aggregate ratio, Liquid/Binder ratio and Paste/Aggregate ratio on the concrete properties were studied. The properties of fresh concrete including the slump, air content and unit weight were examined. In addition, the mechanical properties such as the compressive strength, elastic modulus and splitting tensile strength were studied. Results showed that the alkaliactivated slag concrete has superior strength. The 28-day compressive strength can reach 80% of the 90-day compressive strength. In addition, the influence of the Liquid/Binder ratio on the 28-day compressive strength is not as apparent as the water/cement ratio is …

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Numerical Investigation On The Effects Of Wave Grouping On The Motion Of Moored Ddms Platform, Xing-Gang Wang, Zhao-Chen Sun, Shu-Xiu Liang, Si Liu, Shu-Xue Liu, Jun-Bin Luo Jun 2013

Numerical Investigation On The Effects Of Wave Grouping On The Motion Of Moored Ddms Platform, Xing-Gang Wang, Zhao-Chen Sun, Shu-Xiu Liang, Si Liu, Shu-Xue Liu, Jun-Bin Luo

Journal of Marine Science and Technology–Taiwan

The random wave groups with the same wave parameters, such as significant wave height, period and overshoot parameter, but with different wave groupiness are simulated by an empirical wave envelope spectrum involved the group height factor GFH and group length factor GLF based on field measured sea waves. A geometrically nonlinear finite element method based on the total Lagrangian formulation is developed to calculate the mooring-line dynamics. Coupled dynamic analysis of DDMS (Deep Draft Multi-Spar) platform and the attached mooring lines under the action of wave groups with different groupiness in deep water is executed in time domain. The effects …

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The Experimental Study On Local Scour Around A Circular Pipe Undergoing Vortex-Induced Vibration In Steady Flow, Bing Yang, Tao Yang, Jian-Lin Ma, Jin-Sheng Cui Jun 2013

The Experimental Study On Local Scour Around A Circular Pipe Undergoing Vortex-Induced Vibration In Steady Flow, Bing Yang, Tao Yang, Jian-Lin Ma, Jin-Sheng Cui

Journal of Marine Science and Technology–Taiwan

The local scour around a circular pipe undergoing vortexinduced vibration is investigated experimentally in a water flume. The typical characteristic of local scour is analyzed in detail. The influences of initial gap-to-diameter ratio (e0/D), the mode of pipe vibration and the sand type on the local scour are discussed. Experimental results indicate that there exists strong intensity of scour when the pipe moves close to the surface of the sandy bed. The vibration of the pipe results in the rapid development of sandy bed’s scouring. With the increase of gap-to-diameter ratio the distance between the center of the pipe and …

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Shape Optimization Of Multi-Chamber Side Inlet/Outlet Mufflers Hybridized With Multiple Perforated Intruding Tubes Using A Genetic Algorithm, Min-Chie Chiu, Ying-Chun Chang Jun 2013

Shape Optimization Of Multi-Chamber Side Inlet/Outlet Mufflers Hybridized With Multiple Perforated Intruding Tubes Using A Genetic Algorithm, Min-Chie Chiu, Ying-Chun Chang

Journal of Marine Science and Technology–Taiwan

The use of perforated-tube side mufflers for depressing venting noise within a constrained space has been prevalent in modern industries. Also, research on mufflers equipped with side inlets/outlets has been thoroughly documented. However, research on shape optimization of side inlet/outlet mufflers hybridized with multiple open-ended perforated intruding tubes which may enhance acoustic performance has gone unnoticed. Therefore, we wish to not only analyze the sound transmission loss (STL) of side inlet/outlet mufflers but also to optimize their best design shape within a limited space. In this paper, the generalized decoupling technique and the plane wave theory used in solving the …

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Design And Realization Of A Hybrid Intelligent Controller For A Twin Rotor Mimo System, Jih-Gau Juang, Kai-Ti Tu Jun 2013

Design And Realization Of A Hybrid Intelligent Controller For A Twin Rotor Mimo System, Jih-Gau Juang, Kai-Ti Tu

Journal of Marine Science and Technology–Taiwan

An intelligent control scheme using a fuzzy switching mechanism, grey prediction and genetic algorithm (GA) is applied to a coupled nonlinear system, called a twin rotor multi-input multi-output system (TRMS). In real-time control, a Xilinx Spartan II SP200 FPGA (Field Programmable Gate Array) is employed to construct a hardware-in-the-loop system through writing VHDL on this FPGA. The objective is to stabilize the TRMS in significant cross-coupled conditions, and to experiment with setpoint control and trajectory tracking. The proposed scheme improves the performance of the PID controller. Control gains and parameters of the fuzzy switching mechanism are obtained by GA. Simulation …

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A Comparison Of Great Circle, Great Ellipse, And Geodesic Sailing, Wei-Kuo Tseng, Jiunn-Liang Guo, Chung-Ping Liu Jun 2013

A Comparison Of Great Circle, Great Ellipse, And Geodesic Sailing, Wei-Kuo Tseng, Jiunn-Liang Guo, Chung-Ping Liu

Journal of Marine Science and Technology–Taiwan

An analytical and numerical comparison of great circle (GC) sailing, great elliptic (GE) sailing, and geodesic (Geod) sailing is presented. The comparison between GC and GE sailing addresses some problems whether the navigator and navigational software developers promptly have to use GE sailing or use hybrid sailing mixed with features of the GC sailing and GE sailing. This fact found here presents that the formulae tackling relationship of latitude and longitude of GC sailing also can be suited to the GE sailing except some calculation of GE sailing involving distance and course. The validity of effectiveness of proposed GE sailing …

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The Variation Of Flexural Rigidity For Post-Tensioned Prestressed Concrete Beams, Ta-Heng Wang, Ran Huang, Tz-Wei Wang Jun 2013

The Variation Of Flexural Rigidity For Post-Tensioned Prestressed Concrete Beams, Ta-Heng Wang, Ran Huang, Tz-Wei Wang

Journal of Marine Science and Technology–Taiwan

The natural frequency of axial-loaded concrete beam decreases with increasing applied compressive force, and the natural frequency of tensioned cable increases with increasing tensile force. However, the variation of natural frequency of prestressed concrete beam (PCB) consisting of concrete and cable has rarely been discussed based on both |the rigorous mathematic model and experimental results. In this study, a testing program was conducted and Rayleigh's method was used to derive an approximate equation for computing natural frequency. The results indicate that (1) the natural frequency decreases with increasing prestressing force for PCB with eccentric parabolic tendon, but it is no …

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A Piston-Type Porous Wave Energy Converter Theory, Ching-Yun Yueh, Shih-Hsuan Chuang Jun 2013

A Piston-Type Porous Wave Energy Converter Theory, Ching-Yun Yueh, Shih-Hsuan Chuang

Journal of Marine Science and Technology–Taiwan

This study investigates the performance of a piston-type porous wave energy converter (PTPWEC), which consists of a solid wall, a vertical porous plate, a transmission bar, a rigid block constrained by rollers, a spring, and a damper. The PTPWEC is subjected to dynamic external loading by wave actions. To simulate this dynamic system, a mathematical model is used with a single-degree-of-freedom (SDOF) system. Linear wave theory governs the entire fluid domain, which is divided into two regions by the vertical porous plate. Darcy's law is applied to flow through the porous plate. Finally, this investigation employs an eigenfunction expansion to …

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Application Of A Support Vector Machine For Liquefaction Assessment, Ching-Yinn Lee, Shuh-Gi Chern Jun 2013

Application Of A Support Vector Machine For Liquefaction Assessment, Ching-Yinn Lee, Shuh-Gi Chern

Journal of Marine Science and Technology–Taiwan

This study presents a support vector machine (SVM)-based approach for predicting earthquake liquefaction. The SVM model database includes five indexes: earthquake magnitude, total overburden pressure, effective overburden pressure, qc values from cone penetration tests (CPT), and peak ground acceleration. The proposed model was trained and tested on a dataset comprising 466 field liquefaction performance records and CPT measurements. A grid search method with k-fold cross-validation was also used to verify the feasibility. Compared with an artificial neural network (ANN)–based method, the SVM-based method has the advantage of increased accuracy and simpler operation. Experimental results show that the proposed SVM approach …

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Design Optimization Of A Submerged Vane With Streamlined Profile For Sediment Management In Rivers, Huei-Tau Ouyang, Jihn-Sung Lai Jun 2013

Design Optimization Of A Submerged Vane With Streamlined Profile For Sediment Management In Rivers, Huei-Tau Ouyang, Jihn-Sung Lai

Journal of Marine Science and Technology–Taiwan

The design of the submerged vane, a flow training structure for sediment management in rivers, is optimized using a Genetic Algorithm. The vane considered in this study has a foil-like sectional profile and a tapered outline. The sectional profile of the vane is based on two types of shape formulations: (1) NACA’s four-digit wing profiles, and (2) profiles comprising two Bezier splines. By using Elitist and Crowding factor models, the optimization proceeds by creating successively improved generations of vanes. The final design for the vane with NACA profile has higher lift yet larger drag. Conversely, the final design for the …

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The Effects Of A Collaborative Problem-Based Learning Experience On Students’ Motivation In Engineering Capstone Courses, Brett D. Jones, Cory M. Epler, Parastou Mokri, Lauren H. Bryant, Marie C. Paretti May 2013

The Effects Of A Collaborative Problem-Based Learning Experience On Students’ Motivation In Engineering Capstone Courses, Brett D. Jones, Cory M. Epler, Parastou Mokri, Lauren H. Bryant, Marie C. Paretti

Interdisciplinary Journal of Problem-Based Learning

We identified and examined how the instructional elements of problem-based learning capstone engineering courses affected students’ motivation to engage in the courses. We employed a two-phase, sequential, explanatory, mixed methods research design. For the quantitative phase, 47 undergraduate students at a large public university completed a questionnaire that measured the components of the MUSIC Model of Academic Motivation (Jones, 2009): empowerment, usefulness, success, situational interest, individual interest, academic caring, and personal caring. For the qualitative phase that followed, 10 students answered questions related to the MUSIC components. We identified several instructional elements that led to motivating opportunities that affected students’ …

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Section Abstracts: Biomedical And General Engineering May 2013

Section Abstracts: Biomedical And General Engineering

Virginia Journal of Science

Abstracts of the Biomedical and General Engineering Section for the 91st Annual Virginia Journal of Science Meeting, May 2013

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Section Abstracts: Aeronautical And Aerospace Sciences May 2013

Section Abstracts: Aeronautical And Aerospace Sciences

Virginia Journal of Science

Abstracts of the Aeronautical and Aerospace Sciences Section for the 91st Annual Virginia Journal of Science Meeting, May 2013

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Cooking Up The Optimal Baking Algorithm, Tony Burand, Michael Tetzlaff, Jacob Smith May 2013

Cooking Up The Optimal Baking Algorithm, Tony Burand, Michael Tetzlaff, Jacob Smith

Colloquy Undergraduate Research Journal

Many conventional rectangular baking pans have a problem in that they bake the corners of the batter faster than the rest of the pan. Circular baking pans eliminate this problem, but take up more space in the oven. We propose a solution that given weights for baking consistency and space efficiency based on the importance of each will provide the optimal baking pan shape. We have come up with an algorithm for sorting the pans of area A effectively and formed a model that describes the heat flow into the pan as well as the baking mix itself. The model …

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Deutsche Luftshiffahrts-Aktiengesellschaft: Rediscovering The World’S First Airline, Michael Sloan May 2013

Deutsche Luftshiffahrts-Aktiengesellschaft: Rediscovering The World’S First Airline, Michael Sloan

Bridgewater Review

No abstract provided.

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Bs News May/June May 2013

Bs News May/June

Building Services Engineering

No abstract provided.

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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 Apr 2013

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 …

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An Electrochemical Impedance Spectroscopic Study Of Cuf2/Moo3/C Cathode Composites, Yue-Li Shi, Nan Wu, Ming-Fang Shen, Jia-Qun Dong, Quang-Chao Zhuang, Li Jiang Apr 2013

An Electrochemical Impedance Spectroscopic Study Of Cuf2/Moo3/C Cathode Composites, Yue-Li Shi, Nan Wu, Ming-Fang Shen, Jia-Qun Dong, Quang-Chao Zhuang, Li Jiang

Journal of Electrochemistry

Composite electrode of CuF2/MoO3/C was fabricated through high energy mechanical milling. The properties of CuF2/MoO3/C were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), high resolution transmission electron microscopy (TEM), galvanostatic charge-discharge measurements, cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The results showed that the grain sizes of CuF2 and MoO3 after milling were 200 ~ 300 nm, and the initial discharge capacity of CuF2/MoO3/C was 647 mAh·g-1 at room temperature and at a current density of 10 mA·g-1. However, the …

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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 Apr 2013

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 …

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Hydrothermal Synthesis Of Pure Li4Ti5O12 And Its Electrochemical Performance, Wen-Jun Xie, Yu-Shi He, Hong Wang, Xiao-Zhen Liao, Zi-Feng Ma Apr 2013

Hydrothermal Synthesis Of Pure Li4Ti5O12 And Its Electrochemical Performance, Wen-Jun Xie, Yu-Shi He, Hong Wang, Xiao-Zhen Liao, Zi-Feng Ma

Journal of Electrochemistry

Spinel Li4Ti5O12 was prepared by hydrothermal method using commercial anatase (TiO2) and lithium hydroxide (LiOH) as raw materials. The effects of the LiOH concentration of lithium hydroxide, hydrothermal reaction time and calcination temperature on the structure and electrochemical performance of Li4Ti5O12 were investigated. The formation process of Li4Ti5O12 was also proposed. The micro-structure and morphology wereas characterized by XRD, SEM, TEM techniques, and the electrochemical performance was analyzed by galvanostatic charge-discharge test. The results show that the pure phase spinel Li4Ti …

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Preparation And Catalytic Properties Of Feco Alloy Nanocatalyst, Ming-Xuan Li, Jie-Lian Ou, Sheng-Pei Chen, Peng Wang, Bin-Bin Xu, Shi-Gang Sun Apr 2013

Preparation And Catalytic Properties Of Feco Alloy Nanocatalyst, Ming-Xuan Li, Jie-Lian Ou, Sheng-Pei Chen, Peng Wang, Bin-Bin Xu, Shi-Gang Sun

Journal of Electrochemistry

The FeCo alloy nanoparticles were electrodeposited on glassy carbon electrode by chronoamperometry and were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The results showed that the shapes of FeCo nanoparticles were cubes with an average size of 65 nm. The atom ratio of Fe and Co is 1:1. As indicated from the pattern of selected area electron diffraction (SAED), the FeCo cubic nanoparticles were single crystal which belonged to body-centered cubic with an interval of 0.201 nm referring to the (110) facets of FeCo alloy. The FeCo cubic nanoparticles exhibited the enhanced electrocatalytic …

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Electrochemical Performance Of Lifepo4/C Synthesized Via Aqueous Solution-Evaporation Route, Ning-Yu Gu, Xing-Hua He, Yang Li Apr 2013

Electrochemical Performance Of Lifepo4/C Synthesized Via Aqueous Solution-Evaporation Route, Ning-Yu Gu, Xing-Hua He, Yang Li

Journal of Electrochemistry

The LiFePO4/C samples have been synthesized via an aqueous solution-evaporation route with LiH2PO4, FeC2O4.2H2O as raw materials and citric acid as a carbon source. X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM) were used to analyze structure and morphology of the samples. The electrochemical performances of the LiFePO4/C cathodes were characterized by charge/discharge cures and electrochemical impedance spectroscopy (EIS). The results show that the LiFePO4/C sample, calcined at 700 °C and contained 3.03% (by mass) carbon, exhibited a highly pure …

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Preparation And Methanol Electrooxidation Of Pt/Pmo12/Pedot/Gc Electrodes, Jing-Hua Ma, Rui-Xiang Wang, Yi-Liang Tan, Shan-Shan Wang, Yan-Qin Zhang, You-Jun Fan Apr 2013

Preparation And Methanol Electrooxidation Of Pt/Pmo12/Pedot/Gc Electrodes, Jing-Hua Ma, Rui-Xiang Wang, Yi-Liang Tan, Shan-Shan Wang, Yan-Qin Zhang, You-Jun Fan

Journal of Electrochemistry

Modification of phosphomolybdic acid (PMo12) on poly(3,4-ethylenedioxythiophene) (PEDOT) film (PEDOT/GC) obtained through the electrochemical polymerization was performed using adsorption method (PMo12/PEDOT/GC), followed by electrodepositing Pt on PMo12/PEDOT/GC to prepare Pt/PMo12/PEDOT/GC electrode. Effects of PMo12 and PEDOT on the methanol oxidation performance of electrode were investigated. Results showed that PMo12 obviously changed the morphology and structure of Pt loaded on the electrode, leading to the formation of sharp thorns at the edge of Pt nanostructures. Cyclic voltammetry and chronoamperometry data demonstrated that the catalytic activities of methanol electrooxidation on the Pt/PMo …

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Synthesis And Electrochemical Performance Of Si/C Composite Modified By Pani, Guang-Hui Zhang, Pei-Kang Shen, Ge Sang, Ren-Jin Xiong Apr 2013

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.

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Synthesis Of Lifepo4/C Cathode By Sol-Gel And Calcining Method With Chitosan Monomer, Jia Xu, Yan-Yan Wang, Rui Wang, Bo Wang, Yue Pan, Dian-Xue Cao, Gui-Ling Wang Apr 2013

Synthesis Of Lifepo4/C Cathode By Sol-Gel And Calcining Method With Chitosan Monomer, Jia Xu, Yan-Yan Wang, Rui Wang, Bo Wang, Yue Pan, Dian-Xue Cao, Gui-Ling Wang

Journal of Electrochemistry

The LiFePO4/C cathode materials for Li-ion battery were synthesized by sol-gel and calcining method using chitosan monomer as a carbon source and a gelating agent. The structures and morphologies were characterized by X-ray diffraction spectroscopy (XRD) and scanning electron microscopy (SEM). The electrochemical performance was investigated by the galvanostatic charge–discharge test. When the molar ratios between chitosan monomer and LiFePO4 were 1:1.2, the LiFePO4/C cathode calcined at 600 oC showed the best performance. The particle sizes ranged 200 ～ 400 nm. The initial discharge capacity of 155 mAh·g-1 was achieved at room temperature …

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Current Development Of Quantum Dots Based Electrochemiluminescence Immunosensors, Ling-Ling Li, Qian Lu, Jun-Jie Zhu Apr 2013

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.

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