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2006

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A Case Study Of Inter-Arrival Time Distributions Of Container Ships, Tu-Cheng Kuo, Wen-Chih Huang, Sheng-Chieh Wu, Pei-Lun Cheng Dec 2006

A Case Study Of Inter-Arrival Time Distributions Of Container Ships, Tu-Cheng Kuo, Wen-Chih Huang, Sheng-Chieh Wu, Pei-Lun Cheng

Journal of Marine Science and Technology

Given the recent prevalence of periodical container liners, the applicability of related models of widely applied queuing theory is left in doubt. Since they focus on marine liners, the distribution pattern is always considered to be a deterministic distribution for periodical schedule. In order to investigate the distribution patterns of container liners, observation units are segmented into single shipping liners, single berths, single container terminals and entire ports. The evolution of the ship arrival distribution pattern and the goodness-of-fit test for observation are based on the ship dynamic data of international harbors in Taiwan. This study aims to implement tests …

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Particle Swarm Optimization For Global Optimization Problems, Hsin-Chuan Kuo, Jiang-Ren Chang, Ching-Hsiang Liu Dec 2006

Particle Swarm Optimization For Global Optimization Problems, Hsin-Chuan Kuo, Jiang-Ren Chang, Ching-Hsiang Liu

Journal of Marine Science and Technology

In this paper, the particle swarm optimization (PSO), originated as a simulation of a simplified social system with swarm intelligence and having exploring and exploiting characteristics of the particle swarm, is adopted to deal with the global optimization problems. To begin with, four non-linear two-dimensional functions are adopted as benchmark examples for determining the suitable ranges of parameters in the PSO. It is found that uses of the PSO can make the search quickly converge to the global optimum. Then, several benchmark functions below ten-dimensions are adopted especially for comparisons of search efficiency on the PSO and other algorithms. Results …

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Functional Model Of Cost And Time For Highway Construction Projects, Jin-Fang Shr, Wei-Tong Chen Dec 2006

Functional Model Of Cost And Time For Highway Construction Projects, Jin-Fang Shr, Wei-Tong Chen

Journal of Marine Science and Technology

It is commonly accepted that construction cost, time and quality performance has been regarded as the major success factors for a construction project. With the increasing use of innovative contracts in highway construction, the relationship between construction cost and time has become more crucial than ever. Improved control of time value has become necessary, for quantifying the functional relationship between construction cost and time. This study explores the functional relationship between highway construction cost and time. Data from projects of the Florida Department of Transportation (FDOT) in the US is utilized to develop and illustrate the quantifying model. The proposed …

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Emergence Of Attached Recirculating Eddy For Flow Around A Circular Cylinder Asymmetrically Placed In A Channel, Tsung-Chan Hsieh, Jiahn-Horng Chen Dec 2006

Emergence Of Attached Recirculating Eddy For Flow Around A Circular Cylinder Asymmetrically Placed In A Channel, Tsung-Chan Hsieh, Jiahn-Horng Chen

Journal of Marine Science and Technology

This study discusses the emergence and development of cylinder-attached recirculating regions appearing in a fully developed flow past a circular cylinder asymmetrically confined between two infinite parallel plates. We employed a finite-volume method with the SIMPLE algorithm to compute the flow fields for various sizes and asymmetrical settings of circular cylinders. Two geometrical parameters, the blockage and asymmetry coefficients, are varied in computations. A series of computations show that the flow evolves a single asymmetrical recirculating region for the Reynolds number beyond some critical value. Its development in length bears a linear relation to the Reynolds number. Its growth rate …

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Web Services Of Mms Applications On Mobile Devices, Cheng-Chih Yang, Cheng-Min Lin Dec 2006

Web Services Of Mms Applications On Mobile Devices, Cheng-Chih Yang, Cheng-Min Lin

Journal of Marine Science and Technology

This study develops the Web services that are applied in Multimedia Message Service (MMS) applications via the Internet and operated by mobile portable devices, such as Personal Digital Assistant (PDA) and cellular phone. First, a MMS system environment and architecture is modeled. Next, the operations and interface of the MMS system is defined by the Web Services Description Language (WSDL) to represent the web services on MMS application system. Finally, two system prototypes are described in this study that includes distance video cam monitor system and GPRS cellular phone MMS sender.

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Minerva 2006, The Honors College Dec 2006

Minerva 2006, The Honors College

Minerva

This issue of Minerva includes an article on the course "Honors for All Ages," an Honors course offered at Penobscot Valley Senior College; an interview with notable Honors alum, Bernard Lown; and a celebration of the life of former Honors Program Director, Ulrich Wicks.

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Bs News Dec 2006

Bs News

Building Services Engineering

No abstract provided.

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Development Of Flame Retardant Polyphosphoric Acid Coating Based On The Polyelectrolyte Multilayers Technique, K Srikulkit, C Iamsamai, S T. Dubas Dec 2006

Development Of Flame Retardant Polyphosphoric Acid Coating Based On The Polyelectrolyte Multilayers Technique, K Srikulkit, C Iamsamai, S T. Dubas

Journal of Metals, Materials and Minerals

Polyelectrolyte multilayer (PEM) thin films were deposited on silk by sequential deposition of Chitosan and polyphosphoric acid. This PEM composition takes advantage of synergetic effect of the phosphorus and the nitrogen to provide an efficient coating, which prevents fiber decomposition at high temperature. Prior to the PEM assembly on silk fibers, the growth of the film was initially monitored using an atomic force microscopy (AFM). Films formed on silicon wafer after 10, 20, 30, 40 and 60 layers showed somewhat linear increase, which is consistent with the PEM technique. A total thickness ranging from 10 to 107 nm for the …

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Uv Radiation Energy Consumption In Curing Process Of Epoxidized Sunflower Oil-Organoclay Hybrid Coatings, N Jiratumnukul, R Intarat Dec 2006

Uv Radiation Energy Consumption In Curing Process Of Epoxidized Sunflower Oil-Organoclay Hybrid Coatings, N Jiratumnukul, R Intarat

Journal of Metals, Materials and Minerals

Epoxidized sunflower oil (ESO) can be cured with ultraviolet radiation using either cationic or hybrid initiation. The organoclay was prepared by the cationic exchange process, in which sodium ions were replaced by alkyl ammonium ions. Organoclay was incorporated into epoxidized sunflower oil UVcurable systems. The effects of diluents and types of photo initiators were studied. It was found that the formulations with a hybrid photoinitiator required less energy in the curing process than those with a cationic photoinitator. Moreover, the formulations without diluent can be cured with lower radiation energy than those with diluent.

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Ph Dependant Coating For Microfluidics Devices, L Limsavarn, C Panithipongwut, P Thongkorn, S T. Dubas Dec 2006

Ph Dependant Coating For Microfluidics Devices, L Limsavarn, C Panithipongwut, P Thongkorn, S T. Dubas

Journal of Metals, Materials and Minerals

The layer-by-layer technique was used to coat the channels of PDMS microfluidics devices. The coating was based on the sequential deposition of polydiallyldimethylammonium chloride (PDADMAC) with a copolymer of polystyrene sulfonate and maleic acid (CoPSS-Maleic) into polyelectrolyte multilayer (PEM). The possible deposition of PEM coating on PDMS was confirm by contact angle which showed the clear transformation of the PDMS surface from hydrophobic to hydrophilic. The later deposition of the PEM coating inside the micro-channels was confirmed by change in electroosmotic flow direction (EOF) and intensity as a function of the number of deposited layers. The EOF measurements revealed that …

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Techniques To Improve Coating Adhesion Of Superhard Coatings, N Panich, P Wangyao, N Vattanaprateep, S Yong Dec 2006

Techniques To Improve Coating Adhesion Of Superhard Coatings, N Panich, P Wangyao, N Vattanaprateep, S Yong

Journal of Metals, Materials and Minerals

This work addresses the development of different techniques in fabricating TiB2 coatings with increased adhesion to the substrate and with retained high hardness. Titanium diboride (TiB2) coatings were deposited on high-speed steel substrates by magnetron sputtering of a TiB2 target. Attempts to enhance the coating adhesion to the substrate of the TiB2 coatings by controlling the deposition conditions and parameters are presented, such as effect of substrate rotation; annealing temperature; using deposited Cr as an interlayer material and Ti/TiB2 multilayer system. The structure of the coatings was examined by X-ray diffraction, field-emission scanning electron microscopy, and atomic force microscopy. The …

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Electrochemical Oxidation Process For Mineralization Of Solvent, A Charoensri, F Kobayashi, A Kimura, J Ishii Dec 2006

Electrochemical Oxidation Process For Mineralization Of Solvent, A Charoensri, F Kobayashi, A Kimura, J Ishii

Journal of Metals, Materials and Minerals

A silver mediated electrochemical oxidations is a promising technique for the destruction of organic compounds. The destruction of 30%tributyl phosphate in dodecane in a nitric acid medium containing electrogenerated Ag(II) to carbon dioxide was studied by using a laboratory scale electrochemical oxidation cell. The electrolyte used in this system was 0.5 M AgNO3 in the range of 3 - 7 M HNO3, at operating temperatures of 60ºC ± 5ºC, under ultrasonic agitation and the output of a DC power supply at constant the current was 60 A, respectively. Electrolysis was carried out for 5 hours. The results show that, in …

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Reheat Treated Microstructures And Gamma Prime Particle Coarsening Behaviour At 900˚C Of Cast Nickel Based Superalloy In-738, S Polsilapa, P Sopon, N Panich, N Chuankrerkkul, A Thueploy Dec 2006

Reheat Treated Microstructures And Gamma Prime Particle Coarsening Behaviour At 900˚C Of Cast Nickel Based Superalloy In-738, S Polsilapa, P Sopon, N Panich, N Chuankrerkkul, A Thueploy

Journal of Metals, Materials and Minerals

Long-term isothermal exposure tests were conducted on IN-738 alloy to evaluate the variation of gamma prime particle coarsening behavior after different rejuvenated heat treatment conditions. The longterm thermal exposure tests (up to 2,500 hours) were conducted at 900˚C to assess gamma prime particle coarsening behavior. Metallographic work had been performed on isothermally aged samples to characterize gamma prime coarsening as a function of heating time. At all investigated heating times, the gamma prime particles in all tested specimens were coarser than the initial reheat treated ones. The gamma prime particles appeared to coarsen more into a round shape or agglomerated …

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Effect Of Decarburization On Microstructure Of Dc-Plasma Nitrided H 13 Tool Steel, P Visuttipitukul, C Paa-Rai, K Hideyuki Dec 2006

Effect Of Decarburization On Microstructure Of Dc-Plasma Nitrided H 13 Tool Steel, P Visuttipitukul, C Paa-Rai, K Hideyuki

Journal of Metals, Materials and Minerals

Decarburization may occur during heat treatment of H13 steel resulting in carbon deficiency near the specimen surface. Microstructures and properties of H13 tool steel after surface treatment such as plasma nitriding can be affected by decarburization. This study is focused on the microstructure of plasma nitrided H13 steel. Decarburized and non-decarburized H13 steel was plasma nitrided for 36-72 ks at temperatures varying from 773 to 823 K. The microstructure of the plasma nitrided layer was analyzed by an optical microscope and Electron Probe Micro Analysis (EPMA). The thickness of the nitriding layer is measured. The microstructures of the decarburized and …

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The Influence Of The Strain Rate On The Material Properties Of The Zinc-Coated Sheet, Z Vadasová, M Mihaliková Dec 2006

The Influence Of The Strain Rate On The Material Properties Of The Zinc-Coated Sheet, Z Vadasová, M Mihaliková

Journal of Metals, Materials and Minerals

In this paper the influence of the strain rate on the material properties of the zinc-coated sheet of the thickness (1; 1.5; 1.8) mm made from low-alloyed steel ZINKODUR 340 was analyzed. Increasing the strain rate is one of the possible ways to increase cold mechanical work in products. The tensile test is the most useful method for determining the material characteristic such as ductility. This contribution analyzes the influence of loading rate in range from 1 to 1000mm/min on material characteristics of tested steel during the tensile test. Strain rate is one of the most significant factors, which affected …

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The Effect Of Long-Term Thermal Exposure At Elevated Temperatures On Microstructures And Mechanical Properties In Centrifugally Casted Iron-Base Alloy, G Lothongkum, N Thaweepornkhasemsukh, P Wangyao Dec 2006

The Effect Of Long-Term Thermal Exposure At Elevated Temperatures On Microstructures And Mechanical Properties In Centrifugally Casted Iron-Base Alloy, G Lothongkum, N Thaweepornkhasemsukh, P Wangyao

Journal of Metals, Materials and Minerals

This work has an aim to study and investigate the relationship between high temperature exposure conditions on microstructural evolution and mechanical properties in the iron-based alloy, Fe-30.8 Ni - 26.6 Cr alloy, strengthened by carbide precipitation. Two exposure temperatures (900 and 1000°C) with various thermal exposure times are introduced to the as-received alloy. After short-term exposure, it was found that the secondary carbides precipitated early near the primary carbides, which were chromium and niobium/titanium carbide networks. The secondary carbide precipitations were also found in the dendrite cores. The amounts of needle-like carbides and secondary carbide films increased with time and …

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Transparent Coating Materials Based On Inorganic/Organic Composites, K Srikulkit, N Rojtinnakorn, R Charoensak Dec 2006

Transparent Coating Materials Based On Inorganic/Organic Composites, K Srikulkit, N Rojtinnakorn, R Charoensak

Journal of Metals, Materials and Minerals

A siloxyl group functionalized copolymer of low molecular weight was synthesized, aiming at preparing transparent inorganic/organic coating composites. Two types of coating systems were investigated: two-component system (based on functionalized copolymer-HMMM) a three-component system (based on functionalized copolymer-HMMM-TEOS). Their properties were investigated and compared. Coating films obtained from these systems exhibited good optical clarity, which was largely dependent on the content of indicated Materials. For instance, to prevent phase separation in the 3- component system, TEOS was "effectively" linked to pendent siloxyl groups on the organic moiety Hence, coating formulations containing a high degree of pendent siloxyl groups exhibited better …

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Reaction Mechanism Of V(Ⅳ)/V(Ⅴ) Redox Couple At Graphite Felt Composite Electrode Bonded With Conductive Carbon Plastic, Xiao-Gang Li, Ke-Long Huang, Liusu-Qin Liusu-Qin, Ning Tan, Li-Quan Chen Nov 2006

Reaction Mechanism Of V(Ⅳ)/V(Ⅴ) Redox Couple At Graphite Felt Composite Electrode Bonded With Conductive Carbon Plastic, Xiao-Gang Li, Ke-Long Huang, Liusu-Qin Liusu-Qin, Ning Tan, Li-Quan Chen

Journal of Electrochemistry

The rate-determining step of V(Ⅳ) /V(Ⅴ) redoxreaction was investigated at graphite felt(GF)composite electrode by various techniques: cyclic voltammetry,polarization curve and impedance spectroscopy.Cyclic voltammetry analysis indicated that V(Ⅳ) /V(Ⅴ) redox reaction at GF electrode is quasi reversible.Acertain chemical reaction step is suspected to follow the electron transfer step of this reaction.The Tafel slopevalue(0.124) obtained from the polarization curve agrees well with theoretical value(0.12),which supposingthe electron transfer step was the rate-determining step.Impedance Spectroscopies at various potentials werestudied and simulated by equivalentcircuits.The impedance value of the electron transfer step modified is greatlyhigher than the others,which shows that the electron transfer step is the …

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Electrochemical Characterization Of Positive Electrode Material Lini_(1/3)Co_(1/3)Mn_(1/3)O_2 In Different Electrolytes, Jing-Jing Liu, Wei-Hua Qiu, Ling-Yan Yu, Hai-Lei Zhao, Tao Li Nov 2006

Electrochemical Characterization Of Positive Electrode Material Lini_(1/3)Co_(1/3)Mn_(1/3)O_2 In Different Electrolytes, Jing-Jing Liu, Wei-Hua Qiu, Ling-Yan Yu, Hai-Lei Zhao, Tao Li

Journal of Electrochemistry

Cathode materials LiNi_(1/3)Co_(1/3)Mn_(1/3)O_(2) were prepared by low-heating solid-state reaction.The micro-structure and morphology of as-synthesized materials have been investigated by using XRD and SEM.The compatibilities of LiNi_(1/3)Co_(1/3)Mn_(1/3)O_(2) with purchased LiPF_(6)/ EC+DMC+DEC electrolyte and prepared LiBOB/EC+DEC+EMC electrolyte have also been studied.The Li/LiNi_(1/3)Co_(1/3)Mn_(1/3)O_(2) batteries showed excellent electrochemical properties in the LiPF_(6)/ EC+DMC+DEC electrolyte.Reversible discharge capacities of 167、163、163、157、147mAh/g at 0.5C、1C、1.5C、2C、3C rate between 2.7~4.35 V,with stable cycling performances have been obtained.Comparatively,the specific capacity of 160 mAh/g at 0.5C was obtained in LiBOB/EC+DEC+DEC electrolyte,which was just a little lower than that in the other electrolyte.However,the high rate capability of the materials in LiBOB/EC+DEC+DEC was not as …

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The Synthesis,Structure And Electrochemical Performances Of Lithium Iron Phosphate, Hui Xie Nov 2006

The Synthesis,Structure And Electrochemical Performances Of Lithium Iron Phosphate, Hui Xie

Journal of Electrochemistry

The lithium iron phosphate cathode materials were synthesized by solid-state reaction combined high-rate ball milling under the temperature ranging from 400 ℃ to 700 ℃.The crystalline structure,morphology of particles,and electrochemical performance of the sample were investigated by X-ray diffraction,scanning electron microscopy and charge-discharge test.The results showed that the sintering temperature had great influences on the crystal structure,morphology and electrochemical performances of LiFePO_(4).The sample synthesized under 600℃ showed the best charge-discharge performances with the first specific discharge capacity of(128.8) mAh/g and the 15~(th) specific discharge capacity of 129.1 mAh/g at 0.1C rate,each charge-discharge cycling efficiency being 99.7%.Also the sample showed good …

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Synthesis Of Monolithic Carbon/Nickel Oxide Composite Electrode Material And Cyclic Voltammetry Characteristics, Tian-Ying Guo, Jing-Wei Zhu, Mou-Dao Song, Bang-Hua Zhang Nov 2006

Synthesis Of Monolithic Carbon/Nickel Oxide Composite Electrode Material And Cyclic Voltammetry Characteristics, Tian-Ying Guo, Jing-Wei Zhu, Mou-Dao Song, Bang-Hua Zhang

Journal of Electrochemistry

Monolithic carbon/nickel oxide composite materials were synthesized by carbonization of phenol formaldehyde gels that were ion-exchanged with Ni~(2+).Atomic absorption spectroscopy and powder X-ray diffraction technique were used to characterize the chemical composition and physical structure of the materials.The nickel dope amount for this method can reach 5.9 %(by mass).Subsequent cyclic voltammetry experiments indicate that the materials exhibit best capacitive performance at the nickel content of 4.4 %.

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Deep Treatment Of Pulping Wastewater Using Three Phase Fluidized Bed Electrode Reactor, Dan Wu Nov 2006

Deep Treatment Of Pulping Wastewater Using Three Phase Fluidized Bed Electrode Reactor, Dan Wu

Journal of Electrochemistry

Treatment of pulping wastewater by using a novel electrochemical reactor,i.e.the three phase fluidized bed electrode,reactor were invesigated.The effects of air flow rate,applied voltage,pH value and FeSO_(4) concentration on electrolysis efficiency were investigated.It was clearly shown that the 20 V of voltage,0.3 m~(3) h~(-1) of air flow rate,1000 mg L~(-1) of FeSO_(4) concentration and pH≈2.5 were its best conditions.COD removal could be 70.1% under these conditions.

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Electrochemical Behavior Of Buprofezin On Glass-Carbon Electrode, Qi Wang, Chang-Guo Chen Nov 2006

Electrochemical Behavior Of Buprofezin On Glass-Carbon Electrode, Qi Wang, Chang-Guo Chen

Journal of Electrochemistry

Electrochemical behavior of Bup has been investigated by means of cyclic voltammetry,linear sweep voltammetry,differential pulse voltammetry and square wave voltammetry.The results indicate that the electrochemical behavior of Bup on the surface of glassy carbon electrode is corresponding to a irreversible two-protons and two-electrons process with absrption.The square wave voltammetry for determination of Bup in actual samples has been established.

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Facilitated Effect Of Ag To Oxygen Transportation In Pem Fuel Cell Air Cathodes, Hong-Feng Xu, Jian-Hua Dong, Xiang-Li Hou Nov 2006

Facilitated Effect Of Ag To Oxygen Transportation In Pem Fuel Cell Air Cathodes, Hong-Feng Xu, Jian-Hua Dong, Xiang-Li Hou

Journal of Electrochemistry

Silver(Ag) was deposited in the pores of Nafion membrane by ion exchange and succedent hydrogen reduction;the structures of Nafion-Ag membrane were measured by TEM and XRD,the diffusion coefficients of oxygen in Nafion-Ag was determined by electrochemical limited current method.The results showed that after deposited silver,the pores in the Nafion were enlarged by silver grains;the oxygen diffusion coefficient was increased about four times.By introducing silver in the thin Nafion film around the cathode catalyst,the performance of PEM fuel cell have a evident increasing in high current density, which shows the facilitated effects of silver to oxygen transportation in PEM fuel cell.

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Structure And Electrochemical Characteristics Of Lifepo_4 Prepared By The Polyacrylates-Pyrolysis-Reduction Method For Li-Ion Batteries, Li-Hong Yu, Yu-Liang Cao, Xiao-Fei Zhang, Han-Xi Yang, Xin-Ping Ai Nov 2006

Structure And Electrochemical Characteristics Of Lifepo_4 Prepared By The Polyacrylates-Pyrolysis-Reduction Method For Li-Ion Batteries, Li-Hong Yu, Yu-Liang Cao, Xiao-Fei Zhang, Han-Xi Yang, Xin-Ping Ai

Journal of Electrochemistry

The cathode material of olivine LiFePO_(4) was prepared by a novel method of polyacrylate-pyrolysis-reduction.XRD demonstrates that the material have the olivine structure.SEM photo shows an average particle-size of about 100 nm with a well distribution.Electrochemical test of cycling at a constant current reveals the discharge capacity of 138 mAh/g and a good cycling stability.It is a novel practicable technology to prepare LiFePO_(4) by using polyacrylate-pyrolysis-reduction method.

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Stm Tip-Induced Nanostructuring-Replacement Method To Construct Pt Surface Nanostructures, Jin-Gang Wang, Jing Tang, Zhao-Bin Chen, Bing-Wei Mao Nov 2006

Stm Tip-Induced Nanostructuring-Replacement Method To Construct Pt Surface Nanostructures, Jin-Gang Wang, Jing Tang, Zhao-Bin Chen, Bing-Wei Mao

Journal of Electrochemistry

STM tip-induced surface nanostructuring based on "Jump-to-contact" mechanism is a nanostructuring technique that has the highest resolution in aqueous solutions.However,for metals that have high cohesive energy,atoms would transfer from surface to tip instead,which limits the wide application of this technique.In this paper,we present a two-step Nanostructuring-Replacement method to construct metal nanoclusters that cannot be obtained directly via the "Jump-to-contact" mechanism.The method is demonstrated to construct Pt nanoclusters that are of great interest in catalysis and electrocatalysis but cannot be constructed via the "Jump-to-contact" mechanism.Since Cu is the most intensively studied and successful system in the tip-induced nanostructuring,it is utilized as …

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Preparation And Electrochemical Property Of Bam Boo-Shaped Silicon Nanotubes, Zeng-Tao Liu, Yan-Peng Fu, Chen Li, Yong Yang Nov 2006

Preparation And Electrochemical Property Of Bam Boo-Shaped Silicon Nanotubes, Zeng-Tao Liu, Yan-Peng Fu, Chen Li, Yong Yang

Journal of Electrochemistry

A novel 1D bamboo-shaped silicon nanotubes was synthesized by chemical vapor deposition with Au catalyst and their electrochemical properties were primarily studied.The results showed that these silicon nanotubes were amorphous with the length about tens micrometer and the diameter about one hundred nanometer.Cyclic voltammetry studies showed that Li ions could intercalate into such silicon nanotubes at two location,i.e.,from the conjoint location and the wall of the hole.Meanwhile,the bamboo-shaped structure could help release the expansion of volume,which is usually serious in the lithium batteries.

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Preparation And Electrochemical Characterization Of Anatase Tio_2 Nanotubes, Bin Cao, Jin-Wei Xu, Ling-Hong Ding, Wei-Feng Zhang Nov 2006

Preparation And Electrochemical Characterization Of Anatase Tio_2 Nanotubes, Bin Cao, Jin-Wei Xu, Ling-Hong Ding, Wei-Feng Zhang

Journal of Electrochemistry

Titanium oxide nanotubes were prepared by hydrothermal treatment of anatase-type TiO_(2) powders and NaOH solution in an autoclave.Transmission Electron Microscopy and X-ray Diffraction showed that the product is anatase-type TiO_(2) nanotubes.The constant charge-discharge current and cyclic voltammetry exhibited the TiO_(2) nanotubes have a large initial lithium insertion capacity of 260 mA·h/g and good reversibility.This study indicates that TiO_(2) nanotubes might be a good negative electrode materical for second lithium battery in the future.

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Fabrication Of Gold Electrode Array Based On Co_2 Laser Ablation, Wei Zhang, Jiang-Qun Xiao, Yong-Liang Zhou Nov 2006

Fabrication Of Gold Electrode Array Based On Co_2 Laser Ablation, Wei Zhang, Jiang-Qun Xiao, Yong-Liang Zhou

Journal of Electrochemistry

A rapid process is described to produce single or multiple electrodes of any shape based on CO_(2) laser ablation for microfluidic chip.The method is as follow: coating a kind of material as sacrifice layer on a piece of glass with sputtered Cr and Au;designing the needed pattern on a computer;selecting proper parameters and ablating with CO_(2) laser;wiping of Au/Cr and sacrifice layer,and obtain electrodes at last.The microfluidic chip was gotten by reversely bonding with a piece of PDMS,and sealing around with PDMS prepolymer.The mask' effect is the main factor that influencing electrode quality.The width of electrodes could be 100 μm.Demonstrated …

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Fabrication And Characterization Of Gadolinium Hexacyanoferrate Modified Electrode, Yan-Mao Shi, Pan Du, Ping Wu, Yao-Ming Zhou, Chen-Xin Cai Nov 2006

Fabrication And Characterization Of Gadolinium Hexacyanoferrate Modified Electrode, Yan-Mao Shi, Pan Du, Ping Wu, Yao-Ming Zhou, Chen-Xin Cai

Journal of Electrochemistry

A new electroactive polynuclear inorganic compound of rare earth metal hexacyanoferrate,gadolinium hexacyanoferrate(GdCHF),was prepared by electrochemically deposition on the surface of a glassy carbon electrode with a potential cycling procedure.The result of SEM indicated that the GdHCF was in the form of particles adhered on the surface of electrode.There were two different shapes and sizes of GdHCF forming on the surface of electrode.FTIR spectrum of GdHCF showed a very strong and sharp peak,which located at 2062.5 cm~(-1) and corresponded to the stretching vibration of the C≡N group in the GdHCF.The cyclic voltammetric results indicated that the GdHCF/GC electrode exhibited two pairs …

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