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Topic: Electrochemical


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In the News (Sat 2 Jun 12)

  
  CiteULike: Electrochemical magnetoimmunosensing strategy for the detection of pesticides residues.
A novel electrochemical immunosensing strategy for the detection of atrazine based on magnetic beads is presented.
The electrochemical detection is thus achieved through a suitable substrate and mediator for the enzyme HRP.
The detection limit for atrazine using the competitive electrochemical magnetoimmunosensing strategy with anti-atrazine-specific antibody covalent coupled with tosyl-activated magnetic beads was found to be 6 x 10(-)(3) microg L(-)(1) (0.027 nmol L(-)(1)).
www.citeulike.org /user/biblio24/article/803465   (495 words)

  
  Applications of electrochemical microfabrication: An introduction
Electrochemical deposition (plating) is the oldest industrial application of an electrochemical reaction.
Electrochemical processing through polymeric photoresist masks is a primary technique for microfabrication of high-density patterned structures [1].
The electrochemical fabrication of C4s, which is a highly selective and efficient process[8], is extendable to larger wafers, a wider range of alloys, and finer C4 dimensions than are possible by evaporation; it has thus become the process of choice for various applications.
www.research.ibm.com /journal/rd/425/intro.html   (1959 words)

  
 Method of conditioning electrochemical baths in plating technology - Patent 6893548
One approach to conditioning the electrochemical bath composition during substrate to substrate processing is to analyze the electrochemical bath periodically during the plating process to determine the composition and concentration of the constituents in the electrochemical bath.
In particular, an electrochemical bath is conditioned to have a desired composition, preferably one that replicates the composition of the electrochemical bath at about the end of life of the electrochemical bath, where processing conditions exist that are observed to produce improved control and management of the copper film quality.
Once the electrochemical bath produces substrates with the desired material deposition, a sample of the initial electrochemical bath may be removed and tested to determine the constituents and corresponding concentrations of the constituents in the new, or second, electrochemical bath.
www.freepatentsonline.com /6893548.html   (8405 words)

  
 Electrochemical Cells
An electrochemical cell can be created by placing metallic electrodes into an electrolyte where a chemical reaction either uses or generates an electric current.
Electrochemical cells which generate an electric current are called voltaic cells or galvanic cells, and common batteries consist of one or more such cells.
An electrochemical cell which causes external electric current flow can be created using any two different metals since metals differ in their tendency to lose electrons.
hyperphysics.phy-astr.gsu.edu /hbase/chemical/electrochem.html   (670 words)

  
 CiteULike: An electrochemical immunosensor for aflatoxin M1 determination in milk using screen-printed electrodes.
Then electrochemical immunosensors were fabricated by immobilising the antibodies directly on the surface of screen-printed electrodes (SPEs), and allowing the competition to occur between free AFM1 and that conjugated with peroxidase (HRP) enzyme.
A comparison between the spectrophotometric and electrochemical procedure showed that a better detection limit and shorter analysis time could be achieved using electrochemical detection.
A comparison between the spectrophotometric and electrochemical procedure showed that a better detection limit and shorter analysis time could be achieved using electrochemical detection.}, address = {Dipartimento di Scienze e Tecnologie Chimiche, Università di Roma Tor Vergata, Via della Ricerca Scientifica, 00133 Roma, Italy.
www.citeulike.org /user/biblio24/article/803658   (603 words)

  
 Enhanced charge retention electrochemical hydrogen storage alloys and an enhanced charge retention electrochemical cell ...
The electrochemical cell of claim 11 wherein the surface of the negative electrode is substantially resistant to the effects of redox couple reduction mechanisms.
The electrochemical cell of claim 11 wherein the modified hydrogen storage alloy active material is less susceptible to corrosion in the electrolyte than unmodified hydrogen storage alloy active material, and the surface of the negative electrode of modified hydrogen storage alloy active material has less surface roughness than an unmodified electrode after repeated charge-discharge cycles.
The electrochemical cell of claim 47 wherein the high conductivity material is nickel, and the modified hydrogen storage alloy inhibits the increase of nickel in the surface of the electrode.
www.freepatentsonline.com /4728586.html   (12512 words)

  
 Microfabrication by electrochemical metal removal
Electrochemical metal removal is an alternative wet-etching process where the workpiece is made an anode in an electrolytic cell in which a salt solution is used as an electrolyte and controlled metal removal takes place by application of an external current.
Recent investigations of the development of advanced electrochemical metal-removal processes demonstrate that the ECM concepts can be effectively used in the removal and patterning of conducting films that are of interest in the electronics industry [5,6].
The material-removal rate in EMM depends on the specific electrochemical behavior of the metal/electrolyte system and is determined by the applied current density according to the Faraday law [9].
www.research.ibm.com /journal/rd/425/datta.html   (6278 words)

  
 Elsyca - Electrochemical modelling   (Site not responding. Last check: )
Electrochemical Machining (ECM) is an important method for removing metal by anodic dissolution in a conducting electrolyte.
Electrochemical etching of metals is somehow related to ECM since it involves the selective removal of metal from an initial metal foil or predeposited metal layer.
The photoresist on the exposed areas is removed by a chemical agent and subsequently the exposed areas are electrochemically etched.
www.elsyca.com /xcms/lang__en/3412/solutions-references.aspx   (373 words)

  
 How Oxygen, Electrochemical Toxic, and Metal Oxide Semiconductor Sensors Work
Substance-specific electrochemical sensors consist of a diffusion barrier which is porous to gas but nonporous to liquid, reservoir of acid electrolyte (usually sulfuric or phosphoric acid), sensing electrode, counter electrode, and (in three electrode designs) a third reference electrode.
Electrochemical sensors are stable, long lasting, require very little power and are capable of resolution (depending on the sensor and contaminant being measured) in many cases to 0.1 ppm.
Electrochemical sensor designs may include a selective external filter designed to remove interfering gases which would otherwise have an effect on the sensing electrode.
www.smglink.com /biosystems/appnotes/howoxyge.htm   (1989 words)

  
 Gamry and Electrochemical Noise
Electrochemical Noise, commonly abbreviated ECN, is an electrochemical technique in which the potential and/or current signals that arise directly from the electrochemical reactions taking place on an electrode surface are measured and interpreted.
The electrochemical instrument is not applying any signal to the sample that might improperly influence the result.
For the last several years, Technical Symposia on Electrochemical Noise have been held at the annual NACE meeting (www.nace.org) with spirited participation from a number of researchers.
www.gamry.com /App_Notes/EchemNoise.htm   (399 words)

  
 Electrochemical Reactions
Electrochemical cells that use an oxidation-reduction reaction to generate an electric current are known as galvanic or voltaic cells.
Oxidation always occurs at the anode and reduction always occurs at the cathode of an electrochemical cell.
The Zn/Zn half-cell is therefore the anode, and the Cu /Cu half-cell is the cathode, as shown in the figure of the Daniell cell.
chemed.chem.purdue.edu /genchem/topicreview/bp/ch20/electro.php   (3525 words)

  
 electrochemical noise
Electrochemical noise refers to naturally occurring fluctuations in corrosion potential and corrosion current flow.
Electrochemical noise (EN) monitoring can be further subdivided into electrochemical potential noise (EPN) measurements and electrochemical current noise (ECN) measurements.
Electrochemical noise data can provide an indication of the type of corrosion damage that is occurring; it is widely used to distinguish between general and localized attack.
www.corrosion-club.com /noise.htm   (312 words)

  
 Wiley::Fundamentals of Electrochemical Deposition, 2nd Edition
Fundamentals of Electrochemical Deposition, Second Edition is a comprehensive introduction to one of today's most exciting and rapidly evolving fields of practical knowledge.
This new edition updates the prior edition to address the new developments in the science and its applications, with new chapters on innovative applications of electrochemical deposition in semiconductor technology, magnetism and microelectronics, and medical instrumentation.
Written by an author team with extensive experience in both industry and academe, this reference and text provides a well-rounded introduction to the field for students, as well as a means for professional chemists, engineers, and technicians to expand and sharpen their skills in using the technology.
www.wiley.com /WileyCDA/WileyTitle/productCd-0471712213.html   (294 words)

  
 Electrochemical Double Layer Capacitors
Electrochemical capacitors are charge storage devices, which have higher energy density than conventional dielectric capacitors and have higher power density than batteries.
Electrochemical capacitors also used in hybrid electric vehicles in combination with batteries as their power density is higher than batteries for load leveling.
Electrochemical capacitors in combination with batteries occupy less space and are light, have excellent cold weather starting and increased battery life.
bama.ua.edu /~rreddy/projects/ELDcapacitors.htm   (338 words)

  
 Electrochemical Instrumentation
Interfacial electrochemical methods measure the interactions between an electrode and the solution in contact with the electrode.
Electrical and chemical transport properties are measured with various methods, which also allow to determine electronic or ionic conductivities and to investigate the elementary processes which determine the transport properties.
Most electrochemical work with an electrochemical cell is achieved using what is called a potentiostat.
www.corrosion-doctors.org /Instrumentation/Introduction.htm   (454 words)

  
 electrochemical corrosion monitoring   (Site not responding. Last check: )
Electrochemical techniques rely on electrochemical corrosion theory and the measurement of electrochemical potentials and/or currents to monitor corrosion damage.
The electrochemical potential is fundamentally related to thermodynamics of corrosion reactions, while currents are related to reaction kinetics (rate of corrosion).
Generally, confidence in electrochemical corrosion data has to be acquired over time, due to the qualitative or semi-quantitative nature of this data.
www.corrosion-club.com /elchem.htm   (205 words)

  
 Electrochemical
Electrochemical corrosion testing methods are extremely useful for the determination of corrosion behavior of alloys and coatings in corrosive environments.
Our electrochemical measurments systems (Gamry and Princenton Computerized Corrosion Measurment Systems) provide accurate and dependable data that can be used in corrosion investigations, the selection of materials for corrosive environments, and prevention of corrosion failure.
The electrochemical system at Matco identifies whether a certain alloy, such as nickel alloy or stainless steel, will pit in corrosive environments (ASTM G61) and whether a particular alloy system is the best choice for your specific application.
www.matcoinc.com /?type=cc&id=364   (1343 words)

  
 Expert: Electrochemical Processing Expert
Expert directed much of his efforts toward the discovery of the lowest cost electrochemical system, which often meant finding ways to operate an electrolysis using water as the solvent for the electrolytic solution, finding low cost anodes, cathodes, and other electrochemical process materials and using undivided cells.
During the electrolysis, gallium metal is dissolved by electrochemical oxidation from the low purity anode, transported through the electrolytic solution as gallate ion, and then deposited at the cathode in an electroplating process (or electrowinning process) as high purity molten gallium.
His experience with ionic membranes is a common thread throughout his work in electrosynthesis, electrochemical sensors, as well as electrochemical waste treatment.
www.intota.com /viewbio.asp?bioID=603589&perID=108454   (780 words)

  
 About ECS
ECS was founded in 1902 as an international nonprofit, educational organization concerned with a broad range of phenomena relating to electrochemical and solid-state science and technology.
The Electrochemical Society has more than 8,000 scientists and engineers in over 70 countries worldwide who hold individual membership, as well as roughly 100 corporations and laboratories that hold corporate membership.
Born as the American Electrochemical Society in 1902, the Society’s name was changed to The Electrochemical Society in 1930 to more accurately reflect its international activities and membership.
www.electrochem.org /ecs   (276 words)

  
 Electrochemical cells patent invention
Generally, an electrochemical cell includes two electrodes, called an anode and a cathode, and an electrolyte disposed between the electrodes.
[0004] In one type of electrochemical cell, sometimes called a hydrogen fuel cell, the anode reactant is hydrogen gas, and the cathode reactant is oxygen (e.g., from air).
The electrochemical hydrogen generator has a first cathode which generates hydrogen gas, and a first anode which is adjacent to the first cathode.
www.freshpatents.com /Electrochemical-cells-dt20060817ptan20060183010.php   (1361 words)

  
 Electrochemical Cells
An electrochemical cell is composed to two compartments or half-cells, each composed of an electrode dipped in a solution of electrolyte.
Although the energy available from a single cell is relatively small, electrochemical cells can be linked in series to boost their energy output.
In the lead-acid battery, each cell has a lead metal anode and lead (IV) oxide (lead dioxide) cathode both of which are immersed in a solution of sulfuric acid.
library.kcc.hawaii.edu /external/chemistry/everyday_electro.html   (650 words)

  
 Advanced electrochemical process research
One of the goals was to optimise the electrical parameters of the electrochemical reactor in order to obtain a homogenous deposition of material on the anode.
In the next phase of the research it became clear that the motion of ions in the liquid and the mass transport phenomena transport due to convection, diffusion and migration needed to be taken into account.
Elsyca’s approach allows customers to model their electrochemical reality, accounting for the physico-chemical parameters of the electrolyte bath, the complete geometry of the electrochemical cell, the electrode reactions and all process parameters ranging from flow rates to DC or pulse reverse parameters.
www.europhysicsnews.com /full/30/article8/article8.html   (1550 words)

  
 Pair O Docs - Electrochemical Corrosion Experts
Choosing the right electrochemical test and test conditions is often difficult and perplexing since there are several different types of electrochemical tests and many different ways to conduct these tests.
The test protocols developed from Steve's research on electrochemical testing have extremely high correlations between the predictions from electrochemical tests and actual corrosion.
electrochemical cells enables us to screen over 50 test variables at one time, and provide actionable results to our clients and customers on a timely basis with a high level of statistical confidence.
www.pairodocspro.com /Testing.htm   (368 words)

  
 Electrochemical Noise Response Under   (Site not responding. Last check: )
Therefore it is of paramount importance to distinguish electrochemical and electrical noise levels.
Electrochemical potential noise was used to evaluate such noise levels with different rotation speeds.
The conclusions is that an electrochemical noise technique can be used in convective electrochemical interphase studies using the rotating disk electrode, since the non- electrochemical noise sources are of low intensity.
ce.eng.usf.edu /research_labs/corrosion/pg18.html   (446 words)

  
 Welcome to ECS: The Electrochemical Society
In it they described their 1955 discovery at Bell Labs of ways to form a silicon-dioxide layer on the surface of silicon wafers during the high-temperature diffusion process.
This path is guided by the ECS mission, which is not about recognition or profits; our mission is to disseminate knowledge… to advance solid-state and electrochemical science and technology… to ultimately make the world a better place.
ECS and the International Society of Electrochemistry (ISE) recently met to intensify their co-operation: to exchange of information, to co-ordinate meeting schedules, and to create a joint task force to develop other ideas to serve their communities.
www.electrochem.org   (424 words)

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