نتایج جستجو برای: electrochemical studies

تعداد نتایج: 1473232  

Journal: :Reaction chemistry & engineering 2016
Alexander G O'Brien Oana R Luca Phil S Baran Donna G Blackmond

An electrochemical cell coupled with a recycle loop through a transmission FTIR cell is employed in studies of two free radical organic reactions, the oxidation of allylic alcohols and the trifluoromethylation of heteroarenes. Rapid mixing through the recycle loop allows continuous monitoring of reaction progress. Electrochemical generation of free radicals allows their controlled mediation int...

2002
MARCIN OPALLO

The studies of the electrochemical redox reactions in solvated silica sol–gel glass were reviewed. The methodology of the experiments with emphasis on the direct preparation of the solid electrolyte and the application ultramicroelectrodes was described. Generally, the level of the electrochemical signal is not much below that observed in liquid electrolyte. The current depends on time elapsed ...

2003
Yongkang Ye Huangxian Ju

The electrochemical studies on the behaviors and recognition of DNA have attracted considerable attention. DNA biosensors based on nucleic acid hybridization process are rapidly being developed towards the goal of rapid and inexpensive diagnosis of genetic and infectious diseases. This brief review focuses on the current state of the DNA electrochemical sensors with emphasis on recent advances,...

Journal: :Nanotechnology 2006
Scott Miserendino Juhwan Yoo Alan Cassell Yu-Chong Tai

A novel parylene-embedded carbon nanotube nanoelectrode array is presented for use as an electrochemical detector working electrode material. The fabrication process is compatible with standard microfluidic and other MEMS processing without requiring chemical mechanical polishing. Electrochemical studies of the nanoelectrodes showed that they perform comparably to platinum. Electrochemical pret...

Journal: :ACS nano 2012
Amit Kumar Thomas M Arruda Yunseok Kim Ilia N Ivanov Stephen Jesse Chung W Bark Nicholas C Bristowe Emilio Artacho Peter B Littlewood Chang-Beom Eom Sergei V Kalinin

Local electrochemical phenomena on the surfaces of the LaAlO(3)-SrTiO(3) heterostructure are explored using unipolar and bipolar dynamic electrochemical strain microscopy (D-ESM). The D-ESM suggests the presence of at least two distinct electrochemical processes, including fast reversible low-voltage process and slow high-voltage process. The latter process is associated with static surface def...

2013
Erfan Salahinejad Mohammad Jafar Hadianfard Digby Donald Macdonald Samin Sharifi-Asl Masoud Mozafari Kenneth J. Walker Armin Tahmasbi Rad Sundararajan V. Madihally Lobat Tayebi

The corrosion and cell viability behaviors of nanostructured, nickel-free stainless steel implants were studied and compared with AISI 316L. The electrochemical studies were conducted by potentiodynamic polarization and electrochemical impedance spectroscopic measurements in a simulated body fluid. Cytocompatibility was also evaluated by the adhesion behavior of adult human stem cells on the su...

Journal: :Nanoscale 2013
Amit Kumar Chi Chen Thomas M Arruda Stephen Jesse Francesco Ciucci Sergei V Kalinin

An approach is developed for probing the thermodynamics and kinetics of irreversible electrochemical reactions on solid surfaces based on local frequency-voltage spectroscopy. For a model Li-ion conductor surface, two regimes for bias-controlled behavior are demonstrated and ascribed to the difference in the critical nucleus size. The electrostatic and electrochemical phenomena at the tip-surfa...

2002
Allen J. Bard Fu-Ren F. Fan Juhyoun Kwak

The technlque of scannlng electrochemical mlcroscopy (SECM) Is descrlbed. I n thls technlque the electrolysls current that flows as an ultramicroelectrode tlp (diameter ca. 10 gm) Immersed In a soiutlon Is moved above a substrate surface is used to characterize processes and structural features of the substrate. Modes of Operation consldered Include collectlon modes, where products electrogener...

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