نتایج جستجو برای: electrochemical study

تعداد نتایج: 4011367  

2014
Youjuan Zhang Yuanying Liu Jing Chen Qifei Guo Ting Wang Huan Pang

Co3V2O8 thin nanoplates are firstly described as a kind of electrode material for supercapacitors. More importantly, from electrochemical measurements, the obtained Co3V2O8 nanoplate electrode shows a good specific capacitance (0.5 A g(-1), 739 F g(-1)) and cycling stability (704 F g(-1) retained after 2000 cycles). This study essentially offers a new kind of metal vanadium oxides as electroche...

2012
Helena Prima-Garcia Eugenio Coronado Juan P Prieto-Ruiz Francisco M Romero

This paper reports on molecular-based magnetic thin films of Prussian blue analogues (PBA) with high critical temperatures composed of mixed-valence chromium cyanides. The thin films of PBA were synthesized by means of electrodeposition technique. Morphology and magnetic study are presented in a function of electrochemical deposition conditions. We present the electrochemical methods as a promi...

Journal: :physical chemistry and electrochemistry 0
davood kaviani young researchers and elite club, east tehran branch, islamic azad university, tehran, iran majid saghi department of chemistry, faculty of science, arak branch, islamic azad university, arak, iran maryam agha mohammadi department of chemistry, faculty of science, arak branch, islamic azad university, arak, iran mohammad hosein bigtan department of chemistry, faculty of science, arak branch, islamic azad university, arak, iran

the studies performed about electrochemical oxidation 2-amino-4-methylphenol indicate that ortho-quinone yielded through oxidation of this chemical compound was unstable and it could be used as michael acceptor under solvent influences, carrier electrolyte, additives and could be transformed into the various compounds in the form of 1-4 addition michael reaction. based on this, in the paper fir...

2012
Yanxue Chen Lin Wei Guanghua Zhang Jun Jiao

Open structure ZnO/CdSe core/shell nanoneedle arrays were prepared on a conducting glass (SnO2:F) substrate by solution deposition and electrochemical techniques. A uniform CdSe shell layer with a grain size of approximately several tens of nanometers was formed on the surface of ZnO nanoneedle cores after annealing at 400°C for 1.5 h. Fabricated solar cells based on these nanostructures exhibi...

Journal: :Analytical chemistry 2012
Jiyeon Kim Mei Shen Nikoloz Nioradze Shigeru Amemiya

The control of a nanometer-wide gap between tip and substrate is critical for nanoscale applications of scanning electrochemical microscopy (SECM). Here, we demonstrate that the stability of the nanogap in ambient conditions is significantly compromised by the thermal expansion and contraction of components of an SECM stage upon a temperature change and can be dramatically improved by suppressi...

2015
Hyunjin Cho Sungchan Park Dong-Il Won Sang Ook Kang Seong-Soo Pyo Dong-Ik Kim Soo Min Kim Hwan Chul Kim Myung Jong Kim

The morphology of the surface and the grain orientation of metal catalysts have been considered to be two important factors for the growth of white graphene (h-BN) by chemical vapour deposition (CVD). We report a correlation between the growth rate of h-BN and the orientation of the nickel grains. The surface of the nickel (Ni) foil was first polished by electrochemical polishing (ECP) and subs...

Journal: :Chemical communications 2010
Yadong Xue Jianping Lei Xu Xu Lin Ding Chun Zhai Feng Yan Huangxian Ju

A method for real-time evaluation of cell viability was developed by using oxygen as an endogenous indicator in scanning electrochemical microscopy to monitor the nanoscale height change of a single cell in a physiological environment with a novel Pt nanodisk electrode and a newly designed step-approaching strategy.

Journal: :Dalton transactions 2016
Danielle A Henckel Yuting F Lin Theresa M McCormick Werner Kaminsky Brandi M Cossairt

An electrocatalytically active cobalt diimine monoxime monoximate complex was deprotonated by 1-methylimidazole affording a doubly deprotonated complex that serves as a versatile precursor for synthesis of a variety of multimetallic complexes with Co-Zn, -Cd, -Mn and -Ru coordination. These complexes were studied using a combination of spectroscopic, analytical and electrochemical techniques, r...

2013
Lukasz Sadowski

In recent years, the corrosion of steel reinforcement has become a major problem in the construction industry. Therefore, much attention has been given to developing methods of predicting the service life of reinforced concrete structures. The progress of corrosion cannot be visually assessed until a crack or a delamination appears. The corrosion process can be tracked using several electrochem...

Journal: :Analytical chemistry 2006
Wei Zhan Allen J Bard

Giant liposomes containing Ru(bpy)(3)(2+) (bpy = 2,2'-bipyridine) were prepared as model systems for biomembranes and cells and studied by scanning electrochemical microscopy (SECM). Conical carbon fiber tips of submicrometer size were used to approach, image, and puncture individual liposomes immobilized on glass substrates. SECM images of the liposomes were obtained, and the leakage of Ru(bpy...

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