Electrochemical potential arrangement of nanoclusters weakly coupled with metal surface

Ohgi, Taizo; Sakotsubo, Yukihiro; Ootuka, Youiti; Fujita, Daisuke
January 2004
Applied Physics Letters;1/26/2004, Vol. 84 Issue 4, p604
Academic Journal
We investigated the electrochemical potential arrangement of Au nanoclusters, 1–3 nm in diameter, weakly coupled with bulk Au surface through tunneling junctions. The measurement of the Coulomb staircase by scanning tunneling spectroscopy and the statistical analysis for clusters reveal that [μ(0)+μ(1)]/2, where μ(n) is the electrochemical potential of the cluster when the number of excess electrons changes between n-1 and n, distributes around the Fermi level of the bulk Au electrode with the standard deviation σ of 30–70 meV. The spacing ΔE of the equally spaced electrochemical potentials decreases with increasing cluster size, which leads to the breakdown of the charge neutrality of the clusters below ΔE∼0.3 eV due to the competition between σ and ΔE. © 2004 American Institute of Physics.


Related Articles

  • Electrochemical studies on nanofiller incorporated poly(vinylidene fluoride–hexafluoropropylene) (PVdF–HFP) composite electrolytes for lithium batteries. Stephan, A. Manuel; Nahm, Kee Suk; Kulandainathan, M. Anbu; Ravi, G.; Wilson, J. // Journal of Applied Electrochemistry;Oct2006, Vol. 36 Issue 10, p1091 

    Composite polymer electrolytes (CPE), comprising poly(vinylidene fluoride-hexafluoropropylene) (PVdF-HFP), aluminum oxyhydroxide, (AlO[OH]n - of 40 nm and 7 pm) as filler and LiN(C2F5SO2)2 or LiClO4 as lithium salt were prepared using a solution casting technique. The membranes were subjected to...

  • Electrochemical lysis of an intraocular tumour using a combination of electrode placements. Belyy, Y.; Tereshchenko, A.; Shatskih, A. // Ecancermedicalscience;2012, Vol. 6 Issue 271-285, p1 

    The objective of this experimental study was to develop a new combination technique for electrode placement and the histomorphological evaluation of its effectiveness for the electrochemical lysis of large intraocular tumours. Materials and methods. The ECL was conducted on two freshly...

  • Cyclic Voltammetric Studies of Carbon Steel in Deaerated NaHCO3 Solution. El-Naggar, M.M. // Journal of Applied Electrochemistry;Sep2004, Vol. 34 Issue 9, p911 

    The voltammetric response of per-cathodic activated carbon steel electrode in deaerated 0.50 m NaHCO3 solution at pH 8.72 and 25 °C at a scan rate of 25 mV s-1 was investigated. The influence of cycling, potential excursion and scanning rate on the anodic behavior was studied. The results...

  • Electrochemical Behavior of Mono- and Polycrystalline Zirconium Electrodes in Sulfuric Acid Solutions. Shavkunov, S. P.; Tolkachev, A. B. // Protection of Metals;May/Jun2003, Vol. 39 Issue 3, p222 

    Electrochemical behavior of a Zr electrode in sulfuric acid solutions is studied, at various overpotentials, temperatures, pH values, and concentrations of surfactants, in a cathodic potential range. A mechanism of hydrogen evolution at zirconium electrode is proposed. The supposition that...

  • Structural and electrical properties of Ba(Fe1/3Nb1/3Ta1/3)O3 perovskite. Chickpatil, Mallikarjun; Chitgopikar, Girija M.; Raibagkar, Ravindra L. // Journal of Materials Science: Materials in Electronics;Oct2007, Vol. 18 Issue 10, p991 

    Ba(Fe1/3Nb1/3Ta1/3)O3 (BFNT) perovskite compound (phase purity>99%) was synthesized by conventional ceramic preparation method. XRD, microstructure, impedance spectroscopy and ac conductivity properties were analyzed in this study. BFNT compound has a cubic crystal structure, having grain size...

  • Influence of hydroxyapatite on the corrosion resistance of the Ti-13Nb-13Zr alloy. Duarte, Laís; Biaggio, Sonia; Rocha-Filho, Romeu; Bocchi, Nerilso // Journal of Materials Science: Materials in Medicine;May2009, Vol. 20 Issue 5, p1009 

    Electrochemical analyses on the biocompatible alloy Ti-13Nb-13Zr wt% in an electrolyte simulating physiological medium (PBS solution) are reported. Hydroxyapatite (HA) films were obtained on the alloy by electrodeposition at constant cathodic current. Samples of the alloy covered with an...

  • Electrochemical Oxidation of Aminophylline at Film Platinum Electrodes, and its Determination in Cosmetic and Pharmaceutical Products. Wang, Lai-Hao; Wang, Chia-Chen // Microchimica Acta;Feb2006, Vol. 153 Issue 1/2, p95 

    The electrochemical behavior of aminophylline on glassy carbon electrodes, carbon paste electrodes, and on electrodeposited platinum electrodes were investigated in Britton-Robinson buffer (pH 2.59–8.08), phosphate buffer (pH 2.12 and 6.06), acetate buffer and an aqueous medium containing...

  • An Ab-Initio Theoretical Study of the Electrochemical Grafting Process of Alkynil(aryl)iodonium Salts on Glassy Carbon Surfaces. Daasbjerg, Kim; Del Pennino, Umberto; De Renzi, Valentina; Fontanesi, Claudio; Parenti, Francesca; Rastelli, Augusto // AIP Conference Proceedings;12/26/2007, Vol. 963 Issue 2, p477 

    The behaviour of alkynil(aryl)iodonium salts upon electrochemical reduction, on glassy carbon electrodes, is here studied by comparing both theoretical and experimental results. In particular, experimental results are obtained by means of cyclic voltammetry and chronocoulometric measurements as...

  • The Electrochemistry of a Gelatin Modified Gold Electrode. De Wael, Karolien; Verstraete, Annelies; Van Vlierberghe, Sandra; Dejonghe, Winnie; Dubruel, Peter; Adriaens, Annemie // International Journal of Electrochemical Science;Jun2011, Vol. 6, p1810 

    This paper discusses the electrochemical behaviour of gelatin coated gold electrodes in physiological pH conditions in a potential window -1.5 till 1.0 V vs SCE by performing cyclic voltammetry. A comparison is made between gelatin A and gelatin B, which have respectively a positive and a...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics