scholarly journals Determination of the Standard Entropy Changes of Ion Transfer for 1-Alkylpyridinium Ions by Thermal Modulation Voltammetry with Laser Heating at a Water/1,2-Dichloroethane Interface

2014 ◽  
Vol 30 (5) ◽  
pp. 595-599 ◽  
Author(s):  
Riho WATANABE ◽  
Yui TERAUCHI ◽  
Makoto SAKAUE ◽  
Teruo HINOUE
Keyword(s):  
Laser Heating ◽  
Standard Entropy ◽  
Ion Transfer ◽  
Thermal Modulation ◽  
Entropy Changes

scholarly journals Laser-Heating Thermal Modulation Voltammetric Determination of Phosphate Ion Using a Graphite-Reinforced Carbon Electrode

2009 ◽  
Vol 25 (4) ◽  
pp. 499-503 ◽  
Author(s):  
Shovon Mohammad SHARIAR ◽  
Mizuki SUGA ◽  
Yumiko NISHIKAWA ◽  
Teruo HINOUE
Keyword(s):  
Laser Heating ◽  
Voltammetric Determination ◽  
Carbon Electrode ◽  
Thermal Modulation ◽  
Phosphate Ion

scholarly journals Thermo-voltage measurements of atomic contacts at low temperature

2016 ◽  
Vol 7 ◽  
pp. 767-775 ◽  
Author(s):  
Ayelet Ofarim ◽  
Bastian Kopp ◽  
Thomas Möller ◽  
León Martin ◽  
Johannes Boneberg ◽  
...  
Keyword(s):  
Finite Element ◽  
Low Temperature ◽  
Temperature Difference ◽  
Laser Heating ◽  
Laser Source ◽  
Break Junction ◽  
Resistance Change ◽  
Element Simulation ◽  
Novel Method

We report the development of a novel method to determine the thermopower of atomic-sized gold contacts at low temperature. For these measurements a mechanically controllable break junction (MCBJ) system is used and a laser source generates a temperature difference of a few kelvins across the junction to create a thermo-voltage. Since the temperature difference enters directly into the Seebeck coefficient S = −ΔV/ΔT, the determination of the temperature plays an important role. We present a method for the determination of the temperature difference using a combination of a finite element simulation, which reveals the temperature distribution of the sample, and the measurement of the resistance change due to laser heating of sensor leads on both sides next to the junction. Our results for the measured thermopower are in agreement with recent reports in the literature.

scholarly journals Voltammetric Methods in Metallothionein Research

2005 ◽  
Vol 3 (1-2) ◽  
pp. 43-53 ◽  
Author(s):  
Ivana Šestáková ◽  
Tomáš Navrátil
Keyword(s):  
Metal Ion ◽  
Composite Electrode ◽  
Differential Pulse ◽  
Carbon Composite ◽  
Ion Transfer ◽  
Adsorbed State ◽  
Carbon Composite Electrode ◽  
Pulse Voltammetry ◽  
Voltammetric Methods

The application of voltammetric methods using different rates of polarisation on HMDE reveal inert or labile behaviour of Cd- or Zn- complexes in the presence of excessive cadmium or zinc ions in solution. This phenomenon was demonstrated first on the simplest phytochelatin – complex of peptide(γ-Glu-Cys)2Glywith cadmium, later on rabbit liver metallothioneins –Cd7MTin the presence of cadmium andCd5Zn2MTin the presence of zinc. Voltammetric methods can distinguish between labile and inert complexes present simultaneously and therefore could elucidate their role in reactions of metal ion transfer.Another method using different rates of polarisation – elimination voltammetry with linear scan – proved that S-tetracoordinated complexes of Cd(II) or Zn(II) in the above-mentioned metallothioneins on HMDE are reduced in the adsorbed state. This implies the possibility of increasing the sensitivity of identification or determination of the above complexes. On carbon composite electrode, similar behaviour of Cd-complexes as on HMDE was observed using differential pulse voltammetry.

A new method for determination of absorptivity during laser heating

1985 ◽  
Vol 25 (6) ◽  
pp. 779-781 ◽  
Author(s):  
E. Szil ◽  
L.B. Kiss ◽  
J. Kovács ◽  
P. Mogyorósi
Keyword(s):  
Laser Heating ◽  
New Method

scholarly journals Simple Ion Transfer at Liquid|Liquid Interfaces

2012 ◽  
Vol 2012 ◽  
pp. 1-34 ◽  
Author(s):  
L. J. Sanchez Vallejo ◽  
J. M. Ovejero ◽  
R. A. Fernández ◽  
S. A. Dassie
Keyword(s):  
Charge Transfer ◽  
Numerical Simulations ◽  
Phase Transfer ◽  
Electrolyte Solutions ◽  
Ion Transfer ◽  
Liquid Interfaces ◽  
Practical Applications ◽  
Theoretical Approaches ◽  
Charge Transfer Reactions

The main aspects related to the charge transfer reactions occurring at the interface between two immiscible electrolyte solutions (ITIES) are described. The particular topics to be discussed involve simple ion transfer. Focus is given on theoretical approaches, numerical simulations, and experimental methodologies. Concerning the theoretical procedures, different computational simulations related to simple ion transfer are reviewed. The main conclusions drawn from the most accepted models are described and analyzed in regard to their relevance for explaining different aspects of ion transfer. We describe numerical simulations implementing different approaches for solving the differential equations associated with the mass transport and charge transfer. These numerical simulations are correlated with selected experimental results; their usefulness in designing new experiments is summarized. Finally, many practical applications can be envisaged regarding the determination of physicochemical properties, electroanalysis, drug lipophilicity, and phase-transfer catalysis.

Determination of rate constants of ion transfer kinetics across immiscible electrolyte solutions

1998 ◽  
Vol 44 (1) ◽  
pp. 59-71 ◽  
Author(s):  
José A Manzanares ◽  
Riikka Lahtinen ◽  
Bernie Quinn ◽  
Kyösti Kontturi ◽  
David J Schiffrin
Keyword(s):  
Rate Constants ◽  
Electrolyte Solutions ◽  
Ion Transfer
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