Next Article in Journal
Thermodynamic and Differential Entropy under a Change of Variables
Next Article in Special Issue
Entropy-Related Extremum Principles for Model Reduction of Dissipative Dynamical Systems
Previous Article in Journal
Turing Systems, Entropy, and Kinetic Models for Self-Healing Surfaces
Previous Article in Special Issue
On the Entropy Based Associative Memory Model with Higher-Order Correlations
Article Menu

Export Article

Open AccessArticle
Entropy 2010, 12(3), 570-577; doi:10.3390/e12030570

Entropy Variation in the Two-dimensional Phase Transition of Anthracene Adsorbed at the Hg Electrode/Ethylene Glycol Solution Interface

Department of Chemistry, University of Modena and Reggio Emilia, Via Campi 183, 41125 Modena, Italy
Received: 14 December 2009 / Revised: 25 February 2010 / Accepted: 11 March 2010 / Published: 16 March 2010
(This article belongs to the Special Issue Entropy in Model Reduction)
View Full-Text   |   Download PDF [455 KB, uploaded 24 February 2015]   |  

Abstract

The adsorption of anthracene (C14H10), at the mercury electrode/ethylene glycol (EG) solution interface, is characterized by a low and almost constant capacity (about 8 μF cm−2) region (capacitive “pit” or “plateau”) in capacity vs. potential curves, upon selection of suitable values of temperature, bulk concentration and applied potential values. This result is rationalized assuming the occurrence of a 2D phase transition between two distinct adsorbed phases: (i) a “disordered” phase, characterized by a flat “parallel” disposition of the aromatic moiety on the electrode surface (ii) an “ordered” phase, characterized by a “perpendicular” disposition of the aromatic moiety on the electrode surface. The experimental evidence is rationalized by considering the chemical potential as an explicit function of the “electric field/adsorbed molecule” interaction. Such a modelistic approach enables the determination of the relevant standard entropy variation. View Full-Text
Keywords: phase transition; two dimensional; adsorption; anthracene phase transition; two dimensional; adsorption; anthracene
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Fontanesi, C. Entropy Variation in the Two-dimensional Phase Transition of Anthracene Adsorbed at the Hg Electrode/Ethylene Glycol Solution Interface. Entropy 2010, 12, 570-577.

Show more citation formats Show less citations formats

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Entropy EISSN 1099-4300 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top