Dielectric anomalous response of water at 60 °C

Martinez Maestro, L; del Valle, JC; Camarillo, E; Gonzalo, JA; Aragó, C; Marqués, M; Jaque, D; Lifante, G; García Solé, J; Santacruz-Gómez, K; Carrillo-Torres, RC; Jaque, F

Abstract

Recently, the paraelectric response of water was investigated in the range 0–100 °C. It showed an almost perfect Curie–Weiss behaviour up to 60 °C, but a slight change in slope of 1/εd versus T at 60 °C was overlooked. In this work, we report optical extinction measurements on metallic (gold and silver) nanoparticles dispersed in water, annealed at various temperatures in the range from 20 to 90 °C. An anomalous response at 60 °C is clearly detectable, which we associate to a subtle structural transformation in the water molecules at that temperature. This water anomaly is also manifested by means of a blue shift in the longitudinal surface plasmon resonance of the metallic nanoparticles for the solutions annealed at temperatures higher than about 60 °C. A reanalysis of 1/εd (T) for water in the whole temperature range leads us to conclude that the water molecule undergoes a subtle transformation from a low temperature (0–60 °C) configuration with a dipole moment μ1 = 2.18 D (close to the molecular dipole moment of ice) to a high temperature (60–100 °C) configuration with μ2 = 1.87 D (identical to the molecular dipole moment in water vapour).

Citation

Martinez Maestro, L., del Valle, J., Camarillo, E., Gonzalo, J., Aragó, C., Marqués, M., …Jaque, F. (2015). Dielectric anomalous response of water at 60 °C. Philosophical Magazine, 95(7), 683-690. https://doi.org/10.1080/14786435.2014.1000419

• Journal Article Type: Article
• Acceptance Date: Dec 10, 2014
• Online Publication Date: Feb 5, 2015
• Publication Date: Feb 5, 2015
• Deposit Date: Dec 5, 2019
• Journal: Philosophical Magazine
• Print ISSN: 1478-6435
• Electronic ISSN: 1478-6443
• Publisher: Taylor and Francis
• Volume: 95
• Issue: 7
• Pages: 683-690
• DOI: https://doi.org/10.1080/14786435.2014.1000419
• Publisher URL: https://doi.org/10.1080/14786435.2014.1000419
• Related Public URLs: https://www.tandfonline.com/toc/tphm20/current
• Additional Information: Funders : Spanish Ministerio de Economía y Competitividad;DGPA-UNAM;Secretaría de Estado de Investigación Desarrollo e Innovación of the Spanish Ministerio de Economía y Competitividad