Long-range Attraction between Like-charged Colloids: Simulations and Microgravity Experiments

DOI:10.15011/ijmsa.32.320209
Int. J. Microgravity Sci. Appl. 2015p320209
Author
B.V.R. TATA, R.G. JOSHI and I.S. SOGAMI
Organization
Indira Gandhi Centre for Atomic Research, Department of Physics, Faculty of Science, Kyoto Sangyo University
Abstract
Deionized dilute charged colloidal systems exhibit gas-liquid and gas-solid coexistence and re-entrant transitions depending on suspensions parameters such as volume fraction, charge density and ionic strength. These observations constitute evidence for the existence of long-range attraction between like-charged colloids. Monte Carlo (MC) simulations using Sogami-Ise pair-potential, which has a long-range attractive term, could explain the above mentioned experimental observations. MC simulations, which correspond to zero gravity conditions, revealed coexistence of liquid-like droplet with rare phase (gas-like) and voids coexisting with dense (solid-like) phase clusters. These predictions will be verified by the project of microgravity experiments in space and the outcome is expected to provide evidence for the existence of long-range attraction between like charged colloids.
Keyword(s)
Charged Colloids, Long-range attraction, Simulations, Light Scattering, Confocal microscopy, Microgravity experiments.
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Received 12 Feb. 2015, accepted 24 Mar. 2015, published 31 Apr. 2015

© The Japan Society of Microgravity Applicaiton

この投稿文は次の言語で読めます: Japanese

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