Effect of Interaction on the Formation of Memories in Paste

Autor:	Matsuo, Yousuke, Nakahara, Akio
Rok vydání:	2011
Předmět:	Condensed Matter - Soft Condensed Matter
Zdroj:	Journal of the Physical Society of Japan 81 (2012) 024801
Druh dokumentu:	Working Paper
DOI:	10.1143/JPSJ.81.024801
Popis:	A densely packed colloidal suspension with plasticity, called paste, is known to remember directions of vibration and flow. These memories in paste can be visualized by the morphology of desiccation crack patterns. Here, we find that paste made of charged colloidal particles cannot remember flow direction. If we add sodium chloride into such paste to screen the Coulombic repulsive interaction between particles, the paste comes to remember flow direction. That is, one drop of salt water changes memory effect in the paste and thereby we can tune the morphology of desiccation crack patterns more precisely. Comment: 10 pages, 11 figures, Title changed
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1101.0953 Zobrazit plný text záznamu View this record from Arxiv