Hierarchical structure of soft matter induced by electrostatic interaction

2015 Fiscal Year Final Research Report

• Project/Area Number: 23244088
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Biophysics/Chemical physics
• Research Institution: High Energy Accelerator Research Organization
• Principal Investigator: Seto Hideki 大学共同利用機関法人高エネルギー加速器研究機構, 物質構造科学研究所, 教授 (60216546)
• Co-Investigator(Kenkyū-buntansha): ARAKI Takeaki 京都大学, 理学研究科, 准教授 (20332596) ; ONUKI Akira 京都大学, 名誉教授 (90112284) ; SADAKANE Koichiro 同志社大学, 生命医科学部, 助教 (50585148)
• Project Period (FY): 2011-04-01 – 2016-03-31
• Keywords: 溶媒和効果 / 中性子小角散乱 / 中性子スピンエコー法 / 拮抗的 / ラメラ構造 / オニオン構造 / ずり粘稠化 / 電気的相互作用

Outline of Final Research Achievements

Electrostatic interaction plays a dramatic role in ordering and structural formations of soft matter. We have shown an ordered lamellar structure is induced in a mixture of water and an organic solvent such as 3-methylpyridine by adding antagonistic salt composed of hydrophilic cation and hydrophobic anion. The heterogeneous distribution of cations and anions due to preferential salvation and the electrostatic interaction between these ions could be thought as the origin of the lamellar formation. Here we have investigated the effects of electrostatic interaction in soft matter such as liquids, surfactant membranes, polymers, Janus particles, liquid crystals, colloids, nano bubbles, and showed various aspects concerning the electrostatic interaction.

Free Research Field

ソフトマター物理