| Budget Amount *help |
¥15,990,000 (Direct Cost: ¥12,300,000、Indirect Cost: ¥3,690,000)
Fiscal Year 2023: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2022: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2021: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2020: ¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
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| Outline of Final Research Achievements |
In order to understand and quantify the driving forces for micellization of surfactant molecules in aqueous solutions, we undertook a theoretical investigation based on a hierarchical approach. First, we developed an efficient method for calculating the solvation free energy of amphiphilic molecules. Second, we studied concentration fluctuations in aqueous solutions of alcohols and the effect of salt on the fluctuations and found that there is nanoscale heterogeneity in an aqueous solution of propanol and the time scale of the structural fluctuations is a few tens of nanoseconds. Third, in an effort to understand the size dependence of the hydrophobic interaction, we found that the osmotic second virial coefficient of a hydrophobic solute is proportional to the 6th power of the solute diameter.
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