Ion fluctuations within an aqueous microdroplet in an apolar medium

Yu Jane Sheng, Heng Kwong Tsao

Research output: Contribution to journalArticlepeer-review

14 Scopus citations


The density fluctuation of counterions within an aqueous droplet was investigated using fluctuation-dissipation theorem. The incorporation of charged proteins in the microdroplets alters the percolation threshold of ion fluctuations. The results show that the ion fluctuation grows and becomes saturated with the increase in counterion concentration and the mean-square dipole moment is proportional to the polarizability of the microdroplets.

Original languageEnglish
Article number185501
Pages (from-to)1855011-1855014
Number of pages4
JournalPhysical Review Letters
Issue number18
StatePublished - 29 Oct 2001


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