Size-Dependent Dielectric Properties of Liquid Water Clusters

Recent advances in ultrafast laser technology have spurred investigations of microheterogeneous solutions. In particular, researchers have explored details of reverse micelles (RMs), which present isolated droplets of polar solvent sequestered from a continuous nonpolar phase by a surfactant layer. This review explores recent studies utilizing a variety of ultrafast laser techniques to uncover details about structure and dynamics in various RMs. Using ultrafast vibrational spectroscopy, researchers have probed hydrogen-bond dynamics and vibrational energy relaxation in RMs. These studies have developed our understanding of reverse micellar structure, identifying varying water environments in the RMs. In a plethora of experiments employing probe molecules, researchers have explored the confined environment presented by RMs and their impact on a range of chemical reactions. These studies have shown that confinement, rather than the specific interactions with surfactants, is an important factor determining the impact of the reverse micellar environment on the chemistry.

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Ultrafast Dynamics in Reverse Micelles

Levinger

Swafford

2009

Annu. Rev. Phys. Chem.

139

157

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Dielectric Properties of Water in Butter and Water—AOT—Heptane Systems Measured Using Terahertz Time-Domain Spectroscopy

2010

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We investigate the dielectric properties of water confined in nanometer-sized inverse micelles in mixtures of water, AOT, and heptane. We show that the dielectric properties of the confined water are dependent on the water pool size and different from those of bulk water. We also discuss the dielectric properties of different vegetable oils, lard, and butter, and use these properties to deduce the dielectric properties of water in butter, which are shown to deviate significantly from the dielectric properties of bulk water.

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Size-Dependent Dielectric Properties of Liquid Water Clusters

Cited by 2 publications

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Ultrafast Dynamics in Reverse Micelles

Ultrafast Dynamics in Reverse Micelles

Dielectric Properties of Water in Butter and Water—AOT—Heptane Systems Measured Using Terahertz Time-Domain Spectroscopy

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