title: Characterization of Adsorbed Molecular Water on the Surface of a Stretched Polytetrafluoroethylene Tape Analyzed by (1)H NMR.
abstract: A single molecule often exhibits a largely different material character from a bulk matter. Although a perfluoroalkyl (Rf) compound is a representative one, many interests have mostly been devoted to the bulk character only thus far, leaving the single molecular character unclear. Recently, a new theoretical framework, stratified dipole-arrays (SDA) theory, has appeared for comprehensive understanding of Rf compounds in terms of both single and bulk systems. On this theory, a mechanically stretched polytetrafluoroethylene (PTFE) is expected to exhibit a single-molecular character having dipole-driven properties, which should attract molecular water. In the present study, a stretched PTFE tape is revealed to attract molecular water (not water droplet) in fact, and the adsorbed water molecules are highly restricted in motion by the dipole-dipole interaction studied by using (1)H NMR, which agrees with the prediction by the SDA theory.
authors: Institute for Chemical Research, Kyoto University , Uji, Kyoto 611-0011, Japan.
authors: Chihiro
authors: C
authors: Wakai
authors: Institute for Chemical Research, Kyoto University , Uji, Kyoto 611-0011, Japan.
authors: Takafumi
authors: T
authors: Shimoaka
authors: Institute for Chemical Research, Kyoto University , Uji, Kyoto 611-0011, Japan.
authors: Takeshi
authors: T
authors: Hasegawa