Surface Tention of Synthetic Mica Melts

PDMS melts on mica studied by confocal Raman scattering.

We report surprising surface-induced torsional alignment of polydimethylsiloxane (PDMS) chains in contact with the muscovite (001) mica surface with and without confinement. The alignment was measured by polarized confocal Raman spectroscopy over diffraction-limit circular spots with approximately 0.3 microm diameter. Our discussion here focuses on the intense symmetric methyl-group vibration c...

Mighty mica: synthetic clay remediates radium.

Dipartimento di Medicina, Clinica e delle Patologie emergenti, and Dipartimento di Biopatologia e Metologie Biomediche, Università degli Studi di Palermo, Via del Vespro 141, 90127 Palermo, Italy; Dipartamento di Medicina Clinica e Sperimentale, Università degli Studi di Verona, Verona, Italy; Dipartimento di Anatomia Umana, Università degli Studi di Messina, Messina, Italy; Direzione Medica Gl...

Rehabilitation of at tention functions

Attention is what allows one stream of information from the internal or external environment to be selected over others and therefore pervades almost any thought or action we take in our daily lives. It is little wonder then that defi cient attention, a common feature of many disorders of the brain (see Manohar, Bonnelle and Hunter (chapter 34), this volume; Vallar and Bolognini (chapter 33), t...

Surface Micellization Patterns of Quaternary Ammonium Surfactants on Mica

The microscopic equilibrium structures of adsorbed films of quaternary ammonium surfactants on mica have been investigated by noncontact atomic force microscopy imaging as a function of alkyl chain length and headgroup structure. Spherical and cylindrical surface micelles were observed; these were found to be related to bulk solution self-assembly and the surfactant packing parameter, v/a0lc. S...

Graphene adhesion on mica: Role of surface morphology