Interactions between mineral surfaces and dissolved species: From monovalent ions to complex organic molecules

from historical facts to geo-political realities: relation between turkey and armenia ( 1915 – 2010)

armenias geopolitics and its historical experience have had a determining impact on the character of its foreign policy .present-day armenia is a small, landlocked country with _11,620 square miles area armenias landlocked nature makes it dependent on the benevolence of its neighbors for access to the outside world a fact that gives it a sense of isolation and vulnerability. as it was indic...

DNA Compaction and Charge Inversion Induced by Organic Monovalent Ions

DNA condensation and charge inversion usually occur in solutions of multivalent counterions. In the present study, we show that the organic monovalent ions of tetraphenyl chloride arsenic (Ph4As) can induce DNA compaction and even invert its electrophoretic mobility by single molecular methods. The morphology of condensed DNA was directly observed by atomic force microscopy (AFM) in the presenc...

Organic molecules on inorganic surfaces.

Ejection of neutral molecules from ion-bombarded organic surfaces.

Time-of-flight distributions of neutral molecules ejected from various organic surfaces have been measured subsequent to 8 keV Ar+ and H2+ ion bombardment. The distributions show that depending on the physical and chemical nature of the substrate, the neutral molecules have strikingly different desorption profiles. For C6H6/Ag¿111¿, at low coverage the C6H6 molecules eject with energies in the ...

eScience methods for the combinatorial chemistry problem of adsorption of pollutant organic molecules on mineral surfaces

We study a set of environmentally-relevant pollutant molecules adsorbing on a pyrophyllite surface. The set of calculations needed for this study exemplify a short and fairly simple workflow; we make use of the existing eMinerals minigrid, and produce our own very simple self-written workflow management tools to govern the process. We show that in the presence of a robust minigrid it is easy to...