adsorption – Page 6 – TechConnect Briefs

Scanning Tunneling Microscopy Images of Au Adsorbed on GaAs(111)B surface

Yi H., Kratzer P., Hilner E., Mikkelsen A., KISTI, KR

We have studied the GaAs(111)B surface with Au deposited either homogeneously or as nanoparticles, and found the presence of Au in either form to give rise to a $(sqrt{3} !times! sqrt{3} )$ Au-induced surface reconstruction. [...]

Adsorption of glycine and phenylalanine in H-ZSM-5 zeolite: an embedded QM/MM study

Boekfa B., Sirijaraensre J., Limtrakul J., Limtrakul P., Pantu P., Limtrakul J., Limtrakul P., Kasetsart University, TH

Zeolites are crystalline aluminosilicate microporous materials whose pore diameters are in the range of 2 to 10 Å. Zeolites have numerous important applications in catalysis, adsorption, drug delivery, and chemical separations. Recently, zeolites have received [...]

Testing the validity of small angle and adsorption-based characterization techniques by atomic-scale simulation

Pellenq R.J.-M., Coasne B., Centre de Recherche en Matière Condensée et Nanosciences, CNRS, FR

This work aims at testing small angle scattering and adsorption/desorption-based characterization techniques routinely used for nanoporous material characterization (specific surface and pore size distribution measurements). For that purpose, we report Grand Canonical Monte Carlo results [...]

Molecular Simulation Studies on Adsorption of Mercuric Chloride

Kotdawala R.R., Kazantzis N., Thompson R.W., Worcester Polytechnic Institute, US

The need to develop technologies capable of achieving high removal efficiencies for mercury chloride emission control led many researchers to focus their attention on the evaluation of the adsorption capacity and selectivity shown by different [...]

Composite Carbon Nanostructures as Promising Carriers for Gaz Analysis

Majoli L., Evstratov A., Guillot J.-M., Rouvière A., Baussand P., Ales High Mining School, FR

In the framework of the project ACI NPD-37 “NSC-Env” supported by the French Ministry of Research and New Technologies, a kind of nanostructured carbon based composite materials was developed in order to propose new efficient [...]

Simplified Crossover Droplet Model for Adsorption of Critical and Supercritical Fluids in Slit Nano-Pores

Kiselev S.B., Ely J.F., Colorado School of Mines, US

We present a a simplified crossover droplet (SCD) model for the excess adsorption of pure fluids at a flat solid-liquid interface in the volume and slit nano pores, which reproduces scaling behavior of the excess [...]

Transition Mechanisms and Phases of Hexane Physisorbed on Graphite

Pint C.L., Roth M.W., Wexler C., University of Northern Iowa, US

We study the transition mechanisms in submonolayer, monolayer, and supermonolayer hexane adsorbed onto graphite, and find that the driving mechanism for the nematic (liquid crystal) phase observed is out-of-plane tilting caused by molecular in-plane rolling, [...]

Gold Removal and Recovery using Mesoporous Silica Adsorbents

Lam K.F., Yeung K.L., McKay G., Hong Kong University of Science and Technology, CN

This work investigates the selective removal of dissolved metal ions from aqueous solutions using MCM-41 adsorbents grafted with different chemical moieties. A systematic study was conducted to understand the adsorption mechanisms, in order to better [...]

Multiscale Modeling of Nanoflows

Drazer G., Acrivos A., Khusid B., Koplik J., New Jersey Institute of Technology, US

Using molecular dynamics simulations, we identified in previous work a new adsorption phenomenon in which, for poorly wetting fluids, a suspended particle, initially moving along the center of the nanochannel, is adsorbed onto the tube [...]

Self-Assembly of Tetraazamacrocyclic Compounds on Single-Walled Carbon Nanotubes: Experimental and Theoretical Studies

Basiuk E.V., Basiuk V.A., Basiuk E.V., Basiuk V.A., Rybak-Akimova E.V., Acosta-Najarro D., Puente-Lee I., Saniger J.M., Universidad Nacional Autonoma de Mexico, MX

All the existing methods of chemical modification of carbon nanotubes (CNTs) can be divided in two groups, depending on whether functionalizing moieties are introduced onto the nanotube tips or sidewalls. The latter approach offers wider [...]