Showing papers in "Journal of Colloid and Interface Science in 2008"

TL;DR: TEM analysis of a high-surfactant-concentration sample enables us to construct a plausible mechanism for decrease in CNT dispersion at high surfactant concentration, consistent with the UV-vis observations.

TL;DR: In this article, the authors evaluated the properties of guar gum and its influence on the surface properties, particle size, aggregation, and sedimentation of iron nanoparticles, and showed that guar is a high molecular weight polymer which is nearly neutrally charged, rendering it suitable for steric stabilization of the IR nanoparticles.

TL;DR: A review of the literature of kinetic and mechanistic studies of transition-metal nanocluster nucleation and growth is presented, and brief overviews of semiconductor nanoparticle preparations, solid-state nucleation studies-emanating from Avrami's work--and protein agglomeration mechanistic Studies are provided, as these processes are relevant, conceptually and in a general sense.

TL;DR: The low-frequency conductivity response of water-saturated packs of glass beads reflects a combination of two processes, which corresponds to the polarization of the mineral/water interface coating the surface of the grains and the Maxwell-Wagner polarization associated with accumulation of the electrical charges in the pore space of the composite medium.

TL;DR: Experimental data suggest that the adsorption of direct dyes onto CNTs involved intraparticle diffusion, but that was not the only rate-controlling step, and the values of DeltaH(0), DeltaG(0) and E all indicate that the adhesion of Direct Yellow 86 and DR224 was a physisorption process.

TL;DR: It can be concluded that the ettringite is the dominant mineral phase in terms of the state of dispersion which includes particle-particle and particle-polyelectrolyte interaction in the bulk cement system.

TL;DR: In this paper, the removal of Cd from aqueous solutions by hydroxyapatite was investigated in batch conditions at 25+/-2 degrees C. The results showed that the adsorption capacity of hydroxypatite in single-metal system ranged from 0.058 to 1.681 mmol.

TL;DR: Alkanethiols and oleic acid were found to improve air stability and oxidation resistance of thiol-capped copper nanoparticles was found to increase with the chain length of the thiol, however, excess thiol caused etching of the particles under nitrogen.

TL;DR: Basic fuchsin, a triaminotriphenylmethane dye, was removed by adsorption utilizing two waste materials--"bottom ash," a power plant waste material, and "deoiled soya," an agriculture waste product to identify whether the ongoing process is particle diffusion or film diffusion.

TL;DR: Calculations are performed to examine the effects of kappaH, flow behavior index, double layer thickness, and applied electric field on the shear stress, dynamic viscosity, velocity distribution, and average velocity/flow rate of the electroosmotic flow of power-law fluids.

TL;DR: Data as well as calculations show the dominance of phosphate in regulating the As concentrations, and the thus calibrated model is able to predict successfully the ion concentrations in the mixed 2- and 3-component systems as a function of pH and loading.

TL;DR: The developed semi-IPN hydrogel-silver nanocomposite (SHSNC) was evaluated for preliminary antibacterial applications and found to produce silver nanoparticles, ca.

TL;DR: It is demonstrated that nanobubbles can be used as cleaning agents both for the prevention of surface fouling and for defouling surfaces, as well as for the Prevention of nonspecific adsorption of proteins.

TL;DR: It was found that the Polanyi-Manes model described the adsorption process of atrazine on carbon nanotubes better than other two isotherm models, and thePolanyi adsorptive potential theory is applicable to describe the adsorsing process.

TL;DR: A novel method of preparing hydrophobic silica particles by surface functionalization using different alkyltrichlorosilanes to generate hierarchical structures for selective adsorbents and catalysts, chromatographic supports and separators in microfluidic devices is described.

TL;DR: Adsorption of cationic methylene blue and anionic orange II onto unmodified and surfactant-modified zeolites was studied using a batch equilibration method, and the results suggested that 2% sodium dodecyl benzenesulfonate (SDBS)- and 3% sodium Dodecyl sulfate (SDS)-modifiedZeolites had higher adsorption capacities for methyleneblue than the unmodified zeOLite.

TL;DR: A co-axial electrospray process was developed to encapsulate protein-based drugs in biodegradable polymeric microparticles eliminating the key problem faced by other conventional methods of protein encapsulation as discussed by the authors.

TL;DR: A new model is proposed for the effective permeability of a species in MMMs, which takes into account the presence of interfacial layer at the surface of the core filler particles.

TL;DR: The delaminated Fe-pillared clays show good thermal stability at 500 degrees C and exhibit at this temperature dramatically higher specific surface area and porosity than the starting montmorillonites, however, calcination at a higher temperature leads to the formation of nanocrystalline hematite.

TL;DR: An attempt to detail the role of citrate species in the ordered aggregation of HAP nuclei leading to the observed peanut and bundlelike microparticles morphology is presented.

TL;DR: The results suggested that Sr(II) and Eu(III) adsorptions onto oxidized MWCNTs increased with increasing pH, and decreased with increasing ionic strength, and the affinity of oxidization M WCNTs for Eu (III) was much higher than that for Sr (II).

TL;DR: The presence of a diffusion boundary layer may be responsible for the increased terminal velocity of very small CO2 bubbles, which was ascribed to the enhanced solubility of CO2 compared with the other gases examined.

TL;DR: The sorption mechanism proposed is in accordance with a ligand exchange reaction where both monodentate and bidentate complexes could exist at low surface loading level, the relative proportion of the complexes being due to both pH and concentration in solution.

TL;DR: A generalized form of the force-flux relations is proposed, which is of interest in microfluidic applications and allows one to predict the flow rate and electric current as functions of the simultaneously applied electric potential and pressure gradients.

TL;DR: This study sets out a comprehensive characterization of bulk Pd and Pd supported on activated carbon, graphite and graphitic nanofibers and shows that TEM analysis provides a valid mean particle size once it is established that the associated standard deviation is small and insensitive to additional particle counting.

TL;DR: Himic substances are a major control of REE speciation and REE fractionation patterns as well since the humic substance/metal ratio was the key parameter controlling the REE pattern shape.

TL;DR: The porevolume which has pore width was a much more effective factor than specific surface area and pore volume in PAN-based electrospun activated CNFs, which increased the capacity of hydrogen adsorption.

TL;DR: DNA base-induced differential silver nanoparticle aggregation was quantified from the peak separation of surface plasmon resonance spectroscopy and the signal intensity of surface-enhanced Raman scattering (SERS), which rationalize the extent of silver-nucleobase interactions.

TL;DR: In this study, multifunctional nanoparticles containing thermosensitive polymers grafted onto the surfaces of 6-nm monodisperse Fe(3)O(4) magnetic nanoparticles coated by silica were synthesized using reverse microemulsions and free radical polymerization, generating thermossensitive and magnetic properties of nanocomposites.

TL;DR: The results reveal the channels of as-synthesized mesoporous silica are essentially grafted with abundant amino groups and loaded with Cr(VI).