Topics

Temporally Anticorrelated Subdiffusion in Water Nanofilms on Silica Suggests Near-Surface Viscoelasticity.

07:00 EST 14th January 2020 | BioPortfolio

Summary of "Temporally Anticorrelated Subdiffusion in Water Nanofilms on Silica Suggests Near-Surface Viscoelasticity."

We used single-molecule tracking to probe the local rheology of interfacial water. Fluorescent rhodamine molecules were tracked on silica surfaces as a function of ambient relative humidity, which controlled the thickness of condensed water nanofilms. At low humidity, the molecules exhibited confined diffusion in the vicinity of isolated adsorption sites characterized by a broad distribution of binding stiffness constants; subsequent chemical or physical surface passivation selectively eliminated stiffer binding sites. At increased humidity, molecularly thin water films condensed, permitting near-surface transport of rhodamine molecules. Motion was subdiffusive, with an anomalous exponent increasing with the nanofilm thickness. Molecular trajectories were temporally anticorrelated, ergodic, but also featured transient binding and intermittent diffusion. Statistical modeling demonstrated that this complex motion in water nanofilms had the characteristics of fractional Brownian motion combined with a continuous time random walk. This was consistent with diffusion within viscoelastic nanofilms, suggesting persistent molecular structuring in the vicinity of the silica surface.

Affiliation

Journal Details

This article was published in the following journal.

Name: ACS nano
ISSN: 1936-086X
Pages:

Links

DeepDyve research library

PubMed Articles [10220 Associated PubMed Articles listed on BioPortfolio]

Effective removal of silica and sulfide from oil sands thermal in-situ produced water by electrocoagulation.

Effective removal of silica and sulfide from oil sands thermal in-situ produced water can reduce corrosion and scaling of steam generators, enhancing water recycling and reuse in the industry. The rem...

Study on ablation threshold of fused silica by liquid-assisted femtosecond laser processing.

The femtosecond laser machining of fused silica in air and liquids is studied. The ablation threshold of fused silica is reduced from 2.22 to ${1.02}\;{{\rm J/cm}^2}$1.02J/cm. In order to explore the ...

Hydrophobic Surface Modified HfO2 Antireflective coatings.

A multifunctional antireflective thin film is always a prerequisite for growing high-tech applications. Herein we proposed a surface modification technique to transform the hydrophilic behaviour of Hf...

Removal of sulfonamide antibiotics from water by high-silica ZSM-5.

Adsorption characteristics of high-silica zeolites (HSZSM-5) for two selected sulfonamide antibiotics (SAs) (sulfamethoxazole and sulfadiazine) were investigated. The SAs were almost completely (>90%)...

Large Area Self-Assembled Ultrathin Polyimine Nanofilms Formed at the Liquid-Liquid Interface Used for Molecular Separation.

Separation membranes with higher molecular weight cut-offs are needed to separate ions and small molecules from a mixed feed. The molecular sieving phenomenon can be utilized to separate smaller speci...

Clinical Trials [2084 Associated Clinical Trials listed on BioPortfolio]

A Study to Investigate the Stain and Plaque Removal Capability of Two Experimental Potassium Nitrate Dentifrices

The purpose of this study is to determine whether spherical silica can achieve similar or greater extrinsic dental stain and plaque removal, in comparison to dentifrices containing higher ...

Safety Evaluation of Porous Silica in Men

The aim of the present study was to determine whether oral dosing, up to 9 grams/day, of porous silica administered as a food additive can be used safely in normal weight and obese male hu...

Efficacy of a Commercial Dentifrice Containing 10% High Cleaning Silica Base for Tooth Whitening

The objective of the present study was to compare the effects of a commercially available dentifrice containing 10% high cleaning silica base, versus a control dentifrice, containing norma...

Temporally Feathered Radiation Therapy (TFRT) for Head and Neck Squamous Cell Carcinoma

This study will evaluate the feasibility of using more advanced IMRT (intensity modulated radiation therapy) techniques. This new technique is termed Temporally Feathered Radiation Therapy...

Comparison Between Bioactive Silica Graft Plus Platelet Rich Fibrin and Only Platelet Rich Fibrin Graft in Intrabony Defects With Diabetes

Various regenerative procedures used for the treatment of intabony defects.The Aim of this study is to compare the treatment outcome of bioactive silica graft with platelet rich fibrin Vs ...

Medical and Biotech [MESH] Definitions

A non-crystalline form of silicon oxide that has absorptive properties. It is commonly used as a desiccating agent and as a stationary phase for CHROMATOGRAPHY. The fully hydrated form of silica gel has distinct properties and is referred to as SILICIC ACID.

Any of the numerous types of clay which contain varying proportions of Al2O3 and SiO2. They are made synthetically by heating aluminum fluoride at 1000-2000 degrees C with silica and water vapor. (From Hawley's Condensed Chemical Dictionary, 11th ed)

The flow of water in enviromental bodies of water such as rivers, oceans, water supplies, aquariums, etc. It includes currents, tides, and waves.

Environmental reservoirs of water related to natural WATER CYCLE by which water is obtained for various purposes. This includes but is not limited to watersheds, aquifers and springs.

Substances or organisms which pollute the water or bodies of water. Use for water pollutants in general or those for which there is no specific heading.

Quick Search


DeepDyve research library

Searches Linking to this Article