Sentences with phrase «hydrophilic surfaces»

However, I'm confident that with better quality hydrophobic and hydrophilic surfaces, enough water should collect since my tests were only done with common household products.

The researchers found a layer of smooth ice had grown on the graphene, not the usual puckered layers of ice seen on water friendly or hydrophilic surfaces.

«When the AFM tip was about one nanometer away from the surface, we began to see an increase of the viscous force acting on the tip for the hydrophilic surfaces,» Riedo said.

Engineers are now mimicking the beetle's back and reproducing similar hydrophobic - hydrophilic surfaces, materials and products at the nanoscale.

We report direct determination of the structures and dynamics of interfacial water on a hydrophilic surface with atomic - scale resolution using ultrafast electron crystallography.

When water drops onto a hydrophilic surface like a windshield, on the other hand, it spreads out and runs in rivulets.

Whereas a hydrophilic surface allows droplets to spread across it at a small contact angle, a water - repelling hydrophobic surface will force droplets to bead up and form a larger angle.

A hydrophilic surface would also be preferable for condensation (reduced surface tension effect for a given mass of liquid water in a droplet), though I've never heard of that being important in the atmosphere.

Not exact matches

The beetles have a combination of hydrophobic hairs that line their legs and hydrophilic claws that grip the surface of water without getting too wet.

Since RNA is hydrophilic, or «likes water,» the molecules on the nanodiamond surface swell with excess hydration and weaken the heterogeneous dynamics of the molecules.

While silica does not participate directly in the catalysis, the surface molecular composition of the silica grains can influence its effectiveness if the chemical group is predominantly hydrophilic or hydrophobic.

The researchers found that if the silica tends to have hydrophilic silanol groups on its surface, it attracts water molecules, in effect forming a «soft barrier» of water molecules that reactants would have to overcome to somehow penetrate to proceed with the desired process or reaction.

The researchers were puzzled by a nonlinear drop in surface water diffusivity — as measured by the Overhauser dynamic nuclear polarization apparatus in the Han lab — as the chemical composition of the silica surface moved from hydrophobic to hydrophilic.

There are two different types of chemical groups that comprise glass surfaces, he said: silanol (SiOH) groups that are generally hydrophilic (water - loving), or siloxane (SiOHSi) groups that are typically water - repellant.

For example, the aquaporin protein - mediated flow of water across biological cell membranes is down to a balance between hydrophobic and hydrophilic interactions with channel surfaces.

To compare the two forms of ice growth, the researchers designed a transparent surface split into halves: one hydrophilic, one hydrophobic.

«It opens the doors to using hydrogen bonds to make surfaces hydrophilic, or attracted to water, and to (template) these surfaces for the selective absorption of other molecules possessing fundamental similarities to water,» Mavrikakis says.

«When the surfaces are hydrophilic, the water sticks to the surface and does not want to move.

This illustration shows how the different effective viscosity of water affects the force required to slide two surfaces separated by a thin layer of water when confined by a hydrophilic material or a hydrophobic material.

Molecular dynamics simulations of the solvation water around biomolecules shows a retardation of the H - bond dynamics for hydrophilic as well as hydrophobic protein surface areas.

In addition these studies allow us to obtain molecular level understanding of interactions of biomolecules with hydrophilic and hydrophobic surfaces in living systems.

(Bottom right) A drop of water applied on the surface of freshly cleaved black phosphorus shows that the material is hydrophobic, but it becomes hydrophilic when oxidized in air.

Water accumulates on the water - loving, or hydrophilic, bumps, forming droplets that eventually grow too big to stay put, then roll down the waxy surface.

Zigzag sipes increase the number of biting edges, and the hydrophilic coating absorbs a micron - thin layer of water that improves traction on icy surfaces.

By applying a voltage, the wetting properties of a hydrophobic surface can be modified and the surface becomes increasingly hydrophilic (wettable).

When a voltage is applied, the wetting properties of a hydrophobic surface can be modified and the surface becomes increasingly more hydrophilic (more wettable).

Freshly emitted soot is an example of a hydrophobic aerosol type; after chemical transformation in the atmosphere (e.g. oxidation of its surface rendering it more hygroscopic; condensation of more hydrophilic species onto the particle) it will gradually pick up water as well.