Sum frequency generation (SFG) vibrational spectroscopy has been used to characterize the interfacial structure of a series of model peptides at the hydrophobic polystyrene–buffer interface. The peptides contain two types of amino acids, one hydrophobic (X) and one hydrophilic (Y). Their sequences are Ac-XYYXXYXXYYXXYX-NH2 (XY14) and Ac-XYXYXYX-NH2 (XY7), respectively, where the X and Y combina...

Bacteriorhodo sin is an integral membrane light-driven proton pump from ~aLbucter ium ~ o b i u m . It consists of seven transmembrane helices, surrounding a central proton translocation channel, in a 1:l complex with a retinal chromophore. The structure of the transmembrane helices has been resolved by high-resolution electron cryo-microscopy [ 11. We have investigated the amphipathic nature o...

The presence of nanobubbles-as imaged with tapping-mode atomic force microscopy-is controlled using nanopatterned surfaces possessing repeating patterns of polystyrene (hydrophobic domains) and poly(methyl methacrylate) (hydrophilic domains). For nanobubbles to be present, we find that, in addition to controlling the degree of surface hydrophobicity, it is important for the spatial dimensions o...

block copolymer nano-micelles are especially important in cancer treatment because of their fine dimensions. in this article, three systems of amphiphilic copolymers with similar lengths and different ratios of the hydrophobic and hydrophilic chains are studied using implicit-solvent coarse-grained molecular dynamics simulations. the factor fphil is defined as the ratio of the number of hydroph...

The proteolytic enzymes pronase, trypsin, and chymotrypsin and the surfactant Triton X-100 inhibited attachment of Vibrio proteolytica to the hydrophobic substratum polystyrene by >97%. These treatments had no effect on attachment to hydrophilic substrata such as glass or tissue culture dishes. Both pronase and Triton X-100 effected the removal of previously attached cells from polystyrene but ...

In this paper, the fundamental features and mechanism of droplet migration on hydrophobic–hydrophilic hybrid surfaces are investigated using the lattice Boltzmann method. The hybrid surfaces are textured with pillars, which consist of hydrophobic side walls and hydrophilic tops. First, we study the cases with wettability differences between the sides and the tops of the pillars. It is found tha...

Fast transient microboiling has been characterized on modified gold microheaters using a novel laser strobe microscopy technique. Microheater surfaces of different hydrophobicity were prepared using self-assembled monolayers of hexadecane thiol (hydrophobic) and 16-mercaptohexadecanol (hydrophilic) as well as the naturally hydrophilic bare gold surface. The microheater was immersed in a pool of...

Interpenetrating polymer networks (IPN) were formed involving hydrophobic polybutyl acrylate (PBA) and hydrophilic poly hydroxyethyl acrylate (PHEA). PBA prepolymer was first formed in presence of ferric oxide nanoparticles (

Interpenetrating polymer networks (IPN) were formed involving hydrophobic polybutyl acrylate (PBA) and hydrophilic poly hydroxyethyl acrylate (PHEA). PBA prepolymer was first formed in presence of ferric oxide nanoparticles (

Lignocellulosic natural fibres are hydrophilic, while many matrix systems for composites hydrophobic. The achievement of good mechanical properties fibre-reinforced polymer (NFRP) relies on fibre-to-matrix bonding at the interface. reinforcement is normally coated with an amphiphilic coupling agent to promote a strong A novel alternative approach dissolve in hardener resin before creating stoic...