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  1. Pursuing "zero" protein adsorption of poly(carboxybetaine) from undiluted blood serum and plasma.

    Langmuir 25(19):11911 (2009) PMID 19583183

    Human blood serum and plasma pose significant challenges to blood-contacting devices and implanted materials because of their high nonspecific adsorption onto surfaces. In this work, we investigated nonspecific protein adsorption from single protein solutions and complex media such as undiluted ...
  2. Dynamic behavior of giant liposomes at desired osmotic pressures.

    Langmuir 25(19):11680 (2009) PMID 19725557

    To apply accurate and uniform osmotic pressures to liposomes, they can be formed using the spontaneous transfer method in solutions with different osmolarities. The majority of liposomes unexpectedly opened large holes (several micrometers in diameter) in response to the osmotic pressure regardl...
  3. Interaction of cationic hydrophobic surfactants at negatively charged surfaces investigated by atomic force microscopy.

    Langmuir 25(19):11509 (2009) PMID 19746942

    Atomic force microscopy was used to study the adsorption of the surfactant octadecyl trimethyl ammonium chloride (C18TAC) at a low concentration (0.03 mM) to negatively charged surfaces in water. Atomic force microscopy tips were functionalized with dimethyloctadecyl(3-tripropyl)ammonium chlorid...
  4. Photosensor based on an FET utilizing a biocomponent of photosystem I for use in imaging devices.

    Langmuir 25(19):11969 (2009) PMID 19731941

    We have investigated a photosensor that consists of a field emission transistor (FET) utilizing the biocomponent of the photosystem I (PSI) protein complex for use in an imaging device. The PSI was immobilized on a gold electrode via the self-assembling monolayer (SAM) of 3-mercapto-1-propanesul...
  5. A peculiar phase transition of plasmalogen bilayer membrane under high pressure.

    Langmuir 25(19):11265 (2009) PMID 19697955

    The bilayer phase transition of plasmalogen, monounsaturated plasmenylcholine 1-O-1'-(Z)-octadecenyl-2-oleoyl-sn-glycero-3-phosphocholine (Plg-SOPC), was examined by differential scanning calorimetry, high-pressure transmittance, and fluorescence techniques. The bilayer properties of Plg-SOPC su...
  6. Effects of capillary condensation in adhesion between rough surfaces.

    Langmuir 25(19):11727 (2009) PMID 19788224

    Experiments on the effects of humidity in adhesion between rough surfaces have shown that the adhesion energy remains constant below a critical relative humidity (RHcr) and then abruptly jumps to a higher value at RHcr before approaching its upper limit at 100% relative humidity. A model based o...
  7. Nonreactive spreading at high-temperature revisited for metal systems via molecular dynamics.

    Langmuir 25(19):11450 (2009) PMID 19702248

    The spreading for Cu and Ag droplets on top of a rigid solid surface modeling Mo is herewith considered via molecular dynamics. The dynamics of the base radius and the contact angle are recorded and fitted using the molecular-kinetic theory. A method is described to determine for liquid metals a...
  8. Phase separation at the surface of poly(ethylene oxide)-containing biodegradable poly(L-lactic acid) blends.

    Langmuir 25(19):11467 (2009) PMID 19715326 PMCID PMC3965193

    The surface chemistry and in-depth distribution of the composition of a poly(ethylene oxide) (PEO)-containing biodegradable poly(L-lactic acid) (PLLA) blend matrix system have been investigated using X-ray photoelectron spectroscopy (XPS). This study reports detailed quantitative compositional i...
  9. Gold colloids with unconventional angled shapes.

    Langmuir 25(19):11431 (2009) PMID 19534459

    We report the formation of porous gold nanoparticles with unusual, angled shapes (such as nanocheckmarks) through spontaneous transformation of tellurium sacrificial templates by gradual galvanic replacement. High-resolution electron microscopy studies of intermediate stages reveal interesting i...
  10. The definition of "critical radius" for a collection of nanoparticles undergoing Ostwald ripening.

    Langmuir 25(19):11225 (2009) PMID 19715330

    An improved, exact analysis of surface Ostwald ripening of a collection of nanoparticles is presented in an effort to redefine the critical radius involved in the kinetic models of ripening. In a collection of supported particles of different sizes, the critical radius is the size of the particl...