Abstract Despite multiple research approaches to prevent bacterial colonization on surfaces, device‐associated infections are currently responsible for about 50% of nosocomial in Europe and significantly increase health care costs, which demands development advanced antibacterial surface coatings. Here, novel antimicrobial composite materials incorporating zinc oxide nanoparticles (ZnO NP) into biocompatible poly( N ‐isopropylacrylamide) (PNIPAAm) hydrogel layers prepared by mixing the...

Abstract A versatile and simple method is presented for the rapid fabrication of close‐packed colloidal 2D crystals with large domain sizes by floating redeposition monolayers at air/water interface. detailed analysis particle surface transformation packing during individual steps monolayer process has been conducted. It was found that quality depends on parameters like distribution initial substrate, subphase pH, addition surfactants. The could be transferred stacked onto many substrate...

Abstract A fullerene derivative 1 of benzo[18]crown‐6 was obtained by Diels‐Alder addition fullerene[60](C 60 ) to the ortho ‐quinodimethane prepared in situ from 4,5‐bis(bromomethyl)benzo[18]crown‐6 ( 3 with Bu 4 NI toluene. Extraction experiments show that complexation K + ions strongly increases solubility protic solvents like MeOH. Using Langmuir‐Blodgett techniques, monolayers highly amphiphilic fullerene‐derived crown ether and its ion complex were prepared. An X‐ray crystal structure...

Abstract Colloidal monolayers with high order and increased complexity beyond plain hexagonal packing geometries are useful for 2D templating of surface nanostructures lithographic applications. Here, binary colloidal featuring a close‐packed monolayer large spheres (L) superlattice small particles (S) prepared in single step using Langmuir trough. Adjustment the stoichiometry two particle types at air–water interface leads to degree control over occupation interstitial sites layer by...

Hydrogel materials consisting of water-swollen polymer networks exhibit a large number specific properties highly attractive for variety optical biosensor applications. This profile embraces the aqueous swelling medium as basis biocompatibility, non-fouling behavior, and being not cell toxic, while providing high quality transparency. The present review focuses on some most interesting aspects surface-attached hydrogel films active binding matrices in biosensors based surface plasmon...

Abstract A pioneering method is reported for creating thermoresponsive biofunctional hydrogel microstructures using maskless multiphoton lithography. Departing from conventional multiphoton‐triggered polymerization‐based techniques, this approach relies on simultaneous photocrosslinking and attachment of already pre‐synthesized polymer chains onto solid substrates. The allows improving control over network characteristics enables facile integration additional functionalities through...

Layer systems composed of polydiacetylene lipids are known to undergo an irreversible colorimetric transition from blue red upon exposure external trigger (e.g., heat, pH change, specific ligand−target interaction). These optical transitions offer numerous possibilities toward the development molecule-based sensory materials. Polymerization diacetylene usually occurs only in a highly ordered phase as topochemical reaction, if diacetylenic units packed optimal orientation. A novel system...

Using a rabbit model, the involvement of L‐arginine/nitric oxide pathway in penile erection was investigated. The mean basal intracavernous pressure 21 cm H 2 O. Cavernous nerve stimulation (4–8 V, 20–30 Hz) increased to approximately 130 This response highly reproducible and usually associated with full erection. increase could be quantified terms of: (1) slope initial, ascending part increase; (2) ΔP, which defined as maximal obtained by minus before stimulation; (3) T 90 , time reach per...

The influence of various experimental parameters on the vertical deposition and structure formation colloidal crystals chemically patterned surfaces, with hydrophilic hydrophobic areas, was investigated. pattern dimensions range from about 4 to 400 μm, which is much larger than individual particle size (255 nm), control microscopic crystal shape rather influencing lattice geometry (as achieved in epitaxy). resolution selectivity were tested by varying concentration suspension, substrate...

The structural features and swelling properties of responsive hydrogel films based on poly(N-isopropylacrylamide) copolymers with a photo-cross-linkable benzophenone unit were investigated by surface plasmon resonance, optical waveguide mode spectroscopy, atomic force microscopy. temperature-dependent behavior was studied respect to the chemical composition polymers containing either sodium methacrylate or methacrylic acid moieties. In system, refractive index gradient found that not present...

For films of C60 or C70 and azacrown compounds with long side chains, the question immediately arises whether fullerene molecules are positioned in, between, on baskets (see A–C). Surface pressure-area diagrams, UV/VIS spectroscopic data, preliminary results atomic force microscopy measurements consistent model A.

We report on the observation of two hypersonic phononic gaps different nature in three-dimensional colloidal films nanospheres using Brillouin light scattering. One is a Bragg gap occurring at edge first zone along high-symmetry crystal direction. The other hybridization crystalline and amorphous films, originating from interaction band quadrupole particle eigenmodes with acoustic effective-medium band, its frequency position compares well computed lowest eigenfrequency. Structural disorder...

A new biosensor based on surface plasmon-enhanced fluorescence spectroscopy (SPFS), which employs long-range plasmons (LRSP) and a photo-cross-linkable carboxymethyl dextran (PCDM) hydrogel binding matrix, is reported. LRSPs are plasmon modes that propagate along thin metallic film with orders of magnitude lower damping compared to regular plasmons. Therefore, their excitation provides strong enhancement the intensity electromagnetic field greatly increased signal measured upon...

We report for the first time preparation of multilayered trimodal colloid crystals (tCC) and their corresponding binary inverse opals (bIO), which present complex hierarchical structures that may have significant potential in photonics, phononics, separations, catalysis, among others. A colloidal mixture 465 nm polystyrene (PS), 84 poly(methyl methacrylate) (PMMA), 6 silica particles suspension was transferred onto a glass substrate self-assembled into highly ordered crystal during vertical...

We performed fluorescence correlation spectroscopy measurements to assess the long-time self-diffusion of a variety spherical tracer particles in periodic porous nanostructures. Inverse opal structures with variable cavity sizes and openings nanometer domain were employed as model system. obtained both exponent scaling relation between mean-square displacement time slow-down factors due confinement for number particle confining characteristics. In addition, we carried out Brownian dynamics...

The use of thermoresponsive poly(

Novel electrospun materials for bone tissue engineering were obtained by blending biodegradable polyhydroxybutyrate (PHB) or valerate (PHBV) with the anionic sulfated polysaccharide κ-carrageenan (κ-CG) in varying ratios. In both systems, two components phase separated as shown FTIR, DSC and TGA. According to contact angle data, κ-CG was localized preferentially at fiber surface PHBV/κ-CG blends contrast PHB/κ-CG, where biopolymer mostly found within fiber. neat polyester fibers, led...

As a growing public health concern, the worldwide spread of antimicrobial resistance urges development new therapies. Antibacterial photodynamic therapy (a-PDT) may be an alternative to conventional antibiotic therapy. Herein we report synthesis and characterization seven original reactive oxygen species (ROS)-producing ruthenium(II) polypyridyl complexes. These are part collection 17 derivatives varying in terms nature substituent(s), molecular symmetry, electrical charge, counterions. They...

The site-selective assembly of colloidal polymer particles onto laterally patterned silane layers was studied as a model system for the object process at mesoscale dimensions. structured monolayers on silicon oxide substrates were fabricated by combination liquid- and gas-phase deposition different trialkoxysilanes with photolithographic patterning technique. By using this method various types surface functionalizations such regions amino functions next to areas bare silica or positively...