The functionality of tissue engineering scaffolds can be enhanced by localized delivery of appropriate biological macromolecules incorporated within biodegradable nanoparticles. In this research, chitosan/58 S-bioactive glass (58 S-BG) containing poly(lactic-co-glycolic) acid (PLGA) nanoparticles has been prepared and then characterized. The effects of further addition of 58 S-BG on the structu...

Abs t rac t We have s tud ied cha rac te r i za t ion of micromechanical cleavage monolayer molybdenum disulfide (MoS2) deposited on SiO2/Si and glass substrates. Spherical gold (Au) nanoparticles were anchored on top of monolayer MoS2 film. Direct reflection spectra were measured, which infers significant improvement of total average absorption of monolayer MoS2 in Vis-NIR range of 400–800 nm ...

One- and two-dimensional diffractive optical devices have been fabricated by light-assisted trapping and patterning of nanoparticles. The method is based on the dielectrophoretic forces appearing in the vicinity of a photovoltaic crystal, such as Fe:LiNbO3, during or after illumination. By illumination with the appropriate light distribution, the nanoparticles are organized along patterns desig...

An experimental study was performed to investigate the potential use of highly charged, spherical nanoparticles to control the forces between spherical microparticles, with the aim of developing novel methods for reversibly controlling the stability of a colloidal dispersion. A specific focus of the project was to determine the degree to which the nanoparticles strongly adsorb to the microparti...

Imparting ductility to glass effectively counters brittleness caused by stress concentration. Spark plasma sintering of silica (SiO2) nanopowder and a silver nitrate mixture successfully dispersed (Ag) nanoparticles into SiO2 matrix. The Ag-precipitated showed crack bridging during propagation softening owing the imparted Ag. Compared with glass, exhibited fewer cone cracks suppressed radial pr...

Polymer-nanoparticle composites (PNCs) play an increasing role in technology. Inorganic or organic nanoparticles are usually incorporated into a polymer matrix to improve material properties. Polyurea is a spontaneously occurring PNC, exhibiting a phase segregated structure with hard nanodomains embedded in a soft (elastically compliant) matrix. This system shows two glass transitions at Tg1 an...

We here propose a simple and fast hands-on activity requiring limited equipment, to introduce students of various levels (bachelor’s or high school) backgrounds (from science arts) the chemistry color. The different colors stained glass are replicated through deposition, on ordinary slides, silica coatings colored by addition metal ions nanoparticles. A sol is used as matrix embed ions, followe...

Polymer-nanoparticle composites play a vital role in ongoing materials development. The behavior of the glass transition of these materials is important for their processing and applications, and also represents a problem of fundamental physical interest. Changes of the polymer glass transition temperature Tg due to nanoparticles have been fairly well catalogued, but the breadth of the transiti...