Materials Literature
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The vibrational properties of graphene fluoride and graphane are studied using ab initio calculations. We find that both sp3 bonded derivatives of graphene have different phonon dispersion relations and phonon densities of states as expected from the different masses associated with the attached atoms of fluorine and…
The addition of an alkali has been identified as a simple but effective approach for promoting aluminium (Al)/water (H2O) reactions. However, the use of alkaline solution causes problems with corrosion of system apparatus. We herein report a novel method that can simultaneously address the Al/H2O reaction kinetics and…
We developed a novel and ultrafast method to reduce graphene oxide (GO) with Zn powder in mild alkaline conditions under ultrasonication only for 10 min at room temperature. The as-prepared graphene nanosheets (GNs) are characterized by scanning electron microscopy, transmission electron microscopy, atomic force micro…
The investigation of the surfaces of various flower petals indicates that most of the flower petals possess hierarchical micro- and nano-structures except for a few which possess only a smooth structure. However, their surface wettabilities are different, exhibiting from super-hydrophobic, hydrophobic to super-hydroph…
The unique properties of nanodiamonds (NDs) such as chemical stability, surface modifiability and remarkable biocompatibility impart them with a great opportunity to be versatile platforms for drug delivery. In this study, chemotherapeutic doxorubicin (DOX) and cell penetrating peptide TAT were conjugated to the surfa…
Biosynthesis of metal nanoparticles employing plant extracts and thereby development of an environmentally benign process is an important branch of nanotechnology. Here, the synthesis of gold nanoparticles using Dioscorea bulbifera tuber extract (DBTE) as the reducing agent is reported. Field emission scanning electro…
Amphiphilic nanofibers composed of the hydrophilic polymer polyvinylpyrrolidone K60 (PVP) and soybean lecithin were fabricated using an electrospinning process. As a result of the templating and confinement properties of the nanofibers, phosphatidyl choline (PC) liposomes were spontaneously formed through molecular se…
A benzoxazine-bridged bis(triethoxysilane) compound (Bz-BES) has been prepared using bisphenol-A, paraformaldehyde, and 3-aminopropyltriethoxysilane as precursors. Characterization of Bz-BES has been conducted with Fourier transform infrared, nuclear magnetic resonance, molecular mass, and elemental analysis. Thermall…
The unprecedented, purely gold(I) alkynyl-diphosphine clusters 1-3 demonstrate intense room-temperature phosphorescence with maximum quantum efficiency of 92% in solution (3) and 86% in solid (2) and thermally dependent emission in the crystalline form, attributed to the crystal lattice arrangement.
The hair layer consisting of hollow fibers provides the poplar leaf with an energy efficient “cool roof” to protect it from being burned by strong light. Inspired by the hair structure, we use coaxial electro-spinning technology to achieve a highly reflective and superhydrophobic white coating towards making an eco-fr…
Biological carriers, such as the amniotic membrane and serum-derived fibrin, are currently used to deliver cultivated corneal epithelial sheets to the ocular surface. Such carriers require being transparent and allowing the diffusion of metabolites in order to maintain a healthy ocular surface. However, safety issues…
Typically, patchy systems are characterized by the formation of a small number of directional, possibly selective, bonds due to the presence of attractive regions on the surface of otherwise repulsive particles. Here, we consider a new type of particles with patterned surfaces and we refer to them as inverse patchy co…
The enhanced green fluorescence protein (EGFP) is efficiently encapsulated in silica nanoparticle by multiple covalent bonds. The silica encapsulation greatly increases EGFP's fluorescence intensity and stabilities against protease, denaturant and heat, making it a potential fluorescence probe for cellular imaging.
Preparing graphene and its derivatives on functional substrates may open enormous opportunities for exploring the intrinsic electronic properties and new functionalities of graphene. However, efforts in replacing SiO 2 have been greatly hampered by a very low sample yield of the exfoliation and related transferring me…
The D.C electrical conductivity of (polyvinylchloride‐alumina) composite has been investigated at different temperature. For that purpose, the PVC samples with Al2O3 additive prepared with different percentages (0, 20, 40, 50 and 55) wt. % and different thickness. The experimental results showed that the D.C electrica…
Elastomeric composites have been prepared using pre-treated fumed silica as a reinforcing system. The processing disadvantages of fumed silica were overcome by a novel one-pot modification method based on silanization treatment of silica particles after an ultra-high energy sonication process that breaks down the micr…
The effects of confining geometries on the self-assembly of cylinder-forming asymmetric diblock copolymers are studied using a simulated annealing technique. Morphological transitions of block copolymers confined inside two parallel flat walls, cylindrical channels, as well as spherical and ellipsoidal cavities are sy…
Hollow carbon shells and fullerene-like carbon spheres are prepared by laser ablation with toluene molecules as a carbon precursor. The liquid carbon precursor is superior to the gaseous carbon precursors conventionally used, such as C2H2, due to its safety and ease of handling. The formation mechanism of these carbon…
Covellite (CuS), digenite (Cu(1.8)S) and chalcocite (Cu(2)S) are prepared as nanoscaled hollow spheres by reaction at the liquid-to-liquid phase boundary of a w/o-microemulsion. According to electron microscopy (SEM, STEM, TEM, HRTEM) the hollow spheres exhibit an outer diameter of 32-36 nm, a wall thickness of 8-12 n…
V2O5/TiO2 and heteropoly acid promoted V2O5/TiO2 catalysts were prepared and characterized by N2 physisorption, XRPD and NH3-TPD. The influence of the calcination temperature from 400 to 700 °C on crystallinity and acidic properties was studied and compared with the activity for the selective catalytic reduction (SCR)…