Materials Literature
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We investigated whether a silver coating on an anodic oxidized titania (TiO2) nanotube surface would be useful for preventing infections in dental implants. We used a magnetron sputtering process to deposit Ag nanoparticles onto a TiO2 surface. We studied different sputtering input power densities and maintained other…
The clinical applications of therapeutic siRNA remain as a challenge due to the lack of efficient delivery system. In the present study, hyaluronic acid-siRNA conjugate (HA-SS-siRNA)/reducible polyethylenimine (BPEI1.2k-SS) complexes were developed to efficiently deliver the siRNA to HA receptor abundant region with t…
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Two aspects of nanonickel particle injection into porous media were studied: stabilization and transportation. Three different surfactants [sodium dodecylbenzenesulfonate (SDBS), cetyltrimethylammonium bromide (CTAB), and Tergitol Np-9] and xanthan gum polymer were tested for stabilization of the nanoparticles. In the…
Lignin is the only nature renewable resource which can provide large quantities of aromatic compounds. In the work, transformation of lignin into benzene, toluene, and xylenes (BTX) was investigated over the HZSM-5, HY, and MCM-22 catalysts, and the HZSM-5 catalyst showed the highest carbon yield of BTX. The reaction…
γ-Al2O3 supported Ni-Mn bimetallic catalysts for CO2 reforming of methane were prepared by impregnation method. The reforming reactions were conducted at 500–700 °C and atmospheric pressure using CO2/CH4/N2 with feed ratio of 17/17/2, at total flow rate of 36 mL/min. The catalytic performance was assessed through CH4…
Aluminium oxide (Al2O3) thin films were deposited on Si (100) substrates at an optimized oxygen partial pressure of 3 x 10(-3) mbar at room temperature by pulsed laser deposition (PLD). The films were characterized by high temperature X-ray diffraction (HTXRD), field emission scanning electron microscopy (FESEM) and a…
Hydrogels have been widely investigated as depots and carriers for drug delivery. For example, hydrogels have been successfully used to encapsulate a variety of pharmaceuticals, such as peptides and proteins. Recently, carbon material/hydrogel hybrid systems have been of interest as new hydrogel systems because of the…
Palladium nanoparticles microencapsulated by cellulose (CelMcPd 0 ) were, for the first time, developed via reduction of Pd(OAc) 2 or PdCl 2 in a cellulosic ionic liquid solvent, in which the Pd II species were synchronously reduced to Pd 0 nanoparticles in situ with the ionic liquid itself or with NaBH 4, followed by…
Two new star-shaped oligofluorenes, HFB-diF-Dpa and HFB-terF-Dpa, with a hexakis(fluoren-2-yl)benzene core and six diphenylamine end-cappers were designed and synthesized. The peripheral diphenylamine groups enhance the HOMO energy levels of the materials, and the bulky star-shaped structures efficiently suppress the…
Aerogels are solids with high porosity (<100 nm) and hence possess extremely low density (∼0.003 g/cm3) and very low conductivity (∼10 mW/mK). In recent years, aerogels have attracted more and more attention due to their surprising properties and their existing and potential applications in wide range of technological…
This paper adumbrates a novel tunable metamaterial consisting of triangular split ring resonator (TSRR) and wire strip (WS) at THz frequency. Ansoft high frequency structure simulator (HFSS) has been used to design and analyse the metamaterial having Rogers RT/duroid 5870 ( εr = 2.33) and FR4 ( εr = 4.4) as substrate…
The p-type (Bi0.2Sb0.8)2Te3 powders were mechanically alloyed and hot pressed at 500 degrees C for 30 minutes with dispersion of Si nanopowders up to 3 vol%. The thermal conductivity of the (Bi0.2Sb0.8)2Te3 nanocomposite was substantially reduced with dispersion of 0.3-3 vol% Si nanopowders due to the enhanced phonon…
Cellulose and one dimensional nano-material composite has been investigated for various industrial applications due to their optical, mechanical and electrical properties. In present investigation, cellulose/silica and silica-gold hybrid biomaterials were prepared by sol-gel covalent cross-linking process. The tetraet…
Recently, nanogels have been extensively studied as a means to deliver bioactive molecules such as drugs, proteins, and vaccines due to their versatile and unique properties such as high water absorption, easy production, surface modification, high stability and biocompatibility. Various materials including natural po…
The aim of this study is to assess the suitability of selected commercial ceramic crucibles for the investment casting of Ti6Al4V and NiTi alloys for jewellery purposes. A commercial vacuum tilt casting machine and a centrifugal casting machine were employed to cast the alloys in cold copper moulds or in refractory in…
A low temperature sputter deposition process is adopted to fabricate nanocrystalline ZnO thin films on plastic (polyethylene terepthalate) substrate. Very good crystalline films are synthesized at a substrate temperature around 120 degrees C. Structural and microstructural analyses confirm the proper phase formation o…
The synthesis of nanoscale CaB6 powder via the low temperature chemical reaction of Calcium chloride (CaCl2) with Sodium Borohyride (NaBH4) in vacuum has been investigated in this study. The reaction temperature was determined by differential scanning calorimetry and thermogravimetric analysis (DSC and TG). Crystalliz…
The purpose of this study was to investigate nanotube nucleation phenomena on the Ti-25Ta-xZr alloys for implant materials, using an anodic titanium oxide (ATO) technique. Ti-25Ta-(0 wt.%-15 wt.%) Zr alloys were prepared using a vacuum arc-melting furnace. The Ti-25Ta-xZr alloys were then homogenized for 12 hr at 1000…
Thick film growth of Fe-Si-Cr/poly-tetra-fluoro-ethylene (PTFE) composite films on polyethylene terephthalate (PET) sheets was investigated by aerosol deposition (AD) as a magnetic absorber for near field communication. The Fe-Si-Cr flakes were crushed to micro flakes smaller than 1 μm after the deposition, and formed…