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We demonstrated the fabrication of complex nanostructured InP membranes with porous compact packed structure that have been cut during electrochemical etching in the same anodic process. The membranes were filled with optically transparent compounds. We considered the covering of the nanoporous film and filling the pores with polymers imprinted with nano metallic particles in order to stabilize and...
A Pt20/C80 nanocomposite was synthesized by maintaining Pt content at 20% on an activated carbon support (80%), resulting in excellent Pt nanoparticles dispersion and catalytic performance towards direct electro-oxidation of glucose and formic acid. The compositional, structural and morphological characterization of Pt20/C80 were examined using transmission electron microscopy (TEM), thermogravimetric...
We present the first demonstration of a functional Phase Change Memory (PCM) device fabricated using solution processed GeTe phase change nanoparticle. The device shows the characteristic memory behavior of crystallization and threshold switching. The cycling endurance of the device is up to 100 cycles. The cells are currently the best performing solution processed phase change material based memory...
Ag modified TiO2 loaded on artificial zeolites was prepared by sol-gel technique and photoreductive deposition method. The photocatalytic activities were investigated by the photocatalytic decolorization of methyl orange solution under visible light irradiation. The results show that Ag doping induced the enhancement of photocatalytic decolorization methyl orange and the optimal Ag/Ti mole ratio was...
In recent years, the nano-materials, which have advantages of small particle size, large specific surface area, high surface reactive activity, good catalytic activity and strong adsorptivity, have attracted considerable attention. In this paper, the glucose non-enzymatic biosensor based on nano-Au has been fabricated by self-assembly technology. Firstly, the gold colloid were prepared according to...
A novel non-lithographic, contamination-free technique for the fabrication of graphene field effect transistors (GFET) is presented. The GFET was modified with C reactive protein aptamer. Iron nanoparticles were immobilized on the GFET channel surface by using an aptamer-target protein (CRP)-aptamer sandwich method. Bistability signal was obtained by backgate voltage up/down sweeping. The bistability...
Uniform Pt nanoparticles (diameter ∼5 nm) are decorated on the TiO2 nanotube arrays (TiNT) by a two-step photo irradiation method. The resulting hybrid nanotube arrays show an excellent catalytic activity for methanol electrooxidation. The anodic current density of methanol electrooxidation reaches 21 mA/cm2 with 1 mg Pt loading (previous methods typically reach ∼10 mA/cm2). The photocatalytic properties...
Five different Nano-materials (NMs) were used for making hybrid conjugates with Protein-A (PrA), a biomolecule that binds specifically with antibodies (Abs). The choice of NMs (Gold, CdS, SrTiO3, Graphene Oxide and Polystyrene) exhibit both inorganic and organic NMs, with a wide range of electrical characteristics i.e., from metal, semiconductor to non conducting dielectric materials. The NMs-PrA...
With the development of molecular biology and genetic technology, target DNA detection and transition of genetic information are becoming increasingly significant, and electrochemical biosensor gains many concerns in direct detection of target DNA due to the advantages, i.e. simple mechanism, reliable result, low-cost process, sensitive and selective method for genetic detection. a novel biosensing...
Dye-sensitized solar cells (DSSCs) are a relatively low cost solar cell technology with an overall light-to electricity conversion efficiency of over 10%. Typically, a ∼10 μm thickness of TiO2 nanocrystalline film was used in DSSC devices for the purpose of electron collection and transportation. In this work, the TiO2 nanotube array (TNTA) covered with TiO2 nanoparticles (TNP) were successfully prepared...
In this study, we used a citrate reduction method and electrophoretic deposition (EPD) to prepare hybrid nanocrystalline TiO2/Au films and applied on the photoelectrode of dye-sensitized solar cell. The films and solar cells were investigated by field emission scanning electron microscopy (FE-SEM), energy dispersive X-ray analysis (EDX), I-V characteristics, and electrochemical impedance spectroscopy...
This paper reports intermittent microwave heating (IMH) combine with spontaneous is used to prepare highly dispersed Pt/FCNTs catalysts. At first, CNTs were functionalized by oxidation of a mixture consisting of H2SO4/H2O2 and formed oxygen containing functional groups such as -COOH, -OH, etc., by which the metal ions (Pt4+) were reduced on the sidewalls of FCNTs. X-ray diffraction (XRD) and transmission...
In this work, we report a portable microfluidic chip based on gold nanoparticle-enhanced electrochemical detection for single-bacteria diognostic. The possibility of single-bacteria detection is realized here by using electroactive molecules modified on gold nanoparticles (NPs) to detect and differentiate Staphylococcus aureus and Pseudomonas aeruginosa. The detection limit of these two electroactive...
The performance of dye-sensitized solar cells (DSSCs) is closely related to efficiency of the electron transport within TiO2-dye-electrolyte system. Electron transport can be improved by modification of the electronic structure of TiO2 electrode by doping with niobium (Nb+5). For this purpose, the DSSCs based on undoped and Nb-doped TiO2 layers were fabricated and their PV parameters and electrical...
Nickel oxide nanoparticles were synthesized by a simple aqueous solution method with carbon black powder. X-ray diffraction analysis shows that the mean size of the synthesized nickel oxide is 8.3 nm, which is much smaller than that obtained from other two methods without carbon black powder annealed at 350°C (21.1 nm) and with carbon black powder annealed at 600°C (15.6 nm). Accordingly, the specific...
The results of the research in areas of chemical sensors and tools for medical application are presented and described their promising properties, using in techniques, and potential applications. The techniques of surface manufacturing are used for sensing properties advancing, quantum dots and their potential in in-vivo diagnosis can bring nanotechnology into medical applications. Magnetic nanoparticles...
The Mn2O3-Ag nanofibers were fabricated by electrospinning PVP sol-gel solution containing Mn(NO3)2 and AgNO3, followed by calcination in air at 500 °C for 3 h. The as-prepared Mn2O3-Ag nanofibers were employed as the immobilization matrix for glucose oxidase (GOD) to construct an amperometric sensor for glucose detection in pH 7 phosphate buffer. The Mn2O3-Ag-GOD modified electrode demonstrated fast...
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