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This paper presents a CMOS biochip for DNA detection with an embedded current amplifier circuit by using self-assembly multilayer gold nanoparticles (AuNPs). The biochip is fabricated by a TSMC 0.35 mum 2P4M standard CMOS process and post-CMOS micromachining processes. On each measuring spot, there is a pair of electrodes with a gap distance of 350 nm. Through a self-assembly process between suspended...
Poly (styrene-b-butadiene-b-styrene) (SBS) triblock copolymer templates which present in-plane cylinder pattern have been prepared by solvent-induced order-disorder phase transition method. Then silver clusters have been deposited onto the SBS copolymer templates by low energy clusters beam deposition (LECBD) apparatus. The characterization of samples by AFM with tapping-mode has shown that silver...
A novel amperometric immunosensor fabricated by microelectromechanical systems (MEMS) technology with a novel modified procedure for immobilization of antibody on gold electrode has been developed. Based on MEMS technology, immunosensor with a three-microelectrode system integrated with two SU-8 micro pools was fabricated. Employing self-assembled monolayers technique, the working electrode was modified...
(FePt)1-xCux alloy nanoparticles were prepared by chemical-reduction of platinum acetylacetonate, iron acetylacetonate and copper acetylacetonate with 1,2-hexadecanediol as the reducing regent. As prepared, the particles have a disordered fcc structure with an average diameter of ca. 3nm. The addition of 4 % copper promotes the effect that the disordered fcc structure transforms to ordered fct phase,...
Nd3+ doped PbZr0.52Ti0.48O3 (PNZT) nanopowders were prepared by sol-gel methods in ethylene glycol system. Neodymium nitrate was used as Nd3+ source. The reaction mechanisms of nanopowder preparing process from the sol were discussed through using FTIR, XRD, TG-DTA, and it was proved that the heating temperature of PNZT was 50degC-100degC higher than PZT. PNZT lattice structure was characterized...
The cryogenic dielectric and mechanical properties of nanowire-Al 2O3 filled PBT/GF (glass fiber) composites are investigated by combing macro-performances testing and microstructures analysis. Compared with PBT/GF composites, the PBT/GF/Al2O 3 ternary systems present improved tensile strength as well as impact strength. The fracture surface shows a typical toughened characteristic under SEM observation,...
Nanoparticles are difficult to remove because it is much more difficult to deliver the necessary force to smaller dimensions. We investigate in this paper a new method using micro-droplet spray to remove nanoparticles from solid flat surface. With a droplet diameter between 50 and 100 mum, we evaluate the lift force and drag force acting on spherical particles. The particle diameter is less than 100...
To evaluate the biocompatibility of self-prepared Fe3O 4 magnetic nanoparticles, which has the potential application in tumor hyperthermia, MTT assay was used to evaluate the in vitro cytotoxicity; hemolysis test was carried out to estimate its blood toxicity; Fe3O4 suspended in sterile 0.9%NaCl were intraperitoneally injected into KM mouse to calculate the LD50; micronucleus (MN) were reckoned to...
It is well known that the morphology is one of the most important factors to affect the dielectric properties of polymeric nanocomposites. In this work, it is thought that the interfacial interaction between nanoparticles and polymer matrix is one of the most important factors affecting the crystalline morphology of the nanocomposites. So the effects of the surface-treatment of CaCO3 nanoparticle...
Silicon nanostructures were fabricated by a natural lithography technique, with sizes far beyond the limit of conventional, by a self-organizing gold colloidal particle monolayer as an etch mask. The silicon nanostructures with high density and uniformity in height and shape were obtained using reactive ion etching (RIE). The uniform spatial distribution of the Si nanostructures can also be obtained...
This text analyzed the nature of the cotton fiber, and on this basis developed nanometer material anti-mite and antibiotic finishing agent and finishing routine of cotton fiber knitting fabric by the valid compound of nanometer material Ag and TiO2, and developed the cotton fiber knitting fabric products with good effect on anti-mite and anti-bacteria, This product have better performance on washability,...
Temperature and size effects on behavior of nano-scale water clusters are investigated by means of molecular dynamics simulations. Hydrogen bond properties and the dipole moment of the water clusters are examined in order to explore the effects of temperature and cluster size on the behaviors of the clusters. The flexible three-centered (F3C) water potential is used to model the inter- and intra-actions...
Fe3O4 single crystal nanoparticles were prepared in zero field and in a magnetic field. Fe3O4 with well crystallinity is achieved in a magnetic field. X-ray diffraction, transmission electron microscopy, vibrating sample magnetometer and Mossbauer spectrum analysis have confirmed that the magnetic field results in increasing crystallinity, such as decrease surface spin disorder and cation vacancies...
Spindle-type α-Fe2O3 nanoparticles have been synthesized via a hydrothermal method, using Fe(NO3)3, NH4Cl and ethylene glycol as starting precursors. The resultant products were characterized by means of Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), transmission electron microscopy (TEM), high resolution transmission electron microscopy (HRTEM) and vibrating sample magnetometer...
Nanoparticles containing the infrared-to-visible up-converting phosphors (UCP) ytterbium and erbium and co-doped with sodium yttrium fluoride were synthesized with diameters ranging from 30 nm to 50 nm. These high luminescence efficient UCP beads were employed as detection labels and applied in microarrays for the detection of specific nucleic acid hybrids to identify bacteria for the first time....
High yields of multi-walled carbon nanotubes are synthesized by chemical vapor deposition of acetylene on palladium nanoparticles supported on porous SiO2. HRTEM results reveal that the carbon nanotubes have novel conical inner structure. By changing the content of palladium in the catalyst, we obtained palladium nanoparticles with different diameter distribution. It was found that the apex angles...
Magnetite (Fe3O4) nanoparticles uniformly loaded on multi-walled carbon nanotubes (MWCNTs) were synthesized by a wet chemistry method, and then carbon coated Fe3C nanoparticles supported by MWCNTs were prepared by heat-treatments subsequently in nitrogen at 600 degC and in acetylene atmosphere at 500 degC. The as-prepared nanoparticles were all single crystals with a size distribution ranging from...
The pyrolyzed polyaniline (PANI) consisted of amorphous hard carbon full of pores. Carbon nanotubes (CNTs) grew on pyrolyzed PANI substrate with the rough surface containing some pores using a low pressure chemistry vapor deposition (LPCVD) method with xylene as a carbon precursor source and Fe/SiO2 nanoparticles as catalyst. The pore extrusion and the deposited carbon particles adhesion of CNTs growing...
Advancement of the recent micro/nano technology has stimulated the renaissance of using magnetic micro/nano particles embedded in biological tissues for the target tumor hyperthermia. As is well known, mathematical solutions of bioheat transfer involved in hyperthermia treatment are indispensable for computerized optimization of hyperthermia parameters. However, estimating the level of uncertainties...
The SrAl2O4: Eu2+, Dy3+ phosphor nanoscale powders with high brightness were prepared by a nano-coating process. The resulted SrCO3@ Al2O3 core-shell precursors were characterized by transmission electron microscope (TEM), which indicates that the precursor particles have narrow size distribution. The structure and optical properties of the phosphor powders were investigated systematically by means...
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