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The crystallization behavior of amorphous Ni-P nanoparticles produced by liquid pulsed-discharge was studied by using in situ high temperature XRD at beamline 4B9A of Beijing Synchrotron Radiation Facility. Transmission electron microscope (TEM) was used to observe the morphology and Inductively Coupled Plasma-Atomic Emission Spectrometry (ICP-AES) was used to analyze the chemical composition of the...
This paper presents some results from a study of luminescent properties of core shell zinc sulphide (ZnS) nanoparticles (NPs) with the Mn doped core and ZnS as the shell. Influencing factors like core shell structure and dopant concentration are tuned to investigate the effects on their luminescent properties. Results indicate that these luminescent nanoparticles potentially can be used in LEDs
In this paper, we elaborate on protocols for growing ZnO nanowires using different vapor deposition techniques to provide a comparative study for low temperature based deposition. Effects of various parameters ranging from process temperatures to material compositions were investigated. Growth from ZnO thin film seed layers and catalytic growth using Au nanoparticles were performed as well as growth...
Several plant leaf extracts (Pine, Persimmon, Ginkgo, Magnolia, Platanus, Cherry, etc.) were used and compared for their extracellular synthesis of nanomaterials. Stable gold, silver, copper, and platinum nanoparticles were formed by treating aqueous solution of HAuCl4, AgNO3, CuSO4·5H2O, and H2PtCl6·6H2O, respectively, with the plant leaf extracts as reducing agent. The biologically synthesized silver...
A facile one-step strategy to synthesize hybrid Ag NWs-graphene nanostructure for enhanced electrochemical detection of hydrogen peroxide was reported. The simple nature of our process leads to formation of Ag continuous and seamless integrated NWs-graphene hybrids with excellent interfacial electron transfer, avoiding the interface problems associated with the multiple-step process Interestingly,...
This study reports a simple but effective glycothermal method for synthesis of urchin-like vanadium pentoxide (V2O5) nanostructures for gas sensing. By this method, the V2O5 nanostructure was prepared by two steps, involving preparation of precursor, followed by calcinations. The as-prepared precursor particles were rods (200 nm×1 µm) and could assemble into microspheres or urchin-like structures...
Spin-capable multi-walled carbon nanotube (MWCNT) forests that form webs, sheets, and yarns can play an important role in means for advancing various technologies. It is critical to understand the parameters that affect to grow spin-capable carbon nanotubes (CNTs) in a repeatable fashion. In this paper, we investigated the effects of carrier gases on the catalytic properties of iron (Fe) in the synthesis...
The nanowire arrays of silver were fabricated by AC electrodeposition technique using Ag2SO4 as the origin in H3BO3 solution based on ordered nanoporous anodic aluminum oxide (AAO) template. The barrier layer between the aluminum substrate and AAO membrane was eliminated by gradually decreasing the applied anodizing voltage. Then, the AAO template was immediately used to produce the silver nanowires...
This paper investigates different properties of the TiO2-SiO2-Fe3O4 core-shell nanoparticles encapsulated for 1 times, 2 times, 3 times (which are named as TSF1, TSF2 and TSF3 in this paper). The TSF nanoparticles were obtained through carbon reduction method and sol-gel method. The properties of the TSF1, TSF2 and TSF3 were characterized by Transmission Electron Microscope (TEM), X-ray Diffraction...
In order to improve the electrocatalysis of oxygen reduction and reduce the captive cost of microbial fuel cell (MFC), graphene-supported catalyst of silver nanoparticles (Ag/RG) was prepared and its activity toward oxygen reduction reaction (ORR) in pH-neutral condition was examined. The Ag/RG catalyst was prepared by chemical reduction of aqueous silver ions to silver nanoparticles on the surface...
Quantitative Structure-Activity-Relationships (QSARs) were investigated for cellular uptake of nanoparticles (NPs) using a dataset comprised of 109 NPs of the same iron oxide core but with different surface-modifying organic molecules. QSARs were built using both linear and non-linear model building methods along with a forward descriptor selection from an initial pool of 184 chemical descriptors...
The dynamical mechanism of formation of nanoparticles during the solidification of molten Tin bronze melt is investigated. Since the melting depth phenomenon occurs immediately after nucleation during the initial stage of solidification under the influence of anisotropic surface tension, some parts on the surface of the Fe nucleus move first inward up to a melting depth distance, then start to move...
AgI nanoparticle has been reported to exhibit size-dependent properties. In the paper, we reported the use of combinations of surfactants, such as AOT, SDS, PVP and TWEEN20, to control the AgI synthesis. AgI nanoparticles can be obtained with different sizes. Measured and confirmed by DLS and TEM, the nanoparticles can be massively and evenly prepared with the sizes less than 20nm. The post-processing...
With increasing pressure on food industry to reduce waste while meeting the demand for high food quality and safety, there is a strong motivation for research into sensors for monitoring freshness and general food quality. Degradation of fresh meat and produce is related to metabolic activities of microorganisms which commonly result in formation of gaseous compounds such as CO2. Monitoring the freshness...
Nanoparticles have the potential to enhance energy localization in hyperthermia treatment. The use of nanoparticles allow the control of the electrical properties of tumors. Investigation is provided of the effect of material properties on the specific absorption rate (SAR) inside the tumor at various frequency values. Computational analysis is performed under SEMCAD X environment, considering an...
We report a simple method to fabricate a patterned ultrathin metal membrane with hexagonally arrayed sub-50 nm nanopores based on hydrophilicity-templated self-assembly monolayer (SAM) of polystyrene (PS) nanoparticles. Photolithography assisted hydrophilicity-template defines the membrane pattern, in which the arrayed nanopores are transferred from the hexagonally packed polystyrene nanoparticles...
Adjustable carrier concentration is an attractive feature of semiconductor nanoparticle that allows its surface plasmon resonance to be tuned. While quasi-static treatment of the electromagnetic interactions with the charge species can account for the polarization process in a conductive nanoparticle, a full-wave solution of the Maxwell's equations is needed to give a realistic portrait of the current...
Alginate hydrogel finds widespread applications in tissue engineering, cancer therapy, wound management and drug/cell/growth factor delivery due to its biocompatibility, hydrated environment and desirable viscoelastic properties. However Lack of controllability is still an obstacle for utilizing it in the fabrication of 3D tissue constructs and accurate targeting in mass delivery. Here, we proposed...
Ultrasmall monodispersed Au nanoparticles are synthesized using a gas-liquid interfacial plasma (GLIP) technique combined with introduction of ionic liquid and oleylamine under low gas pressure. The morphology and particle size of the synthesized nanoparticles are characterized by UV-vis, TEM, SAED and XRD.
Nanocomposites of carbon nanotubes (CNTs) coated with nickel-cobalt (Ni-Co) oxide nanoparticles were synthesized using electroless plating. Their morphology and microstructure were investigated by transmission electron microscope (TEM) and X-ray diffraction (XRD), showing that the Ni-Co oxide nanoparticles were uniformly distributed on the outer surface of CNTs and formed nanocrystals. The Ni-Co oxides...
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