Flame synthesis is a scalable technology that was developed largely by valiant evolutionary research for manufacture of commodities (e.g. carbon blacks, fumed silica and pigments). In the last 5-10 years, however, major advances in the [...]
In an effort to assess their potential for future nanoelectronic devices, we have fabricated silicon nanoparticles field effect transistors with nanoparticles as the active channel. The nanoparticles of 10-20 nm diameters are grown on a [...]
Material parameters of a solid experience a dramatic change when cluster size becomes less than a certain critical value. Hence, one can control material properties through control over cluster size. Previously we have produced and [...]
Within the scope of this work a novel process to improve the flowability of fine powders is investigated. Nanoparticles are generated by plasma enhanced chemical vapor deposition (PECVD), and deposited on the surface of the [...]
Europium doped yttrium silicate nanophosphors were successfully synthesized for the first time by using the flame spray pyrolysis method at different silicon and europium concentrations. The effect of silicon concentration on the crystal structure, morphology, [...]
An integrated process for controlled one-step production of nanostructured particulate thin films is presented, combining gas-phase nanoparticle synthesis, aerodynamic particle manipulation, size selection and deposition. Such films find industrial application for instance in fuel cells, [...]
, Li W.
, Ng M.
, Du K.
, Ting N.K.
, McGovern W.E.
, Kambe N.
, Mosso R.
, Drain K.
, NanoGram Corporation, US
Nanoscale materials continue to generate ever increasing levels of interest for applications in a broad-range of fields. Concurrently variety of synthesis methods are being explored and developed for the synthesis and production of nanoparticles including [...]
Optical properties of metal nanoparticles depend strongly on size and shape. Controlling these parameters implies improving the control of their optical properties. Metal nanoparticles find applications in photonics, biological labeling and catalysis. A number of [...]
Micro- and nanotechnologies are at the centre of numerous investigations and huge investments, essentially in the areas of information technologies and health care . The technologies utilised mainly take advantage of microelectronics and/or rather sophisticated [...]
The nanometer scale of the TiO2 plays a key role in affecting the photocatalytic performance of the material. In recent years a great deal of activity was dedicated, by the authors, to the study of [...]
, Jia W.
, Shaffer C.V.
, Weyant J.E.
, Goonewardene A.
, Guo X.
, Guo X.Z.
, Wang Y.
, Guo X.
, Guo X.Z.
, Li K.K.
, Zou Y.K.
, Jia D.
, Jia W.
, Boston Applied Technologies, Inc., US
Nanophosphors of Y3Al5O12:Ce3+ (YAG:Ce) were synthesized with a salted sol-gel (SSG) method, in which water-Heptane solutions of certain inorganic salts were used along with traditional metal alkoxides precursors. YAG phase could be formed at a [...]
Traditional fluid based synthesis techniques for the production of nano-materials can have limitations in particle morphology and composition selectivity. Particle size distributions can be insufficiently narrow for a deterministic investigation into the factors affecting magnetic [...]
Supercritical Water Hydrothermal Synthesis (scWHS) is a relatively simple and environmentally friendly process for the production of potentially valuable metal oxide nanoparticles. This paper presents the conclusions of collaborative work between chemical engineers and chemists [...]
Perchlorate removal in a clean, cost-effective and public-acceptable approach is one of the important issues for current drinking water treatment. Catalytic membrane (CM) was prepared by coating monometallic catalysts of the nano-size onto supports by [...]
A new class of high-performance nanoporous sorbents has been developed for heavy metal removal that overcomes the deficiencies of existing technologies. These novel materials are created from a combination of synthetic mesoporous ceramic substrates that [...]
Traditionally, the development of shear thickening fluid (STF) begins with micron size silica suspended in water. This material is transformed into STF through centrifugation and exchange processes. In other approaches polyethylene glycol (PEG) is added [...]
Magneto-rheological (MR) fluids represent an exciting family of smart materials that have the unique ability to undergo rapid (within a few µs) changes in their apparent viscosity on the application of an external magnetic field. [...]
The increasing use of ceramic nanoparticles for the fabrication of novel functional parts and devices has brought several new possibilities and challenges in the field of ceramics. Surface chemistry is known to play a major [...]
Boron carbide (B4C) is an attractive material due to its extreme hardness, low specific weight, high chemical stability and good wear resistance. In this study, nano-sized boron carbide powders have been prepared through a carbothermal [...]
Thermostability study of commercial P25 TiO2 nanoparticles was carried out by ascending annealing temperature from 400 to 1100 oC. The thermostability of TiO2 structure was measured by X-ray diffraction (XRD). Anatase-Rutile phase transition occurred only [...]
Organophosphorus pesticides and warfare agents are not readily hydrolyzed in aqueous media without applying extremes of pH, heat, or bleach. We show that suspensions of magnetite (Fe3O4) nanoparticles modified with a common antidote, 2-pralidoxime (PAM), [...]
Purpose: Novel materials with single particle dimensions at the nano scale are submitted to our laboratory on a regular basis. These samples include single walled nanotubes (SWNT), buckyballs, quantum dots and various metal oxides. Determining [...]
Continuous, single-step synthesis of cubic monocrystalline Y2O3:Eu3+ nanophosphor particles (10 -20 nm in grain diameter) is achieved by flame spray pyrolysis (FSP). The effect of FSP process parameters on product particle characteristics was investigated by [...]
Electric Field Assisted Self-Assembly of Functionalized Nanoparticles into Multiple Layer Thin Films Michael J. Heller, Benjamin Sullivan and Dietrich Dehlinger Departments Bioengineering and Electrical and Computer Engineering University California San Diego La Jolla, CA 92093 Reconfigurable [...]
Citrate-reduced silver colloids are used extensively for SERS (surface-enhanced Raman spectroscopy) detection of low concentrations of cations but are typically ineffective for detection of anions, since the metal surface bears a negatively charged citrate layer. [...]
A combustion synthesis, also called self-propagating high-temperature synthesis, has been found to be an effective and economical production method of advanced ceramic and intermetallic compounds. This method is very suitable for the formation of nonstoichiometric [...]
Cascade reactions involve multiple catalysts promoting multiple reactions in a single vessel. However, these one-pot reactions generally yield a mixture of non-separable catalysts. Our research demonstrates a new approach in chemical catalysis through the use [...]
Dental hypersensitivity is a problem for large sectors of the population. The problem is caused by the movement of fluid within tiny channels, called tubules, which radiate from the pulp to the surface of the [...]
Maintaining an adequate oxygen supply to aerobic cell cultures has been a long-standing problem in fermentation technology. Insufficient oxygen transfer rates limit cell growth and ultimately process productivity. Our approach to reducing the oxygen transport [...]
We report the optimization of exchange spring coupling ofFePt/Fe3Pt nanocomposites via independently tuning their size and composition by a micro-emulsion method. These nanocomposites are deliberately placed in each silicanano-spheres such that the problem of their [...]
NanoActive materials are novel forms of metal oxides that possess extremely high surface areas (100-700 m2/g), defect-rich morphology (many corner and edge sites), large porosities (up to 1 cc/g), and small crystallite sizes (2-10 nm). [...]
In this work, we show that it is possible to elucidate among different polyhedral shapes of silver nanoparticles of less than 10 nm, by studying their surface plasmon resonances. When a particle is excited by [...]
In recent years semiconductor nanocrystals (QD) have attracted much attention due to their great potential in technological applications. Electronic, optical and other properties of QD with respect to corresponding bulk materials are modified considerably, offering [...]
In this work we report the phase formation and magnetic properties of CoFe2O4 nanopowder prepared by mechanical alloying technique using metallic cobalt and hematite powder (1:1 molar ratio) as the initial raw material in ambient [...]
The static dielectric constant of isolated silicon nanocrystal (nc-Si) embedded in a SiO2 thin film synthesized by Si+ implantation has been determined from capacitance measurement based on the Maxwell-Garnett effective medium approximation and the Stopping [...]
This presentation describes a unique approach to the synthesis of colloidal structure-directing-agent-free hydroxy-sodalite nanocrystals by using silicalite nanocrystals as a silica source.Under the aid of TPAOH molecules trapped in the dried silicalite nanocrystals, the silicalite [...]
The design, manufacture and use of quantum dots and gold nanoparticles for detection and prevention of the onset of malignant tumor formation is presented. Gold nanoparticles and quantum dots are finding increasing application as bio-chemical [...]
Nanostructured DMSs are of great importance due to potential applications in spintronics and photo-electronic devices. Recent studies propose that ZnS doped with transition metal ions can exhibit ferromagnetic behavior at room temperature. The present work [...]
The emission control catalyst market is about $11 billion and growing while global concerns over environmental pollution have resulted in increasingly stringent regulations. This business opportunity, however, is complicated by the requirement for higher performance [...]
Modern skin care formulations must meet high standards of efficacy, skin compatibility and aesthetic appeal. The performance of a cosmetic product is related to the entire formulation and an optimal galenic formulation that incorporates a [...]
In this work we present results on novel approaches related to the solution Combustion (SC) of nano-sized materials. First it was shown that under optimized conditions, SC reactions can be locally initiated and a steady-state [...]
Since electrostatic device has been practiced for anti-foulant treatment effect on processing the industrial wastewater, the electric force is suspected to induce the alteration of surface charges of colloidal particles in the aspect of reducing [...]
Background: Magnetic Resonance Imaging (MRI) is a powerful non-invasive technique that provides high-resolution anatomical images of biological tssue based on their inherent physio-chemical properties. The signal from MRI can be modulated by contrast agents, which [...]
Nanoparticles have been extensively studied as drug delivery systems. In this presentation, we focus on a relatively new type of nanoparticles – lipobeads – a liposome-hydrogel assembly as a novel drug delivery system. Lipobeads are [...]
Photodynamic medicine is a novel approach for cancer therapy and diagonosis via different photosensitizers and suitable light source. The 5-Aminolevulinic acid (5-ALA) can be converted into protoporphyrin IX (Pp IX ) that can be utilized [...]
Purpose: To develop nanoemulsion formulations to enhance oral bioavailability of hydrophobic drugs. Paclitaxel was selected as a model hydrophobic drug. Methods: The oil-in-water (o/w) nanoemulsions were made with pine nut oil as the internal oil [...]
In this study, we attempted to present a direct synthesis of narrowly dispersed silver nanoparticles in highly concentrated organic phase (> 2 M) without use of a size-selection process The fully organic phase system contains [...]
High Molecular weight nano/micron sized polystyrene (Mv=1X106) was prepared by styrene and hydrogen peroxide. Transmission electron microscopy (TEM) and atomic force microscopy (AFM) measurements indicated that the particles matched with that of the polymer single [...]
Titanium dioxide (TiO2) is an important material and has many applications, Sol-gel process has many advantages over conventional preparative methods. In the present work, the advantages of the sol-gel process has been exploited and prepared [...]
Nickel ferrite (NiFe2O4) spinel structure of magnetic material has exhibits wide range of applications. NiFe2O4 exhibits unusual physical and chemical properties when it is prepared in nano size. Solid state reaction method has been widely [...]
Dispersing NanoParticles into liquids can be challenging, the tremendous surface area and surface energy which provides the beneficial effects of nanomaterials also prevents easy dispersion into liquids. Conventional technology for dispersing powders into liquids is [...]
Polymer-coated superparamagnetic iron oxide nanoparticles are interest of wide range of applications from magnetic recording to biomedical applications. Size control, stability and surface functionalization of the nanoparticles are the key issues in the field. Poly(acrylic [...]
A method of non-thermal, photochemical calcinations is described for an efficient and spatially controlled removal of the organic template in the preparation of zeolite MFI nanoparticles and thin films. High silica MFI nanoparticles and thin [...]
High surface area ceria nanoparticles have been prepared using a citrate sol-gel precipitation method. Changes to the particle size have been made by calcining the ceria powders at different temperatures, and X-ray methods used to [...]
Superparamagnetic iron oxide (Fe2O3) has emerged as potential MRI contrast agent in whole animal imaging to localize the site of clinically important physiological damage such as ischemia, angiogenesis, oxygen insufficiency, immuno-deficiency [1, 2]. We achieved [...]
Magnetic nanoparticles encapsulated in a thin coating as magnetic separable nano-vehicle for chemical species is a hot but challenging area. The stability of the small magnetic body remains a key issue. In this meeting, we [...]
, Leccardi M.
, Bertolini G.
, Rorato O.
, Franchi M.
, Bandiera D.
, Gatelli M.
, Wegner K.
, Raso A.
, Garibbo A.
, Ducati C.
, Piseri P.
, Milani P.
, Tethis S.r.l., IT
Supersonic cluster beam deposition was employed to produce nanostructured thin films of transition metal oxides to be used as gas sensors. The cluster beam was generated by a pulsed microplasma cluster source equipped with aerodynamic [...]
Journal: TechConnect Briefs
Volume: 1, Technical Proceedings of the 2006 NSTI Nanotechnology Conference and Trade Show, Volume 1
Published: May 7, 2006
Industry sector: Advanced Materials & Manufacturing
Topic: Nanoparticle Synthesis & Applications