Papers:
Gas-phase synthesis of highly-specific nanoparticles on the pilot-plant scale
Huelser T., Schnurre S.M., Schulz C., Wiggers H., Institute of Energy and Environmental Technology, DE
Highly-specific nanoparticles from the gas-phase provide promising properties for a large variety of applications as the size dependence of their properties allows to tailor materials for specific applications. Industrial nanoparticle production, however, is covered by [...]
Gas phase synthesis of silica nanoparticles in a hybrid microwave-plasma hot-wall reactor
A microwave plasma reactor was constructed for gas phase synthesis of silica nanoparticles from tetraethoxysilane and a subsequent hot-wall furnace was used to enable for different temperature/time profiles. This combination has enabled us to investigate [...]
Ionic Liquids – Novel Tenside like Materials for size controlled Preparation of Nanoparticles and safe-to-handle Nanoparticle Dispersions
Beyersdorff T.F., Stiemke F.M., Willm A., Schubert T.J.S., Iolitec - Ionic Liquids Technologies GmbH, DE
The use of ionic liquids as green solvents for the synthesis of nanoparticles and their impact on the size control of the produced nanoparticles will be highlighted in this contribution as well as their influence [...]
Highly conducting nanosized monodispersed antimony-doped tin oxide particles synthesized via nonaqueous sol-gel method
Müller V., Rathousky J., Fattakhova-Rohlfing D., J. Heyrovsky Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, CZ
Conducting antimony-doped tin oxide (ATO) nanoparticles were prepared by a nonaqueous solution route, using benzyl alcohol as both the oxygen source and the solvent, and tin tetrachloride and various Sb(III) and Sb(V) compounds as tin [...]
Investigation of the stabilisation mechanism of small ZnO quantum dots below 20 nm
Segets D., Marczak R., Schäfer S., Peukert W., Friedrich-Alexander-University of Erlangen-Nuremberg, DE
ZnO semiconductor quantum dots have attracted considerable attention during the past ten years due to their promising electro-optical properties. Besides fundamental research on the particle synthesis itself, especially the nanoparticles optimization regarding electronic devices or [...]
The use of PEO-PPO-PEO block copolymers in the synthesis of nano ZnO via the hydrothermal method
This investigation studied the effects of different molecular weight of the blocks in the PEO-PPO-PEO block copolymers, the different starting zinc compounds and different hydrothermal parameters on the particle size and morphology of ZnO. The [...]
Au, Ag and Au-Ag nanoparticles: microwave-assisted synthesis in water and applications in ceramic and catalysis
Blosi M., Albonetti S., Gatti F., Dondi M., Migliori A., Ortolani L., Morandi V., Baldi G., Istec-CNR, IT
The research was focused on the synthesis of Au, Ag and Au-Ag core-shell sols, prepared by a patented microwave-assisted green synthesis. The method provides colloidal mono and bimetallic nanoparticles throughout the reduction of precursor’s salts [...]
In Situ Quick XAFS Study on the Formation Mechanism of Cu Nanoparticles Synthesized in Aqueous Phase
Nishimura S., Takagaki A., Maenosono S., Ebitani K., Japan Advanced Institute of Science and Technology, JP
The formation mechanism of copper nanoparticles (NPs) using poly(N-vinyl-2-pyrrolidone) (PVP) as a capping agent was investigated by measurements of X-ray diffraction (XRD), transmission electron microscopy (TEM), in situ time-resolved X-ray adsorption fine structure (XAFS) analysis, [...]
Hydrothermal synthesis and Photoluminescent characterization of nanocrystalline BaZrO3
Diaz-Torres L.A., Salas P., Castaño V.M., Oliva J., De la Rosa E., Centro de Investigaciones en Optica A C, MX
Uniform well faceted sub-microcrystalline BaZrO3 particles have been obtained by a facile hydrothermal reaction. It is found that both morphology and photoluminescence properties depend on reaction time, complexation surfactant, solvent water to ethanol ratio, as [...]
Synthesis of Sulfated and Carbon-Coated Al2O3 Aerogels and Their Activity in Dehydrochlorination of 1-Chlorobutane and (2-Chloroethyl)ethyl Sulfide
Alumina is widely used as a sorbent and catalyst support. These applications typically require high surface area, stability in the used environment and often the presence of specific groups on the surface. Many of these [...]
Sol-gel Synthesis of Ferrite Foam Materials for H2 Generation from Water-Splitting Reaction
Ferrites in the form of spinel, doped spinel, and wustite are used for H2 generation from thermochemical water-splitting reaction. Although these ferrites have been synthesized by solid-state mixing, self-propagation high temperature synthesis and aerosol-spray pyrolysis [...]
The Mechanochemical Formation of Functionalized Semiconductor Nanoparticles for Electronic and Superhydrophobic Surface Applications
A rapid, direct and efficient method for the fabrication of functionalized semiconductor nanoparticles is described. The mechanochemical method involves the simultaneous top-down formation of nanoparticles using high energy ball milling (HEBM) and reaction with a [...]
Electrical Properties of Functionalized Silicon Nanoparticles
Phosphorous-doped as well as undoped Si-NPs with a mean particle diameter of about 50 nm were synthesized in a microwave plasma. The natural oxide was removed by etching the particles with hydrofluoric acid. In order [...]
Precipitant molar concentration effect on the upconversion emission in BaZrO3:Er,Yb nanocrystalline phosphor
Diaz-Torres L.A., Salas P., Castaño V.M., Oliva J., Angeles-Chavez C., Centro de Física Aplicada y Tecnología Avanzada, Universidad Nacional Autónoma de México, MX
Strong Blue, green, and red upconversion emission of Er3+ in sub-microcrystalline BaZrO3:(Yb3+Er3+) is observed. Powder samples were obtained by a facile hydrothermal process at 100ºC with different water to ethanol solvent ratios. The as synthesized [...]
New ripening mechanism for silver and gold nanorods in aqueous solution
In the last years an increasing number of publications addressed the relationship between particle shape and the electro-optical product properties. Especially anisotropic metal particles e.g. gold or silver were found to be promising candidates as [...]
Durability of Pt/MWCNT Nanocatalyst in High Temperature H3PO4/PBI PEMFC
Buazarand F., Khaledib H., Almoora K., Lia Q., Steenbergc T., Jensen J.O., Bjerruma N.J., technical university of denmark(DTU), DK
The newest development in the field of proton exchange membrane fuel cells (PEMFC) aims at higher operational temperatures above 100˚C [ ] which have been the main research focus at the Energy and Materials Science [...]
Nano Silver – Why It is so Hot Now?
Lem K.W., Haw J.R., Lee D.S., Brumlik C., Sund S., Curran S., Smith P., Brauer S., Schmidt D., Konkuk University, KR
It has been known for centuries that silver has an antiseptic effect. In ancient times, many Greeks used silver vessels for drinking water storage. Koreans have also chosen silver to make their metal chopsticks. Recently, [...]
Surface Enhanced Raman Utilizing Magentic Core Silver Shell Nanoparticles
SERS is an extremely sensitive technique exploited in laboratory investigations to provide single molecule detection. In sensor applications, this sensitivity has not been fully realized in part due to the low scattering efficiency. We hypothesize [...]
Au nanoparticles functionnalized by J-aggregates for highly efficient strong coupling applications
Djoumessi Lekeufack D., Brioude A., Bellessa J., De Zeng L., Coleman A.W., Miele P., Université Claude Bernard-Lyon 1, FR
The coupling of organic molecules and metallic nanostructures brings new opportunities to develop highly efficient photonic devices that combine the best features of those two specific materials. Indeed, the interactions between the electronic transitions of [...]
Electron instabilities in nanoclusters, nanostructures and inhomogeneous nanomaterials: bottom up approach
Inhomogeneous nanomaterials with strong local electron correlations are creating a new world-view in condensed matter physics [1-4]. These materials with intrinsic ihomogeneities have electronic and magnetic properties that are widely different from the conventional materials. [...]
Ultrasonically sprayed nanostructured SnO2 thin films for highly sensitive hydrogen sensing
Nanostructured SnO2 thin films were prepared by ultrasonic spray pyrolysis technique. The aerosol produced by nozzle was sprayed on glass substrate heated at 150oC. The sensing performance of the films was tested for various gases [...]
Synthesis of highly-doped silicon and germanium nanoparticles in a low-pressure plasma-reactor for thermoelectric and solar applications
Microwave-plasma induced thermal decomposition of gaseous precursors like germane (GeH4) and silane (SiH4) is used to synthesize semiconductor nanoparticles for thermoelectric and thermal applications. P and n-doping can be achieved by mixing silane and germane [...]
Formation mechanism of copper-silver metal nanoparticle encapsulated in carbon shell
The formation mechanism of nanosize copper-silver encapsulated in the inert carbon shell (CuAg@C) has been studied by in-situ small angle X-ray scattering (SAXS) spectroscopy. SAXS is a very useful method in studies of electron density [...]
The Use of Taguchi Method to Determine Factors Affecting the size of fine attapulgite particles generated by rapid expansion supercritical solution with and without cosolvents
The presence of fine particles tends to increase viscosity. Besides the solid load particle properties, especially the specific surface area, have a pronounced impact on the suspension’s viscosity. Attapulgite is used as a viscosifier in [...]
Manufacture of ultrafine drug particles via the Rapid Expansion of Supercritical Solution (RESS) Process using Taguchi approach
A multitude of pharmaceutical substances are often insoluble or only slightly soluble in aqueous media and the application of oral or injectable drugs is often limited by its low bioavailability. Recently, there have been great [...]
Synthesis of Cobalt-based Nanoparticles in Silicon Dioxide for Nonvolatile Memory Applications
In this study, we report the direct growth of cobalt (Co) silicide nanocrystals (NCs) by thermally annealing of a simple sandwich structure consisting of an ultrathin Co layer sandwiched between two silicon-rich oxide (SiOx) layers, [...]
Microwave-assisted superparamagnetic FePt synthesis for MRI application
Tsai J.L., Tsai M.J., Tsai T.Y., Tsai J.L., Tsai M.J., Tsai T.Y., Tsai J.L., Tsai M.J., Tsai T.Y., Lai P.S., National Chung Hsing University, TW
uperparamagnetic iron oxide (SPIO) nanoparticles have demonstrated their practicability as MRI T2-shortening agents for non-invasive cell labeling, drug delivery or tumor detections in clinical practice. Recently, superparamagnetic chemically disordered face-centered cubic (fcc) FePt nanoparticles has [...]
Application of Sugimoto model on particle size prediction of colloidal TiO2 nanoparticles
This can be provided by understanding the nucleation and growth mechanism of nanoparticles. In this paper, the nucleation and the growth of TiO2 nanoparticles were studied with Sugimoto model, in a homogeneous closed system which [...]
Preparation of nitrogen-doped mesoporous TiO2 with a room-temperature ionic liquid
A nitrogen-doped mesoporous TiO2 (N-TiO2) was synthesized using a room-temperature ionic liquid (RTIL) (C4mimBF4) as the template. By 1H NMR (Figure 1), interactions between Ti and nitrogen of the RTIL are observed. The nanosize mesoporous [...]
Preparation of Nanosize Copper Recycled from an Electroplating Wastewater
Chemical structure of copper recycled directly from an electroplating (EP) wastewater for preparing core-shell nanoparticles has been studied by X-ray based spectroscopy in the present work. Experimentally, about 40-50% of copper in the EP wastewater [...]
Synthesis of nanocrystalline (Zn1-xCox)Al2O4 solid solution: structural and optical properties
Fernández-Osorio A., Hernández- Mendoza D., Pineda-Villanueva E., Universidad Nacional Autonoma de Mexico, MX
New inorganic pink pigments based on nanocrystalline (Zn1-xCox)Al2O4 solid solution, were prepared using the hydrothermal method, obtaining nanoparticles below 8 nm. The spinel ZnAl2O4 was chosen as host hue to introduce Co(II) ions, because zinc [...]
Synthesis of Nanocrystalline VOx/MgO Aerogels and Their Application for Destructive Adsorption of CF2Cl2
Ilyina E.V., Mishakov I.V., Vedyagin A.A., Bedilo A.F., Klabunde K.J., Boreskov Institute of Catalysis, RU
Nanocrystalline VOx/MgO is extensively studied as a potential catalyst and adsorbent. In this commutation we shall report further advances to the recently developed method for synthesis of binary VOx/MgO aerogels by hydrolysis of the V [...]
Microwave-assisted synthesis of water soluble ZnSe@ZnS quantum dots
Semiconductors nanocrystals known as quantum dots (QD’s) have attracted much attention because of their optical properties can be tuned just by controlling their crystal-size, composition and shape at the nanoscale. Compared to organic dyes, quantum [...]
Hydrothermal Growth of ZnO Nanostructures Using Zinc Thin Films as Seed Layer
Different zinc oxide nanostructures are selectively synthesized by a simple reaction of zinc acetate dihydrate with hexamethyltetramine (HMT) under mild hydrothermal conditions using zinc thin films as seed layer. Scanning electron microscopy (SEM) result of [...]
Synergistic effect of Cobalt and Nitrogen doping on Anatase Titania for Photodegradation under Visible light
This work reports on the synergistic effect of cobalt on Carbon and Nitrogen codoped anatase titania photocatalysts prepared via sol–gel method using urea as the nitrogen source. Visible light activity is achieved as result of [...]
Fuel cell catalysts based on core-shell nanoparticles
In this contribution, we focus on the different approaches to dispersing Pt and Co/Pt core/shell nanoparticles in solution and then depositing them on representative catalyst supports. These include gold or highly ordered pyrolytic graphite (HOPG) [...]
Characterization and synthesis of nano magnetic particles
Characterization & Synthesis Nano magnetic particles. Ms. Meera Thiyagarajan AP/Physics, Department of Physics Vivekanandha Institute of Engineering and Technology for Women. Magnetic particles find wide applications and specifically as memory device. The emerging new storage [...]
Early Stages of Particle Formation by in-situ UV-Vis and HRS
We present a new approach for the study of early states of particle formation that can be applied also for precipitation processes that occur on a millisecond timescale. A T-shaped micro-mixer is used to precipitate [...]
Green Chemistry Used in the Synthesis and Characterization of Silver and Gold Nanoparticles
Vallejo R., Segovia P., Elizondo N., Vázquez O., Coello V., Castaño V., Universidad Autonoma de Nuevo Leon, MX
Gold (Au) and silver (Ag) nanoparticles have a diversity of interesting properties between which they emphasize the electrical ones, optical, catalytic and the applications in biomedicine like antibacterial and antiviral, same that depend on their [...]
Polarity sensitive colloidal gold nanoparticles
Polarity sensitive gold nanoparticles have been synthesized and their fluorescence properties have been measured. The effect of external factors such as alcohols, polyamines and detergents has been investigated.
The Reaction of Nano-scale Iron Fluidized in Microwave Radiation Field to Treat Chlorobenzene
Lee C-L, Wang H.P., Wang Y-S, Wu C-R, Wang H.P., Wang Y-S, Jou C.-J.G., National Kaohsiung First University of Science and Technology, TW
Microwave (MW) energy is combined with nano-scale iron particles fluidized in aqueous chlorobenzene (CB) solution for reducing the activation energy of CB to enhance it decomposition. When the metal particles are fluidized in solution, the [...]
Effect of C Content and Calcination Temperatures on the Characteristics of C-doped TiO2 Photocatalyst
This study is about the effect of carbon content and calcination temperatures on the characteristics of C-doped TiO2 prepared by sol gel method. Synchrotron radiation with high energy and resolution was applied for the identification [...]
Formation and stabilization of gold and silver clusters and nanoparticles in mordenites
Pestryakov A., Bogdanchikova N., Tuzovskaya I., Avalos M., Farías M.H., Tomsk Polytechnic University, RU
Supporting silver and gold on mordenites by ion-exchange method with further reduction with H2 leads to formation of neutral and charged metal clusters inside zeolite channels as well as metal nanoparticles on external surface of [...]
SAPHIR – European Project
Industrial needs in terms of multifunctional components are increasing. Several sectors are concerned, ranging from mature high volume markets like automotive applications, high added value parts like space & aeronautic components or even emerging activities [...]
Preparation of ZnAl2O4 Catalytic Support by Combustion Reaction: Influence of Type of Heating Source
Leal E., Viana K.M.S., Kiminami R.H.G.A., Meneghetti S.M.P., Costa A.C.F.M., Lira H.L., Universidade Federal de Campina Grande, BR
The aim of this work is to evaluate the esterification activity of ZnAl2O4 catalysts obtained by different ways of heating (IU-plate, IIU-muffle furnace and IIIU-microwave oven) during the combustion synthesis using urea as reducing agent, [...]
Catalytic Degradation of Substituted Phenols in Water by Chemically Synthesized Bimetallic Nanoalloys
Substituted phenols are important industrial products and ubiquitous in aquatic environment. Their environmental toxicity and resistance against biodegradability make them a persistent pollutant and major environmental hazard. The wide spread use of these contaminants have [...]
The influences of nanoscale titanium dioxide particle size and crystal structure on light absorbance
Nanoscale titanium dioxide is an important physical sun-block material and is widely used in sunscreen. In our test, the influences of the particle size and crystal structure on light absorbance were examined. The experiment shows [...]
Size-Controllable Synthesis and Characterization of Wide Band Gap Semiconductor Oxide Nanoparticles
A search of new class of semiconductors with metal oxides of specific sizes motivated us to synthesize nanoparticles. The preparation of nanocomposites using dispersed nanoparticles into solid hosts is nowadays an attracting scientific art and [...]
Effect of Grain Size on Neél Temperature, Magnetic and Electrical Properties of NiFe2O4 Nanoparticle Synthesized by Chemical Co-precipitation Technique
NiFe2O4 nanoparticle has been prepared by chemical co-precipitation technique. X-ray diffraction patterns of as dried and samples calcined at different temperatures for four hours have been studied. The sample in the as dried condition is [...]
Preparation and Characterization of Nanocrystalline GaP for Advanced Light Emissive Device Structures
This work will review our efforts to advance quality of GaP nanoparticles for light emissive devices based on polymer/GaP nanocomposites. The choice of materials is based on their complementary behavior since each is a candidate [...]
Fabrication of size-tunable gold nanoparticles using plasmid DNA as a biomolecular reactor
Samson J., Piscopo I., Yampolsky A., Nahirney P., Parpas A., Toschi A., Drain C.M., Hunter College of CUNY, US
Plasmid DNA has proven to be a successful template/mold for the formation of metallic nanoparticles because it is readily available, inexpensive, and malleable i.e. it can exist in different topologies. Using different plasmid DNA species [...]
Synthesis and optical properties of L-cystine capped ZnS:Co nanoparticles
IV-VI nanocrystalline semiconductors are of great interest for its applications in light emitting devices, fluorescence biosensor, and solar cells [1-4]. Here, we have reported synthesis of cobalt doped ZnS (ZnS:Co) nanoparticles capped with L-cystine by [...]
Magnetite particle size dependence on the co-precipitation synthesis method for protein separation
Reza R.T., Martínez Pérez C.A., Rodriguez Gonzalez C.A., Baques D.B., García-Casillas P.E., Universidad Autonoma de Ciudad Juarez, MX
Nowadays, magnetic particles are of great interest to different research areas, such as magnetic separation techniques, biotechnology, catalysis, magnetic resonance imaging, magnetic fluids and data storage, among others [1]. The application of magnetic particles involves [...]
Combustion synthesis and Magnetic Characterizations of Mn Substituted Ni–Zn Ferrite Nanoparticles
The ferrite samples synthesized by sol–gel auto combustion method using nitrates of respective metal ions. An analysis of X-ray diffraction patterns reveals the formation of single phase cubic spinel structure. Nano size of the particle [...]
Luminescent mechanism of bulk and nano ZnS:Mn2+ phosphors
In this study ZnS nanophosphors, with or without different concentrations of Mn2+ activator ions, were synthesized by using the chemical precipitation method. Luminescent properties of the samples were determined by photoluminescence (PL) measurements. Two peaks [...]
From Micro to Nano Magnetic Spheres: Size-Controllable Synthesis, Multilayer Coatings, and Biomedical Applications
Magnetic material has become a particular important research area and is attracting a great deal of attentions because of their potential technological applications, such as in ferrofluids, colored pigments, high-density magnetic recording media, chemical sensors, [...]
Transport of large Particles and Macromolecules in Flow Through Inorganic Membrane
The influence of transport of large particles and macromolecules on membrane separation efficiency and permeation rate limitation has been observed in many separation processes of microscopic scale. In this paper a Monte Carlo simulation model [...]
A facile low-temperature route for preparing monodisperse Mn3O4 nanopolyhedrons from amorphous MnO2 nanoparticles
In the paper, we firstly show a facile hydrothermal route for synthesizing monodisperse Mn3O4 nanopolyhedrons directly used new-made amorphous MnO2 nanoparticle with its mother solution as precursors. The hydrothermal process was performed at 160 ºC [...]
Preparation of Silver Nanoparticles via Ionomer Clusters
Silver nanoparticles can be prepared via the cluster of ionomer templates, which is a simple, fast and economical technique. The lower of acid levels of ionomers provided the smaller size of silver nanoparticles. Furthermore, using [...]
Preparation and Application of Copper Oxide Nanoparticles
The aim of this research was to synthesize copper oxide (CuO) nanoparticles, which were further applied to prepare CuO-water nanofluid, using a spinning disk reactor (SDR). The precursor of copper oxide was first synthesized by [...]
Nanopowders of TiO2 obtained by combustion reaction: effect of fuels
Almeida E.P., Coutinho J.P., Freitas N.L., Kiminami R.H.G.A., Costa A.C.F.M., Lira H.L., Universidade Federal de Campina Grande, BR
The synthesis by combustion reaction to obtain TiO2 has been studied by several researchers and using different fuels. Thus, this study aimed to evaluate the effect of fuel (citric acid monohydrate, aniline, oxalic dihidrazida and [...]
Preparation and Characterization of BiFeO3 Nanosystems as Visible Light Driven Photo-degradation of Organic Compounds
The use of renewable or low energy sources for the degradation of organic pollutants has generated broad interest in both scientific research and potential applications in recent years. Research on semiconductor photocatalysis came sharply into [...]
Magnetite nanoparticles as moderators of extreme conditions during Bradyrhizobium japanicum growth
The aim of this study was to investigate whether magnetite nanoparticles and pH simultaneously affect Bradyrhizobium growth rate (BGR) in liquid media, with a view to diminishing sensitivity to high pH and, hence, enhancing survival [...]
NanoZeolites – small particles, small pore, big impact! Porous nanoparticles for environmental applications
NanoScape has developed hydrothermal synthesis techniques which allow nanocrystalline, porous aluminosilicates (NanoZeolites) to be manufactured, currently on a 100kg p.a. scale. A range of NanoZeolites are available with pore sizes ranging from 3A to 100A. [...]
Journal: TechConnect Briefs
Volume: 1, Nanotechnology 2010: Advanced Materials, CNTs, Particles, Films and Composites
Published: June 21, 2010
Industry sector: Advanced Materials & Manufacturing
Topic: Nanoparticle Synthesis & Applications
ISBN: 978-1-4398-3401-5