X-ray microscopy offers a unique combination of large penetration depth, high resolution, and high sensitivity to elemental composition. When combined with computed tomography (CT) techniques, the full three-dimensional structure of a sample can be obtained [...]
We present the development and application of a high-accuracy embedded atom method (EAM) potential for the simulation of metal alloy nanoparticles. The potential was parametrized by a large set of density functional theory (DFT) calculations [...]
This paper describes a novel means for particle characterization, the Ultrasonic Pulsed Doppler (USPD) system. This system uses a single transducer to measure ultrasonic backscatter from moving particles to perform measurements of particle concentration, size [...]
We present a spectroscopic technique for measuring particle size. The technique utilizes a UV-Visible spectrophotometer to measure the attenuation spectrum of a particle dispersion due to scattering. Using the Mie scattering theory, we compute the [...]
Polymer nanocomposites (PNCs) represent an alternative new class of materials compared to conventional filled polymers or polymer blends, as they can possess enhanced properties through nanoscale reinforcement. A great deal of efforts have been devoted [...]
(NCC) are tubes, about 200 nm long and 20 nm in diameter. This is a natural product, found in wood. It is separated by paper mills from long fibers, and rejected in mass volumes. In [...]
Purpose: Over 80% of human pancreatic cancer expresses epidermal growth factor family of receptors on the cell surface. In this study, we have examined the potential of EGFR-targeted gelatin-based engineered nanovectors (GENS) for plasmid DNA [...]
Mechanical property, UV resistance, and oxygen permeation performance of automobile polyurethane (PU) coating containing NCO-functionalized (MWCNTs and nanoclays) have been measured. A novel method was used to functionalize CNTs and nanoclays using a diisocyanate in [...]
Nanocrystalline lanthanum zirconium oxide (LZO) films have been successfully synthesized by a wet-chemical route, using dried lanthanum acetate, zirconium propoxide, propoionic acid, acetic acid glacial, and anhydrous methanol. X-ray 2 -scan diffraction patterns of the [...]
There has been an increasing demand for analytical tools that can quantify the interaction and/or reaction of nano-scale particles, polymers as well as bio-molecules, with various surfaces. In-situ monitoring of structural and dynamic changes of [...]
Structures and property of surface are very important in different chemical, physical and biological process. The interaction between the reactant molecules (adsorbate) and the surface are important in the performance of the catalyst. Surface with [...]
To size smaller particles, dynamic light scattering (DLS) that utilizes time variation of scattered light from suspended particles to obtain their hydrodynamic size distribution is the most popular technology. For measuring turbid samples with particle [...]
A new nanoparticle sizing and characterisation technique is described which allows nanoparticles in a suspension to be individually but simultaneously detected and analysed in real time using a low cost instrument. Nanoparticles of all types [...]
The helium ion microscope is offering new windows into nano-scale imaging. Unique sample interaction dynamics allow new types of sample information to be gathered. Some fundamental advantages conferred by probing a surface with a helium [...]
, Bosse A.W.
, Briber R.M.
, Douglas J.F.
, Jones R.L.
, Karim A.
, Kim H-C
, Kim S.
, Lacerda S.H.
, Yager K.G.
, Zhang X.
, NIST, US
A primary limitation of block copolymer films as templates for next generation electronic or data storage devices is the prohibitively long times required for thermally driven self-assembly and defect annihilation and long range order development. [...]
The goal of this work was to characterize a blend PA6 and PET using a combination of Raman Spectroscopy and AFM techniques. The Raman Microscopy Image revealed the general structure of a PA6 and PET [...]
Atomic Force Microscopy (AFM) is an important tool for nanoscale molecular recognition studies. A strong suit of AFM is its ability to measure hardness/elasticity, nonspecific adhesion, or ligand-receptor interactions at the picoNewton scale. Molecular interactions [...]
The paper presents a methodology with nanoindentation experiments to characterize the mechanical properties of MEMS switches. After that, simple analytical models for mechanical and electrostatic aspects are used to validate these mechanical characterizations. At the [...]
The accurate mechanical characterisation of thin membranes is recognized of prime importance for the development of membrane-based MEMS. To address this issue, we have built a measurement system which uses a nanoindentor to apply a [...]
The ultrasharp tungsten wires were produced by electrochemical method for electroexplosion of polymers. The effects of electropolishing control parameters, tungsten wire diameter, applied voltage and depth of the wire immersion into electrolyte, on the tip [...]
It is possible to grow single crystals directly on nanoprobes, such as atomic force microscope (AFM) probes, tungsten needles and nanotapered glass pipettes. We have grown single Ag2Ga nanoneedles and PtGa6 nanoplates/blades from supersaturated melts [...]
A novel scanning probe methodology based on lateral force microscopy is presented wherein kinetic friction measurements, obtained as a function of velocity for various temperatures, are used to deduce apparent Arrhenius-type activation energies for surface [...]
The trend towards the application of nanoparticle filled materials in the aerospace and automotive electronics sectors have led to a strong need in material characterization on the micro and nano scale. In addition MEMS and [...]
A novel nanoscale thermomechanical methodology is introduced involving resistively heated cantilevers, also referred to as heated tip AFM (HT-AFM), that provide direct access to the interfacial interaction strength between poly(trimethyl silyl propyne) (PTMSP) - silica [...]
Two novel methods for the structurally identification of a nanocrystal from either a single high resolution (HR) transmission electron microscopy (TEM) micrograph or a single electron precession diffractogram are described. While the structural information that [...]
Serious cases of corrosion in metal structures under both alternating current (AC) and cathodic protection (CP) have been reported. The objective of this research is the proposal of a mechanism by which AC affects the [...]
This paper presents measurements of the size and doping dependence of the piezoresistive effect in top-down fabricated p-type crystalline and polycrystalline silicon nanowires. Test chips with 6 differently sized piezoresistors and integrated contacts for electrical [...]
, Bamiduro O.
, Konda R.B.
, Mundle R.
, Mustafa H.
, Pradhan A.K.
, Rakhimov R.R.
, Sellmyer D.J.
, Wei X.
, Norfolk State University, US
Chemically synthesized highly crystalline lanthanum strontium manganite LaSrMnO3 and Eu-doped Y2O3 and their composites, yielding nanoparticles of size 30–40 nm are reported in this paper. Magnetic measurements performed on the synthesized nanoparticles and composites showed [...]
Polymers of different kinds are widely used in NanoImprint Lithography. First of all it is a usage of thermoplasts in thermal NIL. In step and flash imprint lithography photo-cured polymers are used. Thermocurable polymers could [...]
Barrier coatings are essential to protect organic light emitting diodes (OLED) as well as polymer packaged components from moisture- and oxygen-aided deteriorization. One such coating technology is atomic layer deposition (ALD), used here to grow [...]
Hyperbranched polymers were explored to develop UV-curable, protective coatings for aluminum 2024-T3 and their viscoelastic and mechanical properties were characterized using nanoindentation techniques. The coating system consists of a hyperbranched polyester acrylate (CN2300, Sartomer Inc), [...]
The Army is transforming into a more lethal, lighter and agile force. Enabling technologies that support this transition must decrease in size while increasing in intelligence. Micro-electromechanical systems (MEMS) are one such technology that the [...]
Electroless and Electrolytic plating has had to keep up with the demands in developing new technologies to meet the needs of filling nano and micro structures. Requirements have been for plating angstrom thin layers with [...]
With a view to understand the influence of nano size on various structural, electronic and magnetic properties of nanostructured Sn1-xCoxO2, systematic investigations have been carried out. After synthesizing the samples by sol-gel route, structural characterization [...]
As the functional materials, rare-earth (RE) oxides have been widely used in various fields in the past two decades, such as high-performance luminescent devices, magnets, catalysts, batteries, sensors, etc. Among the rare-earth (RE) oxides, Dy2O3 [...]
TiN powder was obtained by reaction milling of a titanium powder in air. The Ti powder was milled in an attrition mill or a Spex mill. Characterization of the powders was carried out by means [...]
The chemical decomposition technique was used to sythesize Y2O3 nanophospors. This technique (to our knowledge, a new technique used to synthesize Y2O3 nanocrystalline phosphors) is based on the thermal decomposition of Yttrium alginate gels. The [...]
Polypyrrole thin films were prepared by electrochemical process and then these films were irradiated by Swift Heavy Ions and by gamma rays. The structural and optical properties of the Polypyrrole thin films were characterized by [...]
Numerous studies reported over the past decade have sought to establish fundamental relationships between morphology and property development in triblock copolymer gels as explicit functions of copolymer molecular weight, copolymer concentration, solution concentration, solvent quality, [...]
The present study proposes an efficient and easy mass production method for nano dimple structures by injection molding. Anodic aluminum oxide (AAO) technique is utilized to make a master with nano dimple structures, and then [...]
Polypropylene/clay nanocomposites were prepared by using a two step melt compounding process on twin screw extruders. In order to enhance the exfoliation, time and degree of mixing were varied using different screw speeds and dosing [...]
In this work, two series of polymeric particles of poly(butyl acrylate-co-methyl methacrylate), P(BuA-MMA) functionalized with acrylic acid (AA) were synthesized by means of emulsion polymerization techniques. In both cases, the total carboxylic concentration was varied [...]
Nickel exhibits a high initial electrocatalytic activity toward the HER. Enhancement of cathodic activity of nickel for electrolytic hydrogen evolution has been carried out by the formation of nanostructured nickel materials. In this respect, the [...]
Magnetic properties of iron-filled multiwalled carbon nanotubes have been investigated. Hysteretic and temperature dependent magnetic responses reveal a superparamagnetic behaviour at temperatures below 150ºC. The saturation magnetization of the nanowires at 5K is found to [...]
Nanocrystalline Gd2-xEuxO3 phosphors by a simple sol-gel method have been synthesized. The effects of the annealing temperature and atomic fraction of Eu3+ ions (x) on the structural and luminescence properties of the mixed oxides have [...]
Nanotechnology is a highly energized discipline of science and technology. One of the major challenges of nanotechnology is the synthesis of nanomaterials with a wide range of chemical compositions and sizes. Nanobiotechnology is a promising [...]
Nanoparticles have attracted considerable interest because of their unique optical, electromagnetic and catalytic properties that differ from bulk ones. The origin of these properties is their large surface to volume ratio and from the coherent [...]
Shape-Controlled Synthesis and Catalytic Behavior of Supported Platinum Nanoparticles Selective hydrogenation reaction is influenced by many factors, which include the presence of catalytic activators or poisons, the temperature, pressure, solvent agitation and other conditions specific [...]
Platinum is considered one of the best electrocatalyst for low temperature reactions in a H2/O2 fuel cell. Metallic nanoparticles are of great interest because of the modification of properties observed due to size effects, modifying [...]
This paper investigated the effects of the shape of nanoparticles on the crystallization behavior of high molecular weight poly(ethylene terephthalate) (PET ; inherent viscosity of 0.98 g/dl) in the shear and elongational flow fields. Two [...]
Nanocrystalline TiO2 is one of the most important and used photocatalysts because of the excellent efficiencies of conversion of chemical species, and its chemical stability. Its photocatalytic properties are activated only by UV light; nevertheless, [...]
Surfaces of nanoscale materials of all types must be kept clean to properly characterize their behavior. Materials that are characterized at cryogenic temperatures and in vacuum present additional challenges to maintaining clean surfaces. Any residual [...]
Zinc nanostructures synthesized with different morphologies from the same evaporation/condensation technique are studied with concern to surface reactivity to NO2 by Diffuse Reflectance Infrared Fourier Transformed Spectroscopy (DRIFTS). Synthesis of nanopowders is obtained, according to [...]
We studied the formation of Langmuir monolayers of two series of amphiphilic monodendrons -conjugated from first to third generation number with different length of terminal chains C3H7 and C12H25, the characterization of the monolayer was [...]
Thin nanostructured films by Langmuir and Langmuir-Blodgett technique of novel azocompounds are reported. Brewster’s angle microscopy (BAM), UV-Visible absorption and atomic force microscopy (AFM) were obtained to determine the stability and quality of the films. [...]
The surface morphology, microstructure and transport properties of the thin films are clearly a function of deposition temperature and post-annealing conditions.It is seen from our experimental data that post- annealing is required to obtain a [...]
Journal: TechConnect Briefs
Volume: 1, Nanotechnology 2008: Materials, Fabrication, Particles, and Characterization – Technical Proceedings of the 2008 NSTI Nanotechnology Conference and Trade Show, Volume 1
Published: June 1, 2008
Industry sector: Advanced Materials & Manufacturing
Topics: Materials Characterization & Imaging