Papers:
Maintaining a Stable Engineered Nanomaterials Process through Material Characterization during the Nano Product Life Cycle
Nanomaterial synthesis, end-product formulation, and nanomaterials’ wide range of applications are outpacing regulations and standard methods. No matter what your nano-end-product application may be, from food to pharmaceuticals to petrochemicals, there are seven key characteristics [...]
Single Particle Resolution Zeta Potential Technique
A novel addition to a technique for the analysis of nanoparticles in a suspension is described. The Nanoparticle Tracking Analysis (NTA) technique visualizes then sizes individual nanoparticles, based on their Brownian motion. Unlike classical light [...]
Using proton NMR to characterize functionalized single-walled carbon nanotubes
Single-walled carbon nanotubes (SWCNTs) can be functionalized covalently at SWCNT ends, covalently at SWCNT sidewalls, or by complexation with SWCNT sidewalls. Each type of product has a wide range of applications, but sometimes the full [...]
Dispersing carbon nanotubes in polymer nanocomposites: detecting individually dispersed tubes
Carbon nanotubes (CNTs) are used to make polymer composites conductive. Small amounts of CNTs (0.1-1 wt%) increase the conductivity by several orders of magnitude. The electrical percolation threshold depends strongly on the dispersion state of [...]
Synthesis of Polypyrrole within Polymeric Nanotemplates in Aqueous Environment
cations (1-2). Polypyrrole is one of the most studied conducting polymers due to its good electrical conductivity, environmental stability and relatively easy synthesis (3-6). Earlier we reported an innovative way of synthesizing polypyrrole within nanotemplates [...]
Mechanical properties of PECVD Si3N4 thin films with rapid thermal annealing using finite element simulation
The entire study includes Si3N4 specimen fabrication, material and mechanical characterization, a new physical model derivation, as well as the corresponding finite element analysis (FEA) and simulations. Nevertheless, the standard method used for nanoindentation were [...]
Laser Postionization Secondary Neutral Mass Spectrometry for Analysis on the Nanometer-Scale – the Followup
Veryovkin I.V., Baryshev S.V., Zinovev A.V., Tripa C.E., Peng Q., Elam J.W., Pellin M.J., Argonne National Laboratory, US
Depth resolution on the order of a few atomic layers has been demonstrated by initial tests of the dual beam sputter depth profiling with the SARISA laser post-ionization secondary neutral mass spectrometry instrument, which was [...]
Nano-mapping Material Interfaces via Hot Electrons
As devices shrink below 100 nm in size, nanoscale imperfections (due to defects and doping) at material interfaces become significant perturbations to ideal device characteristics and in some cases can dominate the device behavior. Of [...]
Passive Microrheology : Non Intrusive Measurement of the Emulsions Stability
This work presents a new technique of the passive microrheology for the study of the microstructure properties of soft materials like emulsions. Our technology uses Multi Speckle DWS (MS-DWS) set-up in backscattering with a video [...]
Passive Microrheology : Non Contact Measurement of Viscoelastic Properties of Biopolymers
This work presents a new technique of the passive microrheology for the study of the microstructure properties of soft materials. Our technology uses Multi Speckle DWS (MS-DWS) set-up in backscattering with a video camera. It [...]
A Novel Method for Measuring the Sizes and Concentrations of 5-500 nm Particles in Colloidal Suspensions
A new measurement technique has been developed that allows for measurement of particles as small as 5 nanometers in colloidal suspensions. The technique has demonstrated the ability to provide unique and useful particle size distribution [...]
Structural and Mechanical Changes in Heart Mitochondria of Rat by AFM
Lee G.J., Lee J.W., Chae S.-J., Kang S-W, Lee G.J., Lee J.W., Ha S.J., Kim W., Kim Y., Kim W., Kim Y., Park H.K., Kyung Hee University, KR
Mitochondria play critical roles in both the life and death of cardiac myocytes. Various factors such as loss of ATP synthesis and increase of ATP hydrolysis, impairment in ionic homeostasis, formation of reactive oxygen species [...]
Nano-imprinting technology applied in pentacene films
The control of polymorphism in organic semiconductor films has attracted considerable interest for improvement in the device performance. In the present study, nano-imprinting technology is used to control polymorphism in pentacene film. Furthermore, we demonstrate [...]
Microstructure and tribological properties of CrTiAlN nanoscale composite coatings on 65Mn steels deposited by multi arc ion plating technology
In order to improve the life of piston rings, a multicomponent CrTiAlN composite coatings with different chemical composition are deposited on the surface of 65Mn steels by multi-ion plating technology in a gas mixture of [...]
Role of Hard Segment Induced Nanosized Domain on Concentrated Solutions and Bulk Properties
Lem K.W., Lee D.S., Haw J.R., Song G.S., Curran S., Sund S., Iqbal Z., Brumlik C., Konkuk University, KR
When a film is cast from solution, the volume fraction of polymer in the film increases with increasing drying temperature and/or time. Its viscoelastic behavior transitions from more viscous (where G” > G’) in dilution [...]
Fabrication and Characterization of pH-Responsive, Nanoparticle-Attached Porphyrins for Singlet Oxygen Production
The goal of this work was to understand if singlet oxygen (1O2) production from an immobilized dye could be regulated directly on support media such as titania and silica. Two types of pH- responsive, nanoparticle-attached [...]
A Study on Fabrication of Cellulose Nanofibers in Water
Cellulose nanofibers (CNFs) were successfully fabricated by fibrillation of wood pulp cellulose into submicron and/or nanoscale nanofibers with a microfluidizer in water solution. CNFs have the great potential as reinforcing materials for polymeric composite materials. [...]
Preparation of Ag/TiO2/bamboo charcoal composite based on chemical and electrochemical synthesis: characterization and antibacterial study
A combined function of photocatalysis, antibacterial, and adsorption was introduced as a composite powder in the form of Ag/TiO2/BC. The powder was characterized by SEM, TEM, and XRD for confirmation of the obtained product. The [...]
siRNA Delivery Using Biodegradable Nanoparticles for Breast Cancer Therapy
Polyethylenimine (PEI)-coated human serum albumin (HSA) nanoparticles form suitable biocompatible carriers for therapeutic molecules. Small interfering RNA (siRNA) molecules have suggested great promise as a future therapy for breast cancer. In order to overcome the [...]
Attachment of Quantum dots and gold nano particles on ZnO nanorods and nanotubes
ZnO nanorods grown by hydrothermal technique are of great interest for potential applications in photovoltaic and optoelectronic devices. In this study we investigate the Optimization of the optical absorption properties by a wet chemical bath [...]
Development of high performance MWCNTs-dispersed-media
Owing to the superior structural, electrical and mechanical properties of carbon nanotubes, many potential applications, such as electric conductive plastics, electromagnetic absorber, heater, lithium ion battery, heat sink and high strength composites have been proposed. [...]
Development of the high performance GFRP with multiwall carbon nanotubes
Owing to the structural and mechanical properties of multiwall carbon nanotubes (MWCNTs), composites of MWCNTs are studied. However there is are few reports describing that MWCNTs without chemical modification is effective to mechanical properties of [...]
Magnetic Nano-Structures Growing by Laser Ablation Deposition
Results of SmCo nanostructures growing by laser ablation deposition are presented. The magnetic nanostructures are deposited on Silicum (111) and on polymer makrolon substrates. The laser ablation magnetic nanostructures properties are performed using electron scanning [...]
Effect of surface reconstruction on the growth of self-assembled Ag nanostructures on Si(111) surfaces
In this work, we have shown that how buried interface structure of Si(111) surface influence the growth of Ag nanostructure growth. Electronic growth modes for Ag on Si(111)-7x7 surface can only be observed if the [...]
Influence of oxygen vacancies on electronic and magnetic
This original experimental research work foused on Ni doped SnO2 diluted magnetic nanorods with various invetigated results. A careful analysis has been done to understand phase purity, distribution of oxygen vacancacies and surface effects. In [...]
Uniqueness of intraband plasmon dispersion of a single layer graphene
Shin S.Y., Hwang C.G., Sung S.J., Lee P.L., Kim J.G., Kim N.D., Kim J.G., Kim N.D., Chung J.W., Pohang University of Science and Technology, KR
we studied the dispersion of intraband plasmon excitation of a single layer graphene(SLG) formed on 6H-SiC(0001) surface by using high-resolution electron energy loss spectroscopy. The dispersion w(q) measured from SLG appears to be quite different [...]
The Effects of gamma-ray Radiation on n-channel MOSFET
The response of an n-channel MOSFET to different energy gamma-ray irradiation is investigated as a function of dose rate. The radiation deposits energy by causing ionization in the oxide layer of the device. The ionization [...]
Residual Stress Dependency on Wafer Location of Thin Film PECVD Silicon Nitride
The residual stress of use plasma enhanced chemical vapor deposition (PECVD) silicon nitride has been investigated in the past. The majority of these studies utilize bulk stress measurements through wafer curvature, assuming that the residual [...]
Synthesis and characterization of La0.75Sr0.25Cr0.5Mn0.5O3- nanoparticles using combustion method
La0.75Sr0.25Cr0.5Mn0.5O3-δ (LSCM) perovskite phase nanoparticles were successfully synthesized by solution combustion method using different carriers (NTP, oxalic acid, and citric acid) after calcination of fired gel at 1200 ºC for 7h. Scanning electron microscopy (SEM) [...]
Electromagnetic wave shielding effectiveness of SWNT-coated, transparent, conducting panels
Needs for electromagnetic wave shielding/absorbing have been increased in order to prevent electromagnetic interference, eavesdropping, and harmful effects to human bodies (Chung, 2001; Kim and Lee, 2008). Single-walled carbon nanotubes (SWNTs) have been well-known for [...]
Physical stability of nanoparticle dispersion
Nanoparticles applications in the industry are getting more and more important and concern many different fields (drug delivery, carbon nanotubes, display technologies, etc.). In the last decades a vast amount of scientific research has been [...]
Scanning Probe Microscopy Study of M13 on Graphite
In this work, we use a combination of atomic force microscope (AFM) and scanning tunneling microscope (STM) to study the structure and binding of wild-type M13 bacteriophage adsorbed on freshly cleaved graphite in ambient condition. [...]
Controllable growth of ZnO nanorod-carbon nanotube heterojunction arrays by low-temperature wet chemical bath deposition method for using in dye solar cell
Dehghan Nayeria F., Asl Soleimania E., Darbaria S., Sabbaghzadehb J., Mohajerzadeha S., Tehran of University, IR
In this paper, we describe a cost-effective and efficient approach for the large-scale synthesis of heterojunctions between ZnO NRs and MWCNTs. Our work represents a new type of heterostructure with many benefits. The wet chemical [...]
A Novel Approach for Modeling Mechanical Behavior of Porous Media
A multi-scale novel homogenization technique is introduced to model mechanical behavior of open-cell porous media. The proposed method has primarily three components. The first component is based on two assumptions. First, a random porous structure [...]
Journal: TechConnect Briefs
Volume: 1, Nanotechnology 2011: Advanced Materials, CNTs, Particles, Films and Composites
Published: June 13, 2011
Industry sector: Advanced Materials & Manufacturing
Topic: Materials Characterization & Imaging
ISBN: 978-1-4398-7142-3