Papers:
Agglomerates and Aggregates: Number and Size of Primary Particles from in-situ Mass-Mobility Measurements
Gas-borne nanoparticles generated at high temperatures undergo coagulation forming agglomerates (physically-bound particles) and aggregates (chemically- or sinter-bound particles). The structure of such particles influences their transport, light scattering, effective surface area and density. Real-time characterization [...]
Highly Stable PEGylated Gold Nanoparticles in water: Applications in biology and catalysis
Rahme K., Nolan M.T., Doody T., McGlacken G.P., O’Driscoll C., Holmes J.D., Notre Dame University (NDU), LB
Gold nanoparticles (Au NPs) with diameters ranging between 5-60 nm have been synthesised in water. Functionalised polyethylene glycol-based thiol polymers (mPEG-SH) were used to stabilise the pre-synthesised Au NPs. The grafting density of different PEG [...]
Experimental Determination of Conduction and Valence Bands of Semiconductor Nanoparticles using Kelvin Probe Force Microscopy
Determination of the band gaps (Eg), positions of conduction and valence bands (Ev and Ec) is critical for the understanding of many photochemical processes (e.g., photocatalyst synthesis for decomposing organic compounds or splitting water for [...]
Synthesis and Characterization of Graphene Thin Films via Hummer’s Method
Thema F.T., Moloto M.J., Nyangiwe N.N., Khenfouch M., Maaza M., Kotsedi L, Dikio E.D., Vaal University of Technology, ZA
Graphene oxide (GO) and reduced graphene oxide (RGO) were synthesized by Hummer’s method and characterized by X-ray diffraction (XRD), Attenuated total reflectance (ATR), Fourier transform infrared spectroscopy (FT-IR), Ultra-violet visible spectroscopy (UV-vis), Atomic Force Microscopy [...]
Comparison of Anchoring Materials for High Performance Sensors Modified with Nanoparticles and Enzymes
We have previously developed some of the most sensitive biosensors/electrodes modified by Au nanoparticles and enzymes that are capable of detecting concentration levels below ppb. These sensors were fabricated with composite layers of nanomaterials and [...]
3D Metrology of sub-60 nm Isolated Lines Using TSOM Optical Method
In the current world of nanotechnology, fast and reliable 3D measurement of nanoscale features is extremely useful. Furthermore, it if the analytical tools used are cost effective and have high throughput–such as optics-based tools. In [...]
Seeing the invisible – ultrasonic force microscopy for true subsurface elastic imaging of semiconductor nanostructures with nanoscale resolution
Scanning probe microscopes (SPM’s) are indispensable in modern nanoscale science but ability of SPM’s to look below the surface is unavoidably limited. In spite of developments based on Ultrasonic Force Microscopy (UFM) a true subsurface [...]
Multi-Parameter Characterization of Nanoparticle Dispersions by Size, Count and Scattering Intensity
Nanoparticle Tracking Analysis (NTA) is a method that has gained increasing popularity for the study of nanoparticle dispersions, providing high-resolution particle size analysis as well as a direct measure of particle count or concentration. By [...]
Design of a Small, Battery-Operated Nanoparticle Sizer
A small, portable nanoparticle sizer has been developed to provide an affordable method to measure nanoparticle size distributions. The new nanoparticle sizer incorporates a SMPS Spectrometer into a chassis that is <1 cu.ft. The instrument [...]
Spectroscopic study on the charge redistribution between Au and Ag in Au@Ag core-shell nanoparticles
Nishimura S., Anh D.T.N., Mott D., Ebitani K., Maenosono S., Japan Advanced Institute of Science and Technology, JP
Charge transfer in heteromeric structures such as Au@Ag core-shell nanoparticles (NPs) and Au@Ag@Au double-shell NPs was demonstrated using X-ray absorption near-edge structure (XANES) and X-ray photoelectron spectroscopy (XPS) techniques. XANES analyses confirmed that the d-orbital [...]
Multi-Parametric Surface Plasmon Resonance – A new technique to determine thickness and refractive index of thin and thick layers
Multi-Parametric(MP)-SPR empowers multidisciplinary research between life sciences and material sciences. Biochemists are moving from molecular-molecular interactions to molecule-material interactions, as seen in drug encapsulation or development of diagnostic kits. On the other hand, material science [...]
Calculation of Nanoparticle Filler Content in Solid or Liquid Dispersions
Nano composites have unique properties which depend to a large extent on the quality of the nanoparticle dispersion. An outstanding issue is the quantitative measure of fillers that are actually dispersed to dimensions below a [...]
Raman Spectroscopy hyperspectral imager based on Bragg Tunable Filters
A new type of Raman spectroscopy hyperspectral imager based on Bragg tunable filter has been developed by University of Montreal and Photon etc. The technology of Bragg tunable filter significantly reduces the acquisition time by [...]
Comparing Nanorulers for Nanoparticles
Nanoparticle development and manufacturing require particle characterization to determine if design or quality goals are being met. Scattering techniques are the method of choice for analyzing average size and size distribution. There are two light [...]
Photoacoustic Study of CdS quantum Dots for Photovoltaic Applications
Recently, CdS quantum dots (QDs) have become one of the promising materials for high efficiency photovoltiac solar cell.. In this work we investigate the optical properties and photovoltaic characterization of CdS QDs -sensitized solar cells [...]
Lipid Nanoparticles as Novel Carrier for Broad-spectrum Sunscreen Formulations
The most widely used UVA absorber in broad-spectrum sunscreens is 4-tert-butyl-4’-methoxydibenzoylmethane (avobenzone). In the sunlight, however, it will be photolysised rapidly and its photoprotection against UVA will greatly decrease. A photoprotective formulationwas developed with an [...]
Silver Precipitation in Energy-Scavenging Aluminum Nitride Resonators
Despite more than a decade of experience in manufacturing of nanoelectromechanical systems (NEMS) incorporating piezoelectric elements, modern devices are still plagued by delamination at the electrode/piezoelectric interface. Consequently the electric field essential to generate and [...]
Investigation of Optical Properties of layered MoS2
The motivation of the research work to be presented is to investigate in details the optical properties of Molybdenum disulphide. Raman spectrum and Photoluminescence spectrum of few layers of Molybdenum disulphide have been analyzed in [...]
Nano-contacts and Nano-interconnects
This oral paper is the result of nearly 3 years of review and analysis of the state-of-the art of nano-contacts and nano-interconnects. An analysis of over 80 technical articles was performed, including interviews with some [...]
Direct nanoscale 3D characterisation of Ge-Sb-Te and Ge-Te phase change films
DC magnetron sputter-deposited Ge-Sb-Te and Ge-Te based phase change thin films were investigated via a variety of Scanning Probe Microscopy techniques. Micron and sub-micron crystalline and amorphous bit patterns were induced with laser heating and [...]
Electrospun Carbon nanofibers-Based Supercapacitors
For efficient use of conductive polymers, such as Polyaniline (PANI) and Polypyrrole (PPy), in pseudocapacitors and other electrochemical applications, the poor conductivity of the conductive polymers is a major problem. To solve the problem, here [...]
In-situ structural characterization of SWCNTs for probing the polymer/nanorod interactions
Quantitative characterization of the structures of single-walled carbon nanotubes (SWCNTs) in the dispersion is important. It provides critical information for quality assurance of SWCNT dispersions, and more importantly for understanding and optimizing the properties and [...]
Comprehensive Microscopy Analysis of Au/Ag Nanoclusters on Silica Nanospheres
we report a comprehensive structural and morphological analysis of gold (Au) / silver (Ag) nanocluster (shell) on silica (SiO2) nanosphere (core) with transmission electron microscopy (TEM) based techniques, including scanning transmission electron microscopy (STEM) tomography, [...]
Ferromagnetic Resonance in amine/organic acid caped Au-nanoparticles assisted by rare-earths oxides
Lesseux G.G., Iwamoto W., Rosas V.H., Vautier-Giongo C., Rettori C., Rettori D., Rettori C., Rettori D., Universidade Estadual de campinas, BR
Amine/organic acid caped Au-nanoparticles (Au-NPs) were prepared by reducing gold tetrachloroaurate (HAuCl4.3H2O) and rare-earth (RE)-oxides (RE = Er and Y and monodisperse samples of caped Au-NPs of ~10 nm in diameter were obtained. The magnetization [...]
Preparation and Characterization of nZnO/fly ash Composite
Composite material involving fly ash and nZnO was prepared by dispersion technique. The nature, morphology and the properties of the precursors and the composite were determined and compared by scanning electron microscopy, surface area determination [...]
Far-infrared Radiation Properties of Poly(vinyl alcohol) Nanofibrous Membranes Containing Germanium and Silicon Dioxide
Far-infrared radiation effect and antibacterial properties were introduced in PVA nanofibrous membrane using germanium (Ge) and silicon dioxide (SiO2). Composite fibers containing Ge and SiO2 were fabricated at various concentrations of Ge and/or SiO2 using [...]
The Study on Nanocellulose and Their Biocomposites
Lim D.-Y., Yoon M.-J., Yoon S.Y., Yoon M.-J., Yoon S.Y., Kim K-Y, Korea Institute of Industrial Technology, KR
Nanocelluloses with the average diameter below 100nm were successfully obtained by high shear fluid processor, microfluidizer. Their large surface area and the nano-scale dimensions can lead to the emerging materials for reinforcements in polymer composites, [...]
SC-15 Epoxy Reinforced with Magnetic Nanofillers under Uniform Magnetic Field – An Investigation of Anisotropic Physical Properties
Malkina O., Mahfuz H., Sorge K.D., Rondinone A.J., Chen J., Rangari V.K., Florida Atlantic University, US
SC-15 epoxy is used in many industrial applications. It is well known that the mechanical and viscoelastic properties of epoxy can be significantly enhanced when reinforced with nanofillers. In this work, SC-15 epoxy is reinforced [...]
Effect of γ-ray irradiated MWCNTs on electrical conductivity of a PET/graphite composites
The effects of a compoundingmethod and γ-ray treatedmultiwall carbon nanotubes (MWCNTs) on the electrical conductivity of graphite/PET composites were investigated. We found that dispersion of MWCNTs in the PET phase plays a critical role in [...]
The effect of nanoparticles on the translucency and antimicrobial activities of experimental resin cements
The purpose of this study was to evaluate the effect of the nanoparticles in experimental resin cements on opacity (contrast ratio) and antibacterial activities. Experimental resin cements were prepared with three different kinds of fillers: [...]
Characterizing Environmental Transformation of Multi-walled Carbon Nanotubes and Carbon Nano-Fiber Composites using Thermal Analysis and Related Hyphenated Techniques
Sahle-Demessie E., Zhao A., Salamon A.W., Cassel B., Gagliardi N.A., U.S. Environmental Protection Agency, US
Thermogravimetric analysis (TGA) coupled with gas chromatography and mass spectroscopy (TGA/GCMS), for the evolved gas analysis, has given insight to the stability and kinetics of structural changes and determining adsorbed organics to nanomaterials and nanocomposites. [...]
Synthesis and characterization of carbon nanotubes by catalytic decomposition of acetylene with Fe/Co/MgO, Co/Zn/Al and (C5H7O2)3Mn/Al as catalysts
We report our studies on the effect of various catalysts in the synthesis of carbon nanomaterials. The as-prepared carbon nanomaterials were characterized by Raman spectroscopy, high resolution transmission electron microscopy and X-ray diffraction. The catalysts [...]
Platinum Silicide probes: A novel approach to manufacture highly conductive AFM probes with small radii and high wear resistance
Conventionally, conductive Atomic Force Microscopy (c-AFM) probes are either made by depositing a metal, an alloy or a doped diamond layer onto a ready-made AFM probe or, alternatively, by depositing one of those materials into [...]
A facile block copolymer inclusion technique for large scale monodisperse hexagonal arrays of superparamagnetic iron oxides nanodots
We demonstrate a simple and cost-effective route, based around block copolymer patterning, to create dense arrays of highly ordered iron oxide nanodots at substrate surface. The methodology creates hexagonally arranged features via a process of [...]
Hertz Elastic Contact in Spherical Nanoindentation Considering Infinitesimal Deformation of Indenter
Many studies have been performed to identify and analyze unusual nano-scale phenomena. Violation of Hertz elastic contact between the spherical nanoindenter and metallic materials has been discussed in previous studies. The unexpected results obtained using [...]
Electropulsing induced nanophase decomposition and structural characteristics of film of alloy ZA27
Nanophases appear very stable and hardly decompose completely under conventional thermal aging, because of their strong preferred crystal orienttation. As one of the advanced processes, electropulsing has been recognized for its efficiency in reducing residual [...]
Tuning Wettability of Electrospun Three-dimensional Scaffolds through Morphology Control
Surface wettability plays an important role in determining implant’s fate due to direct influence of protein/biomolecule adsorption that governs cell adhesion. The importance of the physical parameters, such as, overall porosity, pore directionality, difference between [...]
The Effect of Growth Temperature on Aluminum Nanocrystal Embedded AlOxNy for Non-Volatile Memory
Chen N.H., Hsieh P-H, Huang F.S., Huang S-J, Huang F.S., Huang S-J, National Tsing Hua University, TW
The aim of this paper is to present a aluminum-based nonvolatile memory of Al2O3 (28 nm)/ Al-rich Al0.54O0.42N0.04 (22 nm)/ Al0.44O0.38N0.18 (3 nm) layered structure on SiO2 (2 nm)/ n-Si by a simple rapid thermal [...]
Mechanical properties of suspended few layers graphene sheets
We present a method for the experimental determination of the mechanical properties of ultrathin films, whichever the material, and a comparative application to graphene sheets obtained with different fabrication and transfer processes.
Adhesion and dynamic nanotribology of graphene in polar and non-polar liquid environments studied with ultrasonic force microscopy
We report the characterisation of exfoliated few layer graphene (FLG) flakes using a range of scanning probe techniques. We have examined the nanoscale mechanical and interfacial properties of FLG and its substrate material, SiO2, in [...]
Journal: TechConnect Briefs
Volume: 1, Nanotechnology 2012: Advanced Materials, CNTs, Particles, Films and Composites (Volume 1)
Published: June 18, 2012
Industry sector: Advanced Materials & Manufacturing
Topic: Materials Characterization & Imaging
ISBN: 978-1-4665-6274-5