Papers:
Advanced nanoscale elastic property measurement by contact-resonance atomic force microscopy
In the past few years, we have improved and developed the capabilities of CR-AFM in various ways: established clear criteria for assessing the precision and accuracy in CR-AFM measurements, introduced a load-dependent CR-AFM protocol suitable [...]
Nanoscale Chemical Spectroscopy with the Atomic Force Microscope
The ability to unambiguously identify arbitrary material under the tip of an AFM has been identified as one of the “Holy Grails” of probe microscopy. While the AFM has the ability to measure mechanical, electrical, [...]
Subsurface characterization of high dielectric nanostructures in low dielectric polymer matrix using Electric Force Microscopy and Scanning Electron Microscopy
Zhao M., Ming B., Stutzman P., Chen G., Gu X., Park C., Jean Y.C., Nguyen T., National Institute of Standards and Technology, US
Scanning Probe Microscopy (SPM) and Scanning Electron Microscopy (SEM) are two powerful techniques for surface characterization of nanostructures. With the development of nanotechnology, there is a growing need to nondestructively characterize nanostructures at the subsurface [...]
Mechanical Characterization of Metallic Nanowires by Combining Atomic Force Microscope (AFM) and Scanning Electron Microscope (SEM)
Mechanical characterization of nanowires still poses challenges due to their small length scale. Existing nanowire mechanical characterization techniques in literature can be grouped as: 1) resonation of nanowires in an electron microscope, 2) mechanical characterization [...]
Imaging three-dimensional microstructures fabricated by two-photon polymerization using CARS microscopy
Two-photon polymerization (TPP) is an enabling technology that allows fast prototyping of parts with sub-100 nm resolution. Due to its ability to fabricate microstructures with arbitrary three-dimensional geometries, TPP has been employed in diverse fields [...]
Individual SiGe Nanowire Chemical Composition Depth Profiling and Surface Oxidation Analyzed by Auger Electron Spectroscopy
The lateral and depth distributions of the surface oxidation and the surface Phosphorous doping concentrations have been measured from an individual SixGe(1-x) 60 nm diameter nanowire with Auger Electron Spectroscopy combined with sputter ion depth [...]
Advances in Helium Ion Microscopy for High Resolution Imaging and Material Modification
Thompson W., Notte J., Scipioni L., Ananth M., Stern L., Sijbrandij S., Sanford C., Carl Zeiss SMT, US
The helium ion microscope routinely obtains sub-nanometer resolution on uncoated soft materials with a high signal to damage ratio. In addition to its high resolution imaging capability, the microscope has been successful at sub-nanometer film [...]
Atomic scale dopant detection in an individual silicon nanowire by atom probe tomography
Chen W-H, Lardé R., Cadel E., Xu T., Grandidier B., Nys J.P., Pareige P., Groupe de Physique des Matériaux, FR
The atom probe tomography is a three-dimensional high resolution analytical microscope that can map the distribution of atoms in semiconductor materials such as silicon nanowires.
In-situ Surface Characterization of Nano- and Microparticles by Optical Second Harmonic Generation
We use optical Second Harmonic Generation (SHG) to probe different kinds of surface properties of dispersed particle systems in in-situ and in real time. Examples for applications are the direct study of molecular adsorption at [...]
Size and Count of Nanoparticles by Scattering and Fluorescence Nanoparticle Tracking Analysis (NTA)
A novel addition to a technique for the analysis of nanoparticles in a suspension is described. The Nanoparticle Tracking Analysis (NTA) technique sizes individual nanoparticles, based on their Brownian motion. Unlike classical light scattering techniques, [...]
Conformation of pH Responsive Alternating Copolymers and Self-Assembly in Nanoarchitectures
Our research focuses on the characterization of the association and the properties in aqueous solution of nanostructures composed of amphiphilic alternating copolymers. These copolymers are composed of a pH sensitive hydrophilic group, maleic anhydride alternating [...]
Intense room-temperature photoluminescence of crystalline β-Ta2O5 nanobrick arrays
In this study we analyzed the structural, electronic, and photoluminescence (PL) properties of a new morphological form, stacking Ta2O5 nanobrick arrays that were synthesized by hot filament metal-oxide vapor deposition. Field-emission scanning electron microscopy (FESEM) [...]
Nano-scale TEM studies of the passive film and the chloride-induced depassivation of carbon steel in concrete
In the highly alkaline environment of concrete, carbon steel rebar is protected against corrosion by a passive iron oxide film. The partial or complete loss of the protective oxide film, known as depassivation, leads increased [...]
Enhanced ferromagnetism and weak polarization of multiferroic BiFeO3 synthesized by sol-gel auto-combustion method
BiFeO3 nanoparticles and ceramics were prepared by sol-gel auto-combustion method. Optimal conditions for the synthesis of pure BiFeO3 nanoparticles were experimentally obtained by X-ray diffraction patterns analysis. Scanning electronic microscope was used to investigate microstructure [...]
Size distribution determination of nanoparticles and nanosized pores by small-angle X-Ray scattering on a multi-purpose X-ray diffractometer platform
We present the small-angle X-ray scattering (SAXS) technique for the investigation of crystalline and amorphous materials on a mesoscopic length scale ranging from ca. 1 - 100 nm. Dry powders or dispersions of inorganic and [...]
Effect of local curvature on the interaction between hydrophobic surfaces
Hansson P., Swerin A., Thormann E., Claesson P.M., Schoelkopf J., Gane P.A.C., YKI, Institute for surface chemistry, SE
Previous measurements of the attractive interaction between hydrophobic macroscopic surfaces have showed that long-range forces that are considerably stronger than the van der Waals force dominate the interaction Silica nanoparticles have been deposited on substrates [...]
Structural Elucidation of Doxorubicin-Loaded Liposomes by Atomic Force Microscopy in air and water
Tian B.W., Al-Jamal W.T., Stuartb M., Kostarelos K., The School of Pharmacy, University of London, UK
Doxil is a clinically used, FDA-approved liposomal product against cancer. Structural elucidation of liposomal doxorubicin by cryogenic-transmission electron microscopy (cryo-EM) showed that doxorubicin (Dox)form crystal-like structures inside liposomes. Since 1992, cryo-EM has been the only [...]
High resolution imaging of biological materials using hydrophobic carbon nanotube AFM probes
Carbon nanotube (CNT) tipped atomic force microscope (AFM) probes have shown a significant potential for obtaining high resolution imaging of nanostructure and biological materials. In this work, we report a simple method to fabricate single-walled [...]
Dynamics of intermediate to late stage concentration fluctuations during free diffusion experiments
Two experiments were performed using shadowgraph visualization technique in order to study the dynamics of concentration fluctuations. Our experimental setup includes an objective attached to the CCD camera to increase the field of view. Using [...]
Effects of Non-radiative energy transfer processes on the visible upconversion in ZrO2:Yb3+/Er3+ nanocrystals
Meza O., Diaz-Torres L.A., Salas P., De la Rosa E., Solis C.D., Centro de Investigaciones en Optica A C, MX
The luminescence dynamics of both near infrared (NIR) and visible (VIS) emission of Yb3+,Er3+ in nanocrystalline ZrO2 is studied. It is found that upconversion emission is dominated by back transfer processes over direct Yb to [...]
Acyl ascorbate in enzymatic synthesis: Industrial use as a food nano additive
Nanoadditive Acyl ascorbates were synthesized through the condensation of various fatty acids with L-ascorbic acid using immobilized lipase in a water-soluble organic solvent, and their properties as food additive were examined. The optimal conditions, which [...]
Method of enhancing polyaniline conductivity using different oxidizing agents as dopant
The synthesis and characterization of Polyaniline pellets has been analyzed by using three different oxidizing agents like Ammonium per oxy disulphate (APS), Hydrogen per oxide and Potassium dichromate. Samples of different molar ratios of Aniline [...]
Synthesis of Magnetically Separable Photocatalyst-TiO2/SiO2 coated Mn-Zn Ferrite-and its Photocatalytic study
Laohhasurayotin K., Pookboonmee S., Viboonratanasri D., National Science and Technology Development Agency, TH
A manganese-zinc ferrite as a magnetically separable photocatalyst was synthesized by simple co-precipitation and the following silica as well as titanium dioxide coating through sol-gel techniques. The nanoparticle was found to be well induced by [...]
Effect of compounding method on the thermal, mechanical, and molphological properties of Polypropylene-Nanoclay nanocomposites
This study investigates the effects of direct melt compounding, masterbatch dilution and compatibilzer addition on the mechanical and morphological properties of organoclay nanocomposites. Nanoclay reinforced Polypropylene composites were manufactured using melt mixing with and without [...]
High Strain Rate Compression Behavior of Conventional and CNF-Filled-Nanophased Glass/Polyester Composites
Hossain M.E., Hossain M.K., Hossain M.E., Hossain M.K., Hosur M., Jeelani S., Rangari V., Tuskegee University, US
A high intensity ultrasonic liquid processor was used to infuse carbon nanofibers (CNFs) into polyester matrix that was then mixed with hardener using a high speed mechanical agitator. The trapped air and reaction volatiles were [...]
In-situ techniques in optical spectroscopy for the analysis of carbon nanotubes
Optical Spectroscopy has shown promise as a fundamental characterization tool for carbon nanotubes (CNTs). With the potential of CNTs being utilized for aerospace applications, in-situ techniques including temperature and strain measurements with spectroscopy, are gaining [...]
Synthesis and Characterizations of nano sized Barium hexa-ferrites using sol gel method
Nanosized Barium Hexaferrites were synthesized by sol gel auto combustion method. Samples of different composition with varying molar ratio of metal nitrates and citric acid i.e. (MN_A= 0.5, 1, 1.5, 2, 3) were prepared. Pellets [...]
Fabrication of bulk Al-TiB2 nanocomposite by spark plasma sintering of mechanically alloyed powder
In situ Al-TiB2 nanocomposite was synthesized by mechanical alloying (MA) of pure Ti, B and Al powder mixture and consolidated by spark plasma sintering (SPS).The structural characteristics of powder particles and sintered samples were studied [...]
Fabrication and Thermomechanical Characterization of CNF-Filled Polyester and E-Glass/Polyester Nanophased Composites
Hossain M.E., Hossain M.K., Hossain M.E., Hossain M.K., Hosur M., Jeelani S., Rangari V., Tuskegee University, US
A high intensity ultrasonic liquid processor was used to infuse CNFs into the polyester matrix which was then mixed with catalyst using a high speed mechanical agitator. Results showed the significant improvement of mechanical properties [...]
The Effects of POSS on the Interlaminar Shear Strength of Marine Composites under Various Environmental Conditions
The fiber/matrix (F/M) interface of carbon/vinyl ester composites has been modified by treating the carbon fiber with polyhedral oligomeric silsesquioxane (POSS). The objective was to improve the durability of the F/M interface in various environments. [...]
Volume Grain Analysis in Organic Thin Film Semiconductors
The grain structure of organic thin films is quantitatively studied and includes the precise grain area and volume distributions. The grain morphology affects the device performance of gas sensors and organic solar cells due to [...]
Characterization of an electrical powering nano-generator based on aluminum doped ZnO thin films
Muñoz Aguirre N., Rivera López J.E., Martínez Pérez L., Tamayo Meza P., Instituto Politecnico Nacional, MX
Conductive Atomic Force Microscopy (c-AFM) [1][2] characterization was made on Aluminum doped ZnO thin films. Furthermore, to the electrical resistance associated to the surface of the film, was in series connected a load resistance as [...]
Growth and optical properties of high-density InN nanodots
Ke W.C., Lee S.J., Lee T.C., Kao C.Y., Chen W.K., Cheng Y.C., Chou W.C., Chang W.H., Lin J.C., Lin W.J., Cheng Y.C., Lee S.J., Lee T.C., Lin J.C., Lin W.J., Yuan Ze University, TW
High density InN/GaN nanodots were successfully grown by pulsed mode (PM) metal organic chemical vapor deposition (MOCVD). InN nanodots density of up to ~5×1010 cm-2 at a growth temperature of 550 ℃ was achieved The [...]
Theoretical Studies in Epitaxial Stabilization of ZnO-based Light-emitting Semiconductors
The device quality ZnO films are expected to next generation materials applied in the field of photo-electronic devices. We find that (0001)-oriented ZnO, Zn0.875Be0.125O, Zn0.875Mg0.125O, and Zn0.875Al0.125O strained layer lattices soften as lattice parameter of [...]
Magnetic properties of Sputter deposited and magnetically annealed IrMn/CoFeB nanometric bilayers for exchange biased magnetic tunnel junctions
Fulara H., Raju M., Chaudhary S., Kashyap S.C., Pandya D.K., Inidan Institute of Technology Delhi, IN
The work relates to the exploring the means of controlling the coercivities of the ferromagnetic thin films in a Magnetic Tunnel Junction Stack. Exchange bias route is a very powerful route in achieving this task. [...]
Synthesis and Characterization of ZnO Nanorods using Molecular Beam Epitaxy
ZnO nanorods stand out as one of the most important candidates for next generation opto- and nano electronics. Synthesis of high quality and stable ZnO nanorods remains a challenge thus far. Similarly fabrication of thermally [...]
Novel Nanoparticles Dispersing Beads Mill with Ultra Small Beads and its Application
We have developed the new type of beads mill and succeeded to solve the many problems for nanoparticles dispersion such as reaglomeration and the damage of crystal structure of nanoparticles. We use the centrifugation technology [...]
Evaluation of Tools for Nanoparticles-modulated Hyperthermia by Atomic Force Microscopy
Reshetov I.V., Chissov V.I., Sukharev S.S., Matorin O.V., Korizky A.V., P.A.Hertzen Moscow Research Oncological Institute (MROI), RU
Some of the properties of the medicinal forms and tools, supposed to be used as hyperthermia modulators, can be evaluated by the atomic force microscopy (AFM): sizes and concentration of nanoparticles, their capability for the [...]
Laser-Induced Breakdown Spectroscopy (LIBS) for on-line monitoring and workplace surveillance of nanoparticle production processes
Today, nanotechnology is a growing field of research and nanoparticle-based material production is expected to soar in years to come. The development of robust and reliable technologies for detection and measurement of airborne nanoparticles is [...]
Application of nanoindentation for constituent phases testing
Development of advanced composites requires a detailed knowledge of their constituents’ properties as they are often somewhat different from the materials at their bulk form. In the present study, the nanoindentation techniques of two different [...]
Evaluation of Uncertainty in Nanoparticle Size Measurement by Differential Mobility Analysis
Lin C-M, Yu T.-C., Lai S.H., Ho H.C., Weng H.F., Wang S-H., Chen C-J., Center for Measurement Standards, Industrial Technology Research Institute, TW
This paper presents the measurement results and the uncertainty analysis for four batches of polystyrene latex (PSL) spheres with nominal sizes of 20 nm, 100 nm, 300 nm and 500 nm using the measurement system [...]
Nano Crystalline Cellulosic Nematic monocrystals optical properties
Magnificent opalescent effects are observed from the interaction between light and Nano Crystalline Cellulose (NCC). Leaving a thin liquid NCC suspension to slowly evaporate, a dry polycrystalline nematic cholesteric wafer was obtained. It was observed [...]
Interfacial Effect in Fe/ InGaAs Magnetism
Berrouachedi N., Rioual S., Lescop B., Rouvellou B., Langlois J., Bouslama M., Lounis Z., Abdellaoui A., ENSET d’Oran, DZ
The characterization of Ferromagnet / Semiconductor interfaces Fe/In0.5Ga0.5As system has been a topic of great interest because of the possible future development of spintronics, e.g., spin injection through the ferromagnetic thin film to the semiconductor. [...]
Journal: TechConnect Briefs
Volume: 1, Nanotechnology 2010: Advanced Materials, CNTs, Particles, Films and Composites
Published: June 21, 2010
Industry sector: Advanced Materials & Manufacturing
Topic: Materials Characterization & Imaging
ISBN: 978-1-4398-3401-5