Materials Characterization & Imaging – Page 58

Nano-Diamond compressibility at pressures up to 85 GPa

Pantea C., Zhang J., Qian J., Zhao Y., Migliori A., Grzanka E., Palosz B., Wang Y., Zerda T.W., Liu H., Ding Y., Stephens P.W., Botez C.E., Los Alamos National Laboratory, US

According to the core-shell model nanocrystals consist of a uniform core surrounded by a surface shell. Crystallographic structure of the surface shell is the same as that of the core but interatomic distances in the [...]

Testing the validity of small angle and adsorption-based characterization techniques by atomic-scale simulation

Pellenq R.J.-M., Coasne B., Centre de Recherche en Matière Condensée et Nanosciences, CNRS, FR

This work aims at testing small angle scattering and adsorption/desorption-based characterization techniques routinely used for nanoporous material characterization (specific surface and pore size distribution measurements). For that purpose, we report Grand Canonical Monte Carlo results [...]

The use of PDF analysis to investigate local structure and domains

Paglia G., Bozin E.S., Billinge S.J.L., Michigan State University, US

Knowledge of the atomic-scale structure is an important prerequisite to understand and control the properties of materials. The main techniques used to determine atomic structure are x-ray, neutron and electron diffraction from which the Bragg [...]

Instability in flatband votlage of SiO2 embedded with silicon nanocrystals

Ng C.Y., Wong J.I., Yang M., Chen T.P., Nanyang Technological University, SG

In this work, the stability of the flatband voltage due to the Si-ions implantation into the SiO2 and subsequent annealing is being studied. There are lack of study on the impact of different annealing temperature [...]

Sol-gel synthesis and photoluminescent characteristics of Eu doped Gd2O3 nanophosphors

Lin C.C., Lin K.M., Lin C.C., Lin K.M., Li Y.Y., Lin C.C., Lin K.M., National Chung Cheng University, TW

Eu-ion doped Gd2O3 nanophosphor powders were prepared by sol-gel method using GdCl3 and EuCl3 at 800-1100 oC. The size of phosphors was about 50-200nm depending on the synthesis temperature for 2hr. Nanophosphors was examined by [...]

Experimental mechanical stress characterization of MEMS by using of confocal laser scanning microscope with a Raman spectroscopy interface

Yamaguchi M., Ueno S., Miura I., Erikawa W., Technical Research Institute Japan Society for the promotion of machine industry, JP

In this study, we demonstrate mechanical stress and shape profile measurements using confocal laser scanning microscopy (CLM) interface for Raman spectroscopy and that this system is reasonable and helpful to the MEMS designer. By combining [...]

Investigation of the Piezoresistive Properties of Nano Structured Amorphous Carbon for Force Sensor Applications

Lüthje H., Biehl S., Bandorf R., Sick J.-H., Peiner E., Tibrewala A., Fraunhofer IST, DE

In this contribution we report on investigations of the nano structure, morphology and nano topography of amorphous carbon films with respect to the piezo resistive, electrical and mechanical properties. Therefore a-C, a-C:H and doped a-C:H:X [...]

Evidence of surface defects in ultrathin tetrahedral amorphous carbon films probed by x-ray absorption spectroscopy

Roy S.S., McCann R., Papakonstantinou P., Abbas G.A., McLaughlin J.A., University of Ulster, UK

The ta-C films with thickness in the range of 1-10 nm were obtained by FCVA and investigated by NEXAFS and Raman spectroscopies. The C=C bonds were quantitatively determined from the area of pi* peak in [...]

Electron Energy-Loss Spectroscopy: Measuring Optical Properties at the Nanometre Scale

Keast V., Bosman M., University of Sydney, AU

Electron energy-loss spectroscopy (EELS) is widely used to study the composition and electronic structure of materials at the nanometre scale. The low-loss region of the EEL spectrum (< ~50 eV) is of particular interest for [...]

Linear and Nonlinear Optical Properties of Palladium Nanoparticle Reinforced Fluoropolymer Composites

Spicer J., See K., Katsumi Y., Zhang D., Brupbacher J., Vargo T., John's Hopkins University, US

The linear optical properties of a functionally graded, palladium nanoparticle reinforced fluorinated ethylene polymer matrix nanocomposite (PMNC) were investigated in this work. Synthesized through repeated infusions of a palladium organometallic precursor gas into an insulating, [...]