characterization – Page 4 – TechConnect Briefs

Efficiency Enhancement of Dye-Sensitized Nanocrystalline Solar Cells Through Fabrication

Ilumoka A.A., UNIVERSITY OF HARTFORD, US

This paper reports results obtained from the investigation of electrical performance of blueberry-based DSSCs and makes recommendations regarding their fabrication, specifically optimal sintering temperature and optimal sintering time. Electrical characteristics (open circuit voltage, short circuit [...]

Measuring the layer thickness of MEMS using torsional resonance

Andrews N.D., Clark J.V., Purdue University, US

In this work we propose a method to measure the structural layer thickness of MEMS using torsional resonance. The thickness of structures often has measurable influences on the mechanical, thermal, and electrical behaviors. Measurement of [...]

Assessing the Antimicrobial Activity of Silver Nanoparticles Leached from Medical Devices

Casey B.J., Dair B.J., U.S. Food and Drug Administration, US

This work focuses on characterization the leachables released from substrates, e.g. medical devices, containing silver nanoparticles. Furthermore, antimicrobial experiments were conducted to determine how the structure of a silver nanoparticle impact antimicrobial activity. Proper characterization [...]

Nanogel Star Polymer Nanostructures of Controlled Size, Molecular Architecture and Functionality: No Assembly Required

Miller R.D., Sly J., Lee V.Y., Appel E., Nguyen T., Nunes H., Tjio M., Gomez L., McNeil M., Munninghoff J., Rowan A.E., IBM Almaden Research Center, US

We have developed versatile routes to nanogel core, multiarm star polymeric unimolecular amphiphiles that provides exquisite control over molecular size, polydispersity, chain and periphery functionality which eliminate the dynamic equilibrium associated with polymeric micelles. . [...]

Length amplification of single walled carbon nanotubes for the enrichment of chiral specific nanotubes

Orbaek A.W., Barron A.R., Rice University, US

At Rice University there is a large body of work relating to the development of an “Armchair Quantum Wire”. This would be composed of armchair SWNTs spun into a fiber, that could span global distances. [...]

Comparing Nanorulers for Nanoparticles

Bodycomb J., Bath F., Treviranus I., Park K., Hou A., Horiba Scientific, US

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 [...]

Multi-Parametric Surface Plasmon Resonance – A new technique to determine thickness and refractive index of thin and thick layers

Robinson M., Kuncova-Kallio J., Granqvist N., Sadowski J.W., BioNavis, LTD, US

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 [...]

Design of a Small, Battery-Operated Nanoparticle Sizer

Erickson K., Johnson J., Grose M., Kolb J., Morell S., Caldow R., TSI Incorporated, US

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 [...]

Multi-Parameter Characterization of Nanoparticle Dispersions by Size, Count and Scattering Intensity

Griffiths D., Bernt W., Hole P., NanoSight USA, US

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 [...]

Role of Hard Segment Induced Nanosized Domain on Dilute Solution Properties of Ether Based Thermoplastic Polyurethanes

Lem K.W., Lee D.S., Haw J.R., Song G.S., Curran S., Sund S., Iqbal Z., Brumlik C., Konkuk University, KR

Many useful polyurethane components, such as films, are prepared from solution, in the form of dispersion, emulsion, or suspension. The ultimate properties of such films depend on the effect of nano scaled structures in the [...]