light scattering – TechConnect Briefs

Helping nano-entities discover their nano-identity

Castro A., Leeman M., Runyon J.R., Nilsson L., Ulmius Storm M., SOLVE Research and Consultancy AB, SE

Nanoscale materials are becoming increasingly prevalent in our lives. The strategies required to characterize the properties and performance of nanoscale materials can be as unique as the material itself. We have experienced that separation of [...]

The influence of technique on the measured particle size distribution of complex nanoparticle systems

Jämting Å.K., Roy M., Catchpoole H.J., Lawn M., Babic B., Coleman V.A., Herrmann J., National Measurement Institute Australia, AU

Accurate and reliable characterization of nanoparticles is crucial for both industrial applica-tions and studies of their toxicological and environmental impacts. Particle size distribution (PSD) has been widely recognised as one of the key parameters that [...]

Extending the Lifetime of Zeta Potential Electrodes

Bodycomb J., Bruno D., Treviranus I., Bumiller M., Horiba Scientific, US

Nanoparticle development and manufacturing require appropriate particle characterization techniques to determine if design or quality goals are being met. One important aspect of many nanoparticle systems is the zeta potential, a measure of surface charge. [...]

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 [...]

Size and Count of Nanoparticles by Scattering and Fluorescence Nanoparticle Tracking Analysis (NTA)

Griffiths D., Hole P., Smith J., Malloy A., Carr B., NanoSight, US

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, [...]

Influence of structural forces and contact hysteresis on flow-induced aggregation and breakage of polymer nanoparticles

Moussa A.S., Ehrl L., Soos M., Lattuada M., Morbidelli M., ETH Zürich, CH

Static light scattering was used on-line to monitor the flow-induced aggregation of surfactant-free polystyrene latexes in a stirred tank. Various latexes with primary particles diameters ranging between 100 and 300 nm, different charge groups, different [...]

Nanoparticle characterization using light scattering technologies

Xu R., Beckman Coulter, Inc., US

To size smaller particles, dynamic light scattering (DLS) that utilizes time variation of scattered light from suspended particles to obtain their hydrodynamic size distribution is the most popular technology. For measuring turbid samples with particle [...]

Nanoparticle Measurement by Spectroscopic Mie Scattering

Trutna R., Liu M., Chamberlin D., Hadley J., Agilent Technologies, US

We present a spectroscopic technique for measuring particle size. The technique utilizes a UV-Visible spectrophotometer to measure the attenuation spectrum of a particle dispersion due to scattering. Using the Mie scattering theory, we compute the [...]

Scattering properties of dense clusters of nanoparticles

Lattuada M., Ehrl L., Soos M., Morbidelli M., ETH Zürich, CH

The use of light scattering or laser diffraction techniques to characterize dense clusters such as those generated in shear induced coagulations is highly desirable. However, a major obstacle in the effective utilization of this technique [...]

Structural and Mechanical Properties of Double Wall Carbon Nanotubes

Bacsa R.R., Bacsa W.S., Flahaut E., Laurent Ch., Peigney A., Puech P., Bacsa R.R., Bacsa W.S., LPST Université Paul Sabatier, FR

Narrow diameter double walled carbon nanotubes can now be grown by the catalytic chemical vapor deposition process with high yield. Double walled carbon nanotubes are the molecular analogs to coaxial cables and they can also [...]