Gas-borne particles with tunable and highly controlled characteristics for nanotoxicology studies

Gas-borne particles with tunable and highly controlled characteristics for nanotoxicology studies

For nanotoxicology investigations of air-borne particles to provide relevant results it is ever so important that the particle exposure of, for example cells, closely resembles the "real" exposure situation, that the dosimetry is well defined, and that the characteristics of the deposited nanoparticles are known in detail. By synthesizing the particles in the gas-phase and directly depositing t...

Nanotoxicology: An Emerging Discipline Evolving from Studies of Ultrafine Particles

Although humans have been exposed to airborne nanosized particles (NSPs; < 100 nm) throughout their evolutionary stages, such exposure has increased dramatically over the last century due to anthropogenic sources. The rapidly developing field of nanotechnology is likely to become yet another source through inhalation, ingestion, skin uptake, and injection of engineered nanomaterials. Informatio...

Highly birefringent colloidal particles for tracer studies

We report on the preparation and characterization of highly birefringent, monodisperse colloidal particles with sizes between 100 nm and some micrometres made by emulsification of a reactive acrylate monomer in aqueous solution. Photopolymerization of the emulsion droplets in the liquid crystalline state results in particles with frozen orientational order. Particles that had not been polymeriz...

NANOTOXICOLOGY: An Emerging Discipline Evolving from Studies of Ultrafine Particles Supplemental Web Sections

Plasmonic multi-shell nanomatryoshka particles as highly tunable SERS tags with built-in reporters.

Here we report on the synthesis and averaged SERS measurements of multi-shell nanomatryoshka SERS tags. By tuning the number of shells or by changing the Raman reporters in different gap layers, their Raman intensities and spectral bands were tunable. These tags show great potential for SERS-based biosensing and bioimaging.