Progress in nanoparticles characterization: Sizing and zeta potential measurement
β Scribed by Renliang Xu
- Publisher
- Elsevier
- Year
- 2008
- Tongue
- English
- Weight
- 194 KB
- Volume
- 6
- Category
- Article
- ISSN
- 1674-2001
No coin nor oath required. For personal study only.
β¦ Synopsis
Characterization of various nanoparticles is on the center stage in nanotechnology development. The subjects for nanoparticles characterization are focused on particle size and particle surface charge determinations. This article summarizes the latest development in particle size analysis using dynamic light scattering and surface charge determination using electrophoretic light scattering for nano-or even sub-nanoparticles in concentrated suspensions.
π SIMILAR VOLUMES
The effect of nanoparticle concentration on zeta-potential measurement results at dilute concentrations was evaluated. The values of the zeta-potential for four different types of nanoparticles, Ludox (silica), multi-walled carbon nanotubes (bamboo-shaped and hollow nanotubes) and gold, at various c
Oxide surfaces are covered with hydroxyl groups. In contact with water, positive or negative surface charges can be developed. The surface charge of oxide particles can be fine-tuned by changing the calcination temperature of the oxides before dispersion in water or by variation of the suspension pH
## Abstract Electrophoresis in capillary and microfluidic systems, used in analytical chemistry to separate charged species, are quite sensitive to surface phenomena in terms of separation performances. In order to improve theses performances, new surface functionalization techniques are required.
## Abstract **Summary:** Surfaces of PTFE were modified by polychromatic UV irradiation in the presence of hydrazine vapors. The surfaces were characterized by FTIR and XP spectroscopy as well as by zetaβpotential and contact angle measurements. FTIR spectroscopy revealed that β in addition to the