Nanostructural substance

Details Nanostructural substance Nanostructural substance

2005-10-26

2008-11-11

Richter, Johann (Department: 1616)

Drug, bio-affecting and body treating compositions

Preparations characterized by special physical form

Particulate form

C424S600000, C424S602000, C424S618000, C424S641000, C424S646000, C424S630000, C424S682000

Reexamination Certificate

active

07449199

ABSTRACT:
The present invention relates to a nanostructural substance constituted from primary particles having a particle diameter of not more than 30 nm. In the nanostructural substance of the present invention, the primary particles have a small particle diameter, and a contact surface between the primary particles is small. In particular, since the nanostructural substance of the present invention has a large content of molecules existing at the surface thereof and, therefore, a high surface energy as compared to simple agglomerated particles, it is expected to more remarkably exhibit functions of the compound constituting the primary particles.In addition, titanium oxide particles constituted from the nanostructural substance comprising primary particles having a small particle diameter and a small contact area therebetween according to the present invention exhibit a high catalytic activity and can be suitably used, in particular, as a photocatalyst.

REFERENCES:
patent: 2004/0250750 (2004-12-01), Reda et al.
Turkevich et al, “A Study of the Nucleation and Growth Processes in the Synthesis of Colloidal Gold”, May 18, 1951; Discussion Faraday Soc., 1951, 11, 55-75, DOI 10.1039/DF9511100055.
Creighton et al, “Plasma Resonance Enhancement of Raman Scattering by Pyridine Adsorbed on Silver or Gold Sol Particles of Size Comparable to the Excitation Wavelength”, J. Chem. Soc., Faraday Trans. 2, 1979, 75, 790-798, DOI: 10.1039/F29797500790.

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