Biomedical subjects

L Motte

Publications and source records attributed to L Motte.

8 recordsLinked to original sources

PubMed2005

Silver clusters on silver sulfide nanocrystals: synthesis and behavior after electron beam irradiation.

Nanocomposite crystals, (Ag)(x)(Ag(2)S)(y) with x < y, are synthesized in micellar media. The generation of Ag clusters on Ag(2)S nanocrystals is attributed to the reduction of mobile Ag(+) ions in the Ag(2)S nanocrystals by sulfur derivatives. The proportions in the composite material can be modulated by electron beam irradiation. Using dodecanethiol as surface passivating agent, 2D self-organizations of these nanocomposite crystals are produced.

Electrons↗

PubMed2005

Influence of short-range interactions on the mesoscopic organization of magnetic nanocrystals.

Magnetic fluids of 10-nm maghemite, gamma- Fe2 O3 , nanocrystals, subjected or not to an applied field parallel to the substrate, produce, after evaporation, mesoscopic structures. These differ markedly with the surface coating agent used to prevent particles from coalescence. Citrate ions and carboxylic acids with different chain lengths are employed as coating agents. The change in the mesoscopic structure is studied both experimentally and theoretically. The mesoscopic structures obtained by Brownian dynamics simulations are in good agreement with the experimental observations. In particular, the appearance of chainlike organizations in spite of the particles being weakly dipolar is explained by an interplay of van der Waals and magnetic dipolar interactions.

Journal Article↗

PubMed1980