منابع مشابه
A New Intrinsic Magnetic Property Due to the Mesoscopic Ordering of Cobalt Nanocrystals in Supra-Crystals
Recently, it has been shown that nanoparticles with a narrow size distribution can self-organize into highly ordered fcc supra-crystals. This new generation of materials have been found to exhibit unique collective properties, which arise from the periodic ordering of the nanoparticles. Using the expertise we have to control the ordering of cobalt nanoparticles in 3D assemblies, we have been ab...
متن کاملFerromagnetic cobalt nanocrystals achieved by soft annealing approach—From individual behavior to mesoscopic organized properties
By gentle annealing, 7 nm cobalt nanoparticles synthesized by soft chemistry, are transformed to hard magnetic hexagonal close packed (HCP) cobalt nanocrystals without changing the size, size distribution and passivating layer. This method permits to recover the nanocrystals isolated in solution after the annealing process and then to study the magnetic properties of the HCP cobalt nanocrystals...
متن کاملSuperstructures of self-assembled cobalt nanocrystals
Uniform three-dimensional superstructures of spherical cobalt nanocrystals are produced by the interplay between dipolar interaction and applied magnetic field. An anomalous low-temperature magnetic behavior is observed, indicating that uncompensated surface spins become ordered below 10 K, as evidenced by the presence of two magnetic phases that superimpose in hysteresis loops as compared to m...
متن کاملControlled self-assembly of colloidal cobalt nanocrystals
Spherical cobalt particles are synthesized by injecting stock solution (0.54 g Co2(CO)8 dissolved in 3ml 1,2-dichlorobenzene) into refluxing 1,2-dichlorobenzene at 182 C in the presence of 0.2ml oleic acid and 0.1 g TOPO. Disks are prepared in a similar manner except 0.34 g linear amines are substituted for TOPO. We are developing a precipitation technique that is a variation of the solvent–non...
متن کاملModulating the assembly of organic dye molecules on titania nanocrystals via alkyl chain elongation for efficient mesoscopic cobalt solar cells.
Through elongating the end or side alkyl chains of dye molecules, we decorate anatase nanocrystals with a thicker organic assembly featuring a smaller tilt angle of the D-π-A backbone with respect to the surface normal, which retards the interfacial charge recombination and confers a higher photovoltage output on mesoscopic cobalt solar cells displaying an over 10% power conversion efficiency a...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Pure and Applied Chemistry
سال: 2002
ISSN: 1365-3075,0033-4545
DOI: 10.1351/pac200274091707