Monodispersed Colloidal
Spheres: Old Materials with New Applications
by Younan Xia, Byron Gates,
Yadong Yin and Yu Lu,
University of Washington
Advanced
Materials, 2000, 12 N°10 p 693-713
|
-
"Monodispersed
colloidal particles have emerged as the material of choice
for a wide variety of niche applications that range from
nanopatterning to fabrication of photonic devices".
The authors describe and discuss several methods used to
produce monodispersed colloidal spheres, how to assemble
them to useful 2D and 3D ordered lattices and highlights a
number of unique applications of these crystalline
assemblies including photonic band gap crystals, removal templates, physical masks for lithography patterning. (148
references)
An excellent review paper
(don't miss it !)
Dr's Xia research group : http://faculty.washington.edu/~yxia/
Silica encapsulation of
quantum dots and metal clusters
by P. Mulvaney, L.M. Liz-Marzan,
M. Giersig and T. Ung
University of Melbourne
J. Mater.
Chem., 2000, 10, p1259-1270 |
To
prevent aggregation surface properties of the
nanoparticles are usually modified in situ or by a post
treatment with organic capping agents. The authors
describe here an elegant way to stabilize metal and
semiconductors clusters with the help of an inorganic
capping technique using nanometer thick silica
shells. High fluorescence yields of capped quantum dots
and 2D and 3D arrays constructions are demonstrated and
the potential advantages of the technique discussed. (60
references)
Pictures of fluorescent
quantum dots can be found at the research group web site :
Nanoparticle
laboratory*
|
