@Article{JPhysChemC_114_9568, author = {N. Shalkevich and A. Shalkevich and T. B{\"u}rgi}, title = {{Thermal Conductivity of Concentrated Colloids in Different States}}, journal= {J. Phys. Chem. C}, ISSN = {1932-7447}, volume= {114}, number= {21}, pages = {9568-9572}, url = {http://pubs.acs.org/doi/abs/10.1021/jp910722j}, eprint= {http://www.unige.ch/sciences/chifi/publis/refs_pdf/ref01186.pdf}, doi= {10.1021/jp910722j}, abstract = {{The thermal conductivity of concentrated colloids in fluid, glass, and gel states was analyzed. SiO$_2$ colloids at 10-31 vol % and Al$_2$O$_3$ colloids at 4.8 vol % in the fluid, the gel, and the glassy states were studied by dynamic light scattering, rheology, and transmission electron microscopy. Thermal conductivity of the three states was measured as a function of volume fraction. For the fluid and gel states the thermal conductivity increases almost linearly with concentration, reaching roughly 18% enhancement for silica at a volume fraction of 31 vol %. In contrast, in the glass state thermal conductivity strongly decreases with increasing volume fraction.}}, year = {2010} }