Covalent molecular assembly in supercritical carbon dioxide: Formation of nanoparticles in immobilized dendrimers within a porous silica gel matrix

TEM image of Pd:Pt (1:1) nanoparticles in silica gel; the nanoparticle precursors were impregnated in PAMAM dendrimer immobilized in the silica gel and reduced with dimethyl borane in supercritical CO2.