Sz. Wang et Hw. Xin, Fractal and dendritic growth of metallic Ag aggregated from different kinds of gamma-irradiated solutions, J PHYS CH B, 104(24), 2000, pp. 5681-5685
With gamma-irradiation on AgNO3 dissolved in deionized water, ethanol, and
0.01 M C12H25NaSO4, metallic Ag with different dispersed states and particl
e sizes was obtained. In the former two solvents, metallic Ag particles pre
cipitated From the solutions and the Ag particle size was about 100 and 20
nm, respectively. In the latter solvent, Ag colloid was produced. The morph
ology of structures formed during two-dimensional aggregation of Ag particl
es in three different solvents was studied by transmission electron microso
copy (TEM). The patterns were dendrite, fractal (with center), and fractal
(no center) with the fractal dimension of 1.81, 1.73, and 1.70 correspondin
g to the aggregating structure from deionized water, ethanol, and 0.01 M C1
2H25NaSO4 solutions, respectively. The formation mechanism of different pat
terns was illustrated from different aspects.