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Nanoparticles of aluminum oxide partially coated with silver were obtained by the radiation-chemical method in size 50 and 80 nm, and the coating area was 2-3% and 16-40%, respectively. The stability of the suspension before irradiation using different stabilizers was studied. The reason for the color change of suspensions after sonication is determined. The antibacterial activity of the composite nanopowder was investigated on wine yeast.

The principal possibility of the composite particles production by the radiation-chemical method was shown. The composite particles were obtained in the nanoscale range ( 60 — 80 nm) from aluminum oxide partially coated with silver. The coating percentage was from 2 — 3% to 16 — 40%. The high efficiency of the production method was demonstrated. The ability to control the deposition process and the type of silver coating by changing the deposition time had also been established.