A novel method for successive preparation of nano metal sols by pulsed laser ablation at the interface of solid and flowing-liquid is developed and nano-iron/ethanol sol is obtained by this method. TEM results show that the iron particles' sizes are mostly between 10-30nm. It is found through FT-IR that the vibration of ethanol molecule groups in the sol is affected by the nano-iron particles. The UV-vis results show that there are one strong absorption peak at 237.82nm and two medium absorption peaks at 272.93nm and 308.43nm. The effect of polyoxyethylene (10) lauryl ether (OP-10) on the disperse stability of nano-iron/ethanol sol is studied by UV-vis and TEM. The results show that the best addition of OP-10 is 0.10% and it can effectively stabilize the dispersity of the nano-iron/ethanol sol.

Key words: PULSE, LASER, NANOPHASE MATERIALS, IRON, SOL, DISPERSION, STABILITY, ETHANOL, ULTRAVIOLET SPECTROPHOTOMETRY, TRANSMISSION ELECTRON MICROSCOPY