unique advantages comparable to other chemical methods such as rapid and high purity process[20], especially, laser ablation in liquid that has more efficiancy than ablation under gas atmosphere[21]. However, recently, most of researchers synthesized alumina nanoparticles using short pulse laser ablation which the pulse length of microsecond to nanosecond[22-23]
In this paper. B-ALO's nanoparticles were synthesized from bulk aluminum in deionized water using long pulsed laser ablation which barely reports the literatures. Size and morphology of alumina nanoparticles were investigated by field emission scanning electron microscopy The chemical position of the nanoparticles was analyzed using ergy-dispersive X-ray spectroscopy EDX.Their optical properties were carried out using uv-Visible spectroscopy. The phase of the alumina nanoparticles was investigated using X-ray diffraction analysis(XRD).