Nanoparticles by Continuous-wave Laser Ablation in Liquid

ISBN-13: 9783845414614 / Angielski / Miękka / 2011 / 240 str.

Sohaib Zia Khan

Opis

Laser ablation in liquid is becoming an important technique for the generation of nanoparticles (NPs). Until now only pulsed lasers have been used; this is a pioneer work, using high-power, high-brightness continuous-wave (CW) fibre laser ablation in liquid, for the generation of NPs. A mechanism is proposed based on experimental observations, including high-speed imaging and emission spectroscopic analysis of the ablated plume. Three different target materials (Titanium, Nickel and Alpha-aluminium-oxide), submerged in either water or sodium dodecyl sulphate (SDS) solution at various concentrations were used. The characterisation of the generated metal-oxide NPs, in terms of size, size-distribution, shape, chemical composition and phase structure was carried out by UV-Vis photo-spectroscopy, transmission electron microscopy (TEM), high-resolution TEM with energy-dispersive X-rays spectroscopy and X-ray diffraction. This study paves a route towards a new application of CW fibre lasers. The book is useful to engineering students, professional engineers, researchers, academicians and scientists in materials, NPs characterisation, mechanical, laser processing and related disciplines.

O autorze

He received B.Eng degree (2001) in mechanical engineering from NED University, Pakistan, M.Sc degree (2006) in precision engineer and PhD degree (2010) for work on nanoparticles & CW laser ablation from University of Manchester, UK. Currently, he is an assistant professor at PNEC, National University of Sciences & Technology, Pakistan.