Efficient Fabrication of Self Organised Nanostructures

C.C. Keen, Z. Na
National University of Singapore,

Keywords: pulsed laser deposition, quantum dot, self-organized structure


This invention relates to a single-step method of fabricating low dimensional nanostructures from transition metals like gold using pulsed laser deposition (PLD). In PLD, a small laser erodes or ablates a target material. The ablated material is then deposited onto a heated substrate—which can take the form of a semiconductor or an oxide (e.g: MgO)—to form nanostructures like QDs. Nanostructures fabricated are self-organised single-crystals that are spin-polarised and orbital-ordered.