Field emission study of pulsed laser deposition of gold on clean and oxidized tungsten tip

作者：Plsek J^*

来源：Applied Surface Science, 2014, 292: 717-725.

DOI：10.1016/j.apsusc.2013.12.039

• Nanoparticles
• Nucleation and growth
• Pulsed laser deposition
• Work function
• Field emission microscopy

Growth of gold overlayers on a clean and oxidized tungsten tip has been studied by Field Emission Microscopy. Gold was deposited by conventional vacuum evaporation (VE) and by pulsed laser deposition (PLD) method using a Nd:YAG laser. The effect of the applied deposition method on gold growth was examined and the influence of high-kinetic energy particles produced by PLD in vacuum on the morphology and size of prepared gold nanostructures is discussed. PLD of gold on oxidized tungsten tip resulted in a significant reduction of the oxide layer. Presence of He (similar to 5 mbar) during PLD decreased the kinetic energy of the species arriving at the substrate and resulted in gold growth similar to that we observed for conventional VE.

• 出版日期2014-2-15