Optical properties of self assembled oriented island evolution of ultra-thin gold layers

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• 作者：Christian Worsch ; Michael Kracker ; Wolfgang Wisniewski ; ^{wolfgang.w@uni-jena.de} ; Christian Rü ; ssel
• 关键词：Gold ; Nanoparticles ; Sputtering ; Dewetting ; Color ; Electron backscatter diffraction ; X-ray diffraction ; Scanning electron microscopy
• 刊名：Thin Solid Films
• 出版年：2012
• 出版时间：31 May, 2012
• 年：2012
• 卷：520
• 期：15
• 页码：4941-4946
• 全文大小：1040 K

文摘

Gold layers with a thickness of only 8 to 21 nm were sputtered on soda-lime-silica glasses. Subsequent annealing at 300 and 400 ¡ãC for 1 and 24 h resulted in the formation of separated round gold particles with diameters from 8 to 200 nm. Crystal orientations were described using X-ray diffraction and electron backscatter diffraction. The gold particles are oriented with their (111) planes perpendicular to the surface. Most gold nano particles are single crystalline, some particles are twinned. Thermal annealing of sputtered gold layers resulted in purple samples with a coloration comparable to that of gold ruby glasses. The color can be controlled by the thickness of the sputtered gold layer and the annealing conditions. The simple method of gold film preparation and the annealing temperature dependent properties of the layers make them appropriate for practical applications.