Limits...
Catalytic growth of ZnO nanostructures by r.f. magnetron sputtering.

Arroyo-Hernández M, Alvaro R, Serrano S, Costa-Krämer JL - Nanoscale Res Lett (2011)

Bottom Line: The catalytic effect of gold seed particles deposited on a substrate prior to zinc oxide (ZnO) thin film growth by magnetron sputtering was investigated.The ZnO structures are subsequently deposited by r.f. magnetron sputtering in a UHV chamber, and possible morphological differences between the ZnO grown on top of the substrate and on the gold are investigated.The results indicate a moderate catalytic effect for a deposited gold underlayer of 4 nm, quite close to the gold thin film percolation thickness.

View Article: PubMed Central - HTML - PubMed

Affiliation: IMM-Instituto de Microelectrónica de Madrid (CNM-CSIC), Isaac Newton 8, PTM, Tres Cantos, Madrid 28760, Spain. maria.arroyo@imm.cnm.csic.es.

ABSTRACT
The catalytic effect of gold seed particles deposited on a substrate prior to zinc oxide (ZnO) thin film growth by magnetron sputtering was investigated. For this purpose, selected ultra thin gold layers, with thicknesses close to the percolation threshold, are deposited by thermal evaporation in ultra high vacuum (UHV) conditions and subsequently annealed to form gold nanodroplets. The ZnO structures are subsequently deposited by r.f. magnetron sputtering in a UHV chamber, and possible morphological differences between the ZnO grown on top of the substrate and on the gold are investigated. The results indicate a moderate catalytic effect for a deposited gold underlayer of 4 nm, quite close to the gold thin film percolation thickness.

No MeSH data available.


Related in: MedlinePlus

XRD pattern of a 3-nm nominal thickness gold film before (orange) and after (black) thermal annealing.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC3211855&req=5

Figure 2: XRD pattern of a 3-nm nominal thickness gold film before (orange) and after (black) thermal annealing.

Mentions: The XRD spectra show that the evaporated gold is textured (111) with a crystallographic grain size of 27.5 nm (calculated from Equation 1), the same as the morphological value obtained by AFM. After the annealing process, the XRD grain size slightly increases up to 28.2 nm, representative of a moderate effect of the thermal treatment in the crystal quality (Figure 2). This marked difference with the AFM results can be understood in terms of 3D changes produced by the atomic mobility.


Catalytic growth of ZnO nanostructures by r.f. magnetron sputtering.

Arroyo-Hernández M, Alvaro R, Serrano S, Costa-Krämer JL - Nanoscale Res Lett (2011)

XRD pattern of a 3-nm nominal thickness gold film before (orange) and after (black) thermal annealing.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3211855&req=5

Figure 2: XRD pattern of a 3-nm nominal thickness gold film before (orange) and after (black) thermal annealing.
Mentions: The XRD spectra show that the evaporated gold is textured (111) with a crystallographic grain size of 27.5 nm (calculated from Equation 1), the same as the morphological value obtained by AFM. After the annealing process, the XRD grain size slightly increases up to 28.2 nm, representative of a moderate effect of the thermal treatment in the crystal quality (Figure 2). This marked difference with the AFM results can be understood in terms of 3D changes produced by the atomic mobility.

Bottom Line: The catalytic effect of gold seed particles deposited on a substrate prior to zinc oxide (ZnO) thin film growth by magnetron sputtering was investigated.The ZnO structures are subsequently deposited by r.f. magnetron sputtering in a UHV chamber, and possible morphological differences between the ZnO grown on top of the substrate and on the gold are investigated.The results indicate a moderate catalytic effect for a deposited gold underlayer of 4 nm, quite close to the gold thin film percolation thickness.

View Article: PubMed Central - HTML - PubMed

Affiliation: IMM-Instituto de Microelectrónica de Madrid (CNM-CSIC), Isaac Newton 8, PTM, Tres Cantos, Madrid 28760, Spain. maria.arroyo@imm.cnm.csic.es.

ABSTRACT
The catalytic effect of gold seed particles deposited on a substrate prior to zinc oxide (ZnO) thin film growth by magnetron sputtering was investigated. For this purpose, selected ultra thin gold layers, with thicknesses close to the percolation threshold, are deposited by thermal evaporation in ultra high vacuum (UHV) conditions and subsequently annealed to form gold nanodroplets. The ZnO structures are subsequently deposited by r.f. magnetron sputtering in a UHV chamber, and possible morphological differences between the ZnO grown on top of the substrate and on the gold are investigated. The results indicate a moderate catalytic effect for a deposited gold underlayer of 4 nm, quite close to the gold thin film percolation thickness.

No MeSH data available.


Related in: MedlinePlus