Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2012-02-03
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
23 pages, 6 Figures, 1 Table
Scientific paper
We report on the formation of lobe-lobe (bi-lobed) Au-Ge nanostructures under ultra high vacuum (UHV) conditions (\approx 3\times 10^{-10} mbar) on clean Si(100) surfaces. For this study, \approx 2.0 nm thick Au samples were grown on the substrate surface by molecular beam epitaxy (MBE). Thermal annealing was carried out inside the UHV chamber at temperature \apprx 500{\deg}C and following this, nearly square shaped Au_{x}Si_{1-x} nano structures of average length \approx 48 nm were formed. A \approx 2 nm Ge film was further deposited on the above surface while the substrate was kept at a temperature of \approx 500{\deg}C. Well ordered Au-Ge nanostructures where Au and Ge residing side by side (lobe-lobe structures) were formed. In our systematic studies, we show that, gold-silicide nanoalloy formation at the substrate (Si) surface is necessary for forming phase separated Au-Ge bilobed nanostructures. Electron microscopy (TEM, STEM-EDS, SEM) studies were carried out to determine the structure of Au - Ge nano systems. Rutherford backscattering Spectrometry measurements show gold inter-diffusion into substrate while it is absent for Ge.
Dash J. K.
Juluri R. R.
Mueller Knut
Rath Ashutosh
Rosenauer A.
No associations
LandOfFree
Nano scale phase separation in Au-Ge system on ultra clean Si(100) surfaces does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Nano scale phase separation in Au-Ge system on ultra clean Si(100) surfaces, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Nano scale phase separation in Au-Ge system on ultra clean Si(100) surfaces will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-4156