Gold-enhanced oxidation of silicon nanowires
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Peter Werner
Abstract
Silicon nanowires are frequently grown involving a liquid gold droplet at their tips. Here we show that under certain circumstances the thermal oxidation of a silicon nanowire is drastically enhanced by the presence of this gold droplet. Such a gold-enhanced oxidation was observed in a temperature range from 1000 °C down to 250 °C. As a consequence, instead of the slow radial oxidation expected and desired for thinning the nanowires, a fast axial oxidation may occur catalyzed by the gold tip. This leads to a shrinking of the length of the Si nanowire and its replacement by a longer nanowire consisting of silicon dioxide. During this gold-enhanced oxidation process the gold droplet migrates from the tip to the base of the nanowire. Our experiments demonstrate that gold droplets lead to an enhanced dissolution of silicon during oxidation in the case that these remain in intimate contact with the Si nanowires.
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© 2007, Carl Hanser Verlag, München
Artikel in diesem Heft
- Contents
- Contents
- Editorial
- Professor Dr. phil. Dr. techn. e. h. Hellmut F. Fischmeister
- Basic
- Compressive deformation of lamellar microstructures – a short review
- Influence of external and internal length scale on the flow stress of copper
- Spinodal decomposition of cubic Ti1−xAlxN: Comparison between experiments and modeling
- Combined ab-initio and N-K, Ti-L2,3, V-L2,3 electron energy-loss near edge structure studies for TiN and VN films
- Gold-enhanced oxidation of silicon nanowires
- Numerical determination of parameterised failure curves for ductile structural materials
- Relaxation of semiconductor nanostructures using molecular dynamics with analytic bond order potentials*
- Examination of phase transformations in the system Fe–N–C by means of nitrocarburising reactions and secondary annealing experiments; the α + ∊ two-phase equilibrium
- Applied
- On the evolution of secondary hardening carbides in a high-speed steel characterised by APFIM and SANS
- Silicon nitride tools for hot rolling of high-alloyed steel and superalloy wires – load analysis and first practical tests
- Development of the unloading stiffness during cyclic plastic deformation of a high-strength aluminium alloy in different tempers
- Enhanced thermal stability of a cobalt–boron carbide nanocomposite by ion-implantation
- Experimental studies and thermodynamic simulation of phase transformations in high Nb containing γ-TiAl based alloys
- Kinetics of nanoscale structure development during Mg-vapour reduction of tantalum oxide
- On the interaction of ductile damage and materials softening of a Ni-base alloy during hot deformation
- Adhesive contact between flat punches with finite edge radius and an elastic half-space
- Notifications
- DGM News
Artikel in diesem Heft
- Contents
- Contents
- Editorial
- Professor Dr. phil. Dr. techn. e. h. Hellmut F. Fischmeister
- Basic
- Compressive deformation of lamellar microstructures – a short review
- Influence of external and internal length scale on the flow stress of copper
- Spinodal decomposition of cubic Ti1−xAlxN: Comparison between experiments and modeling
- Combined ab-initio and N-K, Ti-L2,3, V-L2,3 electron energy-loss near edge structure studies for TiN and VN films
- Gold-enhanced oxidation of silicon nanowires
- Numerical determination of parameterised failure curves for ductile structural materials
- Relaxation of semiconductor nanostructures using molecular dynamics with analytic bond order potentials*
- Examination of phase transformations in the system Fe–N–C by means of nitrocarburising reactions and secondary annealing experiments; the α + ∊ two-phase equilibrium
- Applied
- On the evolution of secondary hardening carbides in a high-speed steel characterised by APFIM and SANS
- Silicon nitride tools for hot rolling of high-alloyed steel and superalloy wires – load analysis and first practical tests
- Development of the unloading stiffness during cyclic plastic deformation of a high-strength aluminium alloy in different tempers
- Enhanced thermal stability of a cobalt–boron carbide nanocomposite by ion-implantation
- Experimental studies and thermodynamic simulation of phase transformations in high Nb containing γ-TiAl based alloys
- Kinetics of nanoscale structure development during Mg-vapour reduction of tantalum oxide
- On the interaction of ductile damage and materials softening of a Ni-base alloy during hot deformation
- Adhesive contact between flat punches with finite edge radius and an elastic half-space
- Notifications
- DGM News
