Mechanism of laser-induced nanomodification on hydrogen-passivated Si(100) surfaces underneath the tip of a scanning tunneling microscope

H., Z.; Lu, Yongfeng; Huang, Su; Chim, W. K.; Pan, Ji Sheng

doi:10.1116/1.1303815

Cited by 16 publications

(9 citation statements)

References 18 publications

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“…The laser-heated area could chemically react with the oxygen in air and this reaction led to the formation of silicon oxides layer. These results were found by Mai et al [39] during their study on a laser-induced nano-modification on a silicon surface beneath an STM tip in ambient air.…”

Section: Comparison Between Gold and Silicon Ablation At λ Laser = 26supporting

confidence: 73%

“…The dimensions of these craters remained constant up to 600 laser pulses. It is important to note that by increasing the number of laser pulses, the sample properties were likely to change and a silicon oxide layer could be formed since the ablation was carried out in air [38][39]. This could be the origin of the observed crater formations on silicon after 200 laser pulses with a wavelength of 532 nm.…”

Section: Silicon Crater Dimensions For the Two Wavelengthsmentioning

confidence: 99%

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Development of a tip enhanced near-field laser ablation system for the sub-micrometric analysis of solid samples

Jabbour

Lacour

Tabarant

et al. 2016

J. Anal. At. Spectrom.

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Section: Comparison Between Gold and Silicon Ablation At λ Laser = 26supporting

confidence: 73%

Section: Silicon Crater Dimensions For the Two Wavelengthsmentioning

confidence: 99%

Development of a tip enhanced near-field laser ablation system for the sub-micrometric analysis of solid samples

Jabbour

Lacour

Tabarant

et al. 2016

J. Anal. At. Spectrom.

View full text Add to dashboard Cite

show abstract

“…The optical field could be enhanced by two orders of magnitude [14]. Therefore, the enhanced optical field can heat the sample surface to induce phase change or a chemical reaction and modify the surface at nanoscales [7,12,13,[15][16][17][18][19][20][21][22]. In the work by Chimmalgi et al [21] and Huang et al [22], a laser-assisted atomic force microscope (AFM) was used, which plays the same role as the laserassisted STM in terms of optical field enhancement.…”

Section: Introductionmentioning

confidence: 99%

Large-scale molecular dynamics simulation of surface nanostructuring with a laser-assisted scanning tunnelling microscope

Wang

2005

J. Phys. D: Appl. Phys.

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In this work, large-scale molecular dynamics simulations are conducted to explore the thermal and mechanical phenomena in surface nanostructuring with a laser-assisted scanning tunnelling microscope. Employing a super parallel computer, more than 200 million atoms are modelled to provide substantial details about how the localized thermal and mechanical perturbations result in surface nanostructures. Extremely localized stress accumulation beneath the sample surface leads to an explosion of the melted/vaporized material, leaving a nanoscale hole in the sample surface. Normal and shear stress development are observed. Stress propagation in space is strongly influenced by the anisotropic nature of the crystal. The high pressure in the melted/vaporized region pushes the melt adjacent to the solid to move, thereby forming a protrusion at the edge of the hole. More importantly, visible sub-surface nanoscale structural damages are observed in a direction 45˚with respect to the axial direction. Detailed study of the lattice structure reveals atomic dislocations in the damaged regions. Both temporary and permanent structural damages are observed in the material. The temporary structural damage is featured with a formation, propagation and disappearing procedure.

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“…1 Therefore, the enhanced optical field can heat the sample surface below the tip to induce phase change or chemical reaction and modify the surface at nanoscales. [2][3][4][5][6][7][8][9][10][11][12] In the works of Chimmalgi et al 11 and Huang et al, 12 a laser-assisted atomic force microscope ͑AFM͒ was used, which plays the same role as the laser-assisted STM in terms of optical-field enhancement. Comprehensive and detailed information on the laserassisted STM and the involved physical mechanisms can be found in a review by Grafström.…”

Section: Introductionmentioning

confidence: 99%

Solidification and epitaxial regrowth in surface nanostructuring with laser-assisted scanning tunneling microscope

Wang

2005

Journal of Applied Physics

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In this work, parallel molecular-dynamics simulation is conducted to study the long-time ͑up to 2 ns͒ behavior of argon crystal in surface nanostructuring with a laser-assisted scanning tunneling microscope. A large system consisting of more than 1 ϫ 10 8 at. is explored. The study is focused on the solidification procedure after laser irradiation, which is driven by heat conduction in the material. Epitaxial regrowth is observed in the solidification. Atomic dislocation due to thermal strain-induced structural damages is observed as well in epitaxial regrowth. During solidification, the liquid is featured with decaying normal compressive stresses and negligible shear stresses. Two functions are designed to capture the structure and distinguish the solid and liquid regions. These functions work well in terms of reflecting the crystallinity of the material and identifying the atomic dislocations. The study of the movement of the solid-liquid interface reveals an accelerating moving speed in the order of 3-5 m / s. The spatial distribution of the moving speed at the solid-liquid interface indicates a nonuniform epitaxial regrowth in space. The bottom of the liquid solidifies slower than that at the edge.

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Mechanism of laser-induced nanomodification on hydrogen-passivated Si(100) surfaces underneath the tip of a scanning tunneling microscope

Abstract: Articles you may be interested inIsolating, imaging, and electrically characterizing individual organic molecules on the Si(100) surface with the scanning tunneling microscope

Cited by 16 publications

References 18 publications

Development of a tip enhanced near-field laser ablation system for the sub-micrometric analysis of solid samples

Development of a tip enhanced near-field laser ablation system for the sub-micrometric analysis of solid samples

Large-scale molecular dynamics simulation of surface nanostructuring with a laser-assisted scanning tunnelling microscope

Solidification and epitaxial regrowth in surface nanostructuring with laser-assisted scanning tunneling microscope

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