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Guided assembly of nanoparticles on electrostatically charged nanocrystalline diamond thin films.

Verveniotis E, Kromka A, Ledinský M, Cermák J, Rezek B - Nanoscale Res Lett (2011)

Bottom Line: We apply atomic force microscope for local electrostatic charging of oxygen-terminated nanocrystalline diamond (NCD) thin films deposited on silicon, to induce electrostatically driven self-assembly of colloidal alumina nanoparticles into micro-patterns.We demonstrate that electrostatic potential contrast on the NCD films varies between 0.1 and 1.2 V and that the contrast of more than ±1 V (as detected by Kelvin force microscopy) is able to induce self-assembly of the nanoparticles via coulombic and polarization forces.This opens prospects for applications of diamond and its unique set of properties in self-assembly of nano-devices and nano-systems.

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Affiliation: Institute of Physics ASCR, Cukrovarnicka 10, 16253, Prague 6, Czech Republic. verven@fzu.cz.

ABSTRACT
We apply atomic force microscope for local electrostatic charging of oxygen-terminated nanocrystalline diamond (NCD) thin films deposited on silicon, to induce electrostatically driven self-assembly of colloidal alumina nanoparticles into micro-patterns. Considering possible capacitive, sp2 phase and spatial uniformity factors to charging, we employ films with sub-100 nm thickness and about 60% relative sp2 phase content, probe the spatial material uniformity by Raman and electron microscopy, and repeat experiments at various positions. We demonstrate that electrostatic potential contrast on the NCD films varies between 0.1 and 1.2 V and that the contrast of more than ±1 V (as detected by Kelvin force microscopy) is able to induce self-assembly of the nanoparticles via coulombic and polarization forces. This opens prospects for applications of diamond and its unique set of properties in self-assembly of nano-devices and nano-systems.

No MeSH data available.


Typical micro-Raman spectrum (UV laser, λ = 325 nm) on the employed nanocrystalline diamond thin films.
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Figure 2: Typical micro-Raman spectrum (UV laser, λ = 325 nm) on the employed nanocrystalline diamond thin films.

Mentions: Figure 2 shows a typical micro-Raman spectrum of the NCD film. It exhibits clear sp3 peak at 1332 cm-1 indicating diamond character. Note that repeating the measurement on different spots across the sample indicated slight differences in the sp2 (graphitic) phase content. The calculated relative percentage of the sp2 phase from Raman spectra [[Isp2/(ID + Isp2)] * 100] [24] is ranging between 58 and 60%.


Guided assembly of nanoparticles on electrostatically charged nanocrystalline diamond thin films.

Verveniotis E, Kromka A, Ledinský M, Cermák J, Rezek B - Nanoscale Res Lett (2011)

Typical micro-Raman spectrum (UV laser, λ = 325 nm) on the employed nanocrystalline diamond thin films.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3211194&req=5

Figure 2: Typical micro-Raman spectrum (UV laser, λ = 325 nm) on the employed nanocrystalline diamond thin films.
Mentions: Figure 2 shows a typical micro-Raman spectrum of the NCD film. It exhibits clear sp3 peak at 1332 cm-1 indicating diamond character. Note that repeating the measurement on different spots across the sample indicated slight differences in the sp2 (graphitic) phase content. The calculated relative percentage of the sp2 phase from Raman spectra [[Isp2/(ID + Isp2)] * 100] [24] is ranging between 58 and 60%.

Bottom Line: We apply atomic force microscope for local electrostatic charging of oxygen-terminated nanocrystalline diamond (NCD) thin films deposited on silicon, to induce electrostatically driven self-assembly of colloidal alumina nanoparticles into micro-patterns.We demonstrate that electrostatic potential contrast on the NCD films varies between 0.1 and 1.2 V and that the contrast of more than ±1 V (as detected by Kelvin force microscopy) is able to induce self-assembly of the nanoparticles via coulombic and polarization forces.This opens prospects for applications of diamond and its unique set of properties in self-assembly of nano-devices and nano-systems.

View Article: PubMed Central - HTML - PubMed

Affiliation: Institute of Physics ASCR, Cukrovarnicka 10, 16253, Prague 6, Czech Republic. verven@fzu.cz.

ABSTRACT
We apply atomic force microscope for local electrostatic charging of oxygen-terminated nanocrystalline diamond (NCD) thin films deposited on silicon, to induce electrostatically driven self-assembly of colloidal alumina nanoparticles into micro-patterns. Considering possible capacitive, sp2 phase and spatial uniformity factors to charging, we employ films with sub-100 nm thickness and about 60% relative sp2 phase content, probe the spatial material uniformity by Raman and electron microscopy, and repeat experiments at various positions. We demonstrate that electrostatic potential contrast on the NCD films varies between 0.1 and 1.2 V and that the contrast of more than ±1 V (as detected by Kelvin force microscopy) is able to induce self-assembly of the nanoparticles via coulombic and polarization forces. This opens prospects for applications of diamond and its unique set of properties in self-assembly of nano-devices and nano-systems.

No MeSH data available.