Search results

Sort By:

Limit search:

Modelling of SubPc Self-Assembly on Ag(111)

100%

Petrauskas V., Tornau E., Lapinskas S.

Acta Physica Polonica A

2005

vol. 107

issue 2

388-391

The ordering of subphthalocyanine molecules into honeycomb and hexagonal close packed patterns on Ag(111) is described using complex Lennard-Jones-type intermolecular potential. We rescale Ag(111) lattice, and take into account an infinite exclusion of first, second, and third neighbours, attraction - of fourth and fifth, and repulsion - of sixth and seventh. The phase diagram is obtained by the lattice gas model using Monte Carlo simulations. Very strong first order phase transitions, causing the two-phase co-existence, are found between disordered and honeycomb as well as between disordered and hexagonal closed packed phases.

Optical Properties of Black Silicon with Precipitated Silver and Gold Nanoparticles

100%

Jarimaviciute-Zvalioniene R., Prosycevas I., Kaminskiene Z., Lapinskas S.

Acta Physica Polonica A

2011

vol. 120

issue 5

942-945

Black porous silicon is a new material with low light reflectance and high light absorbance values. Black porous silicon layers are especially useful and important in solar energy conversion. In this work black porous silicon plates were prepared by wet chemical metal-assisted method. Silver and gold nanoparticles were precipitated from colloidal silver nitrate and chloroauric acid solutions. Obtained black porous silicon samples with precipitated nanoparticles were investigated by scanning electron microscope combined with energy dispersive X-ray spectrometer, ultraviolet and visible light spectrometer, the Fourier transformation infrared spectrometer. Scanning electron microscopy and energy dispersive X-ray analysis have revealed the presence of silver and gold nanoparticles on black porous silicon surface. Silver nanoparticles size varied from 30 to 100 nm, gold - from 20 to 70 nm. During UV-VIS analysis significant changes in reflectance of processed black porous silicon samples were obtained. Reflectance of black porous silicon samples was lower than 10%. The Fourier transform infrared analysis has revealed decrease in reflectance in far infrared region. Changes in the Fourier transform infrared spectra in "fingerprint" zone prove modification of the surface of black porous silicon layers after precipitation of metal nanoparticles.

Refine search results

2 Acta Physica Polonica A

1 2011

1 2005

2 Lapinskas S.

1 Jarimaviciute-Zvalioniene R.

1 Kaminskiene Z.

1 Petrauskas V.

1 Prosycevas I.

1 Tornau E.

Search results

Modelling of SubPc Self-Assembly on Ag(111)

Optical Properties of Black Silicon with Precipitated Silver and Gold Nanoparticles