Abstract: Si oxide powder is reduced by highly repetitive pulse laser ablation in liquid, and Si nanoparticles are produced efficiently with a low cost in a short time. A Si nanopaste with highly doped Si nanoparticles was sintered by using a hot plate. We succeeded in fabricating a sintered Si nano-polycrystalline for the first time. The structure and components of the fabricated sintered Si nano-polycrystalline were investigated by SEM and EDX analysis. Furthermore, the reduced Si nanoparticles and the sintered Si nano-polycrystalline were excited by violet light and stable photoluminescence (PL), which were observed in the visible regime. The peak wavelengths of the PL were 550 nm and 560 nm. Particularly, the intensity of the observed PL of the sintered Si nano-polycrystalline was five times higher than that of the reduced Si nanoparticles powder. This result is attributed to the PL being amplified inside the sintered Si nano polycrystalline. These experiments show that because the mean diameters of the Si nanocrystals in the reduced Si nanoparticles were below 2 nm, the structure of the Si nanocrystals changed to a direct-transition type; the bandgap energy of the Si nanocrystals changed from 1.1 eV to 2.25 eV, and PL in the visible regime was generated. Moreover, the possibility of Si photonics is discussed. The sintered Si nano-polycrystalline will be applicable to light waveguides, optical switches using a free carrier effect, and light amplifiersAbstract: Si oxide powder is reduced by highly repetitive pulse laser ablation in liquid, and Si nanoparticles are produced efficiently with a low cost in a short time. A Si nanopaste with highly doped Si nanoparticles was sintered by using a hot plate. We succeeded in fabricating a sintered Si nano-polycrystalline for the first time. The structure and compo...Show More
Eldar Mehrali Gojayev,Khadija Ramiz Ahmadova,Sevinc Sarkar Osmanova,Shujaat Zeynalov Aman
Issue:
Volume 3, Issue 5, September 2015
Pages:
89-93
Received:
21 July 2015
Accepted:
3 August 2015
Published:
19 October 2015
DOI:
10.11648/j.nano.20150305.12
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Abstract: To investigate the effect of semiconductor filler - compounds and aluminum nanoparticles: topography and the nature of the spectra of thermally stimulated depolarization (TSD) of composite materials PE+xvl.%TlInSe2, PE+xvl.%TlInSe2. A technology of producing composite materials studied by atomic force microscopy, the surface microrelief. The polarization of the films was carried out at a constant voltage of 6 kV in 5 min, according to the method of corona discharge. To study the spectra of the TSD used conventional techniques. Analysis of histograms AFM showed that the surface uniformity of the samples varies between 25 nm and in the boundary layer of the compositions there are some roughness caused by the fact that the destruction of the binding forces remain on the surface of individual atoms, and their groups - clusters.Abstract: To investigate the effect of semiconductor filler - compounds and aluminum nanoparticles: topography and the nature of the spectra of thermally stimulated depolarization (TSD) of composite materials PE+xvl.%TlInSe2, PE+xvl.%TlInSe2. A technology of producing composite materials studied by atomic force microscopy, the surface microrelief. The polari...Show More
