Fluorocarbon plasma etching of Si/SiGe heterostructures is demonstrated as a method for fabrication of quantum devices with vertical sidewalls. The heterostructures consist of layers of Si and SiGe, and anisotropic et...
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In this work, the photoluminescence（PL） of NaScP2O7：Eu^2＋ and NaScP2O7：Eu^2＋,Mn^2＋ was investigated. Phase purity was checked using X-ray powder diffractometry（XRD）. PL excitation and emission spectra were re...
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In this work, the photoluminescence（PL） of NaScP2O7：Eu^2＋ and NaScP2O7：Eu^2＋,Mn^2＋ was investigated. Phase purity was checked using X-ray powder diffractometry（XRD）. PL excitation and emission spectra were recorded to elucidate the PL properties of NaScP2O7：Eu^2＋ and NaScP2O7：Eu^2＋,Mn^2＋. Furthermore, fluorescence lifetime measurements were performed. PL and lifetime measurements were carried out from 10 to 525 K. Moreover, the Eu^2＋ site occupation was discussed. It turned out that the incorporated Eu^2＋ ions substituted for Na＋ site and occupied two different sites. Temperature dependent PL measurements indicated the emission intensity decreased with increasing temperature due to temperature quenching in NaScP2O7：Eu^2＋. Fluorescence lifetimes of Eu^2＋ in NaScP2O7：Eu^2＋ almost did not change with a decay constant τ=~0.53 μs in the temperature range of 10–280 K, and then shortened due to temperature quenching. The luminescent lifetime reached ~0.05 μs at T=525 K. Finally, it was found that energy transfer occurred from Eu^2＋ to Mn^2＋ in co-doped NaScP2O7：Eu^2＋,Mn^2＋.
Field-effect devices constructed from van der Waals (vdW) materials with hexagonal boron nitride (hBN) as gate dielectrics usually exhibit negligible hysteresis, enabling exquisitely detailed studies of diverse gate-v...
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The aim was to investigate particles of poly (methylmethacrylate) (PMMA) prepared by suspension polymerization using different concentration of a stabilizer and by varying of the agitation speed at 300, 400, and 500 r...
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There is a growing interest in Zn1-xBexO (ZBO)/ZnO heterostructures and quantum wells since the band gap energy of ZBO solid solutions can be tuned over a very large range (3.37-10.6 eV) as a function of the Be compos...
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An organic semiconductor with high carrier mobility and efficient light absorption over a wide spectral range is of the most important yet challenging material for constructing a broadband responsive organic ***,the d...
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An organic semiconductor with high carrier mobility and efficient light absorption over a wide spectral range is of the most important yet challenging material for constructing a broadband responsive organic ***,the development of such organic semiconductors,especially for air-stable n-type organic small molecule semiconductors,is still at an early *** we report the fabrication of high-performance n-type semiconducting crystalline nanosheets and the development of air-stable field-effect transistors,phototransistors,with high response over a broad *** n-type small molecule semiconductor is assembled into a crystalline nanosheet based on the solvent-phase interfacial self-assembly method.N-type field-effect transistors with high electron mobility are fabricated and their electrical performances exhibit excellent air ***,the demonstrated phototransistors exhibit an ultrahigh responsivity over a wide spectral range from 365 to 940 nm,with a maximum photoresponsivity of 9.2×10^(5) AW-1 and specific detectivity of 5.26×10^(13) Jones,which is the best performance among the reported n-type organic small molecule-based phototransistors.
Aluminum doped hydroxyapatite （HA：AI3 ＋） nanopowders were successfully prepared via a simple and efficient one-pot mechanochemical route. The effects of dopant loading on phase compositions and structural features...
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Aluminum doped hydroxyapatite （HA：AI3 ＋） nanopowders were successfully prepared via a simple and efficient one-pot mechanochemical route. The effects of dopant loading on phase compositions and structural features were assessed by Rietveld analysis. The XRD-Rietveld refinement revealed the stabilization of HA in hexagonal structure for all the samples. The sharpness and intensity of the apatite-derived XRD peaks decreased as the dopant content increased to 10% due to the increase in lattice imperfections and mechanically induced amorphization. The incorpo- ration of A13 ＋ into the HA lattice decreased the unit cell parameters. From the FfiR measurements, the representing bands of apatite were identified in all cases. The mechanosynthesized nanopowders consisted of nanospheroids with an average size of 44 - 20 nm and therefore are promising for bone tissue regeneration.
Instantaneous control over the orientation of anisotropically shaped plasmonic nanostructures allows for selective excitation of plasmon modes and enables dynamic tuning of the plasmonic *** we report the synthesis of...
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Instantaneous control over the orientation of anisotropically shaped plasmonic nanostructures allows for selective excitation of plasmon modes and enables dynamic tuning of the plasmonic *** we report the synthesis of rod-shaped magnetic/plasmonic core-shell nanocomposite particles and demonstrate the active tuning of their optical property by manipulating their orientation using an external magnetic *** further design and construct an IR-photoelectric coupling system,which generates an output voltage depending on the extinction property of the measured nanocomposite *** employ the device to demonstrate that the nanocomposite particles can serve as units for information encryption when immobilized in a polymer flm and additionally when dispersed in solution can be employed as a new type of magnetic-feld-direction sensor.
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