Novel synthesis of monodisperse ZnO-based core/shell ceramic powders and applications in low-voltage varistors

2016 ◽  
Vol 96 ◽  
pp. 329-334 ◽  
Author(s):  
Tao Chen ◽  
Mao-Hua Wang ◽  
Han-Ping Zhang ◽  
Zhong-Yin Zhao ◽  
Ting-Ting Liu
Keyword(s):  
Low Voltage ◽  
Core Shell ◽  
Ceramic Powders ◽  
Novel Synthesis

scholarly journals Novel Synthesis of Core-Shell Silica Nanoparticles for the Capture of Low Molecular Weight Proteins and Peptides

Molecules ◽  
2017 ◽  
Vol 22 (10) ◽  
pp. 1712 ◽  
Author(s):  
Sergio Hernandez-Leon ◽  
Jose Sarabia-Sainz ◽  
Gabriela Montfort ◽  
Ana Guzman-Partida ◽  
Maria Robles-Burgueño ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Silica Nanoparticles ◽  
Core Shell ◽  
Low Molecular Weight ◽  
Novel Synthesis ◽  
Low Molecular Weight Proteins ◽  
Proteins And Peptides

scholarly journals Novel synthesis of superparamagnetic plasmonic core-shell iron oxide-gold nanoparticles

2019 ◽  
Vol 560 ◽  
pp. 85-90 ◽  
Author(s):  
Arne Billen ◽  
Amaury de Cattelle ◽  
Johanna K. Jochum ◽  
Margriet J. Van Bael ◽  
Johan Billen ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Iron Oxide ◽  
Core Shell ◽  
Novel Synthesis

Spherical SiO2 @ GdPO4 : Eu3+ Core–Shell Phosphors: Sol–Gel Synthesis and Characterization

2007 ◽  
Vol 7 (2) ◽  
pp. 542-548 ◽  
Author(s):  
Cuikun Lin ◽  
Bo Zhao ◽  
Zhenling Wang ◽  
Min Yu ◽  
Huan Wang ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Low Voltage ◽  
Uv Light ◽  
Sol Gel ◽  
Emission Spectra ◽  
Core Shell ◽  
Time Resolved ◽  
Potential Applications ◽  
Ft Ir ◽  
Red Luminescence

Nanocrystalline GdPO4 : Eu3+ phosphor layers were coated on non-aggregated, monodisperse and spherical SiO2 particles by Pechini sol–gel method, resulting in the formation of core–shell structured SiO2 @ GdPO4 : Eu3+ particles. X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), photoluminescence (PL), low-voltage cathodoluminescence (CL), time-resolved PL spectra and lifetimes were used to characterize the core–shell structured materials. Both XRD and FT-IR results indicate that GdPO4 layers have been successfully coated on the SiO2 particles, which can be further verified by the images of FESEM and TEM. Under UV light excitation, the SiO2 @ GdPO4 : Eu3+ phosphors show orange-red luminescence with Eu3+ 5D0–7F1 (593 nm) as the most prominent group. The PL excitation and emission spectra suggest that an energy transfer occurs from Gd3+ to Eu3+ in SiO2 @ GdPO4 : Eu3+ phosphors. The obtained core–shell phosphors have potential applications in FED and PDP devices.

scholarly journals Novel Synthesis of Amphiphilic Core-Shell Type Gel

1998 ◽  
Vol 30 (2) ◽  
pp. 155-157 ◽  
Author(s):  
Takashi Iizawa ◽  
Fumihiko Matsuda
Keyword(s):  
Core Shell ◽  
Novel Synthesis ◽  
Shell Type

A Novel Synthesis of Zn2SiO4:Mn@SiO2 Phosphor with ZnS@SiO2 Core–Shell Structure

2012 ◽  
Vol 10 (1) ◽  
pp. 208-212
Author(s):  
Fengqin Zhang ◽  
Xiaolong Li ◽  
Tiaotiao Li ◽  
Nongyue He
Keyword(s):  
Shell Structure ◽  
Core Shell ◽  
Novel Synthesis ◽  
Core Shell Structure

Spherical SiO2 @ GdPO4 : Eu3+ Core–Shell Phosphors: Sol–Gel Synthesis and Characterization

2007 ◽  
Vol 7 (2) ◽  
pp. 542-548
Author(s):  
Cuikun Lin ◽  
Bo Zhao ◽  
Zhenling Wang ◽  
Min Yu ◽  
Huan Wang ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Low Voltage ◽  
Uv Light ◽  
Sol Gel ◽  
Emission Spectra ◽  
Core Shell ◽  
Time Resolved ◽  
Potential Applications ◽  
Ft Ir ◽  
Red Luminescence

Nanocrystalline GdPO4 : Eu3+ phosphor layers were coated on non-aggregated, monodisperse and spherical SiO2 particles by Pechini sol–gel method, resulting in the formation of core–shell structured SiO2 @ GdPO4 : Eu3+ particles. X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), photoluminescence (PL), low-voltage cathodoluminescence (CL), time-resolved PL spectra and lifetimes were used to characterize the core–shell structured materials. Both XRD and FT-IR results indicate that GdPO4 layers have been successfully coated on the SiO2 particles, which can be further verified by the images of FESEM and TEM. Under UV light excitation, the SiO2 @ GdPO4 : Eu3+ phosphors show orange-red luminescence with Eu3+ 5D0–7F1 (593 nm) as the most prominent group. The PL excitation and emission spectra suggest that an energy transfer occurs from Gd3+ to Eu3+ in SiO2 @ GdPO4 : Eu3+ phosphors. The obtained core–shell phosphors have potential applications in FED and PDP devices.

scholarly journals Imaging low-dimensional nanostructures by very low voltage scanning electron microscopy: ultra-shallow topography and depth-tunable material contrast

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Laura Zarraoa ◽  
María U. González ◽  
Álvaro San Paulo
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Low Voltage ◽  
Core Shell ◽  
Contrast Imaging ◽  
Backscattered Electrons ◽  
Low Voltage Operation ◽  
Material Contrast ◽  
Low Dimensional ◽  
Scanning Electron

Abstract We demonstrate the implications of very low voltage operation (<1 kV) of a scanning electron microscope for imaging low-dimensional nanostructures where standard voltages (2–5 kV) involve a beam penetration depth comparable to the cross-section of the nanostructures. In this common situation, image sharpness, contrast quality and resolution are severely limited by emission of secondary electrons far from the primary beam incidence point. Oppositely, very low voltage operation allows reducing the beam-specimen interaction to an extremely narrow and shallow region around the incidence point, enabling high-resolution and ultra-shallow topographic contrast imaging by high-angle backscattered electrons detection on the one hand, and depth-tunable material contrast imaging by low-angle backscattered electrons detection on the other. We describe the performance of these imaging approaches on silicon nanowires obtained by the vapor-liquid-solid mechanism. Our experimental results, supported by Monte Carlo simulations of backscattered electrons emission from the nanowires, reveal the self-assembly of gold-silica core-shell nanostructures at the nanowire tips without any ad-hoc thermal oxidation step. This result demonstrates the capacity of very low voltage operation to provide optimum sharpness, contrast and resolution in low-dimensional nanostructures and to gather information about nanoscaled core-shell conformations otherwise impossible to obtain by standard scanning electron microscopy alone.

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