Polymer-assisted synthesis of aligned amorphous silicon nanowires and their core/shell structures with Au nanoparticles

2004 ◽  
Vol 397 (1-3) ◽  
pp. 128-132 ◽  
Author(s):  
Xing-bin Yan ◽  
Tao Xu ◽  
Shan Xu ◽  
Gang Chen ◽  
Qun-ji Xue ◽  
...  
Keyword(s):  
Amorphous Silicon ◽  
Silicon Nanowires ◽  
Au Nanoparticles ◽  
Shell Structures ◽  
Core Shell

Core/shell structured NaYF4:Yb3+/Er3+/Gd+3nanorods with Au nanoparticles or shells for flexible amorphous silicon solar cells

2011 ◽  
Vol 23 (2) ◽  
pp. 025402 ◽  
Author(s):  
Z Q Li ◽  
X D Li ◽  
Q Q Liu ◽  
X H Chen ◽  
Z Sun ◽  
...  
Keyword(s):  
Solar Cells ◽  
Amorphous Silicon ◽  
Au Nanoparticles ◽  
Silicon Solar Cells ◽  
Core Shell

scholarly journals Single-Step Coating of Mesoporous SiO2 onto Nanoparticles: Growth of Yolk-Shell Structures from Core-Shell Structures

Nanoscale ◽  
2021 ◽  
Author(s):  
Xiaobin Xie ◽  
Marijn A. van Huis ◽  
Alfons van Blaaderen
Keyword(s):  
Au Nanoparticles ◽  
Single Step ◽  
Shell Structures ◽  
Great Promise ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Au Nps ◽  
Mesoporous Sio2

Yolk-shell nanoparticles based on mesoporous SiO2 (mSiO2) coating of Au nanoparticles (Au NPs) hold great promise for many applications in e.g., catalysis, biomedicine, and sensing. Here, we present a single-step...

Large-Area Synthesis and Microstructural Investigations of Silicon Nanowires and Te/Bi2Te3-Si Core-Shell Structures

2011 ◽  
Vol 364 ◽  
pp. 243-247
Author(s):  
Inn Khuan Ng ◽  
Kuan Ying Kok ◽  
Siti Salwa Zainal Abidin ◽  
Nur Ubaidah Saidin ◽  
Thye Foo Choo
Keyword(s):  
Silicon Nanowires ◽  
Silicon Nanowire ◽  
Growth Conditions ◽  
Shell Structures ◽  
Core Shell ◽  
Redox Potentials ◽  
Large Area ◽  
Aspect Ratios ◽  
P Type ◽  
Microstructural Studies

Large-area randomly-oriented silicon nanowires (SiNWs) were synthesized using Au-coated p-type Si (100) substrates via the solid-liquid-solid (SLS) process under different growth conditions. Microstructural studies on the NWs produced showed that straight crystalline nanowires of large aspect ratios were generally obtained at a growth temperature of 1000°C along with some worm-like amorphous structures. Large-area vertically aligned silicon nanowire (SiNW) arrays on p-type (001) Si substrates were also synthesized in an aqueous solution containing AgNO3 and HF by self-selective electroless etching. Diameters of the SiNWs produced from both methods varied from 50 nm to 350 nm and their lengths generally extended from several to approximately a few tens of µm depending on the growth conditions used. Te-Si and Bi2Te3-Si core-shell structures were subsequently obtained via galvanic displacement of SiNWs in acidic HF electrolytes containing HTeO2+ and Bi3+/HTeO2+ ions. The reactions were basically a nanoelectrochemical process due to the difference in redox potentials between the materials. The modified SiNWs of core-shell structures had roughened surface morphologies and, therefore, higher surface-to-bulk ratios compared to unmodified SiNWs. They should have potential applications in sensors, photovoltaic and thermoelectric nanodevices. Microstructural studies on the SiNWs and core-shell structures produced are presented using various microscopy, diffraction and probe-based techniques for characterization.

Designing active mats based on cellulose acetate/polycaprolactone core/shell structures with different release kinetics

2021 ◽  
Vol 261 ◽  
pp. 117849 ◽  
Author(s):  
Adrián Rojas ◽  
Eliezer Velásquez ◽  
Constanza Piña ◽  
María José Galotto ◽  
Carol López de Dicastillo
Keyword(s):  
Cellulose Acetate ◽  
Release Kinetics ◽  
Shell Structures ◽  
Core Shell

Bias Dependence of Sub-Bandgap Light Detection for Core–Shell Silicon Nanowires

Nano Letters ◽  
2012 ◽  
Vol 12 (11) ◽  
pp. 5929-5935 ◽  
Author(s):  
Yuchun Zhou ◽  
Yu-hsin Liu ◽  
James Cheng ◽  
Yu-Hwa Lo
Keyword(s):  
Silicon Nanowires ◽  
Core Shell ◽  
Light Detection

scholarly journals A SERS Study of Charge Transfer Process in Au Nanorod–MBA@Cu2O Assemblies: Effect of Length to Diameter Ratio of Au Nanorods

Nanomaterials ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 867
Author(s):  
Lin Guo ◽  
Zhu Mao ◽  
Sila Jin ◽  
Lin Zhu ◽  
Junqi Zhao ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Shell Structure ◽  
Shell Structures ◽  
Core Shell ◽  
Absorption Bands ◽  
Au Nanorods ◽  
The Core ◽  
Band Position ◽  
Surface Enhanced Raman ◽  
Core Shell Structure

Surface-enhanced Raman scattering (SERS) is a powerful tool in charge transfer (CT) process research. By analyzing the relative intensity of the characteristic bands in the bridging molecules, one can obtain detailed information about the CT between two materials. Herein, we synthesized a series of Au nanorods (NRs) with different length-to-diameter ratios (L/Ds) and used these Au NRs to prepare a series of core–shell structures with the same Cu2O thicknesses to form Au NR–4-mercaptobenzoic acid (MBA)@Cu2O core–shell structures. Surface plasmon resonance (SPR) absorption bands were adjusted by tuning the L/Ds of Au NR cores in these assemblies. SERS spectra of the core-shell structure were obtained under 633 and 785 nm laser excitations, and on the basis of the differences in the relative band strengths of these SERS spectra detected with the as-synthesized assemblies, we calculated the CT degree of the core–shell structure. We explored whether the Cu2O conduction band and valence band position and the SPR absorption band position together affect the CT process in the core–shell structure. In this work, we found that the specific surface area of the Au NRs could influence the CT process in Au NR–MBA@Cu2O core–shell structures, which has rarely been discussed before.

The Stabilization of Supported Au Nanoparticles in a Highly Sintering Environment using High Surface Free Energy Pt and Ru Cores

2021 ◽  
Author(s):  
Kerry O-Connell ◽  
John R Monnier ◽  
John Regalbuto
Keyword(s):  
Gold Nanoparticles ◽  
Free Energy ◽  
Surface Free Energy ◽  
Au Nanoparticles ◽  
High Surface ◽  
Chemical Environment ◽  
Core Shell

In an effort to stabilize gold nanoparticles which sinter rapidly in a highly corrosive chemical environment, the hydrochlorination of acetylene, bimetallic Ru@Au and Pt@Au core-shell catalysts were prepared by anchoring...

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