scholarly journals An electroless-plating-like solution approach for the preparation of PS@TiO2@Ag core–shell spheres

RSC Advances ◽  
2020 ◽  
Vol 10 (16) ◽  
pp. 9341-9346 ◽  
Author(s):  
Chao Wang ◽  
Daichuan Ma ◽  
Xinsheng Li ◽  
Daibing Luo ◽  
Liangzhuan Wu
Keyword(s):  
Electroless Plating ◽  
Hollow Spheres ◽  
Core Shell ◽  
Solution Deposition ◽  
Solution Approach

PS@TiO2@Ag spheres with a core–shell nanostructure were prepared by electroless-plating-like solution deposition (EPLSD) method, which can be alternatively extended to prepare PS@metal(1) oxide@metal(2) composite spheres and their relative hollow spheres.

CORROSION PROTECTION OF ELECTROLESS PLATING Ni-P INCLUDING TiN NANOPARTICLES FOR BIPOLAR PLATES OF PEMFCs

2018 ◽  
Vol 25 (02) ◽  
pp. 1850052 ◽  
Author(s):  
GAO PINGPING ◽  
OUYANG CHUN ◽  
XIE ZHIYONG ◽  
TAO TAO
Keyword(s):  
Corrosion Resistance ◽  
Surface Morphology ◽  
Electroless Plating ◽  
Shell Structure ◽  
Compact Surface ◽  
Proton Exchange ◽  
Core Shell ◽  
Tin Coating ◽  
Sem Images ◽  
Core Shell Structure

The Ni-P/TiN coating was used as bipolar plate by electroless plating on Ti. Surface morphology and phase structure of the coatings were characterized by SEM and XRD, respectively. Corrosion resistance of Ni-P and Ni-P/TiN coating was measured in the simulated solution of Proton exchange membrane fuel cells (PEMFCs). The interfacial contact resistance (ICR) was conducted by applied different forces. SEM images indicated that the particles of core–shell structure were formed on the surface of coating on Ti substrate. The core–shell structure was composed of TiN core and Ni-P electroless plating shell. Compared with Ni-P coatings, the Ni-P/TiN coating showed better corrosion resistance behaviors and low ICR (below 10[Formula: see text]m[Formula: see text][Formula: see text] cm[Formula: see text] under pressure of 200 N/cm[Formula: see text]. TiN particles and distribution of core–shell were in favor of the formation of coating and compact surface morphology. The good conductivity was attributed to the compact surface morphology of coating. The Ni-P/TiN coating showed excellent interfacial conductivity and good corrosion resistance at applied high potential in simulated solution of PEMFCs.

Fabrication of sub-micrometer-sized jingle bell-shaped hollow spheres from multilayered core–shell particles

2004 ◽  
Vol 279 (1) ◽  
pp. 281-283 ◽  
Author(s):  
Shunchao Gu ◽  
Tomohiro Kondo ◽  
Eiichi Mine ◽  
Daisuke Nagao ◽  
Yoshio Kobayashi ◽  
...  
Keyword(s):  
Hollow Spheres ◽  
Core Shell ◽  
Shell Particles

scholarly journals Synthesis and Control of the Shell Thickness of Polyaniline and Polypyrrole Half Hollow Spheres Using the Polystyrene Cores

2012 ◽  
Vol 2012 ◽  
pp. 1-9 ◽  
Author(s):  
Su-Ryeon Yun ◽  
Gyeong-Ok Kim ◽  
Chan Woo Lee ◽  
Nam-Ju Jo ◽  
Yongku Kang ◽  
...  
Keyword(s):  
Shell Thickness ◽  
Hollow Spheres ◽  
Core Shell ◽  
Chemical Structures ◽  
The Core ◽  
Vis Spectroscopy ◽  
Ft Ir ◽  
Core Shell Structure ◽  
And Control ◽  
Ft Ir Spectroscopy

Polyaniline (Pani) and polypyrrole (Ppy) half hollow spheres with different shell thicknesses were successfully synthesized by three steps process using polystyrene (PS) as the core. The PS core was synthesized by emulsion polymerization. Aniline and pyrrole monomers were polymerized on the surface of the PS core. The shells of Pani and Ppy were fabricated by adding different amounts of aniline and pyrrole monomers. PS cores were dissolved and removed from the core shell structure by solvent extraction. The thicknesses of the Pani and Ppy half hollow spheres were observed by FE-SEM and FE-TEM. The chemical structures of the Pani and Ppy half hollow spheres were characterized by FT-IR spectroscopy and UV-Vis spectroscopy. The shell thicknesses of the Pani half hollow spheres were 30.2, 38.0, 42.2, 48.2, and 52.4 nm, while the shell thicknesses of the Ppy half hollow spheres were 16.0, 22.0, 27.0, and 34.0 nm. The shell thicknesses of Pani and Ppy half hollow spheres linearly increased as the amount of the monomer increased. Therefore, the shell thickness of the Pani and Ppy half hollow spheres can be controlled in these ranges.

Preparation of PS@SiO2, PS@TiO2，PS@TiO2/SiO2 Core-Shell Composites by a Spray Drying Process and Their Hollow Spheres after Removing PS Cores by Calcinations

2011 ◽  
Vol 194-196 ◽  
pp. 389-392
Author(s):  
Ling Li ◽  
Hong Liang Li ◽  
Ying Chun Zhu ◽  
Ai Ping Fu ◽  
Yong Wan ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Spray Drying ◽  
Hollow Spheres ◽  
Nitrogen Adsorption ◽  
Core Shell ◽  
Drying Process ◽  
The Core ◽  
Adsorption Desorption ◽  
Drying Chamber ◽  
Scanning Electron

Polystyrene (PS) spheres encapsulated core-shell composites of SiO2or TiO2nanoparticles were prepared by the spray drying technique and hollow spheres of SiO2or TiO2nanoparticles were then derived by removing the PS cores with calcinations. The PS spheres were dispersed into the SiO2or TiO2colloids, forming a suspension and then the suspensions were sprayed to form micrometer-sized droplets, as the droplets rush through the drying chamber, the PS spheres were encapsulated into the core of SiO2or TiO2particles due to the high temperatures and the instant evaporation, obtaining PS@SiO2, PS@TiO2or PS@SiO2/TiO2core-shell composites. After removing the PS core by calcination at 550°C, SiO2or TiO2hollow spheres were then derived. The influence of drying temperature, the concentration of the SiO2or TiO2particles and the ratio of PS sphere to the particles on the structures and specific surface area of the hollow spheres were studied with scanning electron microscopy (SEM) and nitrogen adsorption-desorption measurements.

Preparation of core–shell microstructures using an electroless plating method

2016 ◽  
Vol 89 ◽  
pp. 1278-1282 ◽  
Author(s):  
Chang-Hyun Song ◽  
Youngmin Kim ◽  
Byeong-Kwon Ju ◽  
Jong-Woong Kim
Keyword(s):  
Electroless Plating ◽  
Core Shell ◽  
Plating Method ◽  
Electroless Plating Method

scholarly journals Scalable synthesis of smooth PS@TiO2 core-shell and TiO2 hollow spheres in the (sub) micron size range: understanding synthesis and calcination parameters

2020 ◽  
Vol 298 (7) ◽  
pp. 867-878
Author(s):  
Anna M. Lechner ◽  
Tanja Feller ◽  
Qimeng Song ◽  
Bernd A. F. Kopera ◽  
Lukas Heindl ◽  
...  
Keyword(s):  
Size Range ◽  
Hollow Spheres ◽  
Core Shell ◽  
Micron Size ◽  
Scalable Synthesis ◽  
Tio2 Hollow Spheres

scholarly journals Photoacoustics of core–shell nanospheres using comprehensive modeling and analytical solution approach

2019 ◽  
Vol 2 (1) ◽  
Author(s):  
Khosro Shahbazi ◽  
Wolfgang Frey ◽  
Yun-Sheng Chen ◽  
Salavat Aglyamov ◽  
Stanislav Emelianov
Keyword(s):  
Analytical Solution ◽  
Thermal Resistance ◽  
Imaging Techniques ◽  
Silica Coating ◽  
Photoacoustic Signal ◽  
Interfacial Thermal Resistance ◽  
Core Shell ◽  
Contrast Imaging ◽  
Solution Approach ◽  
The Impact

Abstract Photoacoustic visualization of nanoparticles is capable of high contrast imaging at depth greater than that of traditional optical imaging techniques. Identifying the impact of various parameters on the photoacoustic signal is crucial in the design of effective medical imaging and diagnostics. Here, we develop a complete model of Fourier heat conduction incorporating the interfacial thermal resistance and photoacoustic equation for core-shell nanospheres in a fluid under nanosecond pulsed laser illumination. An analytical solution is obtained, elucidating the contribution of each region (core, shell, or the fluid) in the generation of the photoacoustic signal. The model reveals that the sharper the laser pulse temporal waveform is, the higher the sensitivity of the generated photoacoustic signal will be to the interfacial thermal resistance, and, thus, the higher the possibility of photoacoustic signal amplification will be using silica-coating. The comprehensive model and adopted analytical solution reveal the underlying physics of the photoacoustic signal generation  form core-shell nanosphere systems.

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