scholarly journals Uniform core–shell PPy@carbon microsphere composites with a tunable shell thickness: the synthesis and their excellent microwave absorption performances in the X-band

RSC Advances ◽  
2017 ◽  
Vol 7 (84) ◽  
pp. 53104-53110 ◽  
Author(s):  
Jian Liu ◽  
Zhongzhu Wang ◽  
Sajid ur Rehman ◽  
Hong Bi
Keyword(s):  
Microwave Absorption ◽  
Shell Thickness ◽  
Core Shell ◽  
Carbon Microspheres ◽  
Carbon Microsphere ◽  
The Core ◽  
X Band ◽  
Highly Uniform

Highly uniform core–shell polypyrrole@carbon microspheres (PPy@CM) have been successfully constructed by oxidation polymerization of pyrrole as the shell on the core of carbon microspheres.

Investigation of microwave absorption property of the core–shell structured Li0.4Mg0.6Fe2O4/TiO2 nanocomposite in X-band region

2014 ◽  
Vol 590 ◽  
pp. 331-340 ◽  
Author(s):  
Pallab Bhattacharya ◽  
Goutam Hatui ◽  
Avinandan Mandal ◽  
Chapal Kumar Das ◽  
Rudresh Kumar ◽  
...  
Keyword(s):  
Microwave Absorption ◽  
Microwave Absorption Property ◽  
Core Shell ◽  
Absorption Property ◽  
The Core ◽  
Band Region ◽  
X Band

Optical Temperature Sensing of Core-Shell Structured NaYF4:Yb3+, Er3+@NaYF4 Nanocrystals with Different Shell Thickness

2015 ◽  
Vol 738-739 ◽  
pp. 27-30
Author(s):  
Dong Dong Li ◽  
Qi Yue Shao ◽  
Yan Dong ◽  
Jian Qing Jiang
Keyword(s):  
Shell Thickness ◽  
Thermal Sensitivity ◽  
Upconversion Luminescence ◽  
Temperature Sensing ◽  
Upconversion Nanoparticles ◽  
Core Shell ◽  
Sensing Properties ◽  
The Core ◽  
Β Phase ◽  
Biomedical Fields

Hexagonal (β)-phase NaYF4:Yb3+, Er3+ upconversion nanoparticles (UCNPs) with and without an inert (undoped NaYF4) shell have been successfully synthesized and the effects of shell thickness on the upconversion luminescence (UCL) and temperature sensing properties were systematically investigated. It was found that the NaYF4 shell and its thickness do not affect the RHS values and thermal sensitivity, but can obviously improve the UCL intensity of NaYF4:Yb3+, Er3+ UCNPs. It implies that the core-shell structured NaYF4:Yb3+, Er3+@NaYF4 UCNPs with excellent UCL properties have great potential to be used as temperature sensing probes in biomedical fields, without considering the influences of the shell thickness on their temperature sensing properties.

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.

Microwave absorption properties of the core/shell-type iron and nickel nanoparticles

2008 ◽  
Vol 320 (6) ◽  
pp. 1106-1111 ◽  
Author(s):  
B. Lu ◽  
X.L. Dong ◽  
H. Huang ◽  
X.F. Zhang ◽  
X.G. Zhu ◽  
...  
Keyword(s):  
Microwave Absorption ◽  
Nickel Nanoparticles ◽  
Core Shell ◽  
Absorption Properties ◽  
Microwave Absorption Properties ◽  
The Core ◽  
Shell Type

Core@shell nanostructured Au-d@NimPtm for electrochemical oxygen reduction reaction: effect of the core size and shell thickness

2019 ◽  
Vol 9 (17) ◽  
pp. 4668-4677 ◽  
Author(s):  
Min Zhang ◽  
Shu Miao ◽  
Bo-Qing Xu
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Shell Thickness ◽  
Reduction Reaction ◽  
Core Shell ◽  
Core Size ◽  
The Core ◽  
Electrocatalytic Performance ◽  
Electrochemical Oxygen

Au-d@NimPtm nanostructures are studied to address the effects of the Au-core size (d) and NiPt-shell thickness (m) on the electrocatalytic performance of Pt for the ORR.

Effect of the core-shell impact modifier shell thickness on toughening PVC

2004 ◽  
Vol 44 (10) ◽  
pp. 1885-1889 ◽  
Author(s):  
Juh-Shyong Lee ◽  
Feng-Chih Chang
Keyword(s):  
Shell Thickness ◽  
Core Shell ◽  
The Core ◽  
Impact Modifier

Constructing Uniform Core–Shell PPy@PANI Composites with Tunable Shell Thickness toward Enhancement in Microwave Absorption

2015 ◽  
Vol 7 (36) ◽  
pp. 20090-20099 ◽  
Author(s):  
Chunhua Tian ◽  
Yunchen Du ◽  
Ping Xu ◽  
Rong Qiang ◽  
Ying Wang ◽  
...  
Keyword(s):  
Microwave Absorption ◽  
Shell Thickness ◽  
Core Shell

scholarly journals Stress Distribution in Microregion of Core–Shell Structure Lightweight Aggregate Concrete

Buildings ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 540
Author(s):  
Meng Zhu ◽  
Lihua Zhang ◽  
Weilong Wang ◽  
Hongping Zhang ◽  
Wenjin Xing
Keyword(s):  
Stress Distribution ◽  
Shell Structure ◽  
Shell Thickness ◽  
Lightweight Aggregate ◽  
Thickness Ratio ◽  
Core Shell ◽  
Distribution Analysis ◽  
Failure Resistance ◽  
The Core ◽  
Core Shell Structure

An in-depth understanding of the effect of cordierite/belite core–shell structure lightweight aggregate (CSLWA) on the mechanical performance of LWA concrete (LWAC) is critical for improving the failure resistance of LWAC. In this study, the stress distribution of the microregion in CSLWA was systematically investigated via a finite element analysis to explore its effect on the mechanical properties of LWAC. In detail, the material components, core–shell thickness ratio, porosity and width of interfacial transition zone (ITZ), and absence or presence of interfacial bonding zone (IBZ) were considered during the stress distribution analysis of the microregion of LWAC. The results showed that a reduction in the material components, with a high-elastic modulus in the core, a decrease in the core–shell thickness ratio, and the formation of the core–shell IBZ are beneficial for optimizing the stress distribution of the microregion and alleviating the stress concentration phenomenon of LWAC. Moreover, due to the continuous hydration of belite shell, the ITZ of CSLWA becomes increasingly dense, thus the stress distribution is more uniform than that of ordinary LWAC, indicating that CSLWA exhibits the potential to improve the failure resistance of LWAC. This study helps to develop an understanding of the role played by the core–shell structure in improving the toughness of LWAC, and provides a new solution and methodology for improving the brittleness of LWAC.

Microwave absorption enhancement of Fe3O4/polyaniline core/shell hybrid microspheres with controlled shell thickness

2013 ◽  
Vol 130 (3) ◽  
pp. 1909-1916 ◽  
Author(s):  
Bin Zhang ◽  
Yunchen Du ◽  
Peng Zhang ◽  
Hongtao Zhao ◽  
Leilei Kang ◽  
...  
Keyword(s):  
Microwave Absorption ◽  
Shell Thickness ◽  
Absorption Enhancement ◽  
Core Shell
Sign in / Sign up

Export Citation Format

Share Document