scholarly journals Polystyrene core–silica shell composite particles: effect of mesoporous shell structures on oxide CMP and mechanical stability

RSC Advances ◽  
2017 ◽  
Vol 7 (11) ◽  
pp. 6548-6558 ◽  
Author(s):  
Yang Chen ◽  
Ailian Chen ◽  
Jiawei Qin
Keyword(s):  
Chemical Mechanical Polishing ◽  
Mechanical Stability ◽  
Silica Shell ◽  
Shell Structures ◽  
Composite Particles ◽  
Core Shell ◽  
Potential Applications ◽  
Core Shell Structure ◽  
Shell Composite ◽  
Inorganic Composite

Organic/inorganic composite particles with a core–shell structure exhibit potential applications in chemical mechanical polishing/planarization (CMP) for mechanically challenging materials (copper and low-k dielectrics etc.).

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.

Characterization of Fe3O4@CS@NMDP magnetic nanoparticles with core–shell structure prepared by chemical cross-linking method

2017 ◽  
Vol 10 (05) ◽  
pp. 1750056 ◽  
Author(s):  
Huiping Shao ◽  
Jiangcong Qi ◽  
Tao Lin ◽  
Yuling Zhou ◽  
Fucheng Yu
Keyword(s):  
Magnetic Nanoparticles ◽  
Shell Structure ◽  
High Performance ◽  
Cross Linking ◽  
Composite Particles ◽  
Core Shell ◽  
The Core ◽  
Targeting Delivery ◽  
Core Shell Structure ◽  
Chemical Cross Linking

The core–shell structure composite magnetic nanoparticles (NPs), Fe3O4@chitosan@nimodipine (Fe3O4@CS@NMDP), were successfully synthesized by a chemical cross-linking method in this paper. NMDP is widely used for cardiovascular and cerebrovascular disease prevention and treatment, while CS is of biocompatibility. The composite particles were characterized by an X-ray diffractometer (XRD), a Fourier transform infrared spectroscopy (FT-IR), a transmission electron microscopy (TEM), a vibrating sample magnetometers (VSM) and a high performance liquid chromatography (HPLC). The results show that the size of the core–shell structure composite particles is ranging from 12[Formula: see text]nm to 20[Formula: see text]nm and the coating thickness of NMDP is about 2[Formula: see text]nm. The saturation magnetization of core–shell composite NPs is 46.7[Formula: see text]emu/g, which indicates a good potential application for treating cancer by magnetic target delivery. The release percentage of the NMDP can reach 57.6% in a short time of 20[Formula: see text]min in the PBS, and to 100% in a time of 60[Formula: see text]min, which indicates the availability of Fe3O4@CS@NMDP composite NPs for targeting delivery treatment.

Physico‐mechanical properties and flammability of PUR/PIR foams containing expandable graphite core‐shell composite particles

2019 ◽  
Vol 40 (10) ◽  
pp. 3805-3813 ◽  
Author(s):  
Kamila Gosz ◽  
Józef Haponiuk ◽  
Aleksandra Mielewczyk‐Gryń ◽  
Łukasz Piszczyk
Keyword(s):  
Mechanical Properties ◽  
Composite Particles ◽  
Expandable Graphite ◽  
Core Shell ◽  
Shell Composite

scholarly journals Molecular dynamics study on the formation of self-organized core/shell structures in the Pb alloy at the nanoscale

RSC Advances ◽  
2017 ◽  
Vol 7 (84) ◽  
pp. 53509-53515 ◽  
Author(s):  
Tao Li ◽  
ZhiChao Wang ◽  
YunRui Duan ◽  
Jie Li ◽  
Hui Li
Keyword(s):  
Molecular Dynamics ◽  
Shell Structure ◽  
Shell Structures ◽  
Core Shell ◽  
Self Organized ◽  
Core Shell Structure

An abnormal self-organized core/shell structure is formed in the liquid Al–Pb alloy, which can be controlled by confined conditions.

Controlled detonation synthesis of nano Fe-based oxides/SiO2 core-shell composite particles

2020 ◽  
Vol 740 ◽  
pp. 137016
Author(s):  
Xiaohong Wang ◽  
Liang Guo ◽  
Xiaojie Li ◽  
Xueqi Li ◽  
Lingjie Kong ◽  
...  
Keyword(s):  
Composite Particles ◽  
Core Shell ◽  
Detonation Synthesis ◽  
Shell Composite

THERMODYNAMIC AND KINETIC ANALYSES OF SYNTHESIZING ZrB2@Al(OH)3–Y(OH)3 CORE–SHELL COMPOSITE PARTICLES

2007 ◽  
Vol 14 (01) ◽  
pp. 117-122 ◽  
Author(s):  
JIEGUANG SONG ◽  
LIANMENG ZHANG ◽  
JUNGUO LI ◽  
JIANRONG SONG
Keyword(s):  
High Temperature ◽  
High Performance ◽  
Solubility Product ◽  
Ceramic Materials ◽  
Precipitation Method ◽  
Composite Particles ◽  
Core Shell ◽  
High Temperature Strength ◽  
Co Precipitation ◽  
Shell Composite

ZrB 2 has some excellent performances, but it is easily oxidized at high temperatures to impact the high-temperature strength, which restricts its applied range. To protect from the oxidization and improve the strength of ZrB 2 at high temperature, the surface of ZrB 2 particles is coated with the Al ( OH )3– Y ( OH )3 shell to synthesize ZrB 2@ Al ( OH )3– Y ( OH )3 core–shell composite particles. Through the thermodynamic and kinetic analyses of the heterogeneous nucleation and homogeneous nucleation, the concentration product of precursor ion ( Y 3+ or Al 3+) and OH - (Qi) must be greater than the solubility product (K sp ), respectively; the conditions of Y 3+ and Al 3+ are reached to produce Al ( OH )3– Y ( OH )3 shell on the ZrB 2 surface between the Y 3+ line and the AlO 2- line. Through TEM and XRD analyses, ZrB 2@ Al ( OH )3– Y ( OH )3 core–shell composite particles are successfully synthesized by the co-precipitation method, the shell layer quality is better at pH = 9, which established the foundation for preparing high-performance YAG / ZrB 2 and Al 2 O 3– YAG / ZrB 2 multiphase ceramic materials.

Effect of core–shell composite particles on the sintering behavior and properties of nano-Al2O3/polystyrene composite prepared by SLS

2006 ◽  
Vol 60 (9-10) ◽  
pp. 1219-1223 ◽  
Author(s):  
Haizhong Zheng ◽  
Jian Zhang ◽  
Shiqiang Lu ◽  
Gaochao Wang ◽  
Zhifeng Xu
Keyword(s):  
Composite Particles ◽  
Sintering Behavior ◽  
Core Shell ◽  
Shell Composite
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