scholarly journals Preparation of core–shell-like zeolites by diffusion controlled chemical etching

2021 ◽  
Vol 8 (8) ◽  
pp. 2144-2152
Author(s):  
Yanfeng Shen ◽  
Mingrui Xu ◽  
jingyang Li ◽  
Zhengxing Qin ◽  
Chunzheng Wang ◽  
...  
Keyword(s):  
Chemical Etching ◽  
Core Shell ◽  
Diffusion Controlled ◽  
Mesoporous Shell

The present work reports on the preparation of core–shell-like zeolites with a Si-rich mesoporous shell.

scholarly journals In Situ Study of the Wet Chemical Etching of SiO2 and Nanoparticle@SiO2 Core–Shell Nanospheres

2021 ◽  
Author(s):  
Albert Grau-Carbonell ◽  
Sina Sadighikia ◽  
Tom A. J. Welling ◽  
Relinde J. A. van Dijk-Moes ◽  
Ramakrishna Kotni ◽  
...  
Keyword(s):  
Chemical Etching ◽  
Core Shell ◽  
In Situ Study ◽  
Wet Chemical ◽  
Wet Chemical Etching

Synthesis of hierarchical MFI zeolites with a micro–macroporous core@mesoporous shell structure

2019 ◽  
Vol 55 (6) ◽  
pp. 810-813
Author(s):  
Yunjuan Zhang ◽  
Xinbao Han ◽  
Shunai Che
Keyword(s):  
Shell Structure ◽  
Core Shell ◽  
Hydrophobic Tail ◽  
Mesoporous Shell ◽  
Mfi Zeolites

Core–shell structured ZSM-5 zeolites were synthesized by using a bifunctional surfactant containing alkene group in the hydrophobic tail.

Diffusion-controlled complex superconducting transition in (YBa2Cu3O7-δ)0.9/(La2/3Sr1/3MnO3)0.1 core-shell composites

2019 ◽  
Vol 786 ◽  
pp. 183-188
Author(s):  
Ramesh Chandra Bhatt ◽  
Shih-Jye Sun ◽  
Tzu-Hsuan Huang ◽  
An-Cheng Sun ◽  
Te-ho Wu ◽  
...  
Keyword(s):  
Core Shell ◽  
Superconducting Transition ◽  
Diffusion Controlled

scholarly journals Core-Shell Palladium/MOF Platforms as Diffusion-Controlled Nanoreactors in Living Cells and Tissue Models

2020 ◽  
Vol 1 (6) ◽  
pp. 100076 ◽  
Author(s):  
Raquel Martínez ◽  
Carolina Carrillo-Carrión ◽  
Paolo Destito ◽  
Aitor Alvarez ◽  
María Tomás-Gamasa ◽  
...  
Keyword(s):  
Living Cells ◽  
Core Shell ◽  
Diffusion Controlled ◽  
Tissue Models

The curing behaviour and thermo-mechanical properties of core–shell rubber-modified epoxy nanocomposites

2018 ◽  
Vol 27 (3) ◽  
pp. 168-175
Author(s):  
Dong Quan ◽  
Alojz Ivankovic
Keyword(s):  
Mechanical Properties ◽  
Abrupt Onset ◽  
Core Shell ◽  
Curing Process ◽  
Epoxy Nanocomposites ◽  
Scanning Calorimetry ◽  
Diffusion Controlled ◽  
Reactive Groups ◽  
Higher Temperature ◽  
Physical Changes

This work investigates the effects of core–shell rubber (CSR) nanoparticles on the curing behaviour and thermo-mechanical properties of an epoxy using differential scanning calorimetry and dynamic mechanical thermal analysis approaches. Interaction between CSR nanoparticles and epoxy matrix is detected at a temperature of approximately 97°C in the curing process. This results in an increase in the glass transition temperature ( Tg) of the cured nanocomposites. Given the semi-dynamic curing schedule, the curing process of all the epoxy nanocomposites consists of an abrupt onset stage followed by a slow diffusion-controlled stage. Higher temperature is required to initiate the curing for the epoxy nanocomposites with higher loading of CSR nanoparticles. This is attributed to the physical changes caused by the addition of CSR nanoparticles, such as the increase in the viscosity and the reduction in the density of the reactive groups. The storage modulus of the epoxy decreases in the glassy region but remains constant in the rubbery region due to the incorporation of CSR nanoparticles.

Core-Shell Pd/ZIF-8 Platforms as Diffusion-Controlled Nanoreactors in Living Cells and Tissue Models

2020 ◽  
Author(s):  
Raquel Martínez ◽  
Carolina Carrillo-Carrión ◽  
Paolo Destito ◽  
Aitor Alvarez ◽  
María Tomás-Gamasa ◽  
...  
Keyword(s):  
Living Cells ◽  
Core Shell ◽  
Diffusion Controlled ◽  
Tissue Models

Diffusion-controlled evolution of core–shell nanowire arrays into integrated hybrid nanotube arrays for Li-ion batteries

Nanoscale ◽  
2013 ◽  
Vol 5 (17) ◽  
pp. 8105 ◽  
Author(s):  
Jian Jiang ◽  
Jingshan Luo ◽  
Jianhui Zhu ◽  
Xintang Huang ◽  
Jinping Liu ◽  
...  
Keyword(s):  
Nanowire Arrays ◽  
Nanotube Arrays ◽  
Core Shell ◽  
Li Ion Batteries ◽  
Diffusion Controlled ◽  
Li Ion

Chemical Smoothing of Rough Metal Surfaces

1992 ◽  
Vol 114 (4) ◽  
pp. 421-426 ◽  
Author(s):  
D. E. Kim ◽  
N. P. Suh
Keyword(s):  
Chemical Etching ◽  
Material Removal ◽  
Metal Surfaces ◽  
Cost Effective ◽  
Simplified Model ◽  
Irregular Surface ◽  
Diffusion Controlled ◽  
Dissolved Species ◽  
Smoothing Process ◽  
Fundamental Mass

A chemical etching method is investigated as a possible approach to smoothing metal surfaces automatically. In a chemical etching process metal is removed due to chemical reaction and the dissolved species are transported away from the surface mainly by diffusion. Controlled dynamics introduced to the etchant motion provide the conditions necessary to perform preferential material removal such that an irregular surface is smoothed. A simplified model for the smoothing process based on fundamental mass transfer understandings is presented. Experimental results of smoothing electric discharge machined 440 stainless steel specimens are also presented. This work is motivated by the need to develop a cost effective way to manufacture molds during secondary processing.

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