silica films
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2022 ◽  
Author(s):  
Samantha Soulé ◽  
Gilles E. Moehl ◽  
Ruomeng Huang ◽  
Yasir Jamal Noori ◽  
Kian Shen Kiang ◽  
...  

The combination of lithographic methods and sol gel bottom-up is a promising approach for nanopatterning substrates. The integration and scalable fabrication of such substrates are of great interest for the...


2022 ◽  
Author(s):  
Plinio Innocenzi
Keyword(s):  

ChemPhysChem ◽  
2021 ◽  
Author(s):  
Samuel Ahoulou ◽  
Neus Vilà ◽  
Sébastien Pillet ◽  
Cédric Carteret ◽  
Dominik Schaniel ◽  
...  

2021 ◽  
Vol 127 (9) ◽  
Author(s):  
Adi Darmawan ◽  
Dwi Lestari Handayani ◽  
Riza Eka Saputra

2021 ◽  
Vol 22 (14) ◽  
pp. 7505
Author(s):  
Andrii Fedorchuk ◽  
Alain Walcarius ◽  
Magdalena Laskowska ◽  
Neus Vila ◽  
Paweł Kowalczyk ◽  
...  

In this work, we have developed a chemical procedure enabling the preparation of highly ordered and vertically aligned mesoporous silica films containing selected contents of silver ions bonded inside the mesopore channels via anchoring propyl-carboxyl units. The procedure involves the electrochemically assisted self-assembly co-condensation of tetraethoxysilane and (3-cyanopropyl)triethoxysilane in the presence of cetyltrimethylammonium bromide as a surfactant, the subsequent hydrolysis of cyano groups into carboxylate ones, followed by their complexation with silver ions. The output materials have been electrochemically characterized with regard to the synthesis effectiveness in order to confirm and quantify the presence of the silver ions in the material. The mesostructure has been observed by transmission electron microscopy. We have pointed out that it is possible to finely tune the functionalization level by controlling the co-condensation procedure, notably the concentration of (3-cyanopropyl)triethoxysilane in the synthesis medium.


Heliyon ◽  
2021 ◽  
pp. e07675
Author(s):  
Martin Timusk ◽  
Triin Kangur ◽  
Meeri Visnapuu ◽  
Siim Pikker ◽  
Andris Šutka ◽  
...  
Keyword(s):  
Sol Gel ◽  

Materials ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3371
Author(s):  
Bangyun Xiong ◽  
Jingjing Li ◽  
Chunqing He ◽  
Jiale Lai ◽  
Xiangjia Liu ◽  
...  

Tunable mesoporous silica films were prepared though a sol-gel process directed by the self-assembly of various triblock copolymers. Positron annihilation γ-ray energy spectroscopy and positron annihilation lifetime spectroscopy (PALS) based on intense pulsed slow positron beams as well as ellipsometric porosimetry (EP) combined with heptane adsorption were utilized to characterize the open porosity/interconnectivity and pore size distribution for the prepared films. The consistency between the open porosities was examined by the variations of orthopositronium (o-Ps) 3γ annihilation fractions and the total adsorbed volumes of heptane. The average pore sizes deduced by PALS from the longest-lived o-Ps lifetimes are in good agreement with those by EP on the basis of the Barrett–Joyner–Halenda model, as indicated by a well fitted line of slope k = 1. The results indicate that the EP combined with heptane adsorption is a useful method with high sensitivity for calibrating the mesopore size in highly interconnected mesoporous films, whereas PALS is a novel, complementary tool for characterizing both closed and open pores in them.


2021 ◽  
Vol 2 (2) ◽  
pp. 2021-03152-2021-03152
Author(s):  
Alain Walcarius

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