Results 41 to 50 of about 50,938 (292)

Re‐evaluation of silicon dioxide (E 551) as a food additive

EFSA Journal, 2018
The EFSA Panel on Food Additives and Nutrient Sources added to Food (ANS) provides a scientific opinion re‐evaluating the safety of silicon dioxide (E 551) when used as a food additive.
EFSA Panel on Food Additives and Nutrient Sources added to Food (ANS), Maged Younes, Peter Aggett, Fernando Aguilar, Riccardo Crebelli, Birgit Dusemund, Metka Filipič, Maria Jose Frutos, Pierre Galtier, David Gott, Ursula Gundert‐Remy, Gunter Georg Kuhnle, Jean‐Charles Leblanc, Inger Therese Lillegaard, Peter Moldeus, Alicja Mortensen, Agneta Oskarsson, Ivan Stankovic, Ine Waalkens‐Berendsen, Rudolf Antonius Woutersen, Matthew Wright, Polly Boon, Dimitrios Chrysafidis, Rainer Gürtler, Pasquale Mosesso, Dominique Parent‐Massin, Paul Tobback, Natalia Kovalkovicova, Ana Maria Rincon, Alexandra Tard, Claude Lambré   +30 more
doaj   +1 more source

Model of the Formation of a Fixed Charge in SiO₂, Produced by Thermal Oxidation of Silicon

Doklady Belorusskogo gosudarstvennogo universiteta informatiki i radioèlektroniki, 2023
Solid-state recrystallization of the surface silicon layer after chemical and mechanical polishing with application of fast thermal treatment by pulses of one second duration is one of the feasible methods of improving the silicon surface properties. The
U. A. Pilipenka, H. A. Amelchanka
doaj   +1 more source

Phase Change Material‐Driven Tunable Metasurface for Adaptive Terahertz Sensing and Communication in 6G Perceptive Networks

Advanced Functional Materials, EarlyView.
This study explores the benefits of metasurfaces made from functional materials, highlighting their ability to be adapted and improved for various high‐frequency applications, including communications and sensing. It first demonstrates the potential of these functional material‐based metasurfaces to advance the field of sub‐THz perceptive networks ...
Yat‐Sing To, Jiachen Du, Cyril Decroze, Laure Huitema, Aurelian Crunteanu, Hang Wong   +5 more
wiley   +1 more source

A New Approach of Obtaining Sodium Metasilicate from Dealuminated Kaolin for The Synthesis of Amorphous Silicon Dioxide Nanoparticles

East European Journal of Physics
Silicon Dioxide nanoparticles of high purity was synthesized using a novel technique of obtaining sodium metasilicate from de-aluminated metakaolin. The process involved taking the de-aluminated metakaolin through several recrystallization steps to form ...
D.B. Puzer, A.C.K. Amuzu, A. Abandoh, I. Nkrumah, B. Kwakye-Awuah, F.K. Ampong, R.K. Nkum, F. Boakye   +7 more
doaj   +1 more source

Growth and Etch Rate Study of Low Temperature Anodic Silicon Dioxide Thin Films

The Scientific World Journal, 2014
Silicon dioxide (SiO2) thin films are most commonly used insulating films in the fabrication of silicon-based integrated circuits (ICs) and microelectromechanical systems (MEMS).
Akarapu Ashok, Prem Pal
doaj   +1 more source

Rice husk ash and zeolite-siliceous rock as sources of amorphous silicon dioxide [PDF]

E3S Web of Conferences
The present article is referred to the study of amorphous analogs of silicon dioxide obtained from raw materials of plant and fossil origin available on the domestic market.
Gotlib Elena, Mishagin Kirill, Gabdulkhayev Kamil, Sokolova Alla   +3 more
doaj   +1 more source

Composite Nanoarchitectonics of Magnetic Silicon Dioxide-Modified Chitosan for Doxorubicin Delivery and In Vitro Cytotoxicity Assay [PDF]

, 2022
Mostafa Y. Nassar, Hamed I. El-Salhy, W. H. El-Shiwiny, Gamal Abdelaziz, R. El-Shiekh   +4 more
openalex   +1 more source

Ice Lithography: Recent Progress Opens a New Frontier of Opportunities

Advanced Functional Materials, EarlyView.
This review focuses on recent advancements in ice lithography, including breakthroughs in compatible precursors and substrates, processes and applications, hardware, and digital methods. Moreover, it offers a roadmap to uncover innovation opportunities for ice lithography in fields such as biological, nanoengineering and microsystems, biophysics and ...
Bingdong Chang, Gwendoline A. E. Anand, Rubaiyet Haque, Dylan A. Chiaro, Mona Sharma, Andrew R. Williams, Frank Niklaus, Daryl W. Yee, Gavin M. King, Anpan Han   +9 more
wiley   +1 more source

Photonic Engineering Enables All‐Passive Upconversion Imaging with Low‐Intensity Near‐Infrared Light

Advanced Functional Materials, EarlyView.
A passive upconversion imaging system enables the observation of scenes illuminated by low‐intensity incoherent near‐infrared light from 750 to 930 nm, by converting it into the visible without the use of external power. The upconverter is enabled by triplet–triplet annihilation in a bulk heterojunction, with absorption enhanced by plasmonic resonators
Rabeeya Hamid, Demeng Feng, Pournima Narayanan, Justin S. Edwards, Manchen Hu, Emma Belliveau, Minjeong Kim, Shenwei Yin, Sanket Deshpande, Chenghao Wan, Linda Pucurimay, David A. Czaplewski, Daniel N. Congreve, Mikhail A. Kats   +13 more
wiley   +1 more source

Tailoring the Properties of Functional Materials With N‐Oxides

Advanced Functional Materials, EarlyView.
The properties of materials bearing N‐oxide groups are often dominated by the polar N+─O− bond. It provides hydrophilicity, selective ion‐binding, electric conductivity, or antifouling properties. Many of the underlying mechanisms have only recently been discovered, and the interest in N‐oxide materials is rapidly growing.
Timo Friedrich, Michelle Kobus, Shirin Mesgarha, Erica Moretto, Laurens Grosche, Wolfgang Maison   +5 more
wiley   +1 more source