Results 51 to 60 of about 11,642 (265)

Electrostatic Superlattices Beyond 1:1 Stoichiometry

Advanced Functional Materials, EarlyView.
Polymer‐mediated charge regulation drives two hierarchical routes to higher‐stoichiometry nanoparticle superlattices. Tuning the polymer's molecular weight promotes progressive interstitial filling, transforming ZnS into the fully occupied CaF2${\rm CaF}_2$ lattice. Exchanging polymer assignment between large and small nanoparticles instead breaks CsCl
Binay P. Nayak, Prapti Kakkar, Wesley P. Korba, Honghu Zhang, Wenjie Wang, Surya K. Mallapragada, Alex Travesset, David Vaknin   +7 more
wiley   +1 more source

Variation of the Chemical Composition of Waste Cooking Oils upon Bentonite Filtration

Resources, 2019
The chemical composition and the color of samples of waste cooking oils (WCOs) were determined prior to and after filtration on two different pads of bentonite differing in particle size.
Alberto Mannu, Gina Vlahopoulou, Paolo Urgeghe, Monica Ferro, Alessandra Del Caro, Alessandro Taras, Sebastiano Garroni, Jonathan P. Rourke, Roberto Cabizza, Giacomo L. Petretto   +9 more
doaj   +1 more source

Sulfur‐Free Ultrahigh‐Refractive‐Index Polymers Enabled by Densely Packed Oxygen‐Bridged Dibenzofuran‐Cardo Architectures

Advanced Functional Materials, EarlyView.
A new class of sulfur‐free, oxygen‐bridged dibenzofuran‐based polymers is developed for ultrahigh‐refractive‐index applications. The rigid π‐extended architecture and enhanced molecular polarizability enable exceptional optical performance, combining refractive indices up to 1.848 with high Abbe numbers and full visible transparency. This work offers a
Hend A. Hegazy, Gyeongsoo Kim, Sooyoung Lee, Mohamed R. Elmasry, Youn‐Chul Kim, Changsik Song   +5 more
wiley   +1 more source

Make‐Use‐Remake: Toward Indefinite Low‐Temperature Material Loops

Advanced Functional Materials, EarlyView.
We introduce a regenerable materials platform built from microparticles bound by a temperature‐responsive polymer shell, enabling strong, processable structures from diverse feedstocks. The material is shaped at low temperatures (80°C) using common manufacturing methods and reprocessed repeatedly in the presence of water, demonstrating stable ...
Nikola Křivánková, Wouter van der Wijngaart, Ulrica Edlund   +2 more
wiley   +1 more source

Termogravimetria: um novo enfoque para a clássica determinação de cálcio em cascas de ovos Termogravimetry: a new approach for the classic determination of calcium in eggshells

Química Nova, 2009
The use of thermoanalytical data in sample preparation is described as a tool to catch the students' attention to some details that can simplify both the analysis and the analytical procedure.
Júnia G. Pereira, Fabiano Okumura, Luiz A. Ramos, Éder T. G. Cavalheiro, Joaquim A. Nóbrega   +4 more
doaj   +1 more source

Ferroelectric Quantum Dots for Retinomorphic In‐Sensor Computing

Advanced Materials, EarlyView.
This work has provided a protocol for fabricating retinomorphic phototransistors by integrating ferroelectric ligands with quantum dots. The resulting device combines ferroelectricity, optical responsiveness, and low‐power operation to enable adaptive signal amplification and high recognition accuracy under low‐light conditions, while supporting ...
Tingyu Long, Huanyu Zhou, Jaewan Ko, Hongwei Tan, Jaemin Lim, Yanfei Zhao, Daehan Kang, Eojin Yoon, Gyeong‐Tak Go, Somin Kim, Seung‐Woo Lee, Chan‐Yul Park, Hyojun Choi, Hyeran Kim, Hyung Joong Yun, Sung Hyuk Park, Kwan Sik Park, Jeong Woo Park, Mungeun Kim, Yong Soo Cho, Ho Won Jang, Wenqiang Yang, Min Hyuk Park, Wan Ki Bae, Sebastiaan van Dijken, Joona Bang, Tae‐Woo Lee   +26 more
wiley   +1 more source

Depolymerization of PMMA-Based Dental Resin Scraps on Different Production Scales

Energies
This research explores the depolymerization of waste polymethyl methacrylate (PMMAW) from dental material in fixed bed semi-batch reactors, focusing on three production scales: laboratory, technical and pilot.
Haroldo Jorge da Silva Ribeiro, Armando Costa Ferreira, Caio Campos Ferreira, Lia Martins Pereira, Marcelo Costa Santos, Lauro Henrique Hamoy Guerreiro, Fernanda Paula da Costa Assunção, Sílvio Alex Pereira da Mota, Douglas Alberto Rocha de Castro, Sergio Duvoisin, Luiz Eduardo Pizarro Borges, Nélio Teixeira Machado, Lucas Pinto Bernar   +12 more
doaj   +1 more source

Um Estudo Qualitativo por Espectroscopia de Fluorescência e por Termogravimetria de uma Resina de Nanopartículas: Uma Avaliação do Efeito de Diferentes Fontes de Luz

Orbital: The Electronic Journal of Chemistry, 2016
The objective of this study was to qualitatively analyze the polymerization of a nanoparticle resin; the method used combined a fluorescence spectroscopy technique with the use of Rhodamine dye. For comparative purposes, differential scanning calorimetry
Aline B. Denis, Mauricio B. Amaral, Cristina A. Diagone, Ana M. G. Plepis, Rommel B. Viana   +4 more
doaj   +1 more source

General treatment of the thermogravimetry of polymers

Journal of Research of the National Bureau of Standards Section A: Physics and Chemistry, 1966
Theoretical equations are developed for typical decompositions of polymers including those in which the volatilization does not follow a simple "reaction order" and those made up of a composite of several reactions of differing energies of activation. The effects of order, activation energy, heating rate and temperature dependence upon the calculated ...
Joseph H, Flynn, Leo A, Wall
openaire   +2 more sources

Spiro‐Phenothiazine Hole‐Transporting Materials: Unlocking Stability and Scalability in Perovskite Solar Cells

Advanced Materials, EarlyView.
Fluorene‐functionalized spiro‐phenothiazine (PTZ‐Fl) exhibits strong Li+ affinity and thermal stability, enabling a PCE of 25.75% in small‐area cells and 22.07% in 25 cm2 modules. Under ISOS‐L3 conditions, PTZ‐Flbased devices retain over 80% efficiency after 1000 hours, demonstrating superior stability and scalability compared to spiro‐OMeTAD for next ...
Javier Urieta‐Mora, Seung Ju Choi, Jaeki Jeong, Silvia Orecchio, Inés García‐Benito, Manuel Pérez‐Escribano, Joaquín Calbo, Likai Zheng, Minseop Byun, Seyeong Song, Gi‐Hwan Kim, Shaik M. Zakeeruddin, Seog‐Young Yoon, Yimhyun Jo, Agustín Molina‐Ontoria, Enrique Ortí, Nazario Martín, Michael Grätzel   +17 more
wiley   +1 more source