Results 81 to 90 of about 208,599 (323)

A Bio‐Inspired Perspective on Materials Sustainability

open access: yesAdvanced Materials, EarlyView.
This perspective discusses natural materials as inspiration for sustainable engineering designs and the processing of materials. First, circularity, longevity, parsimony, and activity are presented as essential material paradigms. The perspective then uses many examples of natural and technical materials to introduce principles such as oligo ...
Wolfgang Wagermaier   +2 more
wiley   +1 more source

Enhanced Channel Mobility at Sub-nm EOT by Integration of a TmSiO Interfacial Layer in HfO2/TiN High-k/Metal Gate MOSFETs

open access: yesIEEE Journal of the Electron Devices Society, 2015
Integration of a high-k interfacial layer (IL) is considered the leading technological solution to extend the scalability of Hf-based high-k/metal gate CMOS technology.
Eugenio Dentoni Litta   +2 more
doaj   +1 more source

Extended silicate dust emission in PG QSOs [PDF]

open access: yes, 2008
This paper addresses the origin of the silicate emission observed in PG QSOs, based on observations with the Spitzer Space Telescope. Scenarios based on the unified model suggest that silicate emission in AGN arises mainly from the illuminated faces of the clouds in the torus at temperatures near sublimation. However, detections of silicate emission in
arxiv   +1 more source

Covalent Organic Frameworks for Photocatalysis

open access: yesAdvanced Materials, EarlyView.
This review provides an overview of recent advances in covalent organic frameworks (COFs) for photocatalysis, focusing on sustainable energy applications like water splitting, hydrogen peroxide generation, and CO2 and N2 reduction. It discusses design principles, structure‐function relationships, challenges in COF photocatalysis, and strategies to ...
Bikash Mishra   +6 more
wiley   +1 more source

On the Anomalous Silicate Emission Features of AGNs: A Possible Interpretation Based on Porous Dust [PDF]

open access: yes, 2008
The recent Spitzer detections of the 9.7 micron Si--O silicate emission in type 1 AGNs provide support for the AGN unification scheme. The properties of the silicate dust are of key importance to understanding the physical, chemical and evolutionary properties of the obscuring dusty torus around AGNs.
arxiv   +1 more source

Ultrafast Laser Synthesis of Zeolites

open access: yesAdvanced Materials, EarlyView.
The study presents a novel ultrafast laser‐driven synthesis technique for zeolites directly in liquid. Laser pulses create a microscopic reactor that controls reaction kinetics at femto‐ and picosecond timescales. Nonlinear light‐matter interactions drive nucleation and growth, allowing the process to be paused at any stage of self‐assembly.
Sezin Galioglu   +11 more
wiley   +1 more source

Silicon sources for rice crop

open access: yesScientia Agricola, 2004
Although silicon is not an essential nutrient, its application is beneficial for plant growth and development. To evaluate silicon sources in relation to agronomic efficiency and economic viability in rice crops (Oryza sativa L.), a greenhouse experiment
Hamilton Seron Pereira   +3 more
doaj  

Halide Perovskite Photocatalysts for Clean Fuel Production and Organic Synthesis: Opportunities and Challenges

open access: yesAdvanced Materials, EarlyView.
This review provides the state‐of‐the‐art overview of halide perovskite‐based photocatalysts for hydrogen production from water and halogen acid solutions, CO2 reduction into value‐added chemicals, and organic chemical transformations. Different types of halide perovskite photocatalysts and their relative efficiencies for hydrogen generation and CO2 ...
Siddharth Singh   +8 more
wiley   +1 more source

Fontes de silício no desenvolvimento de plântulas de bananeira 'Maçã' micropropagadas Sources of silicon in the development of micropropagated seedlings of banana 'Maçã'

open access: yesCiência Rural, 2011
O objetivo deste trabalho foi avaliar o efeito de diferentes fontes de silício durante a fase de enraizamento in vitro de bananeira 'Maçã' por meio de análise fisiológica, fitotécnica e ultraestrutural.
Simone Abreu Asmar   +5 more
doaj  

Sulfide-silicate textures in magmatic Ni-Cu-PGE sulfide ore deposits: Disseminated and net-textured ores

open access: yes, 2017
A large proportion of ores in magmatic sulfide deposits consist of mixtures of cumulus silicate minerals, sulfide liquid, and silicate melt, with characteristic textural relationships that provide essential clues to their origin.
Stephen J. Barnes   +8 more
semanticscholar   +1 more source

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