Results 21 to 30 of about 2,884 (216)

NANOTECNOLOGIA APLICADA AOS COSMÉTICOS

open access: yesVisão Acadêmica, 2012
A nanotecnologia está relacionada às estruturas, propriedades e processos envolvendo materiais com dimensões em escala nanométrica. Essas partículas são extensivamente investigadas por promoverem muitas vantagens em relação às formulações tradicionais.
M. B. BARIL   +3 more
openaire   +2 more sources

Barrier breakdown mechanism in nano-scale perpendicular magnetic tunnel junctions with ultrathin MgO barrier

open access: yesAIP Advances, 2018
Recently, the perpendicular magnetic tunnel junctions (p-MTJs) arouse great interest because of its unique features in the application of spin-transfer-torque magnetoresistive random access memory (STT-MRAM), such as low switching current density, good ...
Hua Lv   +8 more
doaj   +1 more source

Agricultura familiar, segurança e soberania alimentar e nanotecnologia: onde estamos, para onde vamos

open access: yesTomo, 2016
Em continuidade a reflexão realizada em 2007/2008 e publica- da em 2009 por Martins et al., “Impactos das Nanotecnologias na cadeia de produção da soja brasileira”, o presente artigo tem por objetivo introduzir a questão do desenvolvimento das na ...
Paulo Roberto Martins
doaj   +1 more source

Nanotecnología y salud animal: alianzas, políticas públicas y aprendizajes en torno al desarrollo de una estrategia para prevención y tratamiento para la brucelosis ovina

open access: yesRevista de la Facultad de Agronomía, 2020
A partir del uso del enfoque socio-técnico, este trabajo busca reconstruir el proceso de I+D para el tratamiento de la brucelosis ovina mediante nanotecnologías, a fin de contribuir al debate sobre el papel de las tecnologías emergentes en el desarrollo
Tomás Javier Carroza   +1 more
doaj   +1 more source

Microscopic Insights into Magnetic Warping and Time‐Reversal Symmetry Breaking in Topological Surface States of Rare‐Earth‐Doped Bi2Te3

open access: yesAdvanced Materials, EarlyView.
Magnetic doping of the topological insulator Bi2Te3 with erbium adatoms induces out‐of‐plane magnetism and breaks time‐reversal symmetry, opening a Dirac gap and driving a Fermi surface transition from hexagonal to star‐of‐David geometry. Microscopy, spectroscopy, and magnetic dichroism reveal atomically controlled magnetic interactions that tailor the
Beatriz Muñiz Cano   +18 more
wiley   +1 more source

Hydrogen-Sensing Properties of Ultrathin Pt-Co Alloy Films

open access: yesChemosensors, 2022
The present work aims to investigate the feasibility of utilizing Pt and PtCo alloy ultrathin films as hydrogen gas sensors in order to reduce the cost of the hydrogen gas sensors by using low-cost metallic materials. In this study, ultrathin Pt and PtCo
Mustafa Erkovan   +3 more
doaj   +1 more source

Nanotechnologies in regulatory overview: between the regulation of state specific absence and the harmonization need of the not state regulatory [PDF]

open access: yes, 2015
[PT] Este trabalho investiga o desenvolvimento das nanotecnologias, como um exemplo das chamadas "novas tecnologias", que prometem revolucionar a vida humana sobre a face da Terra.
Engelmann, Wilson, Pulz, Ronei L.
core  

3D Anodic Alumina Nanoarchitectures: A Decade of Progress from Foundational Science to Functional Metamaterials

open access: yesAdvanced Materials, EarlyView.
Ordered three‐dimensional anodic aluminum oxide (3D‐AAO) nanoarchitectures with longitudinal and transverse pores enable architecture‐driven metamaterials. The review maps fabrication advances, including hybrid pulse anodization, and shows how 3D‐AAO templates tailor properties across magnetism, energy, catalysis, and sensing.
Marisol Martín‐González
wiley   +1 more source

Nanotecnologia na agricultura: prospecção dos indicadores de impactos ambientais e sociais. [PDF]

open access: yes, 2013
Resumo: A Nanotecnologia está baseada na crescente capacidade da tecnologia moderna de manipular átomos e partículas em nanoescala, com aplicações em diversas áreas de atuação, desde a medicina, meio ambiente e agricultura.
ASSIS, O. B. G. de   +3 more
core  

A Colloidal Quantum Dot Thermistor and Bolometer

open access: yesAdvanced Materials, EarlyView.
This work introduces colloidal quantum dot thermistors employing a potential barrier structure to tune the activation energy of transport and hence the temperature coefficient of resistance (TCR). Upon integration with plasmonic absorbers, the CQD‐based bolometer device enables room‐temperature wavelength‐selective photodetection across the mid‐ to ...
Gaurav Kumar   +7 more
wiley   +1 more source

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