Gas Phase Synthesis of Multifunctional Fe-Based Nanocubes

TY - JOUR

T1 - Gas Phase Synthesis of Multifunctional Fe-Based Nanocubes

AU - Vernieres, Jerome

AU - Steinhauer, Stephan

AU - Zhao, Junlei

AU - Chapelle, Audrey

AU - Menini, Philippe

AU - Dufour, Nicolas

AU - Diaz, Rosa E.

AU - Nordlund, Kai

AU - Djurabekova, Flyura

AU - Grammatikopoulos, Panagiotis

AU - Sowwan, Mukhles

N1 - Publisher Copyright: © 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

PY - 2017/3/17

Y1 - 2017/3/17

N2 - Magnetron-sputtering inert-gas condensation is an emerging technique offering single-step, chemical-free synthesis of nanoparticles with well-defined morphologies optimized for specific applications. In this study, the authors report a flexible approach to produce Fe nanocubes as building blocks for high-performance NO2 gas sensor devices, and hybrid FeAu nanocubes with magneto-plasmonic properties. Considering that nucleation happens within a short distance from the sputtering target, the authors utilize the high-permeability and resultant screening effect induced by magnetic Fe targets of various thicknesses to manipulate the magnetic field configuration and plasma confinement. The authors thus readily switch from bimodal to single-Gaussian size distributions of Fe nanocubes by modifying their primordial thermal environments, as explained by a combination of modeling methods. Simultaneously, the authors obtain a material yield increase of more than one order of magnitude compared to experiments using postgrowth mass filtration. The effectiveness of the method is demonstrated by the deposition of Fe nanocubes on microhotplate devices, leading to unprecedented NO2 detection performance for Fe-based chemoresistive gas sensors. The exceedingly low detection limit down to 3 ppb is attributed to a morphological change in operando from Fe/Fe-oxide core/shell to specific hollow-nanocube structures, as revealed by in situ environmental transmission electron microscopy.

AB - Magnetron-sputtering inert-gas condensation is an emerging technique offering single-step, chemical-free synthesis of nanoparticles with well-defined morphologies optimized for specific applications. In this study, the authors report a flexible approach to produce Fe nanocubes as building blocks for high-performance NO2 gas sensor devices, and hybrid FeAu nanocubes with magneto-plasmonic properties. Considering that nucleation happens within a short distance from the sputtering target, the authors utilize the high-permeability and resultant screening effect induced by magnetic Fe targets of various thicknesses to manipulate the magnetic field configuration and plasma confinement. The authors thus readily switch from bimodal to single-Gaussian size distributions of Fe nanocubes by modifying their primordial thermal environments, as explained by a combination of modeling methods. Simultaneously, the authors obtain a material yield increase of more than one order of magnitude compared to experiments using postgrowth mass filtration. The effectiveness of the method is demonstrated by the deposition of Fe nanocubes on microhotplate devices, leading to unprecedented NO2 detection performance for Fe-based chemoresistive gas sensors. The exceedingly low detection limit down to 3 ppb is attributed to a morphological change in operando from Fe/Fe-oxide core/shell to specific hollow-nanocube structures, as revealed by in situ environmental transmission electron microscopy.

KW - Fe nanocubes

KW - gas sensors

KW - magneto-plasmonic

KW - magnetron sputtering

KW - molecular dynamics

UR - http://www.scopus.com/inward/record.url?scp=85015260301&partnerID=8YFLogxK

U2 - 10.1002/adfm.201605328

DO - 10.1002/adfm.201605328

M3 - 文章

AN - SCOPUS:85015260301

SN - 1616-301X

VL - 27

JO - Advanced Functional Materials

JF - Advanced Functional Materials

IS - 11

M1 - 1605328

ER -