Orientation and morphology of Pt nanoparticles in γ-alumina processed via ion implantation and thermal annealing
Orientation and morphology of Pt nanoparticles in γ-alumina processed via ion implantation and thermal annealing
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DOI：
10.1016/j.scriptamat.2020.06.058
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发表时间：
2020-11-01
影响因子：
6
通讯作者：
Santala, Melissa K.
中科院分区：
文献类型：
--
作者：
Clauser, Arielle L.;Giulian, Raquel;Santala, Melissa K.
金属/金属氧化物界面的结构和化学对于许多催化过程和传感至关重要。使用高能离子注入和热处理的Pt和γ-Al 2 O3的原始接口制造。在Pt+注入过程中，氧化铝的非晶区域在单晶α-氧化铝中形成，800 ℃的热处理使非晶氧化铝结晶为γ-Al 2 O3，并允许Pt离子在形成的γ-氧化铝内沉淀，产生由{111}表面终止的Pt纳米颗粒四面体。氧化铝的相，开发和Pt纳米粒子的分布，形态和取向，确定使用X-射线衍射，卢瑟福背散射光谱，透射电子显微镜和扫描透射电子显微镜。(C)2020 Acta Materialia Inc.由爱思唯尔有限公司出版。保留所有权利。
Structure and chemistry of metal/metal-oxide interfaces are critical for many catalytic processes and sensing. Pristine interfaces of Pt and gamma-Al2O3 were fabricated using high-energy ion implantation and thermal processing. Amorphous regions of alumina develop in single crystal alpha-alumina during Pt+ implantation and an 800 degrees C thermal treatment crystalizes amorphized alumina to gamma-Al2O3 and allows Pt ions to precipitate within the developing gamma-alumina, yielding Pt nanoparticle tetrahedra terminated by {111} surfaces. The phase of alumina that developed and the distribution, morphology, and orientation of Pt nanoparticles was determined using x-ray diffraction, Rutherford backscattering spectrometry, transmission electron microscopy and scanning transmission electron microscopy. (C) 2020 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.