期刊
JOURNAL OF PHYSICAL CHEMISTRY C
卷 123, 期 43, 页码 26481-26489出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpcc.9b09340
关键词
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资金
- EPSRC [EP/D077664/1]
- French National Research Agency (ANR), through the NobleFreeCat project [ANR-17-CE07-0022]
- BQRI program from Universite de Lille
- Chevreul Institute [FR 2638]
- Ministere de l'Enseignement Superieur et de la Recherche
- Region Hauts-de-France
- FEDER
- EPSRC [EP/D077664/1] Funding Source: UKRI
- Agence Nationale de la Recherche (ANR) [ANR-17-CE07-0022] Funding Source: Agence Nationale de la Recherche (ANR)
The inert gas condensation method (IGC) produces multimetallic nanoparticles in a metastable state that may exhibit heterogeneities of size, structure, and composition. The deposition of IGC-fabricated nanoparticles on substrates allows for a detailed characterization by combination of aberration-corrected scanning transmission electron microscopy (TEM) and atom probe tomography (APT). Multiple particle monitoring and high-resolution scanning TEM give access to the size distribution of Au-Cu nanoparticles (<10 nm in diameter, bimodal distribution). TEM and APT show that the alloying between Cu and Au may stabilize the I-h structure for smaller particles (<4 nm). Combining high-resolution scanning transmission electron microscopy/energy dispersive X-ray and three-dimensional composition analysis by APT reveals that an excess of Cu may be present in a shell around the larger particles (>7 nm), while Cu is more randomly distributed in smaller particles.
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