Self-Organized Platinum Nanoparticles on Freestanding Graphene

Self-Organized Platinum Nanoparticles on Freestanding Graphene

Freestanding graphene membranes were successfully functionalized with platinum nanoparticles (Pt NPs). High-resolution transmission electron microscopy revealed a homogeneous distribution of single-crystal Pt NPs that tend to exhibit a preferred orientation. Unexpectedly, the NPs were also found to...

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Veröffentlicht in:ACS nano 2014-03, Vol.8 (3), p.2697-2703
Hauptverfasser: Xu, Peng, Dong, Lifeng, Neek-Amal, Mehdi, Ackerman, Matthew L, Yu, Jianhua, Barber, Steven D, Schoelz, James Kevin, Qi, Dejun, Xu, Fangfang, Thibado, Paul M, Peeters, Francois M
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container_issue 3
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container_title ACS nano
container_volume 8
creator Xu, Peng
Dong, Lifeng
Neek-Amal, Mehdi
Ackerman, Matthew L
Yu, Jianhua
Barber, Steven D
Schoelz, James Kevin
Qi, Dejun
Xu, Fangfang
Thibado, Paul M
Peeters, Francois M
description Freestanding graphene membranes were successfully functionalized with platinum nanoparticles (Pt NPs). High-resolution transmission electron microscopy revealed a homogeneous distribution of single-crystal Pt NPs that tend to exhibit a preferred orientation. Unexpectedly, the NPs were also found to be partially exposed to the vacuum with the top Pt surface raised above the graphene substrate, as deduced from atomic-scale scanning tunneling microscopy images and detailed molecular dynamics simulations. Local strain accumulation during the growth process is thought to be the origin of the NP self-organization. These findings are expected to shape future approaches in developing Pt NP catalysts for fuel cells as well as NP-functionalized graphene-based high-performance electronics.
doi_str_mv 10.1021/nn406394f
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title Self-Organized Platinum Nanoparticles on Freestanding Graphene
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