Fabrication of crystals from single metal atoms.
Fabrication of crystals from single metal atoms.
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DOI：
10.1038/ncomms4851
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发表时间：
2014-05-27
影响因子：
16.6
通讯作者：
Sadler, Peter J.
中科院分区：
文献类型：
--
作者：
Barry, Nicolas P. E.;Pitto-Barry, Anais;Sanchez, Ana M.;Dove, Andrew P.;Procter, Richard J.;Soldevila-Barreda, Joan J.;Kirby, Nigel;Hands-Portman, Ian;Smith, Corinne J.;O'Reilly, Rachel K.;Beanland, Richard;Sadler, Peter J.
金属纳米晶体为纳米器件的设计提供了新的概念，具有广泛的潜在应用前景。目前，金属纳米晶的形成不能在单个原子的水平上进行控制。在这里，我们描述了一种新的制备多杂原子掺杂石墨基质的新方法，该基质由非常小的、尺寸很小的三维(3D)金属晶体装饰。我们用电子照射富硼贵金属包裹的自蔓延聚合物胶束，并实时产生掺杂的石墨化载体，单个Os原子在其上跳跃和迁移，在1 h内形成直径小至15 ？的3D纳米晶体。可以实时观察、量化和控制晶体生长。我们还合成了第一批混合Ru-Os3D纳米晶的例子。这项技术不仅可以生产大小为ngström的同质和异质晶体，还为研究纳米晶体的动力学及其从单原子组装的路径提供了新的实验见解。金属纳米晶体在越来越多的应用中被使用，但精确控制和理解它们的形成可能是困难的。在这里，作者展示了一条允许在逐个原子的水平上进行和观察金属纳米晶体的受控形成的路线。
Metal nanocrystals offer new concepts for the design of nanodevices with a range of potential applications. Currently the formation of metal nanocrystals cannot be controlled at the level of individual atoms. Here we describe a new general method for the fabrication of multi-heteroatom-doped graphitic matrices decorated with very small, ångström-sized, three-dimensional (3D)-metal crystals of defined size. We irradiate boron-rich precious-metal-encapsulated self-spreading polymer micelles with electrons and produce, in real time, a doped graphitic support on which individual osmium atoms hop and migrate to form 3D-nanocrystals, as small as 15 Å in diameter, within 1 h. Crystal growth can be observed, quantified and controlled in real time. We also synthesize the first examples of mixed ruthenium–osmium 3D-nanocrystals. This technology not only allows the production of ångström-sized homo- and hetero-crystals, but also provides new experimental insight into the dynamics of nanocrystals and pathways for their assembly from single atoms. Metal nanocrystals are used in an ever growing list of applications, but precise control and understanding of their formation can be difficult. Here, the authors show a route that allows the controlled formation of metal nanocrystals to be carried out and observed at an atom-by-atom level.
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影响因子：
56.9
作者：
Oh, Myoung Hwan;Yu, Taekyung;Hyeon, Taeghwan
通讯作者：
Hyeon, Taeghwan
影响因子：
8.4
作者：
Chamberlain, Thomas W.;Zoberbier, Thilo;Khlobystov, Andrei N.
通讯作者：
Khlobystov, Andrei N.
金属原子在应变石墨烯上的迁移和局域化
影响因子：
8.6
作者：
Cretu, Ovidiu;Krasheninnikov, Arkady V.;Banhart, Florian
通讯作者：
Banhart, Florian
影响因子：
2.3
作者：
Herberhold, M;Yan, H;Milius, W
通讯作者：
Milius, W
影响因子：
5.5
作者：
Kiss, Eva;Keszthelyi, Tamas;Hakkel, Orsolya
通讯作者：
Hakkel, Orsolya