期刊
SCIENCE
卷 327, 期 5961, 页码 72-74出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1181735
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资金
- EPSRC [EP/H024107/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/H024107/1] Funding Source: researchfish
Self-assembly has proven a powerful means of preparing structurally intricate nanomaterials, but the mechanism is often masked by the common one-pot mixing procedure. We employed a flow system to study the steps underlying assembly of a previously characterized molybdenum oxide wheel 3.6 nanometers in diameter. We observed crystallization of an intermediate structure in which a central {Mo-36} cluster appears to template the assembly of the surrounding {Mo-150} wheel. The transient nature of the template is demonstrated by its ejection after the wheel is reduced to its final electronic state. The template's role in the self-assembly mechanism is further confirmed by the deliberate addition of the template to the reaction mixture, which greatly accelerates the assembly time of the {Mo-150} wheel and increases the yield.
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