Nanostructured Scrolls from Graphene Oxide for Microjet Engines

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• 作者：Kun Yao ; Manoj Manjare ; Christopher A. Barrett ; Bo Yang ; Tina T. Salguero ; Yiping Zhao
• 刊名：The Journal of Physical Chemistry Letters
• 出版年：2012
• 出版时间：August 16, 2012
• 年：2012
• 卷：3
• 期：16
• 页码：2204-2208
• 全文大小：259K
• 年卷期：v.3,no.16(August 16, 2012)
• ISSN：1948-7185

文摘

Layered heterostructures containing graphene oxide (GO) nanosheets and 20鈥?5 nm bimetal coatings can detach easily from a Si substrate upon sonication鈥攕pontaneously forming freestanding, micrometer-sized scrolls with GO on the outside鈥攄ue to a combination of material stresses and weak bonding between GO layers. Simple procedures can tune the scroll diameters by varying the thicknesses of the metal films, and these results are confirmed by both experiment and modeling. The selection of materials determines the stresses that control the rolling behavior, as well as the functionality of the structures. In the GO/Ti/Pt system, the Pt is located within the interior of the scrolls, which can become self-propelled microjet engines through O₂ bubbling when suspended in aqueous H₂O₂.

Keywords:

multilayered heterostructure; nanostructure; graphene oxide; scroll; nanomotor