Engineering Graphene Mechanical Systems
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- 作者：Maxim K. Zalalutdinov ; Jeremy T. Robinson ; Chad E. Junkermeier ; James C. Culbertson ; Thomas L. Reinecke ; Rory Stine ; Paul E. Sheehan ; Brian H. Houston ; Eric S. Snow
- 刊名：Nano Letters
- 出版年：2012
- 出版时间：August 8, 2012
- 年：2012
- 卷：12
- 期：8
- 页码：4212-4218
- 全文大小：417K
- 年卷期：v.12,no.8(August 8, 2012)
- ISSN：1530-6992
文摘
We report a method to introduce direct bonding between graphene platelets that enables the transformation of a multilayer chemically modified graphene (CMG) film from a 鈥減aper mache-like鈥?structure into a stiff, high strength material. On the basis of chemical/defect manipulation and recrystallization, this technique allows wide-range engineering of mechanical properties (stiffness, strength, density, and built-in stress) in ultrathin CMG films. A dramatic increase in the Young鈥檚 modulus (up to 800 GPa) and enhanced strength (sustainable stress 鈮? GPa) due to cross-linking, in combination with high tensile stress, produced high-performance (quality factor of 31鈥?00 at room temperature) radio frequency nanomechanical resonators. The ability to fine-tune intraplatelet mechanical properties through chemical modification and to locally activate direct carbon鈥揷arbon bonding within carbon-based nanomaterials will transform these systems into true 鈥渕aterials-by-design鈥?for nanomechanics.