Mesoscale assembly of chemically modified graphene into complex cellular networks.
Mesoscale assembly of chemically modified graphene into complex cellular networks.
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DOI：
10.1038/ncomms5328
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发表时间：
2014-07-07
影响因子：
16.6
通讯作者：
Saiz, Eduardo
中科院分区：
文献类型：
--
作者：
Barg, Suelen;Perez, Felipe Macul;Ni, Na;Pereira, Paula do Vale;Maher, Robert C.;Garcia-Tunon, Esther;Eslava, Salvador;Agnoli, Stefano;Mattevi, Cecilia;Saiz, Eduardo
石墨烯在电子学之外的广泛技术引入取决于我们将这种二维构建块组装成实际设备的三维结构的能力。为了实现这一目标，我们需要能够提供从纳米到宏观水平的化学和结构的精确控制的制造方法。在这里，我们描述了一种通用的技术，以建立超轻（密度≥1 mg cm−3）的蜂窝网络的基础上使用软模板和控制分离的化学改性石墨烯液体界面。这些新型结构可以被调整为具有优异的导电性、多功能的机械响应（弹性-脆性到弹性体、可逆变形、高能量吸收）和有机吸收能力（每克材料超过600 g）。该方法可用于揭示指导实用设备设计的基本原则，通过结合独特的机械和功能性能，将产生新的技术机会。 石墨烯的特性是众所周知的，但将这种原子级薄的材料变成三维设备仍然是一个挑战。在这里，作者报告了一种将化学修饰的石墨烯组装成三维蜂窝网络的组装过程，并控制了所得材料的物理性质。
The widespread technological introduction of graphene beyond electronics rests on our ability to assemble this two-dimensional building block into three-dimensional structures for practical devices. To achieve this goal we need fabrication approaches that are able to provide an accurate control of chemistry and architecture from nano to macroscopic levels. Here, we describe a versatile technique to build ultralight (density ≥1 mg cm−3) cellular networks based on the use of soft templates and the controlled segregation of chemically modified graphene to liquid interfaces. These novel structures can be tuned for excellent conductivity; versatile mechanical response (elastic-brittle to elastomeric, reversible deformation, high energy absorption) and organic absorption capabilities (above 600 g per gram of material). The approach can be used to uncover the basic principles that will guide the design of practical devices that by combining unique mechanical and functional performance will generate new technological opportunities. Graphene’s properties are well known, but turning this atomically thin material into three-dimensional devices remains a challenge. Here, the authors report an assembly process for chemically modified graphene into three-dimensional cellular networks, with control over the physical properties of the resulting materials.
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