School of Electrical and Electronic Engineering, Yonsei University, 50 Yonsei-ro, Seoul, 03722, Republic of Korea.
Department of Engineering Mechanics, Center for Mechanics and Materials and Center for Flexible Electronics Technology, AML, Tsinghua University, 100084, Beijing, China.
Nat Commun. 2018 Apr 12;9(1):1417. doi: 10.1038/s41467-018-03870-0.
Efficient and highly functional three-dimensional systems that are ubiquitous in biology suggest that similar design architectures could be useful in electronic and optoelectronic technologies, extending their levels of functionality beyond those achievable with traditional, planar two-dimensional platforms. Complex three-dimensional structures inspired by origami, kirigami have promise as routes for two-dimensional to three-dimensional transformation, but current examples lack the necessary combination of functional materials, mechanics designs, system-level architectures, and integration capabilities for practical devices with unique operational features. Here, we show that two-dimensional semiconductor/semi-metal materials can play critical roles in this context, through demonstrations of complex, mechanically assembled three-dimensional systems for light-imaging capabilities that can encompass measurements of the direction, intensity and angular divergence properties of incident light. Specifically, the mechanics of graphene and MoS, together with strategically configured supporting polymer films, can yield arrays of photodetectors in distinct, engineered three-dimensional geometries, including octagonal prisms, octagonal prismoids, and hemispherical domes.
高效且功能强大的三维系统在生物学中无处不在，这表明类似的设计架构在电子和光电技术中可能很有用，将其功能水平扩展到传统的二维平面平台所无法达到的水平。受折纸启发的复杂三维结构、剪纸艺术具有实现从二维到三维转变的潜力，但目前的例子缺乏必要的功能材料、力学设计、系统级架构和集成能力，无法用于具有独特操作特性的实际设备。在这里，我们通过展示具有复杂的机械组装三维系统的光成像能力，证明二维半导体/半金属材料可以在这方面发挥关键作用，该系统可以涵盖对入射光的方向、强度和角发散特性的测量。具体来说，石墨烯和 MoS2 的力学特性，以及经过策略配置的支撑聚合物膜，可以在包括八边形棱镜、八棱柱和半球形穹顶在内的独特的工程三维几何形状中产生不同的光电探测器阵列。
