高性能石墨烯纤维及其柔性光电传感器应用
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- 英文论文题名：High Performance Graphene Fiber and Their Applications in Flexible Photoelectric Sensors
- 论文作者：张甲 ; 王晓娜 ; 王振龙 ; 胡平安
- 英文论文作者：Jia Zhang ; Xiaona Wang ; Zhenlong Wang ; Ping An Hu ; Key Laboratory of Micro-systems and Micro-structures Manufacturing ; Ministry of Education ; Harbin Institute of Technology
- 年：2016
- 作者机构：哈尔滨工业大学微系统与微结构制造教育部重点实验室;
- 论文关键词：石墨烯纤维 ; 仿贝壳结构 ; 螺旋 ; 多尺度 ; 高韧性
- 会议召开时间：2016-07-01
- 会议录名称：中国化学会第30届学术年会摘要集-第四十一分会：纳米材料与器件
- 语种：中文
- 分类号：TP212;TQ343
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第四十一分会 ; 纳米材料与器件
- 会议地点：中国辽宁大连
- 主办单位：中国化学会
- 学会名称：中国化学会
- 页数：1
- 文件大小：268k
- 原文格式：D
- 会议级别：全国
摘要
可编织、可穿戴器件在微能源、运动传感器、健康监测以及智能机器人方面具有广泛的应用。传统的金属箔膜和半导体材料难以同时具备高灵敏和柔性的要求。以石墨烯等为代表的二维材料拥有优异的力学、电学、光学等性能,同时可以方便的制备成薄膜、纤维、块体等结构,非常适用于柔性可穿戴器件。基于跨尺度制造的理念,创造性地将微观—介观—宏观尺度相结合,构建出了多级结构的纤维。利用电化学剥离的高质量石墨烯片和聚乙烯醇为原料,在溶液中使两者自组装形成仿贝壳的"砖"和"泥"结构;并将溶液纺织成纤维状,进一步将纤维纺织成螺旋结构,从而形成同时具有仿贝壳结构和螺旋结构的纤维。基于多尺度变形耗散外力做功的原理,该纤维实现了断裂伸长率达414%,韧性达640J/g。利用该方法,可批量制备出了多种二维材料与聚合物形成的复合纤维,证实了该方法具有普适性。此外,当在碳酸钙/聚乙烯醇纤维中掺入碲化镉量子线,首次实现了通过机械力调控纤维发光极性。
Wearable devices have wide applications in micro-energy, motion sensing, health monitoring, and intelligent robots. The traditional metallic foils or films and semiconductors have unrealized both high sensibility and ductile characteristics simultaneously. Recently 2D materials, such as graphene, would fulfill the requirements since their outstanding electrical, optical and mechanical properties and feasible to fabricate into films, fibers and bulk structures. Here we demonstrate that nacre-like fibers can be produced by shear-induced self-assembly of nanoplatelets. The synergy between two structural motifs-nanoscale brick-and-mortar stacking of platelets and microscale twisting of the fibers gives rise to high stretchability(414%) and gravimetric toughness(640 J/g). These unique mechanical properties originate from the multiscale deformation regime involving solid-state self-organization processes that lead to efficient energy dissipation. Incorporating luminescent CdT e nanowires into these fibers imparts the new property of mechanically tunable circularly polarized luminescence.
Wearable devices have wide applications in micro-energy, motion sensing, health monitoring, and intelligent robots. The traditional metallic foils or films and semiconductors have unrealized both high sensibility and ductile characteristics simultaneously. Recently 2D materials, such as graphene, would fulfill the requirements since their outstanding electrical, optical and mechanical properties and feasible to fabricate into films, fibers and bulk structures. Here we demonstrate that nacre-like fibers can be produced by shear-induced self-assembly of nanoplatelets. The synergy between two structural motifs-nanoscale brick-and-mortar stacking of platelets and microscale twisting of the fibers gives rise to high stretchability(414%) and gravimetric toughness(640 J/g). These unique mechanical properties originate from the multiscale deformation regime involving solid-state self-organization processes that lead to efficient energy dissipation. Incorporating luminescent CdT e nanowires into these fibers imparts the new property of mechanically tunable circularly polarized luminescence.
引文
[1]Zhang,J.et al.Nat.Commun.2016,7:10701.
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