Charge-induced high-performance actuation of borophene
Charge-induced high-performance actuation of borophene
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DOI：
10.1088/1361-6463/abc8b5
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发表时间：
2020-12
期刊：
影响因子：
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通讯作者：
V. V. Thanh-V.;Nguyen Duy Van;D. Truong;N. T. Hung
中科院分区：
文献类型：
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作者：
V. V. Thanh-V.;Nguyen Duy Van;D. Truong;N. T. Hung
硼烯是一种二维材料，由于其独特的电子和机械性能，在纳米材料领域得到了迅速的发展。在这项工作中，我们通过第一性原理计算证明了硼苯的独特性质使这种材料具有高性能的机电致动器。我们发现条形硼烯的杨氏模数约为376.55 N m−1，比石墨烯的杨氏模数(∼336N m−1)大，单位为N m−1。此外，空穴注入时，最大致动器应变可达1.67%，是相同空穴掺杂量(0.04e/原子)下石墨烯的7倍以上。因此，条形硼烯的每周工作密度高达22mJ m−3·nm，分别是石墨烯(0.78mJ m−3·nm)和金属1T-MoS2(2.05mJ m−3.nm)的28倍和11倍。此外，带状硼烯在电荷掺杂下仍保持了金属性质。因此，基于硼苯的致动器装置可以在较低的外加电压下工作。最后，研究了电荷掺杂对硼苯机械强度的影响。有趣的是，在电子掺杂的情况下，机械强度提高了15.8%。
Borophene, a two-dimensional material, has grown fast in the nanomaterials field because of its unique electronic and mechanical properties. In this work, we demonstrate that the unique properties of borophene make this material with a high-performance electromechanical actuator by using first-principles calculations. We find a high Young’s modulus about 376.55 N m−1 of a striped borophene, which is larger than that of graphene (∼336 N m−1) in the unit of N m−1. In addition, upon hole injection, maximum actuator strain is up to 1.67% that is over 7 times larger than that of graphene at the same value of hole doping (0.04 e/atom). Therefore, the striped borophene shows a high work-area-density per cycle of 22 MJ m−3·nm, it is approximately 28 and 11 times larger than that of graphene (0.78 MJ m−3·nm) and metallic 1T-MoS2 (2.05 MJ m−3·nm), respectively. Furthermore, the striped borophene still maintains the metal property under charge doping. Thus, an actuator device based on borophene can work under a low applied voltage. Finally, the charge doping effects on the mechanical strength of borophene are investigated. Interestingly, the mechanical strength is increased by 15.8% in the case of electron doping.