Dragoman Mircea, Dinescu Adrian, Aldrigo Martino, Dragoman Daniela, Mohebbi Elaheh, Pavoni Eleonora, Laudadio Emiliano
National Institute for Research and Development in Microtechnologies (IMT), 077190 Voluntari, Ilfov, Romania.
Physics Faculty, University of Bucharest, P.O. Box MG-11, 077125 Bucharest, Romania.
Nanomaterials (Basel). 2024 Sep 24;14(19):1542. doi: 10.3390/nano14191542.
In this paper, we investigate various graphene monolayer nanomesh structures (diodes) formed only by nanoholes, with a diameter of just 20 nm and etched from the graphene layer in different shapes (such as rhombus, bow tie, rectangle, trapezoid, and triangle), and their electrical properties targeting electromagnetic energy harvesting applications. In this respect, the main parameters characterizing any nonlinear device for energy harvesting are extracted from tens of measurements performed on a single chip containing the fabricated diodes. The best nano-perforated graphene structure is the triangle nanomesh structure, which exhibits remarkable performance in terms of its characteristic parameters, e.g., a 420 Ω differential resistance for optimal impedance matching to an antenna, a high responsivity greater than 10 V/W, and a low noise equivalent power of 847 pW/√Hz at 0 V.
在本文中，我们研究了仅由纳米孔形成的各种石墨烯单层纳米网结构（二极管），这些纳米孔直径仅为20纳米，以不同形状（如菱形、领结形、矩形、梯形和三角形）从石墨烯层蚀刻而成，并针对电磁能量收集应用研究了它们的电学性质。在这方面，通过对包含制造的二极管的单个芯片进行数十次测量，提取了表征任何用于能量收集的非线性器件的主要参数。最佳的纳米穿孔石墨烯结构是三角形纳米网结构，其在特征参数方面表现出卓越性能，例如，用于与天线进行最佳阻抗匹配的420Ω微分电阻、大于10V/W的高响应度以及在0V时847pW/√Hz的低噪声等效功率。
