Chavda Chintan P, Srivastava Ashok, Vaughan Erin, Wang Jianwei, Gartia Manas Ranjan, Veronis Georgios
Division of Electrical and Computer Engineering, Louisiana State University Baton Rouge LA USA
Department of Mechanical Engineering, The Pennsylvania State University, University Park Pennsylvania 16803 USA.
Nanoscale Adv. 2025 Jun 3;7(14):4303-4312. doi: 10.1039/d5na00162e. eCollection 2025 Jul 10.
Two-dimensional material graphene has proven to have remarkable electrical and photonic properties, opening the door to a wide range of uses, including employment under the harsh conditions of space. The creation of graphene on various substrate types is known to be possible a number of approaches, including direct deposition and the substrate transfer process. In this work, we used an argon plasma, methane as a carbon source, and a nanoCVD-8G graphene reactor to deposit monolayer graphene (MLG) on transition metal substrates for studying the effects of gamma irradiation on the physical and electronic properties. Graphene's crystalline structure is investigated utilizing Raman and X-ray Photo Electron Spectroscopy (XPS) techniques before and after gamma irradiation. The results show that point defects predominate in the damage following gamma irradiation. The defective structure and electronic properties are connected in light of density functional theory (DFT) simulations of pristine and defective graphene.
二维材料石墨烯已被证明具有卓越的电学和光学特性，为包括在恶劣太空条件下的应用在内的广泛用途打开了大门。已知通过多种方法，包括直接沉积和衬底转移工艺，可以在各种类型的衬底上制备石墨烯。在这项工作中，我们使用氩等离子体、甲烷作为碳源以及nanoCVD - 8G石墨烯反应器在过渡金属衬底上沉积单层石墨烯（MLG），以研究伽马辐射对其物理和电子特性的影响。利用拉曼光谱和X射线光电子能谱（XPS）技术在伽马辐射前后对石墨烯的晶体结构进行了研究。结果表明，伽马辐射后的损伤中主要是点缺陷。根据原始和有缺陷石墨烯的密度泛函理论（DFT）模拟，将缺陷结构与电子特性联系起来。
