Molecular dynamics computer simulations are employed to investigate processes leading to particle ejection from free-standing two-layered graphene irradiated by keV argon gas cluster projectiles. The effect of the primary kinetic energy and the projectile size on the ejection process is investigated. It has been found that both these parameters have a pronounced influence on the emission of particles. The interaction between argon projectiles and graphene is strong regardless of graphene's minimal thickness. A significant portion of the primary kinetic energy is deposited into the sample. Part of this energy is used for particle emission, which is substantial. As a result, circular nanopores of various dimensions are created depending on the bombardment conditions. A major part of the deposited energy is also dispersed in a form of acoustic waves. Different mechanisms leading to particle ejection and defect formation are identified depending on the projectile energy per atom. The implications of the results to a novel analytical approach in Secondary Ion Mass Spectrometry based on ultrathin free-standing graphene substrates and a transmission geometry are discussed.

使用分子动力学计算机模拟来研究导致由keV氩气簇射弹照射的自立式两层石墨烯引起的颗粒喷射过程。研究了主要动能和弹丸尺寸对弹射过程的影响。已经发现，这两个参数对粒子的发射具有显着的影响。不管石墨烯的最小厚度如何，氩弹丸和石墨烯之间的相互作用都很强。主要动能的很大一部分沉积在样品中。该能量的一部分用于大量的粒子发射。结果，根据轰击条件产生了各种尺寸的圆形纳米孔。沉积能量的主要部分也以声波的形式分散。根据每个原子的射弹能量，确定了导致粒子弹出和缺陷形成的不同机制。讨论了结果对基于超薄自立式石墨烯基底和透射几何结构的二次离子质谱分析新方法的意义。