Fabrication of Nanopore in MoS2-Graphene vdW Heterostructure by Ion Beam Irradiation and the Mechanical Performance

Abstract

Nanopore structure presents great application potential especially in the area of biosensing. The two-dimensional (2D) vdW heterostructure nanopore shows unique features, while research around its fabrication is very limited. This paper proposes for the first time the use of ion beam irradiation for creating nanopore structure in 2D vdW graphene-MoS2 heterostructures. The formation process of the heterostructure nanopore is discussed first. Then, the influence of ion irradiation parameters (ion energy and ion dose) is illustrated, based on which the optimal irradiation parameters are derived. In particular, the effect of stacking order of the heterostructure 2D layers on the induced phenomena and optimal parameters are taken into consideration. Finally, uniaxial tensile tests are conducted by taking the effect of irradiation parameters, nanopore size and stacking order into account to demonstrate the mechanical performance of the heterostructure for use under a loading condition. The results would be meaningful for expanding the applications of heterostructure nanopore structure, and can arouse more research interest in this area.

The electronic and interfacial properties of a vdW heterostructure composed of penta-PdSe2and biphenylene monolayers

“…More importantly, the absence of dangling bonds endows 2D materials with great potential and excellent stacking stability to construct vdW heterostructures in an arbitrary sequence. 5 Since the discovery of graphene, 6 significant efforts have been devoted to the design of vdW heterostructures by stacking various 2D sheets, including graphene, 7,8 penta-graphene, 9,10 graphitic carbon nitride, 11,12 transition metal-carbides, 13,14 and boron nitrides, 15,16 for their potential applications in the fields like energy storage, [17][18][19] photocatalysis, 20,21 and optoelectronic devices. [22][23][24] It is also worth mentioning that extensive research is still underway to design and synthesize vdW heterostructures with desired properties under various conditions.…”

Response of Bilayer and Trilayer Graphene to High-Energy Heavy Ion Irradiation

“…Both BLG and TLG are very promising materials for nanomembrane fabrication (due to graphene’s high mechanical strength and sub-nanometre thickness [ 3 ]), and high-energy heavy ion irradiation is a well-established technique for nanomembrane production in other types of materials (most often polymers). By tuning ion irradiation parameters, nanopores of desired sizes can be produced, and thus different applications (such as gas and liquid separation, or even water desalination) can be targeted [ 3 , 4 , 42 , 43 , 44 , 45 , 46 , 47 ].…”

Recent progresses on ion beam irradiation induced structure and performance modulation of two-dimensional materials

“…Moreover, the effects of the ion irradiation phenomenon on the uniaxial tensile behavior were also uncovered, and the control of interlayer distance by ion irradiation was discussed, which revealed the efficiency of performance modulation by ion beam irradiation. The ion irradiation technique was also adopted for the creation of nanopore structures in 2D vdW heterostructures, 76,124 which exhibited great application potential in biosensing, 125 water desalination, 126 gas separation, 127 etc . Other 2D heterostructures, such as AlGaAs/GaAs 128 and WSe 2 /SiC 129 were investigated in detail regarding their ion irradiation-induced structural modulation.…”