Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 8, Issue 37, Pages 24803-24809Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.6b06220
Keywords
graphene; ion irradiation; nanapore; defect; molecular dynamics
Funding
- Utah State University
Ask authors/readers for more resources
Ion beam irradiation is a promising approach to fabricate nanoporous graphene for various applications, including DNA sequencing, water desalination, and phase separation. Further advancement,of this approach and rational design of experiments all require improved mechanistic understanding of the physical drilling process. Here, we demonstrate that, by using oblique ion beam irradiation, the nanopore atnily is-significantly expanded to include more types of nanopores of tunable geometries. With the.hopping, sweeping, and shoving mechanisms, ions sputter carbon atoms even outside the ion impact zone, leading to extended damage particularly at Smaller-incident angles. Moreover, with lower energies, ions- may be absorbed to form-complex ion-carbon structures, making the graphene warped or curly at pore edges. Considering both-efficiency and quality, the optimal ion energy-is identified to be 1000 eV at an-incident angle of 30 with respect to the graphene sheet and 400-500 eV at higher incident angles, All of these results suggest the use of oblique ion beam and moderate energy levels to efficiently fabricate high-quality nanopores of tunable geometries in graphene for a wide range of applications.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available