Journal ArticleDOI
Mega-electron-volt proton irradiation on supported and suspended graphene: A Raman spectroscopic layer dependent study
S. Mathew,T. K. Chan,Da Zhan,Kalon Gopinadhan,A. Roy Barman,M. B. H. Breese,Sankar Dhar,Zexiang Shen,Thirumalai Venkatesan,John T. L. Thong +9 more
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TLDR
Graphene samples with 1, 2, and 4 layers and 1'+'1 folded bi-layers and graphite have been irradiated with 2 MeV protons at fluences ranging from 1'×'1015' to 6'× '1018' ions/cm2.Abstract:
Graphene samples with 1, 2, and 4 layers and 1 + 1 folded bi-layers and graphite have been irradiated with 2 MeV protons at fluences ranging from 1 × 1015 to 6 × 1018 ions/cm2. The samples were characterized using visible and UV Raman spectroscopy and Raman microscopy. The ion-induced defects were found to decrease with increasing number of layers. Graphene samples suspended over etched holes in SiO2 have been fabricated and used to investigate the influence of the substrate SiO2 for defect creation in graphene. While Raman vibrational modes at 1460 cm−1 and 1555 cm−1 have been observed in the visible Raman spectra of substantially damaged graphene samples, these modes were absent in the irradiated-suspended monolayer graphene.read more
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Spectroscopic characterization of ion-irradiated multi-layer graphenes
Akira Tsukagoshi,Shin-ichi Honda,Ryo Osugi,Hiraku Okada,Masahito Niibe,Mititaka Terasawa,Ryuji Hirase,Hirokazu Izumi,Hideki Yoshioka,Keisuke Niwase,Eiji Taguchi,Kuei-Yi Lee,Masaki Oura +12 more
TL;DR: In this article, low-energy Ar ions were irradiated to multi-layer graphenes and the damage process, the local electronic states, and the degree of alignment of the basal plane were investigated.
Journal ArticleDOI
Investigation of Substrate Swell-Induced Defect Formation in Suspended Graphene upon Helium Ion Implantation
He Shixuan,He Shixuan,Wanyi Xie,Yongna Zhang,Fang Shaoxi,Daming Zhou,Zhiyou Zhang,Jinglei Du,Chunlei Du,Deqiang Wang +9 more
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Multiwavelength Raman Scattering Spectroscopy Study of Graphene Synthesized on Si(100) and SiO2 by Microwave Plasma‐Enhanced Chemical Vapor Deposition
Journal ArticleDOI
Study of supported CVD graphene irradiated by He and Au ions
Petr Malinský,M. Cutroneo,V. Hnatowicz,James Stammers,Jan Luxa,Kateřina Szőkölová,Zdenĕk Sofer,Anna Macková +7 more
TL;DR: In this article, a graphene monolayer deposited on the SiO2/Si substrate by means of Chemical Vapour Deposition (CVD) was irradiated using He and Au ions.
Journal ArticleDOI
Band gap opening and surface morphology of monolayer graphene induced by single ion impacts of argon monomer and dimer ions
Jagnaseni Pradhan,S.K. Srivastava,Magudapathy Palanivelu,Saravanan Kothalamuthu,S. Balakrishnan,Soumya Sarkar,S. Mathew,S. Mathew,Thirumalai Venkatesan,Thirumalai Venkatesan,Thirumalai Venkatesan +10 more
TL;DR: In this article, the authors observed craters at the ion impacts are in the underlying copper substrate, which pull down the graphene layer conformally towards them, introducing disorder into graphene.
References
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