Observation of defect density dependent elastic modulus of graphene

Hussain, Tanveer, 1981- (author): School of Science and Technology, University of New England , Armidale NSW2351, Australia

Zheng, Xiaoxiao (author): Shenzhen Research Institute of Shandong University , Shenzhen 518057, China.; Shandong Technology Centre of Nanodevices and Integration, School of Microelectronics, Shandong University , Jinan 250101, China.

Ye, Xiaoling (author): Shenzhen Research Institute of Shandong University , Shenzhen 518057, China.; Shandong Technology Centre of Nanodevices and Integration, School of Microelectronics, Shandong University , Jinan 250101, China.

Makumi, Sylvester Wambua (author): Uppsala universitet,Institutionen för materialvetenskap

Jafri, Syed Hassan Mujtaba, 1979- (author): Uppsala universitet,Tillämpad materialvetenskap

Daukiya, Lakshya (author): Institut de Sciences des Matériaux de Mulhouse, UMR 7361-CNRS, UHA , Mulhouse, 68057, France

Simon, Laurent (author): Institut de Sciences des Matériaux de Mulhouse, UMR 7361-CNRS, UHA , Mulhouse, 68057, France.

Karton, Amir (author): School of Science and Technology, University of New England , Armidale NSW2351, Australia.

Leifer, Klaus, 1965- (author)

(creator_code:org_t)

Related links:: https://doi.org/10.1...; show more...; https://urn.kb.se/re...; https://doi.org/10.1...; show less...

Abstract Subject headings

The recent decade has witnessed a tremendous development of graphene applications in many fields; however, as one of the key considerations, the mechanical properties of graphene still remain largely unexplored. Herein, by employing focused ion beam irradiation, graphene with various defect levels is obtained and further investigated by using Raman spectroscopy and scanning tunneling microscopy. Specially, our atomic force microscopy based nanomechanical property measurement demonstrates a clear defect density dependent behavior in the elastic modulus of graphene on a substrate as the defect density is higher than a threshold value of 1012 cm−2, where a clear decay is observed in the stiffness of graphene. This defect density dependence is mainly attributed to the appearance of amorphous graphene, which is further confirmed with our molecular dynamics calculations. Therefore, our reported result provides an essential guidance to enable the rational design of graphene materials in nanodevices, especially from the perspective of mechanical properties.

By the author/editor: Li, Hu, 1986-; Gürbüz, Emel; Haldar, Soumyajy ...; Hussain, Tanveer ...; Zheng, Xiaoxiao; Ye, Xiaoling; show more...; Makumi, Sylveste ...; Duan, Tianbo; Jafri, Syed Hass ...; Daukiya, Lakshya; Simon, Laurent; Karton, Amir; Sanyal, Biplab; Leifer, Klaus, 1 ...; show less...

About the subject

NATURAL SCIENCES: NATURAL SCIENCES; and Physical Science ...; and Condensed Matter ...

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