Formation of graphene nanostructures using laser induced vaporization of entrapped water

Sukhyun Hong, Minsuk Park, Soonhyung Kwon, Jehyun Oh, Sungmin Bong, Balu Krishnakumar, Sang Yong Ju

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


Facile construction of graphene nanostructures are potentially important for fundamental studies and various applications owing to its transparency and mechanical strength. Here we found that focused laser irradiation of a graphene/entrapped water/hydrophobic substrate leads to vaporization of entrapped water and consequent formation of graphene nanostructures. Graphene mechanically exfoliated on a hydrophobicized Si substrate was served as a transformable and impermeable nanocontainer in which water anisotropically and slowly diffuses from the weak edges into the van der Waals (vdW)-coupled interstitial volume between graphene and the substrate. Time-lapsed Raman mappings show that water entrapment promotes progressive lowering of the frequencies of the G and 2D bands of graphene and exhibits slower diffusion owing to vdW decoupling of substrate-induced doping and biaxial strain of graphene with hydrophobic substrate. Moreover, vaporized entrapped water promotes nanostructures by graphene sliding and bulging actions. This methodology represents viable approach to produce nanostructures from two dimensional materials.

Original languageEnglish
Pages (from-to)84-92
Number of pages9
Publication statusPublished - 2021 Oct 15

Bibliographical note

Funding Information:
The authors acknowledged H.K., and E.K. for initial help. This research was mainly financially supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science, and Technology ( 2020R1F1A107698311 , 2020R1A4A101773711 , and in part 2019R1A6A3A13091240 ). B.K. thanks award from Yonsei Frontier Program for Young Postdoctoral Researchers 2020.

Publisher Copyright:
© 2021 Elsevier Ltd

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)


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