Journal article

Exfoliation Behavior of van der Waals Strings: Case Study of Bi2S3

Nripen Dhar, Nitu Syed, Md Mohiuddin, Azmira Jannat, Ali Zavabeti, Bao Yue Zhang, Robi S Datta, Paul Atkin, Nasir Mahmood, Dorna Esrafilzadeh, Torben Daeneke, Kourosh Kalantar-Zadeh



The family of crystals constituting covalently bound strings, held together by van der Waals forces, can be exfoliated into smaller entities, similar to crystals made of van der Waals sheets. Depending on the anisotropy of such crystals, as well as the spacing between their strings in each direction, van der Waals sheets or ribbons can be obtained after the exfoliation process. In this work, we demonstrate that ultrathin nanoribbons of bismuth sulfide (Bi2S3) can be synthesized via a high-power sonication process. The thickness and width of these ribbons are governed by the van der Waals spacings around the strings within the parent crystal. The lengths of the nanoribbons are initially limit..

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University of Melbourne Researchers


Awarded by ARC

Awarded by ARC Centre of Excellence FLEET

Funding Acknowledgements

This work was performed at the RMIT University Micro-Nano Research Facility (MNRF) and the RMIT Microscopy and Microanalysis Facility (RMMF) at RMIT University linked lab of the Australian Microscopy and Microanalysis Research Facility (AMMRF). The authors would like to acknowledge the technical assistance provided by staff in each of these facilities. The authors would also like to acknowledge the facilities and infrastructure supported through ARC grant DE150100427 and ARC Centre of Excellence FLEET (EI170100038) for the financial support.