Gold-Mediated Exfoliation of Ultralarge Optoelectronically-Perfect Monolayers

Sujay B Desai; Surabhi R Madhvapathy; Matin Amani; Daisuke Kiriya; Mark Hettick; Mahmut Tosun; Yuzhi Zhou; Madan Dubey; Joel W Ager 3rd; Daryl Chrzan; Ali Javey

doi:10.1002/adma.201506171

Gold-Mediated Exfoliation of Ultralarge Optoelectronically-Perfect Monolayers

Adv Mater. 2016 Jun;28(21):4053-8. doi: 10.1002/adma.201506171. Epub 2016 Mar 23.

Authors

Sujay B Desai^{1

2

3}, Surabhi R Madhvapathy^{1

2}, Matin Amani^{1

2

3}, Daisuke Kiriya^{1

2

3}, Mark Hettick^{1

2

3}, Mahmut Tosun^{1

2

3}, Yuzhi Zhou⁴, Madan Dubey⁵, Joel W Ager 3rd^{2

4}, Daryl Chrzan^{2

4}, Ali Javey^{1

2

3}

Affiliations

¹ Electrical Engineering and Computer Sciences, University of California, Berkeley, CA, 94720, USA.
² Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA.
³ Berkeley Sensor and Actuator Center, University of California, Berkeley, CA, 94720, USA.
⁴ Materials Science and Engineering Department, University of California, Berkeley, CA, 94720, USA.
⁵ Sensors and Electronic Devices Directorate, US Army Research Laboratory, Adelphi, MD, 20723, USA.

PMID: 27007751
DOI: 10.1002/adma.201506171

Abstract

Gold-mediated exfoliation of ultralarge optoelectronically perfect monolayers with lateral dimensions up to ≈500 μm is reported. Electrical, optical, and X-ray photo-electron spectroscopy characterization show that the quality of the gold-exfoliated flakes is similar to that of tape-exfoliated flakes. Large-area flakes allow manufacturing of large-area mono-layer transition metal dichalcogenide electronics.

Keywords: MoS2; TMDC; gold exfoliation; large-area monolayers; layered materials.