Fig. 3: Real-time observation of few-layer MoS2 disintegration and subsequent coalescence using BF-TEM imaging.

a Pristine few-layer MoS2 at room temperature and the corresponding b formation of small etched regions (pits) upon slow (∼25 °C/min) heating to 550 °C. c Complete disintegration of same few-layer MoS2 sample when ramped to 650 °C at a fast heating rate (∼25 °C/sec). d–g Sequential snapshots of bright field (BF)-TEM images taken at different times showing further coalescence of the disintegrated MoS2 (scale bars: a: 50 nm, d: 10 nm).