2D sensor (IMAGE) DOE/Lawrence Berkeley National Laboratory Caption Left: Atomic-resolution electron microscopy image of the bilayer and trilayer regions of Re0.5Nb0.5S2 revealing its stacking order. Right: Real-space charge transfer plot showing the charge transfer from Re0.5Nb0.5S2 to the NO2 molecule. Color key: Re shown in navy; Nb in violet; S in yellow; N in green; H in gray; O in blue; and C in red. Credit Alex Zettl/Berkeley Lab Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.