Fig. 3: Thermionic emission diode behavior in h-BN/graphene NOEMS.
From: A monolithically sculpted van der Waals nano-opto-electro-mechanical coupler
a Optical micrograph image of the arrays of nanosized vdW NOEMS. Scale bar = 5 μm. b Art view of the architecture of the “vintage” vacuum diode made of vdW heterostructure. c Thermionic emission current density JEmission–VCollector curves in a VCollector range of ±40 V recorded in a typical device. The same data are plotted in a log scale in the inset. Traces and retraces are recorded. Data were obtained at 300 K in a vacuum chamber of about 10−2 mbar. d TID radiation effects characterization of the emission current in a typical vdW thermionic emission diode device shown in (a)
