Extended Data Fig. 4: vdW-devices-on-tip and QTM flat side devices.
From: Quantum twisting microscopy of phonons in twisted bilayer graphene
a, Optical image of a monolayer graphene QTM tip. b, Optical image of a graphite sample used for the graphite versus graphite measurement shown in Fig. 1. c, Optical image of the MLG/hBN/graphite sample used for MLG versus MLG experiments shown in Figs. 2 and 3. This sample also has a region with 3L-WSe2 for tip contact area imaging (see Extended Data Fig. 6).
