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We report a deterministic 2D material (2DM) transfer method to assembleany-stacking-order heterostructures incorporating suspended ultra-thin 2Dmaterials, such as single-layer graphene (SLG) and bilayer graphene (BLG). Thetransfer procedure relies on a single-step preparation nitrocellulosemicro-stamp, which combines both outstanding adhesion and softness. It permitsthe dry pick-up of naked 2D crystals (graphene, MoS$_2$, and hBN) directly froma SiO$_2$ substrate, and to precisely transfer them on substrates or trenches.Optical and Raman data show that no significant defect is introduced upontransfer, even in suspended SLG and BLG. The areas transferred range up $\sim$1000 $\mu$m$^2$ on substrate. High-yield transfer of suspended ultra-thin 2DMdoes not require critical point drying for areas up to 15 $\mu$m$^2$ orsuspension heights down to 160 nm. To demonstrate the method's capabilities, weassembled on-substrate and suspended optical cavities tuning BLG's Ramanscattering intensity by factors of 19 and 4, respectively. This resilient andrapid 2DM transfer procedure will accelerate the fabrication of manyheterostructures and permit versatile suspension of 2DMs for research intwistronics, straintronics, and nano-opto-electro-mechanical systems (NOEMS).

Thin-suspended 2D Materials: Facile, Versatile, and Deterministic Transfer Assembly