  We fabricate paper-supported semiconducting devices by rubbing a layered
molybdenum disulfide (MoS2) crystal onto a piece of paper, similarly to the
action of drawing/writing with a pencil on paper. We show that the abrasion
between the MoS2 crystal and the paper substrate efficiently exfoliates the
crystals, breaking the weak van der Waals interlayer bonds and leading to the
deposition of a film of interconnected MoS2 platelets. Employing this simple
method, that can be easily extended to other 2D materials, we fabricate
MoS2-on-paper broadband photodectectors with spectral sensitivity from the
ultraviolet (UV) to the near-infrared (NIR). We also used these paper-based
photodetectors to acquire pictures of objects by mounting the photodetectors in
a homebuilt single-pixel camera setup.
