Beilstein J. Nanotechnol.2021,12, 304–318, doi:10.3762/bjnano.12.25
electrically contact the graphene sheet and actuate the resonators electrostatically. The motion of the devices is detected using a Michelson interferometer [48].
Figure 6a depicts a secondary electron HIM image of a patterned trampoline grapheneresonator. A He ion current of 3 pA was employed at an
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Figure 1:
FIB-o-mat overview. (a) For patterning the beam spot follows a rasterized beam path with a defined ...
Beilstein J. Nanotechnol.2016,7, 685–696, doi:10.3762/bjnano.7.61
the coordination numbers of bulk atoms and edge atoms of graphene. It is shown that as the size of a grapheneresonator decreases, the edge stress depending on the edge structure of a grapheneresonator plays a critical role on both its dynamic and sensing performances. We found that the resonance
behavior of graphene can be tuned not only through edge stress but also through nonlinear vibration, and that the detection sensitivity of a grapheneresonator can be controlled by using the edge stress. Our study sheds light on the important role of the finite-size effect in the effective design of
graphene resonators for their mass sensing applications.
Keywords: edge stress; grapheneresonator; mass sensing; nonlinear vibration; size effect; sensitivity; Introduction
Recent advances in nanotechnology have allowed for the development of nano-electro-mechanical system (NEMS) devices that can
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Figure 1:
(a) Effective elastic moduli of graphene sheets as a function of their sizes and edge structures. H...