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The capabilities of the mechanical resonator-based nanosensors in detectingultra-small mass or force shifts have driven a continuing exploration of thepalette of nanomaterials for such application purpose. Based on large-scalemolecular dynamics simulations, we have assessed the applicability of a newclass of carbon nanomaterials for the nanoresonator usage, i.e., the singlewall carbon nanotube (SWNT) network. It is found that the SWNT networks inheritthe excellent mechanical properties from the constituent SWNTs, possessing ahigh natural frequency. However, although a high quality factor is suggestedfrom the simulation results, it is hard to obtain an unambiguous Q-factor dueto the existence of vibration modes in addition to the dominant mode. Thenonlinearities resulting from these extra vibration modes are found to existuniformly under various testing conditions including different initialactuations and temperatures. Further testing shows that these modes can beeffectively suppressed through the introduction of axial strain, leading to anextremely high quality factor in the order of 109 estimated from the SWNTnetwork with 2% tensile strain. Additional studies indicate that the carbonrings connecting the SWNTs can also be used to alter the vibrational propertiesof the resulting network. This study suggests that the SWNT network can be agood candidate for the applications as nanoresonators.

Tuning the Resonance Properties of 2D Carbon Nanotube Networks towards Mechanical Resonator