Dynamic characteristics of rectangular single-layered black phosphorus-based mass sensor

Abstract

Abstract Recently, anisotropic black phosphorus (BP) has been reported to have significant physical and mechanical properties, and BP-based mass sensors have the latent applications in detecting the mass of nanoparticles attached on BP. In this paper, an orthotropic plate model (OPM) attached concentrated mass and molecular dynamics (MD) simulations are adopted to investigate the dynamic characteristics of rectangular single-layered BP-based (RSLBP-based) mass sensors. The influences of mass, position of the attachment and RSLBP size on the fundamental frequency of RSLBP-based mass sensor are discussed. The results show that when attachment mass increases, or the position of attachment moves from the edge to the middle of RSLBP, the fundamental frequency of the RSLBP-based mass sensor decreases. The fundamental frequency of RSLBP-based mass sensors decreases more significantly with increasing the attachment mass when the size of RSLBP is very small. The results calculated by OPM attached concentrated mass are agreed well with the results calculated by MD simulations, which indicates that the OPM attached concentrated mass can forecast the dynamic characteristics of RSLBP-based mass sensors significantly.