Ananda Ewing-Boyd - Hampton University
Co-Author(s): Dulitha Jayakodige, Tikaram Neupane, Sheng Yu, William Moore, Bagher Tabibi, Uwe Hommerich, Pat McCormick, and Felix Jaetae Seo, Advanced Center for Laser Science and Spectroscopy (CREST), Department of Physics; Advanced Physical Modeling and Simulation for 21st Century Scientists (RISE), Department of Atmospheric and Planetary Sciences; Hampton University,VA
Two-dimensional atomic layers of transition metal dichalcogenides are of great interest for piezoelectricity-induced biomedical sensing. The piezoelectricity is a mechano-electric effect which produces electricity in response to mechanical compression of tensile- and shear-stress. The piezoelectricity arises from the polarization change at the ground electronic state which includes ionic, electronic, dipole, space charge, or interfacial polarizations. For the MoS2/WSe2 hetero-junction, single arrays of hexagonal honeycombs in the zigzag direction for both MoS2 and WSe2 are stacked on top of each other to generate interfacial polarization. The output voltages of MoS2/WSe2 nano-ribbon hetero-junction with 1% and 8% tensile strain gives 0.04 V and 0.185 V, respectively. Therefore, the heterostructure atomic layers can be utilized for biomedical sensing including heart-rate and muscle dynamics.Not Submitted
Funder Acknowledgement(s): This work is supported by NSF HRD-1137747 and HRD-1345209.
Faculty Advisor: Felix Jaetae Seo, firstname.lastname@example.org
Role: Two-dimensional atomic layer study