Sensitivity of adsorbed Inorganic gas molecules on C3N island single electron transistor
S. Rani 1, S.J. Ray 2
Department of Physics, Indian Institute of Technology Patna, Bihta, 801 103, Bihar, India
shivanirani436[at]gmail.com1, ray[at]iitp.ac.in2
C3N is a newly discovered two-dimensional Nanocrystal with finite band gap which makes it promising for applications in electronics and optics. Single Electron Transistor (SET) is a Nano-electronics device which can facilitate low power operation with Complementary Metal Oxide Semiconductor (CMOS) compatibility. In this work, we study the performance and operational behavior of C3N island based SET with inorganic molecule adsorbed on it, using First-principles calculations. We observed that the C3N is the perfect host material for adsorbing CO2 molecule. The electrostatics of the SET in various configuration was analyzed from the gate voltage dependence of total energy and the charge stability diagram. It was observed that the charge stability diagram of the SET is very much sensitive to the presence of the gas molecules near the island. The line scans taken in different parts of the charge stability diagram reveal the presence of the gas molecules uniquely in the form of distinct peaks. This suggests that such an SET can be used for sensing gas molecule as a future Nano-electronic sensor that can offer a maximum sensitivity up to a single molecule and operational over a wide temperature range.