Temperature dependent Raman spectroscopy of electrochemically exfoliated few layer black phosphorus nanosheets

Abstract

The present investigation deals with temperature dependant Raman spectroscopy of electrochemically exfoliated few layer black phosphorus nanosheets. The temperature dependent study illustrates that softening of the A¹_g, B_2g and A²_g modes occurs as the temperature increases from 78 K to 573 K. The calculated temperature coefficients for the A¹_g, B_2g and A²_g modes were found to be −0.028 cm⁻¹ K⁻¹, −0.028 cm⁻¹ K⁻¹ and −0.018 cm⁻¹ K⁻¹ respectively. The observed phenomenon can be utilized for characterizing other emerging two-dimensional inorganic layered materials with atomic thickness.