TY  - EJOU
AU  - Kumar, Naresh 
AU  - Kumar, Anuj 
AU  - Mishra, Abhishek K. 

TI  - DFT Insights into the Detection of NH<sub>3</sub>, AsH<sub>3</sub>, PH<sub>3</sub>, CO<sub>2</sub>, and CH<sub>4</sub> Gases with Pristine and Monovacancy Phosphorene Sheets
T2  - Computers, Materials \& Continua

PY  - 2026
VL  - 87
IS  - 1
SN  - 1546-2226

AB  - Density functional theory (DFT) calculations were employed to investigate the adsorption behavior of NH<sub>3</sub>, AsH<sub>3</sub>, PH<sub>3</sub>, CO<sub>2</sub>, and CH<sub>4</sub> molecules on both pristine and mono-vacancy phosphorene sheets. The pristine phosphorene surface shows weak physisorption with all the gas molecules, inducing only minor changes in its structural and electronic properties. However, the introduction of mono-vacancies significantly enhances the interaction strength with NH<sub>3</sub>, PH<sub>3</sub>, CO<sub>2</sub>, and CH<sub>4</sub>. These variations are attributed to substantial charge redistribution and orbital hybridization in the presence of defects. The defective phosphorene sheet also exhibits enhanced adsorption energies, along with favorable sensitivity and recovery characteristics, highlighting its potential as a promising gas sensor for NH<sub>3</sub>, AsH<sub>3</sub>, PH<sub>3</sub>, CO<sub>2</sub>, and CH<sub>4</sub> at ambient conditions.
KW  - Phosphorene; vacancy; defects; DFT; interaction; sensitivity

DO  - 10.32604/cmc.2025.074430