❖ A new highly fluorescent material with exceptional optical properties has been developed using phosphorene, cystine, and gold (Ph-Cys-Au)

❖ It can be used as a visual sensing platform for detecting anti-cancer drug MTX overdosage of which has toxic effect on lungs, stomach, and heart.

❖ Monitoring therapeutic drugs and their elimination is crucial because they may cause severe side effects on the human body.

❖ Methotrexate (MTX) is a widely used anti-cancer drug.

❖ The MTX value of more than 10 µM in blood plasma is hazardous if it remains in the system for more than 10 hours. 

❖ It will be resulting in poisoning effects on the lungs, ulcers of the stomach, and heart stroke.