Nitrogen and sulphur co-doped carbon quantum dots and their optical power limiting properties

Abstract

For the sake of good performance in nonlinear optical (NLO) applications, two S,N-codoped carbon quantum dots were synthesized from 3,7-dinitro-10<italic>H</italic>-phenothiazine under different conditions of alkaline solution (<bold>D-1</bold> from NaOH, <bold>D-2</bold> from ammonia).