Journal article

A simple and ubiquitous device for picric acid detection in latent fingerprints using carbon dots

Arunkumar Kathiravan, Annasamy Gowri, Venkatesan Srinivasan, Trevor A Smith, Muthupandian Ashokkumar, Mariadoss Asha Jhonsi



This work addresses the synthetic optimization of carbon dots (CDs) and their application in sensing picric acid from latent fingerprints by exploiting a smartphone-based RGB tool. The optimization of the synthesis of CDs is investigated towards achieving shorter reaction time, better product yield and fluorescence quantum efficiency. Precursors such as citric acid and thiourea were chosen for the synthesis of CDs. Among the various synthetic methodologies, it is found that the pyrolysis method offers ∼50% product yield within 15 min. The morphology and optical properties of the prepared CDs are characterized using the typical microscopic and spectroscopic techniques, respectively. The synth..

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Awarded by SERB

Awarded by SERB Research Scientists scheme

Awarded by ARC Centre of Excellence Scheme

Funding Acknowledgements

M. A. J. acknowledges the SERB for the TARE project (Ref: TAR/2018/00048, Dt: 18.02.2019). M. A. J. also acknowledges the SAIF, IIT Madras for analytical measurements. V. S. thanks the Department of Chemistry and BSACIST for the Senior Research Fellowship. A. K. thanks the SERB Research Scientists scheme (SB/SRS/2018-2019-05/CS, Dated: 30/01/2019). T. A. S. acknowledges the support from the ARC Centre of Excellence Scheme (CE170100026).