WS quantum dots harvesting sonication assisted liquid exfoliation for the electrochemical sensing of xanthine

• Published in: New journal of chemistry Vol. 46; no. 35; pp. 1766 - 1772
• Main Authors: Sakthivel, Arunkumar, Chandrasekaran, Anitha, Soosaimanickam, Charlin, Li, Chen-Zhong, Alwarappan, Subbiah
• Format: Journal Article
• Published: 12.09.2022
• ISSN: 1144-0546; 1369-9261
• DOI: 10.1039/d2nj03446h

WS 2 quantum dots (WS 2 QDs) were prepared by sonication assisted liquid exfoliation in dimethyl formamide (DMF) and dimethyl sulfoxide (DMSO). The as-prepared WS 2 QDs were characterized by spectroscopic techniques such as UV-visible, photoluminescence and Raman spectroscopy. Further, the crystallinity was identified by XRD and the surface morphology by HR-TEM. WS 2 QDs were then utilized as a platform for the electrochemical detection of xanthine and it exhibited a limit of detection and sensitivity of 0.118 μM (S/N = 3) and 7.872 μA cm −2 μM −1 , respectively. Further, the proposed sensor was found to be linear in the 1-100 μM range. Hence, it is evident that WS 2 QDs can be employed as an electrochemical platform for various sensing and bio-sensing applications. WS 2 quantum dots (QDs) were prepared by sonication assisted liquid exfoliation in dimethyl formamide (DMF) and dimethyl sulfoxide (DMSO).