Electrochemically Reduced Single-Layer MoS2 Nanosheets: Characterization, Properties, and Sensing Applications

• Published in: Small (Weinheim an der Bergstrasse, Germany) Germany), 2012-07, Vol.8 (14), p.2264-2270
• Main Authors: Wu, Shixin, Zeng, Zhiyuan, He, Qiyuan, Wang, Zhijuan, Wang, Shi Jie, Du, Yaping, Yin, Zongyou, Sun, Xuping, Chen, Wei, Zhang, Hua
• Format: Article
• Language: English
• Subjects: Ascorbic Acid - analysis; Biosensing Techniques - instrumentation; dopamine; Dopamine - analysis; electrochemical reduction; Electrochemistry; Electrodes; glucose; MoS2 nanosheets; Nanostructures - chemistry; Oxidation-Reduction; Sensitivity and Specificity; sensors; Uric Acid - analysis
• ISSN: 1613-6810; 1613-6829
• DOI: 10.1002/smll.201200044

The electrochemical study of single‐layer, 2D MoS2 nanosheets reveals a reduction peak in the cyclic voltammetry in NaCl aqueous solution. The electrochemically reduced MoS2 (rMoS2) shows good conductivity and fast electron transfer rate in the [Fe(CN)6]3‐/4− and [Ru(NH3)6]2+/3+ redox systems. The obtained rMoS2 can be used for glucose detection. In addition, it can selectively detect dopamine in the presence of ascorbic acid and uric acid. This novel material, rMoS2, is believed to be a good electrode material for electrochemical sensing applications. Single‐layer, 2D MoS2 nanosheets and their composites are used to modify the glassy carbon electrode (GCE). After electrochemical reduction, the electrodes exhibit good conductivity and fast electron transfer rate in the [Fe(CN)6]3−/4− and [Ru(NH3)6]2+/3+ redox systems. These electrodes can be used for sensing of glucose and dopamine.