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Published on: October 8, 2021
Multifunctional Tradescantia pallida Derived Copper-Nitrogen Codoped Green Carbon Dots as Nanozyme, Dual Sensor, and
Khushboo Warjurkar1, Rajan Patyal1, Vinay Sharma1
1Department of Biosciences and Bioengineering, Indian Institute of Technology Jammu, Jammu 181221, India.
Abstract:
The integration of optical, catalytic, and fluorescent properties in a green eco-friendly product opens avenues for multifunctionality in diverse applications ranging from biosensing and environmental monitoring to smart textiles. Green precursor derived carbon dots (CDs) offer opportunities to tailor their properties to achieve multifunctionality in a single material. Herein, multifunctional copper and nitrogen codoped CDs (Cu,N-GCDs) are reported, which show employability as a nanozyme, colorimetric hydrogen sensor, fluorometric iron sensor, anticounterfeiting agent, and ink for smart textiles. The reported Cu,N-GCDs show peroxidase (POD)-like activity induced by the Cu and N doping. This property is successfully employed in colorimetric H2O2 sensing in a wide concentration range of 2 to 1500 mM with a limit of detection (LOD) of 121 μM. The Cu,N-GCDs also exhibited the sensitive and selective fluorometric detection of Fe3+ ions with an LOD of 38.95 pM. Moreover, Cu,N-GCDs were employed in making invisible fluorescent ink to draw on paper and cotton cloth, exhibiting their applicability as easy-to-use security technology for information encryption and anticounterfeiting and contributing to aesthetic fashion designing in smart textiles.
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