Dual-emission carbon dots-copper nanoclusters ratiometric photoluminescent nano-composites for highly sensitive and selective detection of Hg2+

A novel dual-emission photoluminescent nano-materials of carbon dots-copper nanoclusters nano-composites is prepared for excellent sensitivity and selectivity toward Hg2+

Zili Li; Shujie Pang; Mao Wang; Miao Wu; Pengjun Li; Jinna Bai; Xudong Yang

2021

Scholarcy highlights

  • A novel dual-emission photoluminescent nano-materials of carbon dots-copper nanoclusters nano-composites is prepared for excellent sensitivity and selectivity toward Hg2+
  • The nano-composites are composed of blue photoluminescent CDs and red photoluminescent CuNCs with similar excitation wavelengths through the electrostatic assembly
  • The red photoluminescence of CuNCs was inhibited by the nano-composites exposed to Hg2+, while the blue photoluminescence of CDs remained stable
  • When the Hg2+ solution is added, the color of test paper transforms from pink to blue immediately
  • The nano-composites are very important for efficient and sensitive detection of Hg2+, which show broad application prospects in environmental analysis, food safety detection, biological detection and medical diagnosis in daily life

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