Jump to main content
Jump to site search


A carbon-dot-based dual-emission probe for ultrasensitive visual detection of copper ions

Author affiliations

Abstract

In this work, we successfully developed an ultrasensitive dual-emission fluorescent sensor (CRB) for instant visual determination of Cu2+ by modifying a Cu-sensitive rhodamine B derivative (RB) onto photostable carboxyl modified carbon dots (CDs). The RB moiety of the CRB was extremely sensitive to Cu2+ and exhibited significant orange fluorescence in 1 second, while the blue CD moiety was stable to Cu2+. As a result, significant fluorescent color transformation from blue to orange could be observed in the presence of Cu2+, which could be applied to rapid visualization of Cu2+. The CRB exhibited good selectivity and excellent sensitivity to Cu2+, and the detection limit (LOD) was estimated to be 2 ppb. Moreover, a portable test strip has been successfully developed and applied for the visual inspection of Cu2+, which provides a convenient and reliable approach to monitor Cu2+ on site without resorting to instrumental analysis.

Graphical abstract: A carbon-dot-based dual-emission probe for ultrasensitive visual detection of copper ions

Back to tab navigation

Supplementary files

Publication details

The article was received on 27 Sep 2018, accepted on 31 Oct 2018 and first published on 31 Oct 2018


Article type: Paper
DOI: 10.1039/C8NJ04854A
Citation: New J. Chem., 2018, Advance Article
  •   Request permissions

    A carbon-dot-based dual-emission probe for ultrasensitive visual detection of copper ions

    Y. Kuang, L. Chen, J. Lu, X. Tian, C. Yang, Y. Li, L. Lu and Y. Nie, New J. Chem., 2018, Advance Article , DOI: 10.1039/C8NJ04854A

Search articles by author

Spotlight

Advertisements