Multifunctional light-controllable nanozyme enabled bimodal fluorometric/colorimetric sensing of mercury ions at ambient pH

Nanozymes: powerful catalytic materials for environmental pollutant detection and degradation

“…On the other hand, the inert Hg–X layer formed is able to cover the active sites and surfaces of nanozymes or induce the variation of nanozyme dispersion state, thus decreasing the latter's ability in catalyzing reactions. 58,64,65 As a representative example, our group recently reported a bimodal fluorescence/colorimetric assay of Hg 2+ based on a multifunctional light-controllable nanozyme (Mn-doped CdTe quantum dots, Mn-CdTe). 58 Small CdTe particles showed a bright fluorescence at 565 nm, and the polyvalent Mn species doped in the material endowed it with light-triggered oxidase-mimetic activity to catalyze the TMB color reaction (Fig.…”

“…58,64,65 As a representative example, our group recently reported a bimodal fluorescence/colorimetric assay of Hg 2+ based on a multifunctional light-controllable nanozyme (Mn-doped CdTe quantum dots, Mn-CdTe). 58 Small CdTe particles showed a bright fluorescence at 565 nm, and the polyvalent Mn species doped in the material endowed it with light-triggered oxidase-mimetic activity to catalyze the TMB color reaction (Fig. 4C).…”

Rational Integration of Nanozyme Probe and Smartphone Device for On‐Site Analysis

“…Inspired by this, Niu et al designed a light-controllable MnÀ CdTe nanozyme with OXD-like activity and luminescence property. [152] The internal luminescence of CdTe provided the fluorometric channel, meanwhile, Mn offered the colorimetric channel. After the introduction of Hg 2 + , the luminescence of MnÀ CdTe was dynamically quenched, as well as the active sites were recovered, thus leading to the decrease of light-triggered OXDlike activity.…”

“…Inspired by this, Niu et al. designed a light‐controllable Mn−CdTe nanozyme with OXD‐like activity and luminescence property [152] . The internal luminescence of CdTe provided the fluorometric channel, meanwhile, Mn offered the colorimetric channel.…”

“…iii) The linear relationship between the HSB stack (Hue) value and the content of Hg 2 + in a fluorometric mode. Reproduced from ref [152]. with permission from Elsevier.…”