What does this research mean for the field?

Aqueous-phase synthesis of Mn-doped ZnInS/ZnS core/shell quantum dots enhances their absolute quantum yield and singlet oxygen generation, enabling their use as sensitive nanoprobes for detecting organic pollutants such as trinitrophenol. Novelty: ClaimNovelty.METHODOLOGICAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

Develop low-toxicity, water-soluble manganese-doped ZnInS/ZnS core/shell quantum dots with improved optical emission and singlet oxygen generation for environmental sensing.

September 14, 2026ChemistryOpen Access

Aqueous Synthesis of Mn-Doped ZnInS/ZnS Core/Shell Quantum Dots with Enhanced Optical Properties and Sensitivity for Priority Pollutants

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Authors

RMRodney MalulekeUniversity of Johannesburg OOOluwatobi S. OluwafemiUniversity of Johannesburg

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Implication

Experimental study demonstrates enhanced optical emission and selective pollutant sensing by manganese-doped quantum dots, indicating utility for environmental monitoring.

Key Points

Develop low-toxicity, water-soluble manganese-doped ZnInS/ZnS core/shell quantum dots with improved optical emission and singlet oxygen generation for environmental sensing.
Synthesized core/shell ZnInS/ZnS quantum dots in the aqueous phase while introducing manganese dopants and testing different capping agents, including thioglycolic acid, gelatin, and citrate.
Characterized quantum dot size, photoluminescence lifetimes, and singlet oxygen quantum yields, followed by exposure assays to organic pollutants including trinitrophenol, dichlorophenol, naphthalene, phenanthrene, and pyrene.
Synthesized quantum dots had an average particle diameter of 7.40 nm, with manganese incorporation doubling the absolute quantum yield at optimal concentrations before excess doping induced non-radiative recombination.
Thioglycolic acid- and gelatin-capped nanocrystals produced higher singlet oxygen quantum yields than formulations stabilized by citrate and thioglycolic acid.
Manganese-doped quantum dots selectively detected trinitrophenol at concentrations up to 620 µM via luminescence quenching that followed a linear Stern–Volmer relationship, while alternative organic pollutants caused luminescence enhancement.

Cite This Study

Maluleke et al. (2026) studied this question.

synapsesocial.com/papers/6aa7b2b20926e14a848b129f https://doi.org/10.3390/chemistry8090128

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Implication

Experimental study demonstrates enhanced optical emission and selective pollutant sensing by manganese-doped quantum dots, indicating utility for environmental monitoring.

Aqueous Synthesis of Mn-Doped ZnInS/ZnS Core/Shell Quantum Dots with Enhanced Optical Properties and Sensitivity for Priority Pollutants

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Member takes

Implication

Key Points

Cite This Study

Aqueous Synthesis of Mn-Doped ZnInS/ZnS Core/Shell Quantum Dots with Enhanced Optical Properties and Sensitivity for Priority Pollutants

Discussion

Member takes

Implication

Key Points

Cite This Study

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