Green Synthesis of Fluorescent Palladium Nanoclusters
AbstractMetal nanoclusters, with dimensions between atomic and nanoparticles, have attracted a great deal of attention due to their significantly unusual properties. Water-soluble palladium nanoclusters (Pd NCs) with blue-green fluorescence were synthesized by a water bath heating method, with methionine as a stabilizer and ascorbic acid as a reducing agent. We investigated the optimal synthesis conditions, stability, and pH response of the obtained products in detail. The synthesized materials were characterized by ultraviolet-absorption spectroscopy, fluorescence spectroscopy, high-resolution transmission electron microscopy, and atomic force microscopy. These experimental results showed that the Pd NCs had a small size of ~1.91 nm, with a uniform size distribution. Additionally, the Pd NCs emitted blue-green fluorescence under ultraviolet light with a quantum yield of 5.47%. Notably, both stabilizers and reducing agents used in this synthesis method are nutrients for humans, non-toxic, and harmless. This method could be viewed as a biologically friendly and green way of preparing fluorescent metal nanoclusters. The as-prepared fluorescent Pd NCs also possessed excellent fluorescence detection ability and were very sensitive to low concentrations of hemoglobin, with a linear response in the range of 0.25–3.5 μM and a detection limit of 50 nM. View Full-Text
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Peng, Y.; Wang, P.; Luo, L.; Liu, L.; Wang, F. Green Synthesis of Fluorescent Palladium Nanoclusters. Materials 2018, 11, 191.
Peng Y, Wang P, Luo L, Liu L, Wang F. Green Synthesis of Fluorescent Palladium Nanoclusters. Materials. 2018; 11(2):191.Chicago/Turabian Style
Peng, Yan; Wang, Pei; Luo, Liang; Liu, Lang; Wang, Fu. 2018. "Green Synthesis of Fluorescent Palladium Nanoclusters." Materials 11, no. 2: 191.
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