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Herein, a heterostructural hexagonal@tetragonal GeO2 (HT‐GeO2) composite has been designed based on density functional theory (DFT) calculations and synthesized via an acidic‐heating route dealt with rapid cooling, where the inner hexagonal GeO2 (H‐GeO2) phase is covered by a porous layer of tetragonal GeO2 (T‐GeO2) owing to HF etching. Interestingly, the HT‐GeO2 electrode has a self‐optimizing effect...
In this work, we have presented a novel strategy to utilize as-synthesized yeast extract-stabilized Cu nanoclusters (Cu NCs) for sensitive and selective detection of S2−. The fluorescence intensity of Cu NCs was enhanced significantly in the presence of both Na2S2O8 and S2−. By virtue of this specific response, a Cu NC-based fluorescent turn-on sensor was developed, which allows the detection of S...
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