Abstract
There is a strong correlation between the concentration of creatinine in human urine and the overall health of the kidneys. Therefore, there has been a persistent need for a rapid, and cost-effective quantitative method to assay creatinine levels in urine. Herein, green fluorescent La3+ doped titanium carbide nanosheets (La3+-doped Ti3C2 NSs) are fabricated via HF etching method by using Ti3AlC2 as MAX phase material and La(NO3)3 as a doping agent. As synthesized fluorescent La3+-doped Ti3C2 NSs are stable, showing green fluorescence under UV light. The as-synthesized La3+-doped Ti3C2 NSs act as a fluorescent sensor for the sensitive recognition of creatinine biomarker. The La3+-doped Ti3C2 NSs-based fluorescence method showed a fluorescence quenching at emission wavelength 518 nm towards creatinine with a linear range of 0.25–7.5 μM and detection limit of 63.44 nM. The paper strip based on La3+-doped Ti3C2 NSs was developed for the visual identification of creatinine. Furthermore, La3+-doped Ti3C2 NSs were used as probes for imaging of Saccharomyces cerevisiae cells. Also, the as-fabricated La3+-doped Ti3C2 NSs propose a quick response giving a cost-effective analytical strategy for the selective assay of creatinine in biofluids (plasma and urine).
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