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- W2883463669 abstract "Sensitive and selective detection of calcium ions (Ca2+) is important since many biological processes are triggered and regulated by the change of Ca2+ concentrations. Here, we develop a new Ca2+ indicator based on peptide-functionalized carbon dots (f-CDs). The synthetic peptide was designed with a hydrophilic head that mimic the Ca2+ binding loop in calmodulin (CaM) protein, and a hydrophobic tail which can form stable interaction with CDs through π-π stacking. CDs functionalized with the synthetic peptide can specifically capture Ca2+ ions in biologically relevant media, leading to efficient fluorescence quenching. The quenched fluorescence intensity is linear with the concentration of Ca2+ ions over a wide range, from 5 × 10−6 to 10−2 M. Furthermore, cell viability assays show that f-CDs exhibit negligible cytotoxicity to neuroblastoma cells up to a concentration of 50 μg/mL. These results show that f-CDs are promising for sensitive and selective detection of Ca2+ ions in biological applications." @default.
- W2883463669 created "2018-08-03" @default.
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- W2883463669 date "2018-11-01" @default.
- W2883463669 modified "2023-10-16" @default.
- W2883463669 title "Peptide-functionalized carbon dots for sensitive and selective Ca2+ detection" @default.
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- W2883463669 doi "https://doi.org/10.1016/j.snb.2018.07.073" @default.
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