Luminescent Silicon Nanocrystals as Metal Ion Sensors

被引：3
作者：
Stacy, Benjamin J. [1 ,2 ]
Nagasaki, Kara [1 ,2 ]
Korgel, Brian A. [1 ,2 ]
机构：
[1] Univ Texas Austin, McKetta Dept Chem Engn, Austin, TX 78712 USA
[2] Univ Texas Austin, Texas Mat Inst, Austin, TX 78712 USA
来源：
ACS NANO | 2024年 / 18卷 / 24期
关键词：
silicon nanocrystal; silicon quantum dot; photoluminescence; sensors; metal ions; CARBON QUANTUM DOTS; FLUORESCENT SENSORS; LABEL-FREE; PHOTOLUMINESCENCE; NANOPARTICLES; FACILE; PROBE; HYDROSILYLATION; EMISSION; DYNAMICS;
D O I：
10.1021/acsnano.4c02309
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
At relatively low concentrations in aqueous solution, Fe3+, Fe2+, Cu2+, and Ni2+ quench the photoluminescence (PL) of the undecenoic acid-capped silicon (Si) nanocrystals. The PL could be restored by adding a chelating agent, such as ethylenediaminetetraacetic acid (EDTA), to remove the ions. Fe3+ and Cu2+ also significantly increase the PL lifetime. Other metal ions, including Cd2+, Mn2+, Pb2+, Zn2+, In3+, K+, and Ca2+, had no effect on the Si nanocrystal PL. The limits of detection (LODs) for Fe3+ and Cu2+ of 370 and 150 nM, respectively, are low enough for metal ion sensing applications.
引用
收藏
页码：15744 / 15753
页数：10
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