Silicon Quantum Dot-Based Fluorescence Turn-On Metal Ion Sensors in Live Cells.
作者： Namasivayam Dhenadhayalan , Hsin-Lung Lee , Kanchan Yadav , King-Chuen Lin , Yih-Tyng Lin
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摘要: Multiple sensor systems are designed by varying aza-crown ether moiety in silicon quantum dots (SiQDs) for detecting individual Mg2+, Ca2+, and Mn2+ metal ions with significant selectivity sensitivity. The detection limit of can reach 1.81, 3.15, 0.47 μM, respectively. Upon excitation the SiQDs which coordinated ethers, photoinduced electron transfer (PET) takes place from to valence band core such that reduced probability electron–hole recombination may diminish subsequent fluorescence. fluorescence suppression caused PET effect will be relieved after selective ion is added. charge-electron binding force between hinders thereby restores SiQDs. design system based on “turn-on” while search appropriate ion. For practical application, sensing capabilities ...
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