Ratiometric Fluorescence Platform Based on Modified Silicon Quantum Dots and Its Logic Gate Performance

Xiangqian Li; Zhan Zhou; Chengcheng Zhang; Yuhui Zheng; Jinwei Gao; Qianming Wang

doi:10.1021/acs.inorgchem.8b00788

Ratiometric Fluorescence Platform Based on Modified Silicon Quantum Dots and Its Logic Gate Performance

Xiangqian Li, Zhan Zhou, Chengcheng Zhang, Yuhui Zheng, Jinwei Gao, Qianming Wang

Research output: Contribution to journal › Article › peer-review

57 Scopus citations

Abstract

A novel optical nanoprobe based on silicon quantum dots (SiQDs) has been assembled through a one-pot low-temperature (40 °C) treatment by using 3-(aminopropyl)trimethoxysilane (APTMS) and ascorbic acid (AA) as two precursors. The water-soluble SiQDs demonstrate intense green luminescence in aqueous environment and the excitation-dependent feature has been explored. Meanwhile, the incorporation of salicylaldehyde (SA) serves to suppress the emission of SiQDs effectively via nucleophilic reaction and an "on-off" change is observed. Furthermore, the addition of Zn²⁺ can lead to evolution of emission peaks, and the green band at 500 nm gradually shifts toward the blue side at 455 nm. The corresponding ratiometric signal changes (I₄₅₅/I₅₀₀) can accurately determine the Zn²⁺ concentration and the limit of detection is calculated to be 0.17 μM in the linear range between 1 and 100 μM. In this research, a molecular logic gate (AND) system has been well established by using SA and Zn²⁺ as two inputs. The fluorescence emission changes based on SiQDs will shed new light on the development of functional sensors at the nanoscale level.

Original language	English (US)
Pages (from-to)	8866-8873
Number of pages	8
Journal	Inorganic Chemistry
Volume	57
Issue number	15
DOIs	https://doi.org/10.1021/acs.inorgchem.8b00788
State	Published - Aug 6 2018

ASJC Scopus subject areas

Physical and Theoretical Chemistry
Inorganic Chemistry

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10.1021/acs.inorgchem.8b00788

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title = "Ratiometric Fluorescence Platform Based on Modified Silicon Quantum Dots and Its Logic Gate Performance",

abstract = "A novel optical nanoprobe based on silicon quantum dots (SiQDs) has been assembled through a one-pot low-temperature (40 °C) treatment by using 3-(aminopropyl)trimethoxysilane (APTMS) and ascorbic acid (AA) as two precursors. The water-soluble SiQDs demonstrate intense green luminescence in aqueous environment and the excitation-dependent feature has been explored. Meanwhile, the incorporation of salicylaldehyde (SA) serves to suppress the emission of SiQDs effectively via nucleophilic reaction and an {"}on-off{"} change is observed. Furthermore, the addition of Zn2+ can lead to evolution of emission peaks, and the green band at 500 nm gradually shifts toward the blue side at 455 nm. The corresponding ratiometric signal changes (I455/I500) can accurately determine the Zn2+ concentration and the limit of detection is calculated to be 0.17 μM in the linear range between 1 and 100 μM. In this research, a molecular logic gate (AND) system has been well established by using SA and Zn2+ as two inputs. The fluorescence emission changes based on SiQDs will shed new light on the development of functional sensors at the nanoscale level.",

author = "Xiangqian Li and Zhan Zhou and Chengcheng Zhang and Yuhui Zheng and Jinwei Gao and Qianming Wang",

note = "Funding Information: Q.M. acknowledges the support from National Natural Science Foundation of China (grant no. 21371063) and Guangdong Science and Technology plan (2016A050502053). Z.Z. acknowledges the Scientific Research Fund of Henan Provincial Education Department (17A150016) and Natural Science Foundation of Henan (162300410200) for financial assistance. Y.H. thanks the Research Fund of Higher Education Committee of Guangdong Province (GDJ2016003).",

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doi = "10.1021/acs.inorgchem.8b00788",

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AU - Li, Xiangqian

AU - Zhou, Zhan

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AU - Gao, Jinwei

AU - Wang, Qianming

N1 - Funding Information: Q.M. acknowledges the support from National Natural Science Foundation of China (grant no. 21371063) and Guangdong Science and Technology plan (2016A050502053). Z.Z. acknowledges the Scientific Research Fund of Henan Provincial Education Department (17A150016) and Natural Science Foundation of Henan (162300410200) for financial assistance. Y.H. thanks the Research Fund of Higher Education Committee of Guangdong Province (GDJ2016003).

PY - 2018/8/6

Y1 - 2018/8/6

N2 - A novel optical nanoprobe based on silicon quantum dots (SiQDs) has been assembled through a one-pot low-temperature (40 °C) treatment by using 3-(aminopropyl)trimethoxysilane (APTMS) and ascorbic acid (AA) as two precursors. The water-soluble SiQDs demonstrate intense green luminescence in aqueous environment and the excitation-dependent feature has been explored. Meanwhile, the incorporation of salicylaldehyde (SA) serves to suppress the emission of SiQDs effectively via nucleophilic reaction and an "on-off" change is observed. Furthermore, the addition of Zn2+ can lead to evolution of emission peaks, and the green band at 500 nm gradually shifts toward the blue side at 455 nm. The corresponding ratiometric signal changes (I455/I500) can accurately determine the Zn2+ concentration and the limit of detection is calculated to be 0.17 μM in the linear range between 1 and 100 μM. In this research, a molecular logic gate (AND) system has been well established by using SA and Zn2+ as two inputs. The fluorescence emission changes based on SiQDs will shed new light on the development of functional sensors at the nanoscale level.

AB - A novel optical nanoprobe based on silicon quantum dots (SiQDs) has been assembled through a one-pot low-temperature (40 °C) treatment by using 3-(aminopropyl)trimethoxysilane (APTMS) and ascorbic acid (AA) as two precursors. The water-soluble SiQDs demonstrate intense green luminescence in aqueous environment and the excitation-dependent feature has been explored. Meanwhile, the incorporation of salicylaldehyde (SA) serves to suppress the emission of SiQDs effectively via nucleophilic reaction and an "on-off" change is observed. Furthermore, the addition of Zn2+ can lead to evolution of emission peaks, and the green band at 500 nm gradually shifts toward the blue side at 455 nm. The corresponding ratiometric signal changes (I455/I500) can accurately determine the Zn2+ concentration and the limit of detection is calculated to be 0.17 μM in the linear range between 1 and 100 μM. In this research, a molecular logic gate (AND) system has been well established by using SA and Zn2+ as two inputs. The fluorescence emission changes based on SiQDs will shed new light on the development of functional sensors at the nanoscale level.

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Ratiometric Fluorescence Platform Based on Modified Silicon Quantum Dots and Its Logic Gate Performance

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