A switchable fluorescent quantum dot probe based on aggregation/disaggregation mechanism

Liu, Jianbo; Yang, Xiaohai; Wang, Kemin; Yang, Ronghua; Ji, Haining; Yang, Liyan; Wu, C.L.

doi:10.1039/c0cc03993d

Cited by 96 publications

(77 citation statements)

References 30 publications

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“…Fluoride plays various important roles in environmental, industrial and biological processes and the ability to sense fluoride has attracted increasing attention [94]. By utilizing the disassemble procedure, we have developed a facile switchable fluorescent QD probe for F − ions [95]. As shown in Figure 4, the cysteamine capped CdTe QDs undergo spontaneous self-aggregation via NH-N hydrogen bonds, which results in efficient fluorescence self-quenching due to energy transfer mechanism.…”

Section: Figurementioning

confidence: 99%

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Fluorescent nanoparticles for chemical and biological sensing

Liu

Yang

et al. 2011

Sci. China Chem.

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Fluorescent nanoparticles (NPs), including quantum dots (QDs), dye-doped NPs, and rare earth-based NPs, etc., have been a major focus of research and development during the past decade. The impetus behind such endeavors can be attributed to their unique chemical and optical properties, such as bright fluorescence, high photostability, large Stocks shift and flexible processability. The introduction of fluorescent NPs into analytical chemistry has opened up new venues for fluorescent analysis. In this review, we focus on the developments and analytical applications of fluorescent NPs in the chemical and biological sensing of pH, ions, organic compounds, small biological molecules, nucleic acids, proteins, virus and bacteria. The review also points out the in vitro and in vivo imaging application of fluorescent NPs at the cell and body levels. Meanwhile, the advantages of NPs brought field of sensing and signal transductions are also discussed. fluorescence, sensing, quantum dots, dye-doped nanoparticles, rare earth-based nanoparticles

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Section: Figurementioning

confidence: 99%

“…(1) Self-aggregation due to internanoparticle hydrogen bonding interaction; (2) disaggregation due to the substitution of hydrogen bonds[95].…”

mentioning

confidence: 99%

Fluorescent nanoparticles for chemical and biological sensing

Liu

Yang

et al. 2011

Sci. China Chem.

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“…Cysteamine can provide a short inter particle distance, which is essential for effective aggregation (Liu et al, 2011).…”

Section: The Detection Principle Of Aptasensormentioning

confidence: 99%

A simple and sensitive fluorimetric aptasensor for the ultrasensitive detection of arsenic(III) based on cysteamine stabilized CdTe/ZnS quantum dots aggregation

Ensafi

Kazemifard

Rezaei

2016

Biosensors and Bioelectronics

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“…Recently, some studies reported that fluorescence intensity of QDs was quenched at closer distance via the interaction such as van der Waals attraction [13], hydrogen bonding [14], or covalent binding [15]. Fluorescence intensity recovered or increased when QDs disaggregated with longdistance interval [14].…”

Section: Introductionmentioning

confidence: 98%

Rapid detection of acrylamide in food using a fluorescent sensing method based on functional CdSe/ZnS quantum dots

et al. 2013

2013 Ieee Sensors

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In this paper, a fluorescent sensing method based on functional CdSe/ZnS quantum dots (QDs) was investigated for rapid detection of acrylamide. The functional QDs were prepared by binding them with N-acryloxysuccinimide (NAS). Then NAS-QDs complexes were mixed with acrylamide solutions, and polymerization occurred in the presence of photo-initiator under UV irradiation. The reaction increased the distance between QDs, leading to the increase of fluorescence intensity compared with that no acrylamide existed. The detection limit and linear range using this method were 5 × 10 -7 mol L -1 and 5 × 10 -7 to 1 × 10 -2 mol L -1 , respectively. Compared with LC-MS/MS method, this method could be applied to food detection with similar sensitivity and selectivity but less time and cost.

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A switchable fluorescent quantum dot probe based on aggregation/disaggregation mechanism

Abstract: Here we report a facile switchable fluorescent QD probe for F(-) ions, which is based on the hydrogen bonding-driven aggregation and the analyte-triggered disaggregation.

Cited by 96 publications

References 30 publications

Fluorescent nanoparticles for chemical and biological sensing

Fluorescent nanoparticles for chemical and biological sensing

A simple and sensitive fluorimetric aptasensor for the ultrasensitive detection of arsenic(III) based on cysteamine stabilized CdTe/ZnS quantum dots aggregation

Rapid detection of acrylamide in food using a fluorescent sensing method based on functional CdSe/ZnS quantum dots

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