Inorganic Nanoparticles Modified Molecular Beacons as Fluorescent DNA Biosensors

Meng Meng Song; Wen Juan Guo; Zhao Dai; Kai Li Qiu; Jun Fu Wei

doi:10.4028/www.scientific.net/AMM.372.111

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vol. 372Inorganic Nanoparticles Modified Molecular Beacons...

Inorganic Nanoparticles Modified Molecular Beacons as Fluorescent DNA Biosensors

Abstract:

This study reports inorganic nanoparticles modified molecular beacons as fluorescent DNA biosensors. MBs were modified by using CdTe quantum dots as energy donors and 4-(4'-(dimethylamino) phenylazo) benzoic acid, black hole quencher 1 and Au nanoparticles as energy acceptors, respectively. CdTe quantum dots were linked to molecular beacons when 1-ethyl-3-(3-dimethylaminopropyl) carbodi-imide hydrochloride was added. The fluorescence intensity of the modified molecular beacons decreased tremendously compared to the fluorescence intensity of CdTe quantum dots, which indicated that the fluorescence resonance energy transfer occurred between the donors and acceptors. The results indicated that this type of molecular beacons has high specificity and can be used to distinguish complementary DNA and its mutants.

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Applied Mechanics and Materials (Volume 372)

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111-114

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https://doi.org/10.4028/www.scientific.net/AMM.372.111

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Online since:

August 2013

Authors:

Meng Meng Song, Wen Juan Guo, Zhao Dai, Kai Li Qiu, Jun Fu Wei

Keywords:

Biosensor, Fluorescence Resonance Energy Transfer (FRET), Molecular Beacon, Quantum Dot (QD)

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