title: Detection of DNA based on fluorescence resonance energy transfer of polyelectrolyte-protected CdTe quantum dots as energy donors.
abstract: The approach for DNA detection was established by using a fluorescence resonance energy transfer (FRET) system, in which the energy donor was poly-diallyldimethylammonium chloride-protected quantum dots and the energy receptor was ethidium bromide (EB) inserting into the double stranded DNA. The concentration of the probe DNA, EB and NaCl was optimized. Under the optimized conditions, the FRET system has a stable signal and good reproducibility. The linear range is 7.7-61.6 nM with the correlation coefficient of 0.998 and the limit of detection is 7.7 nM. This method is simple and sensitive, and makes the label-free DNA detection come true.
authors.affiliation: College of Pharmaceutical Science, Soochow University, Suzhou, PR China.
authors.forename: Ting
authors.initials: T
authors.lastname: Qiu
authors.forename: Bin
authors.initials: B
authors.lastname: Zhang
authors.forename: Zi-yang
authors.initials: ZY
authors.lastname: Hu
authors.forename: Jian-hua
authors.initials: JH
authors.lastname: Tang
authors.forename: Hong-ping
authors.initials: HP
authors.lastname: Xie
authors.forename: Bing-ren
authors.initials: BR
authors.lastname: Gu
mesh_terms: D019187:Cadmium Compounds / Q000737:chemistry*; D004247:DNA / Q000032:analysis*; D015342:DNA Probes / Q000737:chemistry / Q000378:metabolism; D004996:Ethidium / Q000737:chemistry; D031541:Fluorescence Resonance Energy Transfer; D011095:Polyethylenes / Q000737:chemistry; D045663:Quantum Dots; D000644:Quaternary Ammonium Compounds / Q000737:chemistry; D012965:Sodium Chloride / Q000737:chemistry; D013691:Tellurium / Q000737:chemistry*
chemical_list: D019187:Cadmium Compounds; D015342:DNA Probes; D011095:Polyethylenes; D000644:Quaternary Ammonium Compounds; C041004:poly-N,N-dimethyl-N,N-diallylammonium chloride; D012965:Sodium Chloride; D004247:DNA; D004996:Ethidium; D013691:Tellurium; C028337:cadmium telluride