Guang Pu Xue Yu Guang Pu Fen Xi
March 2013
Abstract Effects of metallic ions, such as Zn2+ , Mn , Cd2+, Na+, K+, Ag, CuZ+ and PbZ, on the photoluminescence properties of ZnS(ZINC sulfide) QDs (quantum dots)/poly (amido amine) (PAMAM) dendrimer nanocomposites(NCs) with blue emission under the irradiation of UV light were studied. The results show that the effects of different metallic ions on the photoluminescence properties of the prepared ZnS QDs were different. Zn+ , Mn2+ and Cd2+ ions enhance the PL(photoluminescence) intensity; Na+ and K+ ions don't change the PL intensity obviously while Ag+, Cu2+ and Pb2+ quench it.
View Article and Find Full Text PDFDuring 2009-2012, the Nam Dinh virus (NDiv) was detected from the samples of Culex pipiens quinquefasciatus in Shenzhen China. In this study, cell culture,SYBR Green I based real time RT-PCR and RT-PCR were performed to analyze the cell susceptibility and other biological characteristics of the NDiV isolates. The results showed that C6/36 cell line was susceptible to four isolates of Culex pipiens quinquefasciatus.
View Article and Find Full Text PDFGuang Pu Xue Yu Guang Pu Fen Xi
May 2012
Stable PAMAM (polyamidoamine) capped ZnS (zinc sulfide) QDs (quantum dots) were prepared and characterized with UV-Vis spectrum and PL(photoluminescence) emission spectrum on the base of coordination of Zn2+ ions with PAMAM dendrimers. The results show that Zn2+ ions coordinated with N atoms of PAMAM ligand and the saturated coordinating time is about 6 h; PAMAM capped ZnS QDs emitted strong blue light under the irradiation of UV light at the wavelength of 365 nm, and the PL emission peak is at about 500 nm. Finally, the prepared PAMAM capped ZnS QDs were applied in the fluorescent labeling of latent fingerprints on tinfoils; Latent fingerprints emitting strong blue light and were successfully detected with good resolving rate.
View Article and Find Full Text PDFGuang Pu Xue Yu Guang Pu Fen Xi
December 2011
The photoluminescence property of CdS/PAMAM nanocomposites in water at different ratio of Cd2+ to PAMAM(r) was studied by fluorescence emission spectrum, and the according mechanism was explored. The results indicate that in the irradiation of UV light at the wavelength of 330 nm, two peaks were shown in the fluorescence emission spectrum of CdS/PAMAM nanocomposites. One peak was attributed to PAMAM dendrimers, and the another came from CdS QDs.
View Article and Find Full Text PDFGuang Pu Xue Yu Guang Pu Fen Xi
December 2008
A new method for the development of latent fingerprints by CdS/PAMAM nanocomposites was explored in the present research. Amidation reaction between terminal carboxylate groups of amino acids and terminal amino groups of PAMAM G4. 5 dendrimers was studied by FTIR spectrometry.
View Article and Find Full Text PDFUniform and well-dispersed photoluminescent semiconductor CdS (cadmium sulfide) QDs (quantum dots) were in situ prepared inside Generation 4.0-NH(2) PAMAM (polyamidoamine) dendrimers in methanol, methanol and water mixed solutions of volume ratio 1:9, respectively. The prepared solutions containing photoluminescent semiconductor CdS QDs were utilized for detection of cyanoacrylate ester fumed fingerprints on tinfoil.
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