Quantum dots modified with quaternized poly(dimethylaminoethyl methacrylate) for selective recognition and killing of bacteria over mammalian cells.
Copper-free click chemistry has been used to graft quaternized poly(dimethylaminoethyl methacrylate) (QPA) modified with azide to the quantum dots (QDs) derived with dibenzocyclooctynes (DBCO). The success of the quaternary ammonium polymer-modified QDs was confirmed by ultraviolet-visible spectrophotometry (UV-Vis), fluorescence spectroscopy, zeta (ζ) potential, size distribution, and transmission electron microscopy (TEM). The QPA-modified QDs exhibited properties of selective recognition and killing of bacteria. The novelty of this study lies in fact that the synthesis method of the antimicrobial QPA-modified QDs is simple. Moreover, from another standpoint, QPA-modified QDs simultaneously possess abilities of selective recognition and killing of bacteria over mammalian cells, which is very different from the currently designed multifunctional antimicrobial systems composed of complicated systematic compositions.
College of Science, Northwest A&F University, Yangling, Shaanxi 712100, P. R. China. jywang@nwsuaf.edu.cn.
Qin
Q
Tu
College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi 712100, P. R. China.
Chao
C
Ma
College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi 712100, P. R. China.
Chang
C
Tian
College of Science, Northwest A&F University, Yangling, Shaanxi 712100, P. R. China. jywang@nwsuaf.edu.cn.
Maosen
M
Yuan
College of Science, Northwest A&F University, Yangling, Shaanxi 712100, P. R. China. jywang@nwsuaf.edu.cn.
Xiang
X
Han
College of Science, Northwest A&F University, Yangling, Shaanxi 712100, P. R. China. jywang@nwsuaf.edu.cn.
Dong-En
DE
Wang
College of Science, Northwest A&F University, Yangling, Shaanxi 712100, P. R. China. jywang@nwsuaf.edu.cn.
Chenyu
C
Cao
College of Science, Northwest A&F University, Yangling, Shaanxi 712100, P. R. China. jywang@nwsuaf.edu.cn and College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi 712100, P. R. China.
Jinyi
J
Wang
D000072283:A549 Cells; D001419:Bacteria / Q000187:drug effects*; D019187:Cadmium Compounds; D057930:Click Chemistry; D056945:Hep G2 Cells; D061307:Human Umbilical Vein Endothelial Cells; D006801:Humans; D008689:Methacrylates / Q000737:chemistry*; D045663:Quantum Dots; D000644:Quaternary Ammonium Compounds / Q000737:chemistry*; D013050:Spectrometry, Fluorescence
D019187:Cadmium Compounds; D008689:Methacrylates; D000644:Quaternary Ammonium Compounds