title: Synthesis of polyethylenimine (PEI) functionalized silver nanoparticles by a hydrothermal method and their antibacterial activity study.
abstract: In this study, we report a facile, one-step hydrothermal method to synthesize PEI-functionalized Ag nanoparticles in which no extra reducing agent is needed and PEI serves as a reducing agent and a stabilizing agent. The obtained Ag colloids have been characterized by TEM, UV absorption spectra and laser particle size analyzer. We found that the size of Ag nanoparticles can be tuned through the alteration of the temperature and growth mode. Under an acidic condition, PEI-functionalized Ag nanoparticles are positively charged. More importantly, the Ag colloids exhibited stronger antibacterial activity in the bactericidal test. Its bactericidal efficiency exceeds the commonly used antibacterial agents such as Erythromycin, chloramphenicol and penicillin as well as AgNO3 solution. These results prove that our synthesis method is very efficient to produce a stable PEI-functionalized Ag colloid with excellent antibacterial activity.
authors: Key Laboratory of Forest Plant Ecology, Ministry of Education, Northeast Forestry University, Harbin 150040, People's Republic of China; Engineering Research Center of Forest Bio-preparation, Ministry of Education, Northeast Forestry University, Harbin 150040, People's Republic of China; State Engineering Laboratory of Bio-Resource Eco-Utilization, Harbin 150040, People's Republic of China. Electronic address: cn.zguoliu@yahoo.com.
authors: Zhiguo
authors: Z
authors: Liu
authors: Key Laboratory of Forest Plant Ecology, Ministry of Education, Northeast Forestry University, Harbin 150040, People's Republic of China; Engineering Research Center of Forest Bio-preparation, Ministry of Education, Northeast Forestry University, Harbin 150040, People's Republic of China; State Engineering Laboratory of Bio-Resource Eco-Utilization, Harbin 150040, People's Republic of China.
authors: Yuanlin
authors: Y
authors: Wang
authors: Key Laboratory of Forest Plant Ecology, Ministry of Education, Northeast Forestry University, Harbin 150040, People's Republic of China; Engineering Research Center of Forest Bio-preparation, Ministry of Education, Northeast Forestry University, Harbin 150040, People's Republic of China; State Engineering Laboratory of Bio-Resource Eco-Utilization, Harbin 150040, People's Republic of China.
authors: Yuangang
authors: Y
authors: Zu
authors: Key Laboratory of Forest Plant Ecology, Ministry of Education, Northeast Forestry University, Harbin 150040, People's Republic of China; Engineering Research Center of Forest Bio-preparation, Ministry of Education, Northeast Forestry University, Harbin 150040, People's Republic of China; State Engineering Laboratory of Bio-Resource Eco-Utilization, Harbin 150040, People's Republic of China.
authors: Yujie
authors: Y
authors: Fu
authors: Key Laboratory of Forest Plant Ecology, Ministry of Education, Northeast Forestry University, Harbin 150040, People's Republic of China; Engineering Research Center of Forest Bio-preparation, Ministry of Education, Northeast Forestry University, Harbin 150040, People's Republic of China; State Engineering Laboratory of Bio-Resource Eco-Utilization, Harbin 150040, People's Republic of China.
authors: Na
authors: N
authors: Li
authors: Key Laboratory of Forest Plant Ecology, Ministry of Education, Northeast Forestry University, Harbin 150040, People's Republic of China; Engineering Research Center of Forest Bio-preparation, Ministry of Education, Northeast Forestry University, Harbin 150040, People's Republic of China; State Engineering Laboratory of Bio-Resource Eco-Utilization, Harbin 150040, People's Republic of China.
authors: Na
authors: N
authors: Guo
authors: Key Laboratory of Forest Plant Ecology, Ministry of Education, Northeast Forestry University, Harbin 150040, People's Republic of China; Engineering Research Center of Forest Bio-preparation, Ministry of Education, Northeast Forestry University, Harbin 150040, People's Republic of China; State Engineering Laboratory of Bio-Resource Eco-Utilization, Harbin 150040, People's Republic of China.
authors: Ruisi
authors: R
authors: Liu
authors: Key Laboratory of Forest Plant Ecology, Ministry of Education, Northeast Forestry University, Harbin 150040, People's Republic of China; Engineering Research Center of Forest Bio-preparation, Ministry of Education, Northeast Forestry University, Harbin 150040, People's Republic of China; State Engineering Laboratory of Bio-Resource Eco-Utilization, Harbin 150040, People's Republic of China.
authors: Yiming
authors: Y
authors: Zhang
mesh_terms: D000900:Anti-Bacterial Agents / Q000737:chemistry* / Q000494:pharmacology; D001419:Bacteria / Q000187:drug effects*; D002175:Candida / Q000187:drug effects; D003102:Colloids / Q000737:chemistry / Q000494:pharmacology; D053768:Metal Nanoparticles / Q000737:chemistry*; D008826:Microbial Sensitivity Tests; D011094:Polyethyleneimine / Q000737:chemistry*; D012834:Silver / Q000737:chemistry* / Q000494:pharmacology
chemical_list: D000900:Anti-Bacterial Agents; D003102:Colloids; D012834:Silver; D011094:Polyethyleneimine
keywords: Ag nanoparticles; Antibacterial activity; Hydrothermal method; Polyethylenimine (PEI)