Size-Controlled Synthesis, Characterization, and Stability of Dendrimer-Stabilized Silver Nanoparticles
Silver nanoparticles (AgNPs) continue to receive intense scientific and technological interest in the applications of optics, electronics, catalysis, sensing, and so forth. Synthesizing AgNPs with tunable sizes and desired stability is of great importance for their various applications. In this study, amine-terminated generation 5 poly(amidoamine) dendrimers (G5. NH2) were used as templates for the entrapped synthesis of AgNPs. Followed by complete acetylation of the dendrimer terminal amines, a series of dendrimer-stabilized silver nanoparticles (Ag DSNPs) were synthesized. The size of Ag DSNPs can be tuned by simply varying the molar ratio of Ag(Ⅰ) ions to G5. NH2 dendrimers. The formed Ag DSNPs with a size ranging from 8.8 to 23.2 nm and with a relatively narrow size distribution were characterized using nuclear magnetic resonance, UV-vis spectrometry, transmission electron microscopy, and ζ-potential measurements. We show that the size of Ag DSNPs increases with the increase of the Ag(Ⅰ) ion/dendrimer molar ratio, and the formed Ag DSNPs are stable not only in water, PBS buffer, and fetal calf serum but also at different pH conditions and temperatures. Such preparation of stable and size-controllable AgNPs may be extended for the preparation of other nanoparticles for various applications.
dendrimers Ag nanoparticles stability synthesis
LIU Hui GUO Rui CAO Xue-yan SHEN Ming-wu SHI Xiang-yang
College of Chemistry, Chemical Engineering and Biotechnolocjy, Donghua University, Shanghai, 201620, P. R. China
国际会议
2010 International Forum on Biomedical Textile Materials(2010国际纺织生物医用论坛)
上海
英文
207-210
2010-05-28（万方平台首次上网日期，不代表论文的发表时间）