کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
594347 | 1453980 | 2012 | 6 صفحه PDF | دانلود رایگان |
Silver (Ag) nanoparticles loading temperature responsive hybrid microgels were readily prepared by in situ reduction of Ag+ ions coordinated into poly(N-isopropylacrylamide) microgels. The weight percentage content of the entrapped Ag nanoparticles measured by thermogravity analysis tops 25%, and their average particle sizes determined by transmission electron microscopy are within the range from 8 to 11 nm. The results obtained by X-ray diffraction exhibit that the Ag nanoparticles are of face-centered cubic single crystal structure. The particle sizes of the hybrid microgels decrease sharply with environmental temperature increasing from 30 to 35 °C, and their surface plasmon resonance absorption wavelengths are pronouncedly red-shifted within the same temperature range. The catalytic reactivity of the Ag nanoparticles loading hybrid microgels can be tunable with four stages of change versus temperature from 20 to 45 °C.
Monodisperse Ag nanoparticles/poly(N-isopropylacrylamide) hybrid microgels with temperature dependent surface plasmon resonance property and catalytic reactivity were prepared by in situ reduction of Ag+.Figure optionsDownload as PowerPoint slideHighlights
► Monodisperse Ag nanoparticles/poly(N-isopropylacrylamide) hybrid microgels were synthesized by in situ reduction of Ag+.
► The weight content of the Ag nanoparticles of face-centered cubic crystal structure within the microgels tops 25%.
► Their surface plasmon resonance property is temperature dependent.
► Their catalytic reactivity can be modulated by temperature.
Journal: Colloids and Surfaces A: Physicochemical and Engineering Aspects - Volume 393, 5 January 2012, Pages 105–110