One-step synthesis of silver nanoparticles by sonication or heating using amphiphilic block copolymer as templates.
Block copolymer-supported Ag Nps (nanoparticles) have either a "cherry"-like or "raspberry"-like morphology [Antonietti, et al., Adv. Mater. 7 (1995) 1000-1005] depending on the amount of silver nitrate loading and the external conditions. Sonication favors silver nitrate and polyethyleneimine diffusion; the nucleation sites are well distributed in the micellar cores, so it is easy to form the cherry-like Ag NP colloids. However, when the amount of silver nitrate is decreased, it is heating that induces the formation of raspberry-like Ag NP colloids. The Ag NP colloids were investigated by transmission electron microscopy to demonstrate the nanosize dimensions and the location of the Ag NPs in the micelles. X-ray diffraction was employed to determine the crystal structure of the Ag NPs. UV-vis spectroscopy was employed for further qualitative characterization of the optical properties of Ag NPs.
Lei
Zhongli
Z
Key Laboratory of Applied Surface and Colloid Chemistry (Shaanxi Normal University), Ministry of Education, School of Chemistry and Materials Science, Xi'an 710062, People's Republic of China.
Zhang
Liang
L
Wei
Xiangyu
X
D003102:Colloids; D006361:Heating; D053768:Metal Nanoparticles / Q000737:chemistry*; D008823:Micelles; D053758:Nanoparticles; D011108:Polymers; D012834:Silver / Q000737:chemistry*; D013010:Sonication
D003102:Colloids; D008823:Micelles; D011108:Polymers; D012834:Silver