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Size Control and Enhanced Stability of Silver Nanoparticles by Cyclic Poly(ethylene glycol)

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Title: Size Control and Enhanced Stability of Silver Nanoparticles by Cyclic Poly(ethylene glycol)
Authors: Wang, Yubo Browse this author
Quinsaat, Jose Enrico Quijano Browse this author
Li, Feng Browse this author
Isono, Takuya Browse this author
Tajima, Kenji Browse this author →KAKEN DB
Satoh, Toshifumi Browse this author →KAKEN DB
Sato, Shin-ichiro Browse this author →KAKEN DB
Yamamoto, Takuya Browse this author →KAKEN DB
Keywords: polymer topology
size control
Issue Date: 26-Oct-2022
Publisher: MDPI
Journal Title: Polymers
Volume: 14
Issue: 21
Start Page: 4535
Publisher DOI: 10.3390/polym14214535
Abstract: Silver nanoparticles (AgNPs) are used in a wide range of applications, and the size control and stability of the nanoparticles are crucial aspects in their applications. In the present study, cyclized poly(ethylene glycol) (c-PEG) with various molecular weights, along with linear PEG with hydroxy chain ends (HO-PEG-OH) and methoxy chain ends (MeO-PEG-OMe) were applied for the Tollens' synthesis of AgNPs. The particle size was significantly affected by the topology and end groups of PEG. For example, the size determined by TEM was 40 +/- 7 nm for HO-PEG(5k)-OH, 21 +/- 4 nm for c-PEG(5k), and 48 +/- 9 nm for MeO-PEG(5k)-OMe when the molar ratio of PEG to AgNO3 (omega) was 44. The stability of AgNPs was also drastically improved by cyclization; the relative UV-Vis absorption intensity (A/A(0) x 100%) at lambda(max) to determine the proportion of persisting AgNPs in an aqueous NaCl solution (37.5 mM) was 58% for HO-PEG(5k)-OH, 80% for c-PEG(5k), and 40% for MeO-PEG(5k)-OMe, despite the fact that AgNPs with c-PEG(5k) were much smaller than those with HO-PEG(5k)-OH and MeO-PEG(5k)-OMe.
Type: article
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

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