環状ポリマーによるナノ粒子の分散安定性の制御

目前的研究结果表明，在Tollens合成过程中，与线性聚乙二醇相比，环聚乙二醇（c-PEG）倾向于产生更小、分散更窄的AgNPs，而线性聚乙二醇在各种应用中都需要更小、分散更窄的金属纳米颗粒。此外，含有c-PEG的AgNPs虽然尺寸更小，但对NaCl的稳定性能更好。这些结果清楚地表明，与线性聚合物相比，环化聚合物赋予AgNPs更高的稳定性。通过使用c-PEG增强的胶体稳定性将使其在生物系统中的高耐盐性得以利用。证明了c-PEG对金属纳米粒子具有优异的分散稳定性。

The present research result shows that cyclic poly(ethylene glycol)(c-PEG) tends to yield smaller and narrowly dispersed AgNPs when employed during the Tollens synthesis in comparison with linear PEG, where smaller and narrowly dispersed metal nanoparticles are desired in various applications. Furthermore, the AgNPs with c-PEG exhibited superior stabilizing properties against NaCl despite the smaller size. These results clearly indicate the cyclized polymers endow AgNPs with the superior stability compared with the linear counterparts. The enhanced colloidal stability through the use of c-PEG would enable applications in biological systems where its high salt resistance can be exploited. It is proved that c-PEG exhibits superior dispersion stabilization to metal nanoparticles.