کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
609033 | 880613 | 2010 | 5 صفحه PDF | دانلود رایگان |
Thermosensitive fluoroalkyl end-capped N-(1,1-dimethyl-3-oxobutyl)acrylamide – acryloylmorpholine cooligomer, which was prepared by the cooligomerization of fluoroalkanoyl peroxide with the corresponding monomers, was applied to the autoreduction of gold ions to afford the fluorinated cooligomeric nanocomposite-encapsulated gold nanoparticles under very mild conditions; although the corresponding non-fluorinated cooligomer was not able to afford the gold nanoparticles at all under similar conditions. These fluorinated cooligomeric nanocomposites exhibited a plasmon absorption band around 520 nm related to the formation of gold nanoparticles in their aqueous solutions. Interestingly, these fluorinated nanocomposite-encapsulated gold nanoparticles can exhibit the thermoswitchable sol–gel transition through the lower critical solution temperature (LCST)-triggered aggregation of the corresponding nanocomposites, and this sol–gel switching behavior is reversible during a heating and cooling cycle.
RF-(DOBAA)x-(ACMO)y-RF/Au nanocomposites were prepared by the autoreduction of gold ions in the presence of RF-(DOBAA)x-(ACMO)y-RF cooligomer; although the corresponding non-fluorinated cooligomer was not able to afford the gold nanoparticles at all. These fluorinated nanocomposites can exhibit the thermoswitchable sol–gel transition through the lower critical solution temperature (LCST)-triggered aggregation of the corresponding nanocomposites.Figure optionsDownload high-quality image (67 K)Download as PowerPoint slideResearch highlights
► Autoreduction of gold ions.
► Fluorinated cooligomer.
► Fluorinated cooligomeric gold nanocomposite.
► LCST-triggered sol-gel switching behavior.
Journal: Journal of Colloid and Interface Science - Volume 351, Issue 1, 1 November 2010, Pages 166–170