Hollow Thermoresponsive Microgels
- 25 February 2005
- Vol. 1 (4), 416-421
- https://doi.org/10.1002/smll.200400089
Abstract
Thermoresponsive poly(N-isopropyl acrylamide) (pNIPAm) microgels possessing a hollow structure have been synthesized from core–shell nanoparticles upon oxidation of the particle core, followed by removal of the produced polymer segments by centrifugation. N,N′-(1,2-dihydroxyethylene)bisacrylamide (DHEA) is used as a cross-linker for preparing the degradable core, whereas N,N′-methylenebis(acrylamide) (BIS) is used as a cross-linker to add a nondegradable pNIPAm shell. Addition of NaIO4 to a suspension of these particles in water leads to controlled degradation of the particle core by cleavage of the 1,2-glycol bond in DHEA. Fluorescence spectroscopy, UV/Vis spectroscopy, and photon correlation spectroscopy are used to characterize the hollow particles produced.This publication has 25 references indexed in Scilit:
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