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Tunable dual-stimuli response of a microgel composite consisting of reduced graphene oxide nanoparticles and poly(N-isopropylacrylamide) hydrogel microspheres

Lu,N, Liu,J, Li,J, Zhang,Z, Weng,Y, Yuan,B, Yang,K and Ma,Y 2014, Tunable dual-stimuli response of a microgel composite consisting of reduced graphene oxide nanoparticles and poly(N-isopropylacrylamide) hydrogel microspheres, Journal of materials chemistry B, vol. 2, no. 24, pp. 3791-3798, doi: 10.1039/c4tb00070f.

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Title Tunable dual-stimuli response of a microgel composite consisting of reduced graphene oxide nanoparticles and poly(N-isopropylacrylamide) hydrogel microspheres
Author(s) Lu,N
Liu,J
Li,JORCID iD for Li,J orcid.org/0000-0003-0709-2246
Zhang,Z
Weng,Y
Yuan,B
Yang,K
Ma,Y
Journal name Journal of materials chemistry B
Volume number 2
Issue number 24
Start page 3791
End page 3798
Total pages 8
Publisher Royal Society of Chemistry
Place of publication London, Eng.
Publication date 2014
ISSN 2050-7518
2050-750X
Summary A type of photo- and thermo-responsive composite microsphere composed of reduced graphene oxide nanoparticles and poly(N-isopropylacrylamide) (rGO@pNIPAM) is successfully fabricated by a facile solution mixing method. Due to the high optical absorbance and thermal conduction of rGO, the composite microspheres are endowed with the new property of photo-response, in addition to the intrinsic thermally sensitive property of pNIPAM. This new ability undoubtedly enlarges the scope of applications of the microgel spheres. Furthermore, through controlling the rGO content in the composite, the photo- and thermo-sensitivity of the composite can be effectively modulated. That is, with a lower rGO content (≤32% by weight), the composite microspheres perform only thermally induced changes, such as volume contraction (by ∼45% in diameter) and drug release, when crossing the lower critical solution temperature of pNIPAM. With a higher rGO content (∼47.5%), both temperature and light irradiation can trigger changes in the composite. However, when the rGO content is increased to around 64.5%, the thermo-responsivity of the composite disappears, and the spheres exhibit only photo-induced drug release. With a further increase in rGO content, the environmentally responsive ability of the microspheres vanishes. This journal is © the Partner Organisations 2014.
Language eng
DOI 10.1039/c4tb00070f
Field of Research 091205 Functional Materials
100708 Nanomaterials
091202 Composite and Hybrid Materials
Socio Economic Objective 970109 Expanding Knowledge in Engineering
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2014, Royal Society of Chemistry
Persistent URL http://hdl.handle.net/10536/DRO/DU:30072284

Document type: Journal Article
Collection: Institute for Frontier Materials
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