Electrostatic Self-Assembly of Au Nanoparticles onto Thermosensitive Magnetic Core-Shell Microgels for Thermally Tunable and Magnetically Recyclable Catalysis | |
Department | 固体润滑国家重点实验室 |
Liu GQ(刘国强)1,2; Wang DA(王道爱)1; Zhou F(周峰)1; Liu WM(刘维民)1; Wang DA(王道爱); Zhou F(周峰) | |
2015 | |
Source Publication | Small |
ISSN | 1613-6810 |
Volume | 11Issue:23Pages:2807-2816 |
Abstract | A facile route to fabricate a nanocomposite of Fe3O4@poly[N-isopropylacrylamide (NIPAM)-co-2-(dimethylamino)ethyl methacrylate (DMAEMA)]@Au (Fe3O4@PND@Au) is developed for magnetically recyclable and thermally tunable catalysis. The negatively charged Au nanoparticles with an average diameter of 10 nm are homogeneously loaded onto positively charged thermoresponsive magnetic core-shell microgels of Fe3O4@poly(NIPAM-co-DMAEMA) (Fe3O4@PND) through electrostatic self-assembly. This type of attachment offers perspectives for using charged polymeric shell on a broad variety of nanoparticles to immobilize the opposite-charged nanoparticles. The thermosensitive PND shell with swollen or collapsed properties can be as a retractable Au carrier, thereby tuning the aggregation or dispersion of Au nanoparticles, which leads to an increase or decrease of catalytic activity. Therefore, the catalytic activity of Fe3O4@PND@Au can be modulated by the volume transition of thermosensitive microgel shells. Importantly, the mode of tuning the aggregation or dispersion of Au nanoparticles using a thermosensitive carrier offers a novel strategy to adjust and control the catalytic activity, which is completely different with the traditional regulation mode of controlling the diffusion of reactants toward the catalytic Au core using the thermosensitive poly(N-isopropylacrylamide) network as a nanogate. Concurrent with the thermally tunable catalysis, the magnetic susceptibility of magnetic cores enables the Fe3O4@PND@Au nanocomposites to be capable of serving as smart nanoreactors for thermally tunable and magnetically recyclable catalysis. |
Subject Area | 材料科学与物理化学 |
DOI | 10.1002/smll.201403305 |
Funding Organization | NSFC (Grant Nos. 21125316;21204095;21434009);the “Hundred Talents Program” of Chinese Academy of Sciences |
Indexed By | SCI |
If | 8.368 |
Language | 英语 |
Funding Project | 材料表面与界面行为研究组 |
compositor | 第一作者单位 |
Citation statistics | |
Document Type | 期刊论文 |
Identifier | http://ir.licp.cn/handle/362003/18330 |
Collection | 固体润滑国家重点实验室(LSL) |
Corresponding Author | Wang DA(王道爱); Zhou F(周峰) |
Affiliation | 1.Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100039, Peoples R China |
Recommended Citation GB/T 7714 | Liu GQ,Wang DA,Zhou F,et al. Electrostatic Self-Assembly of Au Nanoparticles onto Thermosensitive Magnetic Core-Shell Microgels for Thermally Tunable and Magnetically Recyclable Catalysis[J]. Small,2015,11(23):2807-2816. |
APA | Liu GQ,Wang DA,Zhou F,Liu WM,王道爱,&周峰.(2015).Electrostatic Self-Assembly of Au Nanoparticles onto Thermosensitive Magnetic Core-Shell Microgels for Thermally Tunable and Magnetically Recyclable Catalysis.Small,11(23),2807-2816. |
MLA | Liu GQ,et al."Electrostatic Self-Assembly of Au Nanoparticles onto Thermosensitive Magnetic Core-Shell Microgels for Thermally Tunable and Magnetically Recyclable Catalysis".Small 11.23(2015):2807-2816. |
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Liu_et_al-2015-Small(2036KB) | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Application Full Text |
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