Shape-Specific Patterning of Polymer-Functionalized Nanoparticles

被引:62
作者
Galati, Elizabeth [1 ]
Tebbe, Moritz [1 ]
Querejeta-Fernandez, Ana [1 ,9 ,10 ]
Xin, Huolin L. [2 ]
Gang, Oleg [2 ,3 ,4 ]
Zhulina, Ekaterina B. [5 ,6 ]
Kumacheva, Eugenia [1 ,7 ,8 ]
机构
[1] Univ Toronto, Dept Chem, Toronto, ON M5S 3H6, Canada
[2] Brookhaven Natl Lab, Ctr Funct Nanomat, Upton, NY 11973 USA
[3] Columbia Univ, Dept Chem Engn, New York, NY 10027 USA
[4] Columbia Univ, Dept Appl Phys & Appl Math, New York, NY 10027 USA
[5] Russian Acad Sci, Inst Macromol Cpds, St Petersburg 199004, Russia
[6] St Petersburg Natl Univ Informat Technol Mech & O, St Petersburg 197101, Russia
[7] Univ Toronto, Inst Biomat & Biomed Engn, Toronto, ON M5S 3G9, Canada
[8] Univ Toronto, Dept Chem Engn & Appl Chem, Toronto, ON M5S 3E5, Canada
[9] Univ Vigo, Dept Phys Chem, Biomed Res Ctr CINBIO, Vigo 36310, Spain
[10] Univ Vigo, Southern Galicia Inst Hlth Res IISGS, Vigo 36310, Spain
基金
俄罗斯基础研究基金会;
关键词
nanoparticles; nanocubes; surface patterning; surface curvature; pinned micelles; polymer patches; GOLD NANOPARTICLES; JANUS NANOPARTICLES; OPTICAL-PROPERTIES; PLASMON RESONANCE; LIGAND SHELL; CURVATURE; PARTICLES; NANOCUBES; NANORODS; BRUSHES;
D O I
10.1021/acsnano.7b01669
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Chemically and topographically patterned nano particles (NPs) with dimensions on the order of tens of nanometers have a diverse range of applications and are a valuable system for fundamental research. Recently, thermodynamically controlled segregation of a smooth layer of polymer ligands into pinned micelles (patches) offered an approach to nanopatterning of polymer-functionalized NPs. Control of the patch number, size, and spatial distribution on the surface of spherical NPs has been achieved, however, the role of NP shape remained elusive. In the present work, we report the role of NP shape, namely, the effect of the local surface curvature, on polymer segregation into surface patches. For polymer-functionalized metal nanocubes, we show experimentally and theoretically that the patches form preferentially on the high-curvature regions such as vertices and edges. An in situ transformation of the nanocubes into nanospheres leads to the change in the number and distribution of patches; a process that is dominated by the balance between the surface energy and the stretching energy of the polymer ligands. The experimental and theoretical results presented in this work are applicable to surface patterning of polymer-capped NPs with different shapes, thus enabling the exploration of patch-directed self-assembly, as colloidal surfactants, and as templates for the synthesis of hybrid nanomaterials.
引用
收藏
页码:4995 / 5002
页数:8
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