Self-limiting directional nanoparticle bonding governed by reaction stoichiometry

doi:10.1126/science.aba8653

GSTDTAP > 气候变化

DOI	10.1126/science.aba8653
	Self-limiting directional nanoparticle bonding governed by reaction stoichiometry
	Chenglin Yi; Hong Liu; Shaoyi Zhang; Yiqun Yang; Yan Zhang; Zhongyuan Lu; Eugenia Kumacheva; Zhihong Nie
	2020-09-11
发表期刊	Science
出版年	2020
英文摘要	Although many routes have been developed to link together colloidal particles into controlled superstructures from dimers all the way up to three-dimensional lattices, they generally depend on coating the nanoparticle surfaces in specific ways to control the way they link up. By contrast, Yi et al. developed a ligand chemistry such that, when two particles link together, it changes the electrostatic properties to limit subsequent bonding (see the Perspective by Gang). Particles are coated with complementary polymer strands that undergo an acid-base neutralization reaction. This bonding is controlled by the length of the flexible ligands, whereas the arrangement of the bonded particles is controlled by electrostatic repulsions, thus giving two parameters to tune the shape of the assemblies that form. Science , this issue p. [1369][1]; see also p. [1305][2] Nanoparticle clusters with molecular-like configurations are an emerging class of colloidal materials. Particles decorated with attractive surface patches acting as analogs of functional groups are used to assemble colloidal molecules (CMs); however, high-yield generation of patchy nanoparticles remains a challenge. We show that for nanoparticles capped with complementary reactive polymers, a stoichiometric reaction leads to reorganization of the uniform ligand shell and self-limiting nanoparticle bonding, whereas electrostatic repulsion between colloidal bonds governs CM symmetry. This mechanism enables high-yield CM generation and their programmable organization in hierarchical nanostructures. Our work bridges the gap between covalent bonding taking place at an atomic level and colloidal bonding occurring at the length scale two orders of magnitude larger and broadens the methods for nanomaterial fabrication. [1]: /lookup/doi/10.1126/science.aba8653 [2]: /lookup/doi/10.1126/science.abd8183
领域	气候变化 ; 资源环境
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文献类型	期刊论文
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/294100
专题	气候变化资源环境科学
推荐引用方式 GB/T 7714	Chenglin Yi,Hong Liu,Shaoyi Zhang,et al. Self-limiting directional nanoparticle bonding governed by reaction stoichiometry[J]. Science,2020.
APA	Chenglin Yi.,Hong Liu.,Shaoyi Zhang.,Yiqun Yang.,Yan Zhang.,...&Zhihong Nie.(2020).Self-limiting directional nanoparticle bonding governed by reaction stoichiometry.Science.
MLA	Chenglin Yi,et al."Self-limiting directional nanoparticle bonding governed by reaction stoichiometry".Science (2020).