期刊
ACS NANO
卷 9, 期 3, 页码 2720-2728出版社
AMER CHEMICAL SOC
DOI: 10.1021/nn5065327
关键词
magnetic self-assembly; colloidal polymers; controlled sequencing; nanoparticles
类别
资金
- Excellence Initiative [DFG/GSC 266]
- Deutsche Forschungsgemeinschaft
- NSF [DMR-1310266]
- Harvard Materials Research Science and Engineering Center [DMR-0820484]
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [1310266] Funding Source: National Science Foundation
The assembly of nanoparticles into polymer-like architectures is challenging and usually requires highly defined colloidal building blocks. Here, we show that the broad size-distribution of a simple dispersion of magnetic nanocolloids can be exploited to obtain various polymer-like architectures. The particles are assembled under an external magnetic field and permanently linked by thermal sintering. The remarkable variety of polymer analogue architectures that arises from this simple process ranges from statistical and block copolymer-like sequencing to branched chains and networks. This library of architectures can be realized by controlling the sequencing of the particles and the junction points via a size-dependent self-assembly of the single building blocks.
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