期刊
LANGMUIR
卷 36, 期 9, 页码 2403-2418出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.langmuir.9b03863
关键词
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资金
- Netherlands Organisation for Scientific Research (NWO) [700.58.025, 723.014.006]
- European Commission [7020005]
- Leverhulme Trust
- Newton Trust
- Engineering and Physical Sciences Research Council (EPSRC) UK [EP/L027151/1, EP/R020965/1]
- NanoDTC [EP/L015978/1]
- European Research Council under the European Unions Seventh Framework Programme/ERC [291667]
- Netherlands Center for Multiscale Catalytic Energy Conversion (MCEC), an NWO Gravitation programme
- Ministry of Education, Culture and Science of the government of The Netherlands
- EPSRC [EP/L027151/1, EP/R020965/1] Funding Source: UKRI
We report methods to synthesize sub-micron- and micron-sized patchy silica particles with fluorescently labeled hemispherical titania protrusions, as well as routes to efficiently characterize these particles and self-assemble these particles into non-close-packed structures. The synthesis methods expand upon earlier work in the literature, in which silica particles packed in a colloidal crystal were surface-patterned with a silane coupling agent. Here, hemispherical amorphous titania protrusions were successfully labeled with fluorescent dyes, allowing for imaging by confocal microscopy and super-resolution techniques. Confocal microscopy was exploited to experimentally determine the numbers of protrusions per particle over large numbers of particles for good statistical significance, and these distributions were compared to simulations predicting the number of patches as a function of core particle polydispersity and maximum separation between the particle surfaces. We self-assembled these patchy particles into open percolating gel networks by exploiting solvophobic attractions between the protrusions.
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