期刊
ACS NANO
卷 14, 期 11, 页码 15786-15792出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.0c06846
关键词
colloids; self-assembly; Janus particles; DNA-coated; reconfigurable; transition
类别
资金
- Department of Energy (DOE) [DE-SC0007991]
- National Research Foundation of Korea (NRF) [2017M3A7B8065528]
- Materials Research Science and Engineering Centers program of the NSF [DMR1420073]
- National Research Foundation of Korea [NRF 2020R1I1A1A01072213]
- U.S. Department of Energy (DOE) [DE-SC0007991] Funding Source: U.S. Department of Energy (DOE)
- National Research Foundation of Korea [2020R1I1A1A01072213] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Coating colloidal particles with DNA provides one of the most versatile and powerful methods for controlling colloidal self-assembly. Previous studies have shown how combining DNA coatings with DNA strand displacement allows one to design phase transitions between different three-dimensional crystal structures. Here we show that by using DNA coatings with bifunctional colloidal Janus particles, we can realize reconfigurable thermally reversible transitions between one- and two-dimensional self-assembled colloidal structures. We introduce a colloidal system in which DNA-coated asymmetric Janus particles can reversibly switch their Janus balance in response to temperature, resulting in the reconfiguration of assembling structures between colloidal chains and bilayers. Each face of the Janus particles is coated with different self-complementary DNA strands. Toehold strand displacement is employed to selectively activate or deactivate the sticky ends on the smaller face, which enables Janus particles to selectively assemble through either the smaller or larger face. This strategy could be useful for constructing complex systems that could be reconfigured to assemble into different structures in different environments.
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