期刊
ACS NANO
卷 9, 期 6, 页码 5657-5665出版社
AMER CHEMICAL SOC
DOI: 10.1021/nn507331z
关键词
nanoparticle; DNA; cluster; quantum dots; fluorescence; self-assembly
类别
资金
- U.S. Department of Energy, Office of Basic Energy Sciences [DE-SC0012704]
- National Science Foundation of China [21306077]
We used DNA self-assembly methods to fabricate a series of core-shell gold nanoparticle-DNA-colloidal quantum dot (AuNP-DNA-Qdot) nanoclusters with satellite-like architecture to modulate optical (photoluminescence) response. By varying the intercomponent distance through the DNA linker length designs, we demonstrate precise tuning of the plasmon-exciton interaction and the optical behavior of the nanoclusters from regimes characterized by photoluminescence quenching to photoluminescence enhancement. The combination of detailed X-ray scattering probing with photoluminescence intensity and lifetime studies revealed the relation between the cluster structure and its optical output. Compared to conventional light-harvesting systems like conjugated polymers and multichromophoric dendrimers, the proposed nanoclusters bring enhanced flexibility in controlling the optical behavior toward a desired application, and they can be regarded as controllable optical switches via the optically pumped color.
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