期刊
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
卷 10, 期 13, 页码 3654-3660出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpclett.9b01165
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资金
- Natural Sciences and Engineering Council of Canada (NSERC)
- Canada Foundation for Innovation (CFI)
- University of Calgary
- NSERC for Alexander Graham Bell Post-Graduate Doctoral Scholarships
- Alberta Innovates for Doctoral Scholarships in Nanotechnologies
- NSERC through an Undergraduate Summer Research Award
- NSERC through Reactive Intermediate Student Exchange (RISE) program
In plasmon-enhanced singlet oxygen (O-1(2)) production, irradiation of a hybrid photosensitizer metal nanoparticle leads to a significant alteration of the photosensitizer's O-1(2) yield. The quest for a more rational design of these nanomaterials calls for a better understanding of the enhancement mechanism that, to this day, remains largely unexplored. Herein, we introduce a new methodology to distinguish the near- and far-field contributions to the plasmon-enhanced O-1(2) production using a tunable model nanoplatform, Rose Bengal-decorated silica coated metal nanoparticles. By correlating (1)O(2)production to the experimental and simulated optical properties of our nanoparticles, we effectively discriminate how the near- and far-field effects contribute to the plasmonic interactions. We show that these effects work in synergy; i.e., for nanoparticles with a similar local field, the production of O-1(2) correlates with maximized scattering yields. Our results expound the critical plasmonic aspects in terms of near and far fields for the design of an efficient hybrid plasmonic nanoparticle photosensitizer.
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