期刊
NANO LETTERS
卷 14, 期 6, 页码 3674-3682出版社
AMER CHEMICAL SOC
DOI: 10.1021/nl5015734
关键词
nanoplasmonics; catalysis; high index facets; surface-enhanced spectroscopy; nanoparticles; tunable plasmon resonances
类别
资金
- NSF CAREER Award [DMR-1253231]
- ASPIRE-I Track I Award from University of South Carolina Office of Vice President for Research
- University of South Carolina Startup Funds
- Robert A. Welch Foundation [C-1222]
- Cyberinfrastructure for Computational Research - NSF [CNS-0821727]
- Department of Education of Jiangsu Province of China
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [1253231] Funding Source: National Science Foundation
Noble metal nanoparticles have been of tremendous interest due to their intriguing size- and shape-dependent plasmonic and catalytic properties. Combining tunable plasmon resonances with superior catalytic activities on the same metallic nanoparticle, however, has long been challenging because nanoplasmonics and nanocatalysis typically require nanoparticles in two drastically different size regimes. Here, we demonstrate that creation of high-index facets on subwavelength metallic nanoparticles provides a unique approach to the integration of desired plasmonic and catalytic properties on the same nanoparticle. Through site-selective surface etching of metallic nanocuboids whose surfaces are dominated by low-index facets, we have controllably fabricated nanorice and nanodumbbell particles, which exhibit drastically enhanced catalytic activities arising from the catalytically active high-index facets abundant on the particle surfaces. The nanorice and nanodumbbell particles also possess appealing tunable plasmonic properties that allow us to gain quantitative insights into nanoparticle-catalyzed reactions with unprecedented sensitivity and detail through time-resolved plasmon-enhanced spectroscopic measurements.
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