Journal
JOURNAL OF PHYSICAL CHEMISTRY C
Volume 121, Issue 1, Pages 691-700Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpcc.6b10213
Keywords
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Funding
- Programma Operativo Nazionale Ricerca e Competitivita
- Project SOCIAL-NANO [PAC02L3-00087]
- MPNS COST Action Advances in Optofluidics: Integration of Optical Control and Photonics with Microfluidics [1205]
- Nano-spectroscopy [MP1302]
- Ohio Third Frontier Project Research Cluster on Surfaces in Advanced Materials (RC-SAM) at Case Western Reserve University
- Xunta de Galicia [EM2014/035]
- MINECO-Spain [CTM2014-58481-R]
- Fundacion Tatiana Perez de Guzman el Bueno
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We demonstrate optical trapping of plasmonic silica-gold mesocapsules and their use as local SERS probes in Raman tweezers. These novel hybrid dielectric-metal particles, designed for optoplasmonic applications, are mesoscopic porous silica shells embedding gold nanospheres in their inner wall. We observe a high trapping efficiency due to plasmon-enhanced optical trapping of the gold component Furthermore, we develop an accurate model of optical trapping of this hybrid system in the T-matrix: framework studying how the plasmon-enhanced optical forces scale with gold nanoparticle number in the mesocapsnle: The relevance of effective optical trapping in hollow plasmonic mesocapsules is twofold for detection, and delivery technologies: positioning :and activation processes. In fact, the presented system allows for the opportunity to drag and locate cargo mesocapsules embedded with specific molecules that can be activated and released in situ when a precise localization is required.
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