Hot plasmonic interactions: a new look at the photothermal efficacy of gold nanoparticles

Literature Information

Publication Date 2010-08-16
DOI 10.1039/C0CP00499E
Impact Factor 3.676
Authors

Ekaterina Y. Lukianova-Hleb, Lindsey J. E. Anderson, Seunghyun Lee


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Abstract

The photothermal (PT) outputs of individual gold nanoparticles (NP) were compared at room (cold) and high transient (hot) temperatures. High temperatures were induced in NPs by a single 0.5 ns laser pulse. All NPs with near-infrared plasmon resonances (rods, shells and bi-pyramids) exhibited a significant decrease in their photothermal output at the resonant wavelengths under high temperature, while non-resonant excitation of the same NPs provided several times higher PT efficacy of the hot NPs. This “inversion” of the PT efficacy of hot plasmonic NPs near their plasmon resonances might have been caused by damping of their resonances due to heating and surface melting. Therefore, photothermal output of plasmonic nanoparticles significantly depends upon their thermal state including the shift in excitation wavelength in hot nanoparticles. In particular, NPs with near-infrared resonances perform several times more efficiently at non-resonant excitation wavelengths rather than at the resonant ones.

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Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
CiteScore: 5.5
Self-citation Rate: 10.3%
Articles per Year: 3036

Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.

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