Hyperthermia plays a significant role in cancer treatment by inducing cell damage through temperature elevation, often used alongside other treatment modalities. During hyperthermia therapy, temperature control is crucial. Here, we report on a simple synthesis route of hybrid plasmonic nanodiamonds either completely wrapped with an Au shell () or densely covered with Au NPs ( ). Such integration of nanodiamonds with Au NPs is advantageous both for heating and precise thermometry at nanoscale. After structural and optical investigations, heating abilities of the obtained plasmonic nanodiamonds were thoroughly inspected on glass, in association with living cells, and in tissue slices , revealing their effective heat generation under excitation with light using a single excitation source. The developed hybrid plasmonic nanodiamonds were finally applied for local photothermal therapy of melanoma , demonstrating their efficacy in eradicating cancer cells and monitoring temperature during the process.
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http://dx.doi.org/10.1515/nanoph-2024-0285 | DOI Listing |
Nanophotonics
September 2024
School of Physics and Engineering, ITMO University, Lomonosova 9, 191002 St. Petersburg, Russia.
Nano Lett
October 2024
Center for Nano Optics, University of Southern Denmark, DK-5230 Odense M, Denmark.
Solid-state quantum emitters (QEs) with arbitrary direction emission and well-defined polarization are critical for scalable single-photon sources and quantum information processing. However, the design strategy for on-chip generation of off-normal photon emission with high-purity polarization characteristics has so far remained elusive. Here, we introduce the anisotropic holography metasurfaces for efficiently manipulating the emission direction and polarization of QE.
View Article and Find Full Text PDFNano Lett
September 2024
Materials Science and Engineering Program, University of California-Riverside, Riverside, California 92521, United States.
Adv Opt Mater
March 2023
Department of Mechanical Engineering, Johns Hopkins University, Baltimore, MD 21218, United States.
Nitrogen-vacancy (NV) centers in nanodiamond hold great promise for creating superior biological labels and quantum sensing methods. Yet, inefficient photon generation and extraction from excited NV centers restricts the achievable sensitivity and temporal resolution. Herein, we report an entirely complementary route featuring pyramidal hyperbolic metasurface to modify the spontaneous emission of NV centers.
View Article and Find Full Text PDFNat Commun
October 2023
Centre for Nano Optics, University of Southern Denmark, DK-5230, Odense M, Denmark.
Channelling single-photon emission in multiple well-defined directions and simultaneously controlling its polarization characteristics is highly desirable for numerous quantum technology applications. We show that this can be achieved by using quantum emitters (QEs) nonradiatively coupled to surface plasmon polaritons (SPPs), which are scattered into outgoing free-propagating waves by appropriately designed metasurfaces. The QE-coupled metasurface design is based on the scattering holography approach with radially diverging SPPs as reference waves.
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