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Issue 7, 2017
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Time resolved spectroscopy of infrared emitting Ag2S nanocrystals for subcutaneous thermometry

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Abstract

We report a systematic investigation on the temperature dependence of fluorescence decay dynamics of infrared emitting colloidal Ag2S nanocrystals (NCs) with different surface coatings. The drastic lifetime reduction in the biological temperature range (20–50 °C) makes Ag2S NCs outstanding candidates for high sensitivity subcutaneous lifetime-based thermal sensing in the second biological window (1000–1400 nm). Indeed, the lifetime thermal sensitivity of Ag2S NCs has been found to be as large as 3–4% °C−1 at an operating wavelength of 1250 nm. Their application for lifetime-based luminescence nanothermometry has been demonstrated through simple ex vivo experiments specially designed to elucidate the magnitude of subcutaneous thermal gradients. Experimental data were found to be in excellent agreement with numerical simulations.

Graphical abstract: Time resolved spectroscopy of infrared emitting Ag2S nanocrystals for subcutaneous thermometry

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Publication details

The article was received on 01 Nov 2016, accepted on 09 Jan 2017 and first published on 11 Jan 2017


Article type: Paper
DOI: 10.1039/C6NR08534B
Citation: Nanoscale, 2017,9, 2505-2513
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    Time resolved spectroscopy of infrared emitting Ag2S nanocrystals for subcutaneous thermometry

    H. D. A. Santos, D. Ruiz, G. Lifante, C. Jacinto, B. H. Juarez and D. Jaque, Nanoscale, 2017, 9, 2505
    DOI: 10.1039/C6NR08534B

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