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A new approach to precise mapping of local temperature fields in submicrometer aqueous volumes.

ABSTRACT: Nanodiamonds hosting temperature-sensing centers constitute a closed thermodynamic system. Such a system prevents direct contact of the temperature sensors with the environment making it an ideal environmental insensitive nanosized thermometer. A new design of a nanodiamond thermometer, based on a 500-nm luminescent nanodiamond embedded into the inner channel of a glass submicron pipette is reported. All-optical detection of temperature, based on spectral changes of the emission of "silicon-vacancy" centers with temperature, is used. We demonstrate the applicability of the thermometric tool to the study of temperature distribution near a local heater, placed in an aqueous medium. The calculated and experimental values of temperatures are shown to coincide within measurement error at gradients up to 20 °C/μm. Until now, temperature measurements on the submicron scale at such high gradients have not been performed. The new thermometric tool opens up unique opportunities to answer the urgent paradigm-shifting questions of cell physiology thermodynamics.

SUBMITTER: Romshin AM

PROVIDER: S-EPMC8270900 | biostudies-literature | 2021 Jul

REPOSITORIES: biostudies-literature

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A new approach to precise mapping of local temperature fields in submicrometer aqueous volumes.

Romshin Alexey M AM Zeeb Vadim V Martyanov Artem K AK Kudryavtsev Oleg S OS Pasternak Dmitrii G DG Sedov Vadim S VS Ralchenko Victor G VG Sinogeykin Andrey G AG Vlasov Igor I II

Scientific reports 20210709 1

Nanodiamonds hosting temperature-sensing centers constitute a closed thermodynamic system. Such a system prevents direct contact of the temperature sensors with the environment making it an ideal environmental insensitive nanosized thermometer. A new design of a nanodiamond thermometer, based on a 500-nm luminescent nanodiamond embedded into the inner channel of a glass submicron pipette is reported. All-optical detection of temperature, based on spectral changes of the emission of "silicon-vaca ...[more]

PMID: 34244547

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A new approach to precise mapping of local temperature fields in submicrometer aqueous volumes.

Publications

A new approach to precise mapping of local temperature fields in submicrometer aqueous volumes.

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