Nitrogen-vacancy nanodiamond based local thermometry using frequency-jump modulation

Abstract

A straightforward and sensitive approach is presented for contact-free thermal sensing with high spatial resolution based on optically detected magnetic resonance (ODMR) of negatively charged nitrogen-vacancy (NV) centers in fluorescent nanodiamonds (FNDs). The frequencyjump procedure is a frequency modulation technique between two discrete frequencies at the inflection points at both sides of the NV ODMR resonance, which yields a signal proportional to the temperature shift over a wide temperature range. The approach is generic and is demonstrated by time-dependent measurements of the local temperature at different spots on a microelectronics circuit under electrical switching operation of one of the devices.

Preparation and Applications of Carbon‐Based Fluorescent Nanothermometers

“…Nevertheless, as the temperature rises, the photoluminescence (PL) intensity of the most temperature‐sensitive carbon‐based materials changes, enabling temperature detection. [ 23–25,79–99 ] In general, the temperature‐response mechanism of carbon‐based fluorescent materials mainly consists of the change in surface states and molecular states, thermally activated nonradiative trapping, spectral shift, and broadening of the zero‐phonon line (ZPL). [ 5–18 ]…”

“…In recent years, fluorescent carbon‐based materials, represented by fluorescent NDs, fluorescent GQDs, fluorescent P‐dots, and fluorescent CDs, have been extensively investigated for the temperature measurement of cells and other living and nonliving organisms. [ 79–98 ] Based on the different fluorescence characteristics, the carbon‐based thermometers can be classified into two types: single‐wavelength fluorescent carbon‐based thermometers and dual‐wavelength fluorescent carbon‐based thermometers.…”

“…Fluorescent NDs as a thermometer show a good temperature measurement effect in a large temperature range and a small temperature change. [ 26,27,29–32,79–81 ] In 2013, Neumann et al. used 532 nm laser light excitation and fluorescence confocal microscopy collection methods to study the single NV center in bulk diamond and NDs.…”

“…They show the following advantages: high optical absorptivity, adjustable fluorescent emission, chemical stability, well biocompatibility, and low toxicity. [ 5–99 ] Given these superior properties, they have been extensively discussed in bioimaging devices, biosensors, catalysts, photovoltaic devices, as well as fluorescent nanothermometers for spatially resolved temperature ( Figure ). [ …”

Источники Двухволнового Узкополосного Излучения На Основе Алмазных Наночастиц С Введенными Одновременно Центрами Окраски Германий-Вакансия И Кремний-Вакансия

“…Такие флуоресцентные алмазные наночастицы перспективны для применения в качестве источников двухволнового узкополосного излучения в люминесцентной нанотермометрии. Алмазные наночастицы с оптическими центрами окраски представляют интерес для создания наноразмерных оптических сенсоров с целью измерения локальных изменений температуры на клеточном уровне в биологических тканях [1][2][3][4][5][6]. Это обусловлено уникальными свойствами наноалмазов: биосовместимостью, химической стойкостью, возможностью проведения функционализации поверхности.…”