Diamond nanocrystals with nitrogen-vacancy centers as new type temperature sensors

Abstract

Nitrogen vacancy color centers in diamond (NVs) as a new type of temperature sensors were presented in the article. Recent progress in the field of NV thermometry and summarize the techniques of NVs manufacturing was briefly discussed. The use of NVs for characterization of thermoelectric materials was proposed. KEYWORDS: nitrogen-vacancy, NV, thermometry, thermoelectrics, nanodiamondsW artykule zaprezentowano centra barwne azot-wakancja (NV) w diamentach w roli czujnika temperatury nowego typu. Krótko omówiono ostatnie doniesienia naukowe oraz podsumowano techniki wytwarzania diamentów z centrami NV. Zaproponowano nowatorskie wykorzystanie centrów NV do badania materiałów termoelektrycznych SŁOWA KLUCZOWE: azot-wakancja, NV, termometria, termoelektryki, nanodiamenty Modern thermometryMany methods have been developed for measuring temperature. Among the most important challenges remaining in the thermometry field are high-sensitivity measurements with a sub-micrometer spatial resolution. The development of precise micro-/nanoscale temperature measurements is important in many research fields [1]. It might be very useful e.g. to track and control intracellular processes in biology/medicine [2], chemical reactions [1] and/or quality of the new materials (e.g. thermoelectrics or semiconductors). These issues motivate a demand for new sensors and drive the progress in the field. Examples of the new developments are scanning thermal microscopes [3], dispersed or scanned fluorescent nanoprobes [4,5], and Raman spectroscopes [6]. Despite many novel techniques, precise nanoscale temperature measurements have not been realized so far. The nitrogen-vacancy (NV) center in diamond is a promising candidate to fill this gap. Diamond with NV center as a temperature sensorDiamond crystals are known for high hardness and chemical inertness. Thanks to the superb thermal conductivity, diamond is also an ideal material to host a temperature sensor. In this paper the nitrogen-vacancy color centers are introduced [7]. These extraordinary objects are used as sensors in different fields, like quantum information processing [8], magnetometry [9], optical tracking [2] and thermometry [1]. The NV center may be incorporated into nanodiamonds (NDs) and serve as a thermometric sensor, which might be localized with a nanometer resolution [1]. Moreover, nanodiamonds are biocompatible and might be introduced and tracked within living cells [2]. The sensing is performed optically in an non-contact and non-destructive way. The sensitivity of such sensors could potentially reach 1 mK [10]. They can be used for temperature measurements up to about 600 K.The NV center consists of a substitutional-nitrogen atom and an adjacent lattice vacancy. The electronic structure of the center contains two triplet levels (spin equal to 1) split by 1.945 eV, which lie within the diamond electronic band gap. The optical excitation of the center with a green light results in a strong and stable red fluorescence [11] (see figure). In room-temperature the ground-stat...

Coupled charge and spin dynamics in high-density ensembles of nitrogen-vacancy centers in diamond

“…Nitrogen-vacancy (NV) centers in diamond have been explored in recent years for sensing applications (magnetic field, electric field, and temperature) [1][2][3][4][5][6][7], quantum information processing [8,9], and as a source of hyperpolarization of 13 C, 14 N nuclei [10][11][12], nitrogen donor spins [13] in diamond and also to the nuclei outside the diamond [14].…”

Aprisionamento óptico de micropartículas e desenvolvimento de potenciais ópticos dinâmicos

“…‡ O centro de nitrogênio-vacância consiste em um átomo de nitrogênio substitucional ao lado de uma vacância na rede cristalina do diamante. Quando excitada opticamente por um laser verde, a amostra fluoresce na região do vermelho (44,45), tornando possível sua detecção. § As UCNPs são observadas através da fluorescência, como os nanodiamantes com centros de nitrogênio-vacância.…”