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Toward Performance and Applications of Large Area Optical Thermometry Based on the Luminescence of Germanium‐Vacancy Defects in Diamond Nanocrystals
Author(s) -
Miller Caius,
Puust Laurits,
Ekimov Evgeny,
Vlasov Igor,
Vanetsev Alexander,
Vinogradova Elena,
Orlovskii Yurii,
Treshchalov Aleksei,
Sildos Ilmo
Publication year - 2021
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.202000217
Subject(s) - materials science , luminescence , germanium , anatase , diamond , nanocrystal , vacancy defect , substrate (aquarium) , optoelectronics , nanotechnology , colloid , chemical engineering , silicon , crystallography , chemistry , composite material , photocatalysis , engineering , biochemistry , oceanography , geology , catalysis
Herein optical properties of aggregates of hydrophobic nanodiamonds (NDs) with germanium‐vacancy (GeV) defects distributed on substrates with different hydrophilicities (bare Si or TiO 2 (anatase) film on Si substrate) are investigated with an aim to achieve millimeter‐scale, nearly homogeneous spatial distribution of ND aggregates. ND aggregates are spread by drop casting of a water colloid. The luminescence spectra of GeV defects are studied in a wide temperature range (85–400 K). The possibility of optical thermometry operating in a wide temperature range also covering biotemperatures is demonstrated using a separate microaggregate of NDs on the anatase film.