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Article

Carbon Dots with an Emission in the Near Infrared Produced from Organic Dyes in Porous Silica Microsphere Templates

1
Center of Information Optical Technologies, ITMO University, Kronverksky Pr. 49, 197101 Saint Petersburg, Russia
2
Chair of Physical Chemistry, TU Dresden, Zellescher Weg 19, 01069 Dresden, Germany
3
Centre for Physical Methods of Surface Investigation, Saint Petersburg State University, Universitetskaya emb. 7-9, 199034 Saint Petersburg, Russia
4
Laboratory of Amorphous Semiconductors, Ioffe Institute, 26 Politekhnicheskaya Str., 194021 Saint Petersburg, Russia
5
Centre for Functional Photonics (CFP), Department of Materials Science and Engineering, City University of Hong Kong, Hong Kong 999077, China
6
Shenzhen Research Institute, City University of Hong Kong, Shenzhen 518057, China
*
Author to whom correspondence should be addressed.
Academic Editor: Hideya Kawasaki
Nanomaterials 2022, 12(3), 543; https://doi.org/10.3390/nano12030543
Received: 5 January 2022 / Revised: 31 January 2022 / Accepted: 2 February 2022 / Published: 5 February 2022
(This article belongs to the Special Issue Luminescent Colloidal Nanocrystals)
Carbon dots (CDs) with an emission in the near infrared spectral region are attractive due to their promising applications in bio-related areas, while their fabrication still remains a challenging task. Herein, we developed a template-assisted method using porous silica microspheres for the formation of CDs with optical transitions in the near infrared. Two organic dyes, Rhodamine 6G and IR1061 with emission in the yellow and near infrared spectral regions, respectively, were used as precursors for CDs. Correlation of morphology and chemical composition with optical properties of obtained CDs revealed the origin of their emission, which is related to the CDs’ core optical transitions and dye-derivatives within CDs. By varying annealing temperature, different kinds of optical centers as derivatives of organic dyes are formed in the microsphere’s pores. The template-assisted method allows us to synthesize CDs with an emission peaked at 1085 nm and photoluminescence quantum yield of 0.2%, which is the highest value reported so far for CDs emitting at wavelengths longer than 1050 nm. View Full-Text
Keywords: carbon dots; template synthesis; silica microspheres; near infrared emission; organic dyes carbon dots; template synthesis; silica microspheres; near infrared emission; organic dyes
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MDPI and ACS Style

Stepanidenko, E.A.; Skurlov, I.D.; Khavlyuk, P.D.; Onishchuk, D.A.; Koroleva, A.V.; Zhizhin, E.V.; Arefina, I.A.; Kurdyukov, D.A.; Eurov, D.A.; Golubev, V.G.; Baranov, A.V.; Fedorov, A.V.; Ushakova, E.V.; Rogach, A.L. Carbon Dots with an Emission in the Near Infrared Produced from Organic Dyes in Porous Silica Microsphere Templates. Nanomaterials 2022, 12, 543. https://doi.org/10.3390/nano12030543

AMA Style

Stepanidenko EA, Skurlov ID, Khavlyuk PD, Onishchuk DA, Koroleva AV, Zhizhin EV, Arefina IA, Kurdyukov DA, Eurov DA, Golubev VG, Baranov AV, Fedorov AV, Ushakova EV, Rogach AL. Carbon Dots with an Emission in the Near Infrared Produced from Organic Dyes in Porous Silica Microsphere Templates. Nanomaterials. 2022; 12(3):543. https://doi.org/10.3390/nano12030543

Chicago/Turabian Style

Stepanidenko, Evgeniia A., Ivan D. Skurlov, Pavel D. Khavlyuk, Dmitry A. Onishchuk, Aleksandra V. Koroleva, Evgeniy V. Zhizhin, Irina A. Arefina, Dmitry A. Kurdyukov, Daniil A. Eurov, Valery G. Golubev, Alexander V. Baranov, Anatoly V. Fedorov, Elena V. Ushakova, and Andrey L. Rogach. 2022. "Carbon Dots with an Emission in the Near Infrared Produced from Organic Dyes in Porous Silica Microsphere Templates" Nanomaterials 12, no. 3: 543. https://doi.org/10.3390/nano12030543

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