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Article

The Luminescence of 1,8-Diazafluoren-9-One/Titanium Dioxide Composite Thin Films for Optical Application

by
Aneta Lewkowicz
1,*,
Robert Bogdanowicz
2,
Piotr Bojarski
1,
Mattia Pierpaoli
2,
Ignacy Gryczyński
3,
Anna Synak
1,
Michał Mońka
1,
Jakub Karczewski
4,
Wiktoria Struck-Lewicka
5,
Renata Wawrzyniak
5 and
Michał J. Markuszewski
5
1
Faculty of Mathematics, Physics and Informatics, University of Gdańsk, Wita Stwosza 57, 80-308 Gdańsk, Poland
2
Faculty of Electronics, Telecommunications and Informatics, Gdańsk University of Technology, 11/12 Gabriela Narutowicza Street, 80-233 Gdańsk, Poland
3
Faculty of Microbiology, Immunology and Genetics, Health Science Center, University of North Texas, 3500 Camp Bowie Boulevard, Fort Worth, TX 76107, USA
4
Faculty of Applied Physics, Gdańsk University of Technology 11/12 Gabriela Narutowicza Street, 80-233 Gdańsk, Poland
5
Department of Biopharmaceutics and Pharmacodynamics, Medical University of Gdańsk, Al. Gen. Hallera 107, 80-416 Gdańsk, Poland
*
Author to whom correspondence should be addressed.
Materials 2020, 13(13), 3014; https://doi.org/10.3390/ma13133014
Submission received: 28 May 2020 / Revised: 1 July 2020 / Accepted: 3 July 2020 / Published: 6 July 2020
(This article belongs to the Special Issue Hybrid and Composite Coatings and Thin Films)
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Abstract

The investigation of innovative label-free α-amino acids detection methods represents a crucial step for the early diagnosis of several diseases. While 1,8-diazafluoren-9-one (DFO) is known in forensic application because of the fluorescent products by reacting with the amino acids present in the papillary exudate, its application for diagnostic purposes has not been fully investigated. The stabilization of DFO over a transparent substrate allows its complexation with biomolecules for the detection of α-amino acids. In this study, DFO was immobilized into a titanium dioxide (TiO2) matrix for the fluorescence detection of glycine, as a target α-amino acid (a potential marker of the urogenital tract cancers). The DFO/TiO2 composite was characterized by atomic force microscopy, spectroscopic ellipsometry, fluorescence spectroscopy and fluorescence microscopy. The performed fluorescent studies indicate spectacular formation of aggregates at higher concentration. The measurements performed using various fluorescence and microscopic techniques together with the suitable analysis show that the aggregates are able to emit short-lived fluorescence.
Keywords: DFO; TiO2; thin films DFO; TiO2; thin films
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MDPI and ACS Style

Lewkowicz, A.; Bogdanowicz, R.; Bojarski, P.; Pierpaoli, M.; Gryczyński, I.; Synak, A.; Mońka, M.; Karczewski, J.; Struck-Lewicka, W.; Wawrzyniak, R.; et al. The Luminescence of 1,8-Diazafluoren-9-One/Titanium Dioxide Composite Thin Films for Optical Application. Materials 2020, 13, 3014. https://doi.org/10.3390/ma13133014

AMA Style

Lewkowicz A, Bogdanowicz R, Bojarski P, Pierpaoli M, Gryczyński I, Synak A, Mońka M, Karczewski J, Struck-Lewicka W, Wawrzyniak R, et al. The Luminescence of 1,8-Diazafluoren-9-One/Titanium Dioxide Composite Thin Films for Optical Application. Materials. 2020; 13(13):3014. https://doi.org/10.3390/ma13133014

Chicago/Turabian Style

Lewkowicz, Aneta, Robert Bogdanowicz, Piotr Bojarski, Mattia Pierpaoli, Ignacy Gryczyński, Anna Synak, Michał Mońka, Jakub Karczewski, Wiktoria Struck-Lewicka, Renata Wawrzyniak, and et al. 2020. "The Luminescence of 1,8-Diazafluoren-9-One/Titanium Dioxide Composite Thin Films for Optical Application" Materials 13, no. 13: 3014. https://doi.org/10.3390/ma13133014

APA Style

Lewkowicz, A., Bogdanowicz, R., Bojarski, P., Pierpaoli, M., Gryczyński, I., Synak, A., Mońka, M., Karczewski, J., Struck-Lewicka, W., Wawrzyniak, R., & Markuszewski, M. J. (2020). The Luminescence of 1,8-Diazafluoren-9-One/Titanium Dioxide Composite Thin Films for Optical Application. Materials, 13(13), 3014. https://doi.org/10.3390/ma13133014

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