Dr. Mateusz Ficek Profile

Dr. Mateusz Ficek

Assistant Professor at Gdansk Univ of Technology

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Publications (8)

Proceedings Article | 18 April 2021 Presentation

Effect of pH on optical sensing with poly-L-lysine-modified nanodiamonds

Maciej Glowacki, Monika Janik, Mirosław Sawczak, Anna Wcislo, Pawel Niedzialkowski, Mateusz Ficek, Robert Bogdanowicz

Proceedings Volume 11772, 117720D (2021) https://doi.org/10.1117/12.2589306

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Nitrogen-vacancy (NV) centers are crystallographic defects which provide diamonds with unique physical properties. The centers are known for their intensive, time-stable fluorescence, and an electron spin, which exhibits long coherence time and may be manipulated using external stimuli. Nanodiamonds containing the NV centers are promising tools in biolabeling, biosensing, and drug delivery due to the aforementioned properties of the defects combined with a chemical inertness of a core and an easily functionalized surface of the diamond. Many biochemical reactions are pH-sensitive, therefore, in order to utilize the NV centers for monitoring of such processes, the pH-dependency of the properties of the nanodiamonds needs to be well-understood. Functionalization of the nanodiamonds’ surfaces with biological molecules undergoing pH-triggered changes of conformation, e.g. poly-L-lysine, could not only increase the particles’ biocompatibility and promote cell adhesion, but also possibly enhance pH-sensitivity. In the present study, an impact of pH on the fluorescence, a zeta potential, and a contact angle of the NV centers-containing nanodiamonds dispersed in liquid media is examined. The suspensions were made of commercially available, fluorescent diamond particles in an as-received, unmodified state, and after the poly-L-lysine had been attached to their surfaces via two different procedures – in aqueous, and anhydrous environment. Values of pH of dispersion media were specifically chosen to induce diverse conformation of the poly-L-lysine: from a fully relaxed conformation, through a state of being neither wholly extended, nor helical, to a complete α-helix conformation. The intensity of the photoluminescence emitted by the NV centers has been found to depend on the pH-triggered conformation of the poly-L-lysine attached to the surfaces of the nanodiamonds. The impact of the conformation of the poly-L-lysine on the electric charge of the nanoparticles has also been analyzed. This study confirms the potential of the nitrogen-vacancy centers for optical sensing of pH-triggered processes.

Proceedings Article | 26 April 2018 Paper

Nitrogen-doped diamond thin films: potential application in Fabry-Pérot interferometer

M. Kosowska, D. Majchrowicz, K. Sankaran, M. Ficek , M. Jędrzejewska-Szczerska, M. K. Haenen

Proceedings Volume 10716, 1071614 (2018) https://doi.org/10.1117/12.2314445

KEYWORDS: Diamond, Interferometers, Visibility, Reflectivity, Mirrors, Silicon, Thin films, Microwave radiation, Methane, Scanning electron microscopy

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Proceedings Article | 7 December 2017 Paper

Computed aided system for separation and classification of the abnormal erythrocytes in human blood

Michał Wąsowicz, Michał Grochowski, Marek Kulka, Agnieszka Mikołajczyk, Mateusz Ficek, Katarzyna Karpieńko, Maciej Cićkiewicz

Proceedings Volume 10592, 105920A (2017) https://doi.org/10.1117/12.2297218

KEYWORDS: Blood, Computing systems, Neural networks, Classification systems, Diamond, RGB color model, Image classification, Detection and tracking algorithms, Control systems, Evolutionary algorithms

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Proceedings Article | 1 September 2017 Paper

Preparation of fluorescent nanodiamond suspensions using bead-assisted ultrasonic disintegration

Maciej Głowacki, Mateusz Gardas, Mateusz Ficek, Mirosław Sawczak, Robert Bogdanowicz

Proceedings Volume 10455, 104550E (2017) https://doi.org/10.1117/12.2281681

KEYWORDS: Ultrasonics, Luminescence, Color centers

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Proceedings Article | 22 February 2017 Presentation + Paper

Low-coherence sensors with nanolayers for biomedical sensing

Mateusz Ficek, Daria Majchrowicz, Katarzyna Karpienko, Julia Milewska, Bartlomiej Dec, Pawel Wierzba, Przemyslaw Struk, Malgorzata Jedrzejewska-Szczerska

Proceedings Volume 10077, 100770E (2017) https://doi.org/10.1117/12.2250744

KEYWORDS: Sensors, Fiber optics sensors, Chemical vapor deposition, Biomedical optics, Fiber optics, Biosensing, Deposition processes, Diamond, Interferometers, Gold, Silver, Visibility, Mirrors, Thin films

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Proceedings Article | 26 September 2016 Paper

Diamond-based protective layer for optical biosensors

D. Majchrowicz, M. Ficek, T. Baran, M. Wąsowicz, P. Struk, M. Jędrzejewska-Szczerska

Proceedings Volume 9929, 99291J (2016) https://doi.org/10.1117/12.2240115

KEYWORDS: Diamond, Thin films, Optical biosensors, Blood, Chemical vapor deposition, Sensors, Microwave radiation, Plasma, Coating, Scanning electron microscopy

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Proceedings Article | 22 April 2016 Paper

Optoelectronic investigation of nanodiamond interactions with human blood

M. Ficek, M. Wróbel, M. Wasowicz, M. Jedrzejewska-Szczerska

Proceedings Volume 9721, 97210H (2016) https://doi.org/10.1117/12.2208443

KEYWORDS: Blood, Biomedical optics, Optoelectronics, Carbon, Nanomaterials, Sensors, Spectroscopy, Toxicity, In vitro testing, Particles, Neodymium, Oxygen, Microwave radiation, Absorption, Plasma, Medium wave

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Proceedings Article | 1 July 2015 Paper

Nanocrystalline diamond microelectrode on fused silica optical fibers for electrochemical and optical sensing

Robert Bogdanowicz, Michał Sobaszek, Mateusz Ficek, Marcin Gnyba, Jacek Ryl, Katarzyna Siuzdak, Mateusz Śmietana

Proceedings Volume 9655, 965519 (2015) https://doi.org/10.1117/12.2185154

KEYWORDS: Optical fibers, Diamond, Refractive index, Chemical vapor deposition, Electrodes, Silica, Optical sensing, Liquids, Boron, Raman spectroscopy

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Showing 5 of 8 publications

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