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Nanomaterials
Volume 11
Issue 2
10.3390/nano11020401
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Article

Direct Femtosecond Laser Fabrication of Chemically Functionalized Ultra-Black Textures on Silicon for Sensing Applications

by
Yulia Borodaenko
1,2,
Stanislav Gurbatov
2,
Mikhail Tutov
1,3,
Alexey Zhizhchenko
2,
Sergei A. Kulinich
1,4,
Aleksandr Kuchmizhak
2,* and
Aleksandr Mironenko
3,*
1
Far Eastern Federal University, 690091 Vladivostok, Russia
2
Institute of Automation and Control Processes FEB RAS, 5 Radio St., 690041 Vladivostok, Russia
3
Institute of Chemistry FEB RAS, 159 Pr. 100-let Vladivostoka, 690022 Vladivostok, Russia
4
Research Institute of Science and Technology, Tokai University, Hiratsuka, Kanagawa 259-1292, Japan
*
Authors to whom correspondence should be addressed.
Nanomaterials 2021, 11(2), 401; https://doi.org/10.3390/nano11020401
Submission received: 29 December 2020 / Revised: 21 January 2021 / Accepted: 1 February 2021 / Published: 4 February 2021
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Abstract

Here, we present the single-step laser-assisted fabrication of anti-reflective hierarchical surface textures on silicon locally functionalized with a photoluminescent (PL) molecular nanolayer. Using femtosecond-laser ablation of commercial crystalline Si wafers placed under a layer of a solution containing rhodamine 6G (R6G) a triethoxysilyl derivative, we fabricated ordered arrays of microconical protrusions with self-organized nanoscale surface morphology. At the same time, the laser-induced temperature increase facilitated surface activation and local binding of the R6G derivative to the as-fabricated nanotextured surface. The produced dual-scale surface textures showed remarkable broadband (visible to near-IR) light-absorbing properties with an averaged reflectivity of around 1%, and the capping molecular nanolayer demonstrated a strongly enhanced PL yield. By performing a pH sensing test using the produced nanotextured substrate, we confirmed the retention of sensory properties of the molecules attached to the surface and validated the potential applicability of the high-performing liquid-assisted laser processing as a key technology for the development of innovative multifunctional sensing devices in which the textured substrate (e.g., ultra-black semiconductor) plays a dual role as a support and PL signal amplifier.
Keywords: femtosecond laser pulses; laser ablation in liquids; laser-induced periodic surface structures (LIPSS); surface functionalization; surface enhanced fluorescence (SEF); rhodamine 6G femtosecond laser pulses; laser ablation in liquids; laser-induced periodic surface structures (LIPSS); surface functionalization; surface enhanced fluorescence (SEF); rhodamine 6G

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MDPI and ACS Style

Borodaenko, Y.; Gurbatov, S.; Tutov, M.; Zhizhchenko, A.; Kulinich, S.A.; Kuchmizhak, A.; Mironenko, A. Direct Femtosecond Laser Fabrication of Chemically Functionalized Ultra-Black Textures on Silicon for Sensing Applications. Nanomaterials 2021, 11, 401. https://doi.org/10.3390/nano11020401

AMA Style

Borodaenko Y, Gurbatov S, Tutov M, Zhizhchenko A, Kulinich SA, Kuchmizhak A, Mironenko A. Direct Femtosecond Laser Fabrication of Chemically Functionalized Ultra-Black Textures on Silicon for Sensing Applications. Nanomaterials. 2021; 11(2):401. https://doi.org/10.3390/nano11020401

Chicago/Turabian Style

Borodaenko, Yulia, Stanislav Gurbatov, Mikhail Tutov, Alexey Zhizhchenko, Sergei A. Kulinich, Aleksandr Kuchmizhak, and Aleksandr Mironenko. 2021. "Direct Femtosecond Laser Fabrication of Chemically Functionalized Ultra-Black Textures on Silicon for Sensing Applications" Nanomaterials 11, no. 2: 401. https://doi.org/10.3390/nano11020401

APA Style

Borodaenko, Y., Gurbatov, S., Tutov, M., Zhizhchenko, A., Kulinich, S. A., Kuchmizhak, A., & Mironenko, A. (2021). Direct Femtosecond Laser Fabrication of Chemically Functionalized Ultra-Black Textures on Silicon for Sensing Applications. Nanomaterials, 11(2), 401. https://doi.org/10.3390/nano11020401

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