Název:	Functionalization of porous surfaces: New potential of laser ablation in liquids used for bio/photo catalytic nanomaterials
Autoři:	Křenek, Tomáš Vála, Lukáš Kovářík, Tomáš Forejtová, Jana Somr, Josef Stich, Theresia Docheva, Denitsa Pola, Michal Pola, Josef Jandová, Věra
Citace zdrojového dokumentu:	KUČEROVÁ, Ludmila ed.; JIRKOVÁ, Hana ed.; JENÍČEK, Štepán ed. Proceedings PING Junior 2021 - Modern Trends in Material Engineering 13–16 September 2022, Pilsen. 1. ed. Pilsen: University of West Bohemia, 2021, p. 16-17.. ISBN 978-80-261-1042-2 .
Datum vydání:	2021
Nakladatel:	University of West Bohemia
Typ dokumentu:	conferenceObject konferenční příspěvek
URI:	http://hdl.handle.net/11025/46338
Klíčová slova:	funkcionalizaci;laserová ablace v kapalinách;bioaktivita;fotokatalýza
Klíčová slova v dalším jazyce:	functionalization;laser ablation in liquids;bioactivity;photocatalysis
Abstrakt v dalším jazyce:	Laser ablation in liquids (LAL) has been developed into a simple and versatile technique producing various colloidal nanoparticles with novel properties and applications (e.g. biodetection, bioactive materials and photocatalysis). One of the typical problems faced in the bio/photo catalytic applications nanoparticles is their instability towards aggregation and the formation of larger particles, which change the catalytic properties and can even lead to inactive materials. A strong effort is therefore devoted to achieving a higher colloidal stability by various stabilizers or by suitable liquid media. However, the stabilizers are usually not environmentally friendly and freely moveable nanocatalysts can enter biogeochemical cycles and become harmful to the environment living organisms. It is therefore a novel and attractive idea to make use of the adsorption of nanoparticles on rough surfaces to bind these nanoparticles before they agglomerate in the liquid phase. In this simple way, colloidal photo/bio catalytic nanoparticles could adhere on a porous carrier, functionalize its surface. This unexplored potential of LAL we have revealed for laser ablation of FeS in water and ethanol which produces FeS-derived colloidal nanoparticles that absorb onto immersed porous ceramic substrates and create solar-light photocatalytic surfaces. The laser induced process thus offers an easy and efficient way for the functionalization of porous surfaces by photocatalytic nanoparticles that avoids aggregation in the liquid phase. Moreover, LAL induced functionalization has been found as perspective technique also for enhancing of bioactivity of titanium porous/textured surfaces. The importance of the synergy between the two disciplines: (i) chemical reactions of bone growth stimulants under LAL conditions and (ii) the functionalization of laser-shaped micro/nanotopography of titanium surface with colloidal particles generated from targets of bone growth stimulants by laser ablation in selected liquids is examined. The LAL synthesis of bioconductive colloidal particles of CaTiO3, MgTiO3 and CaSi2 allowing productivity, zeta potential, size and dispersity control through selected irradiation parameters and different liquid medium. The structure and adhesion of the nanosols to titanium surface is assessed by IR, Raman and XP spectroscopy and SEM and TEM analyses. In vitro osseointegration activity of the functionalized surfaces are evaluated by examining the growth of Messenchymal Stem cells.
Práva:	© University of West Bohemia
Vyskytuje se v kolekcích:	Proceedings PING 2021: modern trends in material engineering Proceedings PING Junior 2021 - modern trends in material engineering

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