Exploring morphological diversity of Q-carbon structures through laser energy density variation

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F23%3A43927987" target="_blank" >RIV/60461373:22310/23:43927987 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/60461373:22320/23:43927987 RIV/60461373:22810/23:43927987

Výsledek na webu

<a href="https://doi.org/10.1016/j.diamond.2023.110511" target="_blank" >https://doi.org/10.1016/j.diamond.2023.110511</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.diamond.2023.110511" target="_blank" >10.1016/j.diamond.2023.110511</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Exploring morphological diversity of Q-carbon structures through laser energy density variation

Popis výsledku v původním jazyce

This article presents a study on preparing and characterising Q-carbon structures through ultrafast cooling of annealed amorphous carbon using a nanosecond KrF excimer laser. The experiments were conducted under high vacuum conditions. Different Q-carbon structures resembling fibers, clusters, microdots, and combinations of clusters with nanodots were successfully prepared by varying the beam energy density (ranging from 0.6 to 1.8 J cm−2) during the pulsed laser annealing process. The resulting changes in surface morphology were analysed using atomic force microscopy (AFM) and scanning electron microscopy (SEM). Additionally, the modified forms of carbon were investigated through energy-dispersive spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS), and Raman spectroscopy. The findings reveal that increasing the beam energy density during the pulsed laser annealing process led to a corresponding increase in the percentage of sp3 hybridisation in the samples. The highest sp3 content, reaching 83 %, was observed in the sample with the highest energy value of 1.8 J cm−2, where the fastest undercooling occurred. In addition, we evaluated the antibacterial potential of the prepared sample (1.0 J) using two bacterial strains, one gram-positive of S. aureus and one gram-negative of E. coli. © 2023 Elsevier B.V.

Název v anglickém jazyce

Exploring morphological diversity of Q-carbon structures through laser energy density variation

Popis výsledku anglicky

This article presents a study on preparing and characterising Q-carbon structures through ultrafast cooling of annealed amorphous carbon using a nanosecond KrF excimer laser. The experiments were conducted under high vacuum conditions. Different Q-carbon structures resembling fibers, clusters, microdots, and combinations of clusters with nanodots were successfully prepared by varying the beam energy density (ranging from 0.6 to 1.8 J cm−2) during the pulsed laser annealing process. The resulting changes in surface morphology were analysed using atomic force microscopy (AFM) and scanning electron microscopy (SEM). Additionally, the modified forms of carbon were investigated through energy-dispersive spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS), and Raman spectroscopy. The findings reveal that increasing the beam energy density during the pulsed laser annealing process led to a corresponding increase in the percentage of sp3 hybridisation in the samples. The highest sp3 content, reaching 83 %, was observed in the sample with the highest energy value of 1.8 J cm−2, where the fastest undercooling occurred. In addition, we evaluated the antibacterial potential of the prepared sample (1.0 J) using two bacterial strains, one gram-positive of S. aureus and one gram-negative of E. coli. © 2023 Elsevier B.V.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

<a href="/cs/project/GA20-02120S" target="_blank" >GA20-02120S: Q-uhlík, příprava unikátních uhlíkových nanostruktur</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2023

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

DIAMOND AND RELATED MATERIALS

ISSN

0925-9635

e-ISSN

1879-0062

Svazek periodika

140

Číslo periodika v rámci svazku

DEC 2023

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

10

Strana od-do

"110511/1"-10

Kód UT WoS článku

001096634900001

EID výsledku v databázi Scopus

2-s2.0-85174451286