Self-Organizing Sub-μm Surface Structures Stimulated by Microplasma Generated Reactive Species and Short-Pulsed Laser Irradiation.

Publisher: American Chemical Society Country of Publication: United States NLM ID: 101691658 Publication Model: eCollection Cited Medium: Internet ISSN: 2470-1343 (Electronic) Linking ISSN: 24701343 NLM ISO Abbreviation: ACS Omega Subsets: PubMed not MEDLINE

Original Publication: Washington, D.C. : American Chemical Society, [2016]-

Catalysts are critical components for chemical reactions in industrial applications. They are able to optimize selectivity, efficiency, and reaction rates, thus enabling more environmentally friendly processes. This work presents a novel approach to catalyst functionalization for the CO 2 reduction reaction by combining the reactive species of an atmospheric pressure plasma jet with the electric fields and energy input of a laser. This leads to both a nanoscale structuring as well as a controllable chemical composition of the surface, which are important parameters for optimizing catalyst performance. The treatment is conducted on thin copper layers deposited by high power pulsed magnetron sputtering on silicon wafers. Because atomic oxygen plays a key role in oxidizing copper, two photon absorption fluorescence is used to investigate the atomic oxygen density in the interaction zone of the COST plasma jet and a copper surface. The used atmospheric pressure plasma jet provides an atomic oxygen density at the surface in a distance of 8 mm to the jet nozzle of approximately or a flux of . Pulsed laser-induced dewetting is used to form nanoparticles from the deposited copper layer to enhance catalytic performance. Varying the layer thickness allows control of the size of the particles. A gas flow directed on the sample during the combined treatment disturbs the particle formation. This can be prevented by increasing the laser energy to compensate for the cooling effect of the gas flow. Investigating the surface using X-ray photoemission spectroscopy reveals that the untreated copper layer surface consists mostly of metallic copper and Cu(I) oxide. Irradiating the sample only with the laser did not change the composition. The combination of plasma and laser treatment is able to produce Cu(II) species such as CuO, whose concentration increases with treatment time. The presented process allows the tuning of the ratio of C 2 O/CuO, which is an interesting parameter for further studies on copper catalyst performance.
Competing Interests: The authors declare no competing financial interest.
(© 2024 The Authors. Published by American Chemical Society.)

Nat Mater. 2016 Dec 20;16(1):16-22. (PMID: 27994253)
Plasma Sources Sci Technol. 2020 Sep;29(9):095018. (PMID: 34149205)
Langmuir. 2010 Jul 20;26(14):11972-9. (PMID: 20578747)
Science. 2017 Jan 13;355(6321):. (PMID: 28082532)
J Phys Chem Lett. 2017 Jan 5;8(1):285-290. (PMID: 27983864)
Nat Chem. 2018 Sep;10(9):974-980. (PMID: 30013194)
J Am Chem Soc. 2014 May 14;136(19):6978-86. (PMID: 24746172)
J Am Chem Soc. 2019 Mar 20;141(11):4624-4633. (PMID: 30702874)
J Am Chem Soc. 2018 Jul 18;140(28):8681-8689. (PMID: 29913063)
Adv Mater. 2018 Apr;30(14):e1706194. (PMID: 29473227)
Adv Sci (Weinh). 2017 Sep 29;5(1):1700275. (PMID: 29375961)
J Am Chem Soc. 2020 Jul 1;142(26):11417-11427. (PMID: 32506908)
Nat Commun. 2016 Jun 30;7:12123. (PMID: 27356485)
Acc Chem Res. 2018 Nov 20;51(11):2906-2917. (PMID: 30335937)
Proc Natl Acad Sci U S A. 2015 Nov 10;112(45):E6111-8. (PMID: 26504215)
Nanotechnology. 2006 Aug 28;17(16):4229-34. (PMID: 21727564)
Nano Lett. 2011 Jun 8;11(6):2478-85. (PMID: 21553854)
ACS Nano. 2017 May 23;11(5):4825-4831. (PMID: 28441005)
Angew Chem Int Ed Engl. 2017 Oct 9;56(42):12919-12924. (PMID: 28834583)

Date Created: 20240715 Latest Revision: 20240716

20240716

PMC11238218

10.1021/acsomega.3c10033

39005795