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dc.contributor.authorHegde, Chidananden_US
dc.contributor.authorLim, Joel Chin Huaten_US
dc.contributor.authorTeng, Tan Huien_US
dc.contributor.authorLiu, Daobinen_US
dc.contributor.authorKim, Young-Jinen_US
dc.contributor.authorYan, Qingyuen_US
dc.contributor.authorLi, Huaen_US
dc.identifier.citationHegde, C., Lim, J. C. H., Teng, T. H., Liu, D., Kim, Y., Yan, Q. & Li, H. (2022). In situ synthesis and microfabrication of high entropy alloy and oxide compounds by femtosecond laser direct writing under ambient conditions. Small, 18(39), 2203126-.
dc.description.abstractSynthesis and coating of multi-metal oxides (MMOs) and alloys on conductive substrates are indispensable to electrochemical applications, yet demand multiple, resource-intensive, and time-consuming processes. Herein, an alternative approach to the synthesis and coating of alloys and MMOs by femtosecond laser direct writing (FsLDW) is reported. A solution-based precursor ink is deposited and dried on the substrate and illuminated by a femtosecond laser. During the illumination, dried precursor ink is transformed to MMO/alloys and is simultaneously bonded to the substrate. The formulation of the alloy and MMO precursor ink for laser processing is universally applicable to a large family of oxides and alloys. The process is conducted at room temperature and in an open atmosphere. To demonstrate, a large family of 57 MMOs and alloys are synthesized from a group of 13 elements. As a proof of concept, Ni0.24 Co0.23 Cu0.24 Fe0.15 Cr0.14 high entropy alloy synthesized on stainless-steel foil by FsLDW is used for the oxygen evolution reaction, which achieves a current density of 10 mA cm-2 at a significantly low overpotential of 213 mV. Further, FsLDW can also achieve microfabrication of alloys/MMO with feature sizes down to 20 µm.en_US
dc.rights© 2022 Wiley-VCH GmbH. All rights reserved.en_US
dc.titleIn situ synthesis and microfabrication of high entropy alloy and oxide compounds by femtosecond laser direct writing under ambient conditionsen_US
dc.typeJournal Articleen
dc.contributor.schoolSchool of Mechanical and Aerospace Engineeringen_US
dc.contributor.schoolSchool of Materials Science and Engineeringen_US
dc.contributor.researchSingapore Centre for 3D Printingen_US
dc.subject.keywordsHigh Entropy Alloysen_US
dc.description.acknowledgementThe authors acknowledge funding received from the research collaboration agreement by Panasonic Factory Solutions Asia Pacific Pte. Ltd. (PFSAP) and Singapore Centre for 3D Printing (RCA-15/027). This work was also partially supported by the National Research Foundation of the Republic of Korea (NRF-2012R1A3A1050386 and NRF-2021R1A4A1031660), the Basic Research Program (NK224C) funded by the Korea Institute of Machinery and Materials (KIMM), and by the Korea Institute of Planning and Evaluation for Technology in Food, Agriculture, and Forestry (IPET) funded by the Ministry of Agriculture, Food and Rural Affairs (MAFRA) (321077-2).en_US
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