Self‐Organized Growth of Catalyst‐Free Single Crystal WnO3n‐2 (n = 25) Nanowire Bundles on Si (111) via Selective He+ Ion Irradiation
Abstract Tungsten oxides (WOx) possess unique properties due to a synergy of multiple effects arising from their wide range of stoichiometric and sub‐stoichiometric compositions, defect chemistry, and polymorphism. Synthesis and incorporation of 1D WOx nano‐assemblies is an attractive pathway to ena...
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Wiley-VCH
2025-05-01
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| Series: | Advanced Materials Interfaces |
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| Online Access: | https://doi.org/10.1002/admi.202400907 |
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| author | Maryna Bilokur Matt Thompson Matthew Arnold Cormac Corr |
| author_facet | Maryna Bilokur Matt Thompson Matthew Arnold Cormac Corr |
| author_sort | Maryna Bilokur |
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| description | Abstract Tungsten oxides (WOx) possess unique properties due to a synergy of multiple effects arising from their wide range of stoichiometric and sub‐stoichiometric compositions, defect chemistry, and polymorphism. Synthesis and incorporation of 1D WOx nano‐assemblies is an attractive pathway to enable highly efficient next‐generation photocatalysts, sensors, and optoelectronic devices offering tunability over electro‐optical response in a wide range of the spectrum, from UV–vis to NIR. However, synthesis of the metal oxide nano‐patterns represents a technological challenge, often requiring the presence of a catalyst. Herein, a simple and economical method of synthesizing a catalyst‐free self‐organized sub‐stoichiometric WnO3n‐2 (n = 25) single crystal nanowire bundles by selectively irradiating a Mo‐Ni doped WOx surface with low‐energy He+ ions (27 eV) at 700 °C is reported. The synergetic effect of multiple factors including temperature, effective local electric field along the exposed area of the sample, and the micro‐gap between the mask and the WOx (Mo – Ni) film, suitable oxygen content, doping, as well as shielding the nanowire growth area from the direct He+ ion irradiation is suggested to drive the single‐crystal wire growth. Adjustment is also observed in the effective refractive index and extinction coefficient values in the synthesized WnO3n‐2 nanorods across the solar spectrum. |
| format | Article |
| id | doaj-art-db394a3cd2ff4c02b96d680a6b5b7039 |
| institution | OA Journals |
| issn | 2196-7350 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | Wiley-VCH |
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| series | Advanced Materials Interfaces |
| spelling | doaj-art-db394a3cd2ff4c02b96d680a6b5b70392025-08-20T01:53:37ZengWiley-VCHAdvanced Materials Interfaces2196-73502025-05-011210n/an/a10.1002/admi.202400907Self‐Organized Growth of Catalyst‐Free Single Crystal WnO3n‐2 (n = 25) Nanowire Bundles on Si (111) via Selective He+ Ion IrradiationMaryna Bilokur0Matt Thompson1Matthew Arnold2Cormac Corr3Department of Materials Physics Research School of Physics Australian National University Canberra ACT 2601 AustraliaDepartment of Materials Physics Research School of Physics Australian National University Canberra ACT 2601 AustraliaSchool of Mathematical and Physical Sciences University of Technology Sydney Sydney NSW 2007 AustraliaDepartment of Materials Physics Research School of Physics Australian National University Canberra ACT 2601 AustraliaAbstract Tungsten oxides (WOx) possess unique properties due to a synergy of multiple effects arising from their wide range of stoichiometric and sub‐stoichiometric compositions, defect chemistry, and polymorphism. Synthesis and incorporation of 1D WOx nano‐assemblies is an attractive pathway to enable highly efficient next‐generation photocatalysts, sensors, and optoelectronic devices offering tunability over electro‐optical response in a wide range of the spectrum, from UV–vis to NIR. However, synthesis of the metal oxide nano‐patterns represents a technological challenge, often requiring the presence of a catalyst. Herein, a simple and economical method of synthesizing a catalyst‐free self‐organized sub‐stoichiometric WnO3n‐2 (n = 25) single crystal nanowire bundles by selectively irradiating a Mo‐Ni doped WOx surface with low‐energy He+ ions (27 eV) at 700 °C is reported. The synergetic effect of multiple factors including temperature, effective local electric field along the exposed area of the sample, and the micro‐gap between the mask and the WOx (Mo – Ni) film, suitable oxygen content, doping, as well as shielding the nanowire growth area from the direct He+ ion irradiation is suggested to drive the single‐crystal wire growth. Adjustment is also observed in the effective refractive index and extinction coefficient values in the synthesized WnO3n‐2 nanorods across the solar spectrum.https://doi.org/10.1002/admi.202400907bundlescatalyst‐freehelium irradiationnanowiressub‐stoichiometrictungsten oxide |
| spellingShingle | Maryna Bilokur Matt Thompson Matthew Arnold Cormac Corr Self‐Organized Growth of Catalyst‐Free Single Crystal WnO3n‐2 (n = 25) Nanowire Bundles on Si (111) via Selective He+ Ion Irradiation Advanced Materials Interfaces bundles catalyst‐free helium irradiation nanowires sub‐stoichiometric tungsten oxide |
| title | Self‐Organized Growth of Catalyst‐Free Single Crystal WnO3n‐2 (n = 25) Nanowire Bundles on Si (111) via Selective He+ Ion Irradiation |
| title_full | Self‐Organized Growth of Catalyst‐Free Single Crystal WnO3n‐2 (n = 25) Nanowire Bundles on Si (111) via Selective He+ Ion Irradiation |
| title_fullStr | Self‐Organized Growth of Catalyst‐Free Single Crystal WnO3n‐2 (n = 25) Nanowire Bundles on Si (111) via Selective He+ Ion Irradiation |
| title_full_unstemmed | Self‐Organized Growth of Catalyst‐Free Single Crystal WnO3n‐2 (n = 25) Nanowire Bundles on Si (111) via Selective He+ Ion Irradiation |
| title_short | Self‐Organized Growth of Catalyst‐Free Single Crystal WnO3n‐2 (n = 25) Nanowire Bundles on Si (111) via Selective He+ Ion Irradiation |
| title_sort | self organized growth of catalyst free single crystal wno3n 2 n 25 nanowire bundles on si 111 via selective he ion irradiation |
| topic | bundles catalyst‐free helium irradiation nanowires sub‐stoichiometric tungsten oxide |
| url | https://doi.org/10.1002/admi.202400907 |
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