1 Ocak 2023 Dergi makalesi Açık Erişim

Sarcan, Fahrettin; Fairbairn, Nicola J.; Zotev, Panaiot; Severs-Millard, Toby; Gillard, Daniel J.; Wang, Xiaochen; Conran, Ben; Heuken, Michael; Erol, Ayse; Tartakovskii, Alexander I.; Krauss, Thomas F.; Hedley, Gordon J.; Wang, Yue

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      {
        "name": "Sarcan, Fahrettin"
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      {
        "affiliation": "Univ Glasgow, Sch Chem, Glasgow City G12 8QQ, Scotland", 
        "name": "Fairbairn, Nicola J."
      }, 
      {
        "affiliation": "Univ Sheffield, Dept Phys & Astron, Sheffield S3 7RH, England", 
        "name": "Zotev, Panaiot"
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      {
        "affiliation": "Univ Sheffield, Dept Phys & Astron, Sheffield S3 7RH, England", 
        "name": "Severs-Millard, Toby"
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      {
        "affiliation": "Univ Sheffield, Dept Phys & Astron, Sheffield S3 7RH, England", 
        "name": "Gillard, Daniel J."
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      {
        "affiliation": "AIXTRON Ltd, Buckingway Business Pk,Anderson Rd, Cambridge CB24 4FQ, England", 
        "name": "Wang, Xiaochen"
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      {
        "affiliation": "AIXTRON Ltd, Buckingway Business Pk,Anderson Rd, Cambridge CB24 4FQ, England", 
        "name": "Conran, Ben"
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      {
        "affiliation": "AIXTRON SE, Dornkaulstr, D-52134 Herzogenrath, Germany", 
        "name": "Heuken, Michael"
      }, 
      {
        "affiliation": "Istanbul Univ, Fac Sci, Dept Phys, TR-34134 Istanbul, Turkiye", 
        "name": "Erol, Ayse"
      }, 
      {
        "affiliation": "Univ Sheffield, Dept Phys & Astron, Sheffield S3 7RH, England", 
        "name": "Tartakovskii, Alexander I."
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      {
        "affiliation": "Univ York, Sch Phys Engn & Technol, Dept Phys, York YO1 05DD, England", 
        "name": "Krauss, Thomas F."
      }, 
      {
        "affiliation": "Univ Glasgow, Sch Chem, Glasgow City G12 8QQ, Scotland", 
        "name": "Hedley, Gordon J."
      }, 
      {
        "affiliation": "Univ York, Sch Phys Engn & Technol, Dept Phys, York YO1 05DD, England", 
        "name": "Wang, Yue"
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    ], 
    "description": "<p>Focused ion beam (FIB) is an effective tool for precise nanoscale fabrication. It has recently been employed to tailor defect engineering in functional nanomaterials such as two-dimensional transition metal dichalcogenides (TMDCs), providing desirable properties in TMDC-based optoelectronic devices. However, the damage caused by the FIB irradiation and milling process to these delicate, atomically thin materials, especially in extended areas beyond the FIB target, has not yet been fully characterised. Understanding the correlation between lateral ion beam effects and optical properties of 2D TMDCs is crucial in designing and fabricating high-performance optoelectronic devices. In this work, we investigate lateral damage in large-area monolayer WS2 caused by the gallium focused ion beam milling process. Three distinct zones away from the milling location are identified and characterised via steady-state photoluminescence (PL) and Raman spectroscopy. The emission in these three zones have different wavelengths and decay lifetimes. An unexpected bright ring-shaped emission around the milled location has also been revealed by time-resolved PL spectroscopy with high spatial resolution. Our findings open up new avenues for tailoring the optical properties of TMDCs by charge and defect engineering via focused ion beam lithography. Furthermore, our study provides evidence that while some localised damage is inevitable, distant destruction can be eliminated by reducing the ion beam current. It paves the way for the use of FIB to create nanostructures in 2D TMDCs, as well as the design and realisation of optoelectrical devices on a wafer scale.</p>", 
    "doi": "10.1038/s41699-023-00386-0", 
    "has_grant": false, 
    "journal": {
      "issue": "1", 
      "pages": "7", 
      "title": "NPJ 2D MATERIALS AND APPLICATIONS", 
      "volume": "7"
    }, 
    "license": {
      "id": "cc-by"
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    "publication_date": "2023-01-01", 
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      "title": "Dergi makalesi", 
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    "title": "Understanding the impact of heavy ions and tailoring the optical properties of large-area monolayer WS<sub>2</sub> using focused ion beam"
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