1 Ocak 2022 Dergi makalesi Açık Erişim

Erkizan, Serena Nur; Idikut, Firat; Demirtas, Ozge; Goodarzi, Arian; Demir, Ahmet Kemal; Borra, Mona; Pavlov, Ihor; Bek, Alpan

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  "doi": "10.1002/adom.202200233", 
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    "creators": [
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        "affiliation": "Middle East Tech Univ, Phys Dept, TR-06800 Ankara, Turkey", 
        "name": "Erkizan, Serena Nur"
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      {
        "affiliation": "Middle East Tech Univ, Phys Dept, TR-06800 Ankara, Turkey", 
        "name": "Idikut, Firat"
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      {
        "affiliation": "Middle East Tech Univ, Micro & Nanotechnol Program, TR-06800 Ankara, Turkey", 
        "name": "Demirtas, Ozge"
      }, 
      {
        "affiliation": "Ctr Solar Energy Res & Applicat, ODTU GUNAM, TR-06800 Ankara, Turkey", 
        "name": "Goodarzi, Arian"
      }, 
      {
        "affiliation": "Bilkent Univ, Phys Dept, TR-06800 Ankara, Turkey", 
        "name": "Demir, Ahmet Kemal"
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      {
        "affiliation": "Ctr Solar Energy Res & Applicat, ODTU GUNAM, TR-06800 Ankara, Turkey", 
        "name": "Borra, Mona"
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      {
        "name": "Pavlov, Ihor"
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    "description": "A novel method of fabricating large-area, low-cost surface-enhanced Raman spectroscopy (SERS) substrates is introduced which yields densely nanostructured surfaces utilizing laser-induced periodic surface structuring (LIPSS) of crystalline silicon (Si). Two different interaction regimes yield low spatial frequency (LSFL) and high spatial frequency (HSFL) LIPSS patterns. Nanostructuring of Si surface is followed by deposition of a thin noble metal layer to complete the fabrication procedure. A 50-70 nm thick Ag layer is shown to maximize the SERS performance. The SERS effect is attributed to the electromagnetic field enhancement originating from the nanoscale surface roughness of Si that can be controlled by LSFL and HSFL nature of the structure. The SERS substrates are found to be capable of detecting a Raman analyte down to 10(-11) m. SERS performance of the Ag deposited substrates at 532, 660, and 785 nm excitation wavelengths is compared. Both LSFL and HSFL Si surfaces with 70 nm thick Ag are found to exhibit the strongest SERS under 660 nm excitation exhibiting Raman enhancement factors (EFs) as high as 10(9). The Raman EFs are calculated both by SERS spectra experimentally, and using finite-elements method simulation of the electric field enhancement where a good agreement is found.", 
    "doi": "10.1002/adom.202200233", 
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    "journal": {
      "issue": "22", 
      "title": "ADVANCED OPTICAL MATERIALS", 
      "volume": "10"
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    "publication_date": "2022-01-01", 
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    "science_branches": [
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    "title": "LIPSS for SERS: Metal Coated Direct Laser Written Periodic Nanostructures for Surface Enhanced Raman Spectroscopy"
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