Download file (4.79MB)
Download as zip (4.66MB)

コレクション

引用

説明:

This work presents results on laser-induced surface structuring of AlN ceramic and its application in Surface-Enhanced Raman Spectroscopy (SERS). The laser processing is performed by nanosecond pulses in air and vacuum. Depending on the processing conditions, different surface morphology can be obtained. The ablation process is realized by ceramic decomposition as the formation of an aluminium layer is detected. The efficiency of the fabricated structures as active substrates in SERS is estimated by the ability of the detection of ammonium nitrate (NH4NO3). It is conducted for Raman spectrometer systems that operate at wavelengths of 514 and 785 nm where the most common commercial systems work. The obtained structures contribute to enhancement of the Raman signal at both wavelengths, as the efficiency is higher for excitation at 514 nm. The limit of detection (LOD) of ammonium nitrate is estimated to be below the maximum allowed value in drinking water. The analysis of the obtained results was based on the calculations of the near field enhancement at different conditions based on Finite Difference Time Domain simulation and the extinction spectra calculations based on Generalized Mie scattering theory. The structures considered in these simulations were taken from the SEM images of the real samples. The oxidation issue of the ablated surface was studied by X-ray photoelectron spectroscopy. The presented results indicated that laser structuring of AlN ceramics is a way for fabrication of Al structures with specific near-field properties that can be used for the detection of substances with high social impact.

権利情報:

• Creative Commons BY Attribution 4.0 International
  

キーワード: laser surface structuring, aluminium nanostructures, SERS, detection of nitrates

刊行年月日: 2024-05-10

出版者: MDPI AG

掲載誌:

• Materials (ISSN: 19961944) vol. 17 issue. 10 2254

研究助成金:

• Bulgarian National Science Fund KP-06-H47/11

原稿種別: 出版者版 (Version of record)

MDR DOI:

公開URL: https://doi.org/10.3390/ma17102254

関連資料:

その他の識別子:

連絡先:

更新時刻: 2024-12-18 08:30:51 +0900

MDRでの公開時刻: 2024-12-18 08:30:51 +0900