Nanoscale Surface Analysis of High Entropy Alloy
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arXiv
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2026
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| author | Huang, Hsin-Hui Ryu, Meguya Nishijima, Yoshiaki Mu, Haoran Kumar, Mohit Le, Nguyen Hoai An Cernescu, Adrian Vongsvivut, Jitraporn Ang, Andrew Siao Ming Grineviciute, Lina Subrahmanyam, Challapalli Morikawa, Junko Juodkazis, Saulius |
| author_facet | Huang, Hsin-Hui Ryu, Meguya Nishijima, Yoshiaki Mu, Haoran Kumar, Mohit Le, Nguyen Hoai An Cernescu, Adrian Vongsvivut, Jitraporn Ang, Andrew Siao Ming Grineviciute, Lina Subrahmanyam, Challapalli Morikawa, Junko Juodkazis, Saulius |
| contents | Nanoscale surface analysis of 1 micrometer thick high entropy alloys (HEAs) was carried out using nano-IR for hyperspectral imaging and single point spectroscopy in the 700-1700 1/cm spectral range. Nano-IR is based on the detection of scattered light from an oscillating metal coated nano-tip in one of the arms of the Fourier transform infrared spectrometer and has a resolution defined by the tip radius of the probe, 20 nm, regardless of the excitation wavelength. HEA CuPdAgPtAu showed an absorption and reflection increase at 900-1100 1/cm band, which is consistent with Drude-Lorenz modeling of permittivity, however, could also signify oxide formation as tested by X-ray photoelectron spectroscopy of CuPdAgPtAu and CrFeCoNiCuMo. Realization of polarization analysis for nano-IR nano-spectroscopy in the plane perpendicular to the sample's surface is discussed and modeled. The currently available modality of surface analysis with the excitation-detection mode of the p-pol. antenna can be extended to full 3D analysis of the orientational dependencies of local absorbance and refractive index. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2603_26445 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Nanoscale Surface Analysis of High Entropy Alloy Huang, Hsin-Hui Ryu, Meguya Nishijima, Yoshiaki Mu, Haoran Kumar, Mohit Le, Nguyen Hoai An Cernescu, Adrian Vongsvivut, Jitraporn Ang, Andrew Siao Ming Grineviciute, Lina Subrahmanyam, Challapalli Morikawa, Junko Juodkazis, Saulius Optics Mesoscale and Nanoscale Physics Nanoscale surface analysis of 1 micrometer thick high entropy alloys (HEAs) was carried out using nano-IR for hyperspectral imaging and single point spectroscopy in the 700-1700 1/cm spectral range. Nano-IR is based on the detection of scattered light from an oscillating metal coated nano-tip in one of the arms of the Fourier transform infrared spectrometer and has a resolution defined by the tip radius of the probe, 20 nm, regardless of the excitation wavelength. HEA CuPdAgPtAu showed an absorption and reflection increase at 900-1100 1/cm band, which is consistent with Drude-Lorenz modeling of permittivity, however, could also signify oxide formation as tested by X-ray photoelectron spectroscopy of CuPdAgPtAu and CrFeCoNiCuMo. Realization of polarization analysis for nano-IR nano-spectroscopy in the plane perpendicular to the sample's surface is discussed and modeled. The currently available modality of surface analysis with the excitation-detection mode of the p-pol. antenna can be extended to full 3D analysis of the orientational dependencies of local absorbance and refractive index. |
| title | Nanoscale Surface Analysis of High Entropy Alloy |
| topic | Optics Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2603.26445 |