Comparative properties of irradiated Al nanoparticles via vibrational spectroscopy and X-ray diffraction method

In this research work, the effects on the structural and optical properties of e-beam irradiated Al nanoparticles (Al-NPs) by three field sizes, [Formula: see text], [Formula: see text] and [Formula: see text] fluence were studied. As a result of systematic observations, it has been possible to study the effect of electron beam on X-ray diffraction (XRD), infrared (IR) spectroscopy and Raman band modifications and, consequently, on the crystal structure and atomic dynamics of Al-NPs. The XRD method determined that Al-NPs are combined with water molecules in the air to form aluminum hydroxide (Al(OH) 3 ) groups. The Al(OH) 3 formation was not observed in any of the samples irradiated with three different fluences, [Formula: see text], [Formula: see text] and [Formula: see text], respectively. Confirmation of these results was also shown in the method of IR spectroscopy. While 12 vibrational modes were observed in the non-irradiated samples, only the vibrational modes corresponding to Al–Al bonds were observed in [Formula: see text], [Formula: see text], and [Formula: see text] fluence irradiated samples. It was determined by the Raman spectroscopy method that a low concentration of Al(OH) 3 remains in the samples irradiated with [Formula: see text] fluence. Only [Formula: see text] and [Formula: see text] fluence irradiated samples were found to correspond to the XRD and IR spectra, and Raman vibrational modes corresponding to Al–Al bonds were observed. In addition, electron irradiation is a suitable technique to increase the optical properties of nanoparticles by controlling the size of the particles.

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