Synthesis of Nanostructured PLD AlN Films: XRD and Surface-Enhanced Raman Scattering Studies

Title:Synthesis of Nanostructured PLD AlN Films: XRD and Surface-Enhanced Raman Scattering Studies

Volume: 6 Issue: 1

Author(s): Silvia Bakalova, Anna Szekeres, Zsolt Fogarassy, Stefan Georgiev, Tzvetan Ivanov, Gabriel Socol, Carmen Ristoscu and Ion N. Mihailescu

Affiliation:

Keywords: Aluminium nitride, microstructure, nanostructured thin film, pulsed laser deposition, Raman spectroscopy, Transmission electron microscopy, X-ray diffractometry.

Abstract: Thin films of AlN on Si were fabricated by pulsed laser deposition in vacuum and in nitrogen ambient, and at laser repetition rate of 3 Hz or 10 Hz. The films were nanostructured according to the X-ray diffraction analysis and TEM imaging. Films deposited in vacuum were polycrystalline with hexagonal AlN phase and with columnar structure, while films deposited in nitrogen were predominantly amorphous with nanocrystallites inclusions. The Al-N phonon modes in the surface-enhanced Raman spectra were largely shifted due to stress in the films. Phonon mode of Al-O related to film surface oxidation is observed only for deposition at low pressures.

Cite this article as:

Bakalova Silvia, Szekeres Anna, Fogarassy Zsolt, Georgiev Stefan, Ivanov Tzvetan, Socol Gabriel, Ristoscu Carmen and Mihailescu N. Ion, Synthesis of Nanostructured PLD AlN Films: XRD and Surface-Enhanced Raman Scattering Studies, Micro and Nanosystems 2014; 6 (1) . https://dx.doi.org/10.2174/187640290601140919122344