Synthesis, Structure and Optical Properties of NiTi Shape Memory Thin Films

Abstract

NiTi Shape Memory Alloy (SMA) is now widely used in important applications due to its shape memory e®ect (SME) and biocompatibility. However, there is still a challenge to control the sizes and shapes of these nanoparticles. Here, we report on the use of pulsed laser deposition technique for the cultivation of NiTi nanoparticles on glass substrates. It discussed the impli cations of the case of the in°uence of depositing laser energy on the size of a grain of NiTi nanoparticle. The nominated e®ect on the optical properties of its thin-¯lm was also discussed. X-ray di®raction (XRD) analysis revealed that the ¯lms prepared at 800 mJ, 900 mJ and 1000 mJ were amorphous structures. The Atomic Force Microscopy (AFM) results con¯rmed that the thin ¯lms are made up of spherical particles that are evenly distributed (in terms of size). A blueshift in the bandgap was observed in the UV–Visible absorption spectra with increase in the depositing laser energy due to the quantum con¯nement e®ect of nanoparticle formation