Isothermal and non-isothermal comparative study of Zn-sn system using real-time RBS

dc.contributor.advisorKotsedi, Lebogang
dc.contributor.authorMnguni, Mmangaliso Mpilonde
dc.date.accessioned2022-03-22T11:01:28Z
dc.date.accessioned2024-05-09T10:51:15Z
dc.date.available2022-03-22T11:01:28Z
dc.date.available2024-05-09T10:51:15Z
dc.date.issued2021
dc.description>Magister Scientiae - MScen_US
dc.description.abstractSolid-state reactions of bi-metallic systems can be driven or activated by various external stimuli like pressure, energetic photons, energetic charged particles or heat. For an example, high pressure torsion can be applied to aluminium-copper (Al-Cu) to drive solid-state reaction [1.1]. Oh-ishi et al. [1.1] applied a pressure of 6 GPa to Al and Cu half discs. Following this, x-ray diffraction (XRD) and high-resolution transmission electron microscope (HRTEM) were used to confirm the formation of different intermetallic phases such as Al2Cu and Al4Cu9. One of the first reported case where photons were used to drive solid phase diffusion was reported in 1998 by Ditchfield et al. [1.2]. The study was carried out to study the non-thermal effects of photons illumination on surface diffusion, an important process in microelectronics fabrication. Surface diffusion governs several important steps in microelectronics fabrication including the formation of hemispherical grained silicon used in memory devices [1.2], filling of channels with metals for devices interconnection purposes among others [1.2]. In this study, germanium-indium (Ge-In) on silicon was used because the thermal diffusion of this system was well understood [1.3]. Surface diffusion was measured in ultrahigh vacuum via second harmonic microscopy when the sample was illuminated with pulsed Nd: YAG laser at a wavelength of 1064 nm [1.3]. This study showed conclusively that photons could be used to drive solid-state reactions.en_US
dc.identifier.urihttps://hdl.handle.net/10566/14590
dc.language.isoenen_US
dc.rights.holderUniversity of the Western Capeen_US
dc.subjectAtomic force microscopyen_US
dc.subjectDiffusionen_US
dc.subjectFemtosecond laseren_US
dc.titleIsothermal and non-isothermal comparative study of Zn-sn system using real-time RBSen_US

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