Characterization of Phase Change Materials on Silicon Nanostructure
#Photonics;
#Phase
#Change;
#Chalcogens
Chalcogens are elements in group 16 of the periodic table, while chalcogenides are a combination of chalcogens elements that exhibit phase-change properties. Phase change chalcogenides (PCCs) are materials that undergo reversible phase changes between amorphous and crystalline states with the application or removal of heat. My research focuses on the characterization of the phase change chalcogenides (Tellurium-Te, Selenium-Se, Germanium-Ge, Antimony-Sb) deposited on nanostructure, exploring potential applications in optical data storage and non-volatile memory while ensuring advanced thermal heat management systems. Silicon nanostructure has unique transfer properties, and integrating PCMs enhances the thermal management of the PCM. The research goal is to understand the interactions between PCMs and silicon nanostructures to improve thermal heat dissipation and the life cycle of the phase change from amorphous to crystalline without destroying the fundamental atomic structure.
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- Date: 14 Dec 2023
- Time: 12:00 PM to 01:00 PM
- All times are (UTC-05:00) Eastern Time (US & Canada)
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- Starts 28 November 2023 08:00 AM
- Ends 14 December 2023 10:00 AM
- All times are (UTC-05:00) Eastern Time (US & Canada)
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Speakers
Chinonso Ezeobi
Topic:
Characterization of Phase Change Materials on Silicon Nanostructure
Chalcogens are elements in group 16 of the periodic table, while chalcogenides are a combination of chalcogens elements that exhibit phase-change properties. Phase change chalcogenides (PCCs) are materials that undergo reversible phase changes between amorphous and crystalline states with the application or removal of heat. My research focuses on the characterization of the phase change chalcogenides (Tellurium-Te, Selenium-Se, Germanium-Ge, Antimony-Sb) deposited on nanostructure, exploring potential applications in optical data storage and non-volatile memory while ensuring advanced thermal heat management systems. Silicon nanostructure has unique transfer properties, and integrating PCMs enhances the thermal management of the PCM. The research goal is to understand the interactions between PCMs and silicon nanostructures to improve thermal heat dissipation and the life cycle of the phase change from amorphous to crystalline without destroying the fundamental atomic structure.
A modified reflected Z-scan nonlinear optical method was used to determine the lowest power requirement for the phase change. In the experiment, it was found that phase occurs at 1.25mW. A modified Z-scan is currently being used to investigate the life cycle, i.e., how many times it can transition from amorphous to crystalline and vice-verse without affecting the atomic structure that will lead to the valuable application of PCCNS.
The result revealed that PCNS had enhanced efficient heat dissipation and improved power efficiency. We just took delivery of new PCNS samples for the second phase of the research, that is, the life cycle experiment, to understand the durability of these novel PCNS materials. The target is a minimum of 100 transition cycles from amorphous to crystalline and back, with the PCNS structure intact.
Biography:
Chinonso Ezeobi is a Ph.D. student at the University of Maryland, Baltimore County (UMBC).
