BEGIN:VCALENDAR VERSION:2.0 PRODID:-//linuxsoftware.nz//NONSGML Joyous v1.4//EN BEGIN:VEVENT SUMMARY:Ion-implanted gallium oxide for small-field beam dosimetry DTSTART:20241011T103000Z DTEND:20241011T120000Z DTSTAMP:20260730T080239Z UID:e2c19f61-6b63-4701-b4af-d89c69143c05 SEQUENCE:2 CREATED:20241003T095818Z DESCRIPTION: Monoclinic -Ga₂O₃ has been attracting renewed interest du e to its compelling properties such as its wide bandgap (~4.8 eV at room t emperature) and high breakdown electric field (~8 MV/cm)\, which make it s uitable for multiple applications\, ranging from gas detectors to power el ectronics. In the case of optical applications\, because of its high trans parency\, many different optical centres may be exploited\, with emissions spanning the spectral region from the ultraviolet down to the near-infrar ed. For instance\, the Cr3+ red/nearinfrared emission in -Ga₂O₃ has be en studied for its potential for ionising radiation detection in the conte xt of optical in-vivo dosimetry. Moreover\, thanks to the (100) easy-cleav age plane\, it is possible to produce thin flakes by conventional mechanic al exfoliation approaches\, such as the scotch tape method\; in spite of b eing useful for fast prototyping\, these techniques lack reproducibility a nd control. Recently\, we developed an innovative process for the fabricat ion of single-crystalline -Ga₂O₃ microtubes and nanomembranes based on ion implantation. Additionally\, this process allows the tailoring of the ir opto-electrical properties in the same step\, thus contributing to its scalability for future industrial applications. In this context\, this pro ject aims at establishing a doping and strain engineering strategy to prod uce and to tune the properties of -Ga₂O₃ nanomembranes for application s in small-field beam dosimetry. The fundamental physical processes underl ying this innovative processing technology are currently under investigati on by applying a powerful combination of experimental material characteris ation and computational techniques\, including Rutherford Backscattering S pectrometry and X-ray Diffraction\, as well as Molecular Dynamics simulati ons. The produced membranes will then be used to develop radiation detecto rs\, to be tested and characterised as active and/or passive dosimeters fo r smallfield beam LAST-MODIFIED:20241003T131635Z LOCATION:Online URL:http://df.vps.tecnico.ulisboa.pt/pt/eventos/ion-implanted-gallium-oxid e-for-small-field-beam-dosimetry/ X-ALT-DESC;FMTTYPE=text/html:

Monoclinic -Ga₂O ₃ has been attracting renewed interest due to its compelling properties such as its wide bandgap (~4.8 eV at room temperature) and high breakdown electric field (~8 MV/cm)\, which make it suitable for multiple applicatio ns\, ranging from gas detectors to power electronics. In the case of optic al applications\, because of its high transparency\, many different optica l centres may be exploited\, with emissions spanning the spectral region f rom the ultraviolet down to the near-infrared.

For instance\, th e Cr3+ red/nearinfrared emission in -Ga₂O₃ has been studied for its po tential for ionising radiation detection in the context of optical in-vivo dosimetry. Moreover\, thanks to the (100) easy-cleavage plane\, it is pos sible to produce thin flakes by conventional mechanical exfoliation approa ches\, such as the scotch tape method\; in spite of being useful for fast prototyping\, these techniques lack reproducibility and control.

Recently\, we developed an innovative process for the fabrication of sing le-crystalline -Ga₂O₃ microtubes and nanomembranes based on ion implan tation. Additionally\, this process allows the tailoring of their opto-ele ctrical properties in the same step\, thus contributing to its scalability for future industrial applications. In this context\, this project aims a t establishing a doping and strain engineering strategy to produce and to tune the properties of -Ga₂O₃ nanomembranes for applications in small- field beam dosimetry.

The fundamental physical processes underly ing this innovative processing technology are currently under investigatio n by applying a powerful combination of experimental material characterisa tion and computational techniques\, including Rutherford Backscattering Sp ectrometry and X-ray Diffraction\, as well as Molecular Dynamics simulatio ns. The produced membranes will then be used to develop radiation detector s\, to be tested and characterised as active and/or passive dosimeters for smallfield beam

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