Photoluminescence, cathodoluminescence degradation and surface analysis of Gd2O3:Bi pulsed laser deposition thin films

Abdelrehman, M.H.M.; Kroon, R.E.; Coetsee, E.; Yousif, A.; Ahmed, H.; Swart, H.C.

doi:10.1016/j.physb.2021.413618

Cited by 4 publications

(1 citation statement)

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“…Among numerous luminescent materials proposed for use as temperature probes, semiconductor nanodots − and organic molecules are often selected but are unsuitable for use in TEM as the high-energy electron beam incident on the luminescent probes facilitates their rapid degradation. In contrast, oxide particles doped with rare-earth ions are stable in aggressive chemical media, at high temperatures, and under ionizing radiation, , rendering them promising candidates for use in in situ temperature measurements in TEM.…”

Section: Introductionmentioning

confidence: 99%

Nanoscale Cathodoluminescence Thermometry with a Lanthanide-Doped Heavy-Metal Oxide in Transmission Electron Microscopy

Park,

Olshin,

Kim

et al. 2024

ACS Nano

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When navigated by the available energy of a system, often provided in the form of heat, physical processes or chemical reactions fleet on a free-energy landscape, thus changing the structure. In in situ transmission electron microscopy (TEM), where material structures are measured and manipulated inside the microscope while being subjected to external stimuli such as electrical fields, laser irradiation, or mechanical stress, it is necessary to precisely determine the local temperature of the specimen to provide a comprehensive understanding of material behavior and to establish the relationship among energy, structure, and properties at the nanoscale. Here, we propose using cathodoluminescence (CL) spectroscopy in TEM for in situ measurement of the local temperature. Gadolinium oxide particles doped with emissive europium ions present an opportunity to utilize them as a temperature probe in CL measurements via a ratiometric approach. We show the thermometric performance of the probe and demonstrate a precision of ±5 K in the temperature range from 113 to 323 K with the spatial resolution limited by the size of the particles, which surpasses other methods for temperature determination. With the CL-based thermometry, we further demonstrate measuring local temperature under laser irradiation.

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