Surface structure of cleaved (001) USb<sub>2</sub>single crystal

High-energy radiation has been utilized for decades, however, the role of low-energy electrons created during irradiation has only recently begun to be appreciated Nuclear decay is one of the most extreme processes and is central to a range of fields including energy, medicine, imaging, labelling, archaeology and sensing. Radiation in the form of alpha particles, beta particles and gamma rays have fundamentally different interactions with matter and therefore exhibit different mean-free paths (∼1 μm, 1 mm and 1 cm, respectively). These forms of primary radiation deposit their energy over the course of their trajectory by ionizing their surroundings and producing non-thermal secondary electrons. Only very recently has the ability of low-energy secondary electrons to induce chemical reactions and biological damage begun to be appreciated 1 , because they have energies below the typical ionization threshold of organic matter. For example, low-energy electrons (3-20 eV) have been shown to be effective at causing DNA cleavage 2,4,7 . This ability stems from their high cross-section for breaking chemical bonds, and as a consequence they have a very short meanfree path of ∼1-10 nm in solution 8,9 . Furthermore, hot electrons that are not captured by surrounding molecules become thermalized as solvated electrons which are known to be chemically and biological active [9][10][11][12] . To harness these unique properties, the design of radioactive materials that increase and localize the flux of short-range lowenergy electrons to target sites is crucial for their application in targeted cancer therapies that minimize damage to healthy cells. Thus far, it has not been possible to design atomically precise radioactive materials that maximize these effects due to self-destruction arising from nuclear recoil, Coulomb explosion and self-irradiation [13][14][15][16] . We report a straightforward method for synthesizing monolayer films of radioactive 125 I atoms on gold-coated mica substrates under ambient conditions, and characterize their composition and their electron emission. Despite being synthesized from radioactive 125 I (> 99.9% purity) they are robust with respect to self-destruction, and provide well-defined, intense planar sources of secondary electrons. 125I decays by electron capture (EC) of a core shell electron to produce a nuclear excited state of 125 Te (Figure 1a), the majority of which eject another core

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Crossover behavior of the localized to itinerant transition of 5f electrons in the antiferromagnetic Kondo lattice USb2

Feng

Xie

Luo

et al. 2021

Phys. Rev. B

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Surface structure of cleaved (001) USb₂single crystal

Cited by 5 publications

References 22 publications

Anisotropic mechanical behavior and thermal attributes of antiferromagnetic UX2(X=P, As, Sb) materials: A density functional and elasticity theories study

Anisotropic mechanical behavior and thermal attributes of antiferromagnetic UX2(X=P, As, Sb) materials: A density functional and elasticity theories study

Enhancement of low-energy electron emission in 2D radioactive films

Crossover behavior of the localized to itinerant transition of 5f electrons in the antiferromagnetic Kondo lattice USb2

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Surface structure of cleaved (001) USb2single crystal

Cited by 5 publications

References 22 publications

Anisotropic mechanical behavior and thermal attributes of antiferromagnetic UX2(X=P, As, Sb) materials: A density functional and elasticity theories study

Anisotropic mechanical behavior and thermal attributes of antiferromagnetic UX2(X=P, As, Sb) materials: A density functional and elasticity theories study

Enhancement of low-energy electron emission in 2D radioactive films

Crossover behavior of the localized to itinerant transition of 5f electrons in the antiferromagnetic Kondo lattice USb2

Contact Info

Product

Resources

About

Surface structure of cleaved (001) USb₂single crystal