Dos autores Alexandre Candido Teixeira, Natan Felipe Netzlaff Fachini, Henrique Kenzo Carvalho Kakinami e Danilo Mustafa
Publicado em ACS Omega | Special issue “Chemistry in Brazil: Advancing through Open Science” | Destaque da capa.
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Trabalho liderado pelo docente Danilo Mustafa (IFUSP) é destacado com uma das capas da publicação ACS Omega (Vol.10, #38, de 30/09/25).
Sobre a capa:
Memory effect arises as a post-synthetic strategy to both restore structural order and incorporate functional photoluminescent ligands as DBM into Eu3+-doped ZnAl LDHs. By enabling precise control over the Eu3+ coordination environment, this approach offers a powerful pathway for engineering hybrid LDHs for applications in optoelectronics, sensing, and photonic technologies.
Abstract:
Accurately quantifying the energy loss rate of proton beams in liquid water is crucial for the precise application and improvement of proton therapy, whereas the slowing down of protons in water ices also plays an important role in astrophysics. However, precisely determining the electronic stopping power, particularly for the liquid phase, has been elusive so far. Experimental techniques are difficult to apply to volatile liquids, and the availability of sufficient reliable measurements has been limited to the solid and vapor phases. The accuracy of current models is typically limited to proton energies just above the energy loss maximum, making it difficult to predict radiation effects at an energy range of special relevance. We elucidate the phase differences in proton energy loss in water in a wide energy range (0.001−10 MeV) by means of real-time time-dependent density functional theory combined with the Penn method. This nonperturbative model, more computationally efficient than current approaches, describes the phase effects in water in excellent agreement with available experimental data, revealing clear deviations around the maximum of the stopping power curve and below. As an important outcome, our calculations reveal that proton stopping quantities of liquid water and amorphous ice are identical, in agreement with recent similar observations for low-energy electrons, pointing out this equivalence for all charged particles. This could help to overcome the limitation in obtaining reliable experimental information for the biologically relevant liquid water target.
