The journal Scientific Reports (Nature) places an article with the participation of UJI research staff as a 2018 hot paper



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## The journal Scientific Reports (Nature) places an article with the participation of UJI research staff as a 2018 hot paper

09/05/2019 |
SCP

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The journal *Scientific Reports* (Nature) has chosen the article "Towards the scale-up of the formation of nanoparticles on α-Ag2WO4 with bactericidal properties by femtosecond laser irradiation" as a 2018 hot paper in the field of materials science. The article has been published by an international research team with the participation of four researchers from the Universitat Jaume I.

In this article, researchers from the departments of Physics, Inorganic and Organic Chemistry and Physical and Analytical Chemistry at the Universitat Jaume I, the Functional Materials Development Centre of Brazil and the Technical University of Liberec (Czech Republic) explain the development of a new technique to obtain complex nanocomposites formed by metallic silver nanoparticles segregated in the semiconductor crystal of tungsten-silver mixed oxide. These nanoparticles improve 32 times the bactericidal performance of this compound.

During 2018, the journal published more than 700 articles in the field of materials science and the selected article received 1,042 visits. Richard White, editor-in-chief of *Scientific Reports,* notes in the letter sent to the head of the research team, CDMF director Elson Longo, that "being among the 100 most read articles is an extraordinary achievement because it indicates that your work has a great value for the research community.

The increasing use of semiconductors in everyday life has triggered the search for new materials, as well as the obtaining of more efficient synthesis methods with a wide range of technological applications, thus becoming a field of research at the frontier of basic and applied knowledge.

The interaction between the semiconductor and a laser radiation pulsed in femtoseconds (10-15 seconds) allows the segregation of metallic silver nanoparticles on the surface of the semiconductor. This mixed tungsten-silver oxide, as the researchers explain, "is highly bactericidal when applied to a colony of bacteria, about 32 times more effective than the materials used so far.

Thus, the interaction between semiconductor and pulsed laser radiation in femtoseconds (10-15 seconds) opens up possibilities for obtaining high-performance, easy-to-manufacture bactericidal compounds, since ultra-short laser irradiation can be easily integrated into the production process. Research has also revealed that laser-driven synthesis offers a rich variety of chemical species.

This research expands the fundamental understanding of the effects of laser-matter interaction while inspiring the efficient synthesis of nanocomposites. The research team works on the ability to adjust the effect induced by the laser by varying its power and irradiation time that could open a new field in the synthesis of novel materials with a wide range of applications in fields such as medicine or technology.

This work is the result of an international cooperation project within the framework of the Functional Materials Development Centre (CDMF) of the Federal University of São Carlos (UFSCar) of Brazil, researchers from the departments of Physics, Inorganic and Organic Chemistry, and Physical and Analytical Chemistry of the Universitat Jaume I and the Czech university of Liberec.

**Images**

Schematic representation of the experimental procedure and observed results

The UJI research group formed by Gladys Mínguez, Juan Andrés, Héctor Beltrán-Mir and Eloísa Cordoncillo

Towards the scale-up of the formation of nanoparticles on α-Ag2WO4 with bactericidal properties by femtosecond laser irradiation. *Scientific Reports*, volume 8 (2018) <http://www.nature.com/articles/s41598-018-19270-9>

Authors: Elson Longo, Edson R. Leite, Marcelo Assis and Regiane Oliveira (UFSCar); Carlos E. Vergani and Camila C. Foggi (FOAR-Unesp-Araraquara); Juan Andrés, Eloísa Cordoncillo, Héctor Beltrán-Mir and Gladys Mínguez (Universidad Jaume I -UJI); and Rafael Torres-Mendieta (University of Liberec Studentská - Liberec Czech Republic).

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