Publication

A Self-Assembled Organic/Metal Junction for Water Photo-Oxidation

Hubert Girault, Jonnathan Cesar Hidalgo Acosta, Natalia Gasilova, Astrid Johana Olaya Avendano, Victor Costa Bassetto, Julieta Soledad Riva
2019
Journal Articles

Abstract

We report the in situ self-assembly of TTF, TTF•+, and BF4 − or PF6 − into p-type semiconductors on the surface of Pt microparticles dispersed in water/acetonitrile mixtures. The visible light photoactivation of these selfassemblies leads to water oxidation forming O2 and H+, with an efficiency of 100% with respect to the initial concentration of TTF•+. TTF•+ is then completely reduced to TTF upon photoreduction with water. The Pt microparticles act as floating microelectrodes whose Fermi level is imposed by the different redox species in solution; here predominantly TTF, TTF•+, and HTTF+, which furthermore showed no signs of decomposition in solution.

Official source

https://infoscience.epfl.ch/entities/publication/3995bebb-04e3-48e6-b110-2c851bf03e34

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Hubert Girault, Jonnathan Cesar Hidalgo Acosta, Natalia Gasilova, Astrid Johana Olaya Avendano, Victor Costa Bassetto, Julieta Soledad Riva
2019
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/3995bebb-04e3-48e6-b110-2c851bf03e34

About this result

Ontological neighbourhood

Physics

Condensed matter physics: Solid-state physics

Related concepts (32)

Fermi level

The Fermi level of a solid-state body is the thermodynamic work required to add one electron to the body. It is a thermodynamic quantity usually denoted by μ or EF for brevity. The Fermi level does not include the work required to remove the electron from wherever it came from. A precise understanding of the Fermi level—how it relates to electronic band structure in determining electronic properties; how it relates to the voltage and flow of charge in an electronic circuit—is essential to an understanding of solid-state physics.

Doping (semiconductor)

In semiconductor production, doping is the intentional introduction of impurities into an intrinsic semiconductor for the purpose of modulating its electrical, optical and structural properties. The doped material is referred to as an extrinsic semiconductor. Small numbers of dopant atoms can change the ability of a semiconductor to conduct electricity. When on the order of one dopant atom is added per 100 million atoms, the doping is said to be low or light.

Semiconductor

A semiconductor is a material which has an electrical conductivity value falling between that of a conductor, such as copper, and an insulator, such as glass. Its resistivity falls as its temperature rises; metals behave in the opposite way. Its conducting properties may be altered in useful ways by introducing impurities ("doping") into the crystal structure. When two differently doped regions exist in the same crystal, a semiconductor junction is created.

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