Repository of University of Nova Gorica

Search the repository
A+ | A- | Help | SLO | ENG

Query: search in
search in
search in
search in
* old and bologna study programme

Options:
  Reset


1 - 10 / 16
First pagePrevious page12Next pageLast page
1.
The role of lattice defects on the optical properties of TiO[sub]2 nanotube arrays for synergistic water splitting
Manel Machreki, Takwa Chouki, Georgi Tyuliev, Mattia Fanetti, Matjaž Valant, Denis Arčon, Matej Pregelj, Saim Emin, 2023, original scientific article

Abstract: In this study, we report a facile one-step chemical method to synthesize reduced titanium dioxide (TiO2) nanotube arrays (NTAs) with point defects. Treatment with NaBH4 introduces oxygen vacancies (OVs) in the TiO2 lattice. Chemical analysis and optical studies indicate that the OV density can be significantly increased by changing reduction time treatment, leading to higher optical transmission of the TiO2 NTAs and retarded carrier recombination in the photoelectrochemical process. A cathodoluminescence (CL) study of reduced TiO2 (TiO2–x) NTAs revealed that OVs contribute significantly to the emission bands in the visible range. It was found that the TiO2 NTAs reduced for a longer duration exhibited a higher concentration of OVs. A typical CL spectrum of TiO2 was deconvoluted to four Gaussian components, assigned to F, F+, and Ti3+ centers.
Keywords: TiO2 nanotubes, defects, cathodoluminescence
Published in RUNG: 13.12.2023; Views: 331; Downloads: 7
.pdf Full text (5,75 MB)
This document has many files! More...

2.
3.
Unravelling the P[sub]3 centers origin in alkali phosphate glasses
Luigi Giacomazzi, Nikita S. Shcheblanov, Layla Martin-Samos, Matjaž Valant, Nadege Ollier, Nicolas Richard, 2021, published scientific conference contribution abstract

Keywords: EPR, DFT, NaPO3, LiPO3, alkali phosphate glasses, point defects
Published in RUNG: 29.09.2021; Views: 1795; Downloads: 7
URL Link to full text
This document has many files! More...

4.
Unravelling the P[sub]3 centers origin in alkali phosphate glasses
Luigi Giacomazzi, Nikita S. Shcheblanov, Layla Martin-Samos, Matjaž Valant, Nadege Ollier, Nicolas Richard, 2021, published scientific conference contribution abstract

Keywords: EPR, DFT, NaPO3, LiPO3, alkali phosphate glasses, point defects
Published in RUNG: 29.09.2021; Views: 1819; Downloads: 0
This document has many files! More...

5.
6.
Vers une connaissance microscopique de la structure de verres de phosphate P2O5
Nicolas Richard, Luigi Giacomazzi, Nikita S. Shcheblanov, Layla Martin-Samos, Nadege Ollier, 2020, popular article

Abstract: Les propriétés d’amplification de la lumière des ions terres rares permettent en les incluant comme dopants dans le cœur des fibres optiques d’obtenir des sources laser et des amplificateurs de lumière compacts. Pour réduire la tendance à l’agrégation des terres rares qui diminuent leurs propriétés amplificatrices, le phosphore est employé comme co-dopant dans ces fibres. Cet article montre comment les méthodes de simulation à l’échelle atomique peuvent aider a' l'optimisation de ce co-dopage en contribuant a' une meilleure comprehension de la structure des verres phosphates [1] et des défauts qui leur sont liés [2]. Au CEA-DAM, ces resultats serviront aussi dans le cadre d'etudes sur le developpement de fibres optiques pour des mesures de dosimetrie radiative.
Keywords: glasses, P2O5, point defects, ab-initio
Published in RUNG: 18.09.2020; Views: 2840; Downloads: 0
This document has many files! More...

7.
Cathodoluminiscence study of defects in CeO2
Thanveer Thajudheen, Matjaž Valant, 2019, published scientific conference contribution abstract

Keywords: structural defects, ceria, cathodoluminiscence
Published in RUNG: 29.05.2019; Views: 2808; Downloads: 0
This document has many files! More...

8.
9.
Radiation Effects on Optical Fibers and Fiber-Based Sensors
Sylvain Girard, A. Boukenter, Youcef Ouerdane, Nicolas Richard, Philippe Paillet, Layla Martin-Samos, Luigi Giacomazzi, Claude Marcandella, 2015, independent scientific component part or a chapter in a monograph

Keywords: Optical Fibers, radiation-induced point defects, dosimetry, ab-initio
Published in RUNG: 24.10.2018; Views: 3664; Downloads: 0
This document has many files! More...

10.
Paramagnetic H-related defects in silica: a first-principles investigation
Luigi Giacomazzi, Layla Martin-Samos, Nicolas Richard, 2016, published scientific conference contribution

Keywords: silica, EPR, E'beta, first-principles, hydrogen related defects
Published in RUNG: 16.10.2018; Views: 3664; Downloads: 0
This document has many files! More...

Search done in 0.06 sec.
Back to top