Materials Literature
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2D Molybdenum disulfide (MoS2 ) is a promising candidate material for high-speed and flexible optoelectronic devices, but only with low photoresponsivity. Here, a large enhancement of photocurrent response is obtained by coupling few-layer MoS2 with Au plasmonic nanostructure arrays. Au nanoparticles or nanoplates pla…
Nanostructured photonic materials enable control and manipulation of light at subwavelength scales and exhibit unique optical functionalities. In particular, plasmonic materials and metamaterials have been widely utilized to achieve spectral transmission, reflection, and absorption filters based on localized or deloca…
Surface reactions with oxygen are a fundamental cause of the degradation of phosphorene. Using first-principles calculations, we show that for each oxygen atom adsorbed onto phosphorene there is an energy release of about 2 eV. Although the most stable oxygen adsorbed forms are electrically inactive and lead only to m…
A generalized electronic diabatic model for chemical reactions includes a physical mechanism for the transition from a reactant-like to a product-like quantum state, namely, an external field. In our model, an external electric field couples states and modifies effective potential energy surfaces thereby allowing to t…
The aim of this master’s thesis was to study whether it is possible to use Chemcad or HSC Chemistry simulation software to reliably simulate the formation of flue gas in the combustion of solid fuels. If the software is able to accurately simulate flue gas formation, the results can be used in drafting environmental p…
This thesis investigates process variables influencing the quality of a prehydrolysis kraft pulping process for dissolving pulp production using data analysis and subsequent mill trials. The quality of pulp was determined as alkali resistance R10 and R18, and viscosity. In the data analysis, correlation matrix, PCA an…
Biomassoja hyödyntämällä ja jalostamalla voidaan vähentää fossiilisten raaka-aineiden käyttöä. Pyrolyysiprosessissa biomassoja lämpökäsitellään hapettomissa olosuhteissa biohiileksi. Prosessissa muodostuu myös kaasuja, joista osa voidaan kondensoida nesteiksi. Tässä työssä perehdyttiin pyrolyysiprosessiin, prosessista…
This work was carried in order to obtain new knowledge regarding preparation and characterization of two alkali lignin based nanoparticles (LNP) using both: unmodified (UM) and acetylated lignin (AC). This includes particle size and shape, as well as nanoparticle dispersion stability investigations. Additionally, nano…
One of the major challenges related to the use of composite materials in structural applications is the difficulty to predict the effect of their inherent variabilities on the mechanical behaviour for such materials. The structural properties do not only depend on the fabrication process, but also depend on the raw ma…
In the present work the possibility of simultaneous localization of two electrons in $Δ^{100}$ and $Δ^{001}$ valleys in ordered structures with Ge/Si(001) quantum dots (QD) was verified experimentally by the electron spin resonance (ESR) method. The ESR spectra obtained for the ordered ten-layered QD structure in the…
Si l'utilisation des transformateurs piézoélectriques se bornait jusqu'alors à l'alimentation ou la protection de dispositifs électriques, ils sont aujourd'hui envisagés pour la génération de décharges plasma directement à leur surface. Les propriétés remarquables de ces générateurs piézoélectriques en font une altern…
The absence of an energy gap separating valence and conduction bands makes the low-energy electronic properties of graphene and its multi-layers sensitive to electron-electron interactions. In bilayers, for instance, interactions are predicted to open a gap at charge neutrality, turning the system into an insulator, a…
manuscripts of a high scientifi c quality representing original clinical, is to publish manuscripts of a high scientifi c quality representing original clinical, diagnostic diagnostic or experimental work in neuroscience.The scope is to act as an international forum for the dissemination of information advancing or ex…
National audience
Il progressivo aumento delle dimensioni dei telescopi e della loro complessita ha sottolineato la necessita di disporre di nuove tecnologie per la realizzazione degli elementi disperdenti da utilizzare in ambito spettroscopico. Nuovi materiali sono stati studiati per offrire rinnovate prestazioni alle strumentazioni e…
In this study we examine the phase transitions in single crystals of [(CH3)2NH2]Co(HCOO)3], using magnetization and specific heat measurements as a function of temperature and magnetic field. Magnetisation measurements indicate a transition at 15 K that is associated with an antiferromagnetic transition. The results o…
Today graphene nanoribbons and other graphene-based nanostructures can be synthesized with atomic precision. But while investigations have concentrated on straight graphene ribbons of fixed crystal orientation, ribbons with intrinsic curvature have remained mainly unexplored. Here, we investigate electronic transport…
Coupling of light to charges in a metallic nanoparticle leads to hybrid light-matter states, localised surface plasmon polaritons. They are characterised by very strong field intensities in vicinity of the nanoparticle. This field enhancement can be exploited by coupling the nanoparticles to quantum emitters, e.g. mol…
International audience
Chemical compounds and drugs are often modeled as graphs where each vertex represents an atom of molecule and covalent bounds between atoms are represented by edges between the corresponding vertices. This graph derived from a chemical compounds is often called its molecular graph and can be different structures. In t…