scispace - formally typeset
Search or ask a question
Institution

University of Lorraine

EducationNancy, France
About: University of Lorraine is a education organization based out in Nancy, France. It is known for research contribution in the topics: Population & Nonlinear system. The organization has 11942 authors who have published 25010 publications receiving 425227 citations. The organization is also known as: Lorraine University.


Papers
More filters
Journal ArticleDOI
03 Apr 2017-ACS Nano
TL;DR: These Goldhelices based on inorganic templates are much more robust than previously reported organic-based chiroptical nanostructures, making them good candidates for complex hierarchical organization, providing a promising approach for light management and benefits in applications such as circular polarizers, chiral metamaterials, or chiral sensing in the visible range.
Abstract: Plasmonic nanoparticles, particularly gold nanoparticles (GNPs) hold a great potential as structural and functional building blocks for three-dimensional (3D) nanoarchitectures with specific optical applications. However, a rational control of their assembly into nanoscale superstructures with defined positioning and overall arrangement still remains challenging. Herein, we propose a solution to this challenge by using as building blocks: (1) nanometric silica helices with tunable handedness and sizes as a matrix and (2) GNPs with diameter varying from 4 to 10 nm to prepare a collection of helical GNPs superstructures (called Goldhelices hereafter). These nanomaterials exhibit well-defined arrangement of GNPs following the helicity of the silica template. Strong chiroptical activity is evidenced by circular dichroism (CD) spectroscopy at the wavelength of the surface plasmon resonance (SPR) of the GNPs with a anisotropy factor (g-factor) of the order of 1 × 10–4, i.e., 10-fold larger than what is typicall...

95 citations

Journal ArticleDOI
TL;DR: The authors' results suggest a significant effect of tree species on soil microbiota though in different ways for each of the three microbial groups, whereas bacterial communities differ to a great degree between rhizosphere and bulk soils, regardless of the tree species.
Abstract: The impacts of plant species on the microbial communities and physico-chemical characteristics of soil are well documented for many herbs, grasses and legumes but much less so for tree species. Here, we investigate by rRNA and ITS amplicon sequencing the diversity of microorganisms from the three domains of life (Archaea, Bacteria and Eukaryota:Fungi) in soil samples taken from the forest experimental site of Breuil-Chenue (France). We discovered significant differences in the abundance, composition and structure of the microbial communities associated with two phylogenetically distant tree species of the same age, deciduous European beech (Fagus sylvatica) and coniferous Norway spruce (Picea abies Karst), planted in the same soil. Our results suggest a significant effect of tree species on soil microbiota though in different ways for each of the three microbial groups. Fungal and archaeal community structures and compositions are mainly determined according to tree species, whereas bacterial communities differ to a great degree between rhizosphere and bulk soils, regardless of the tree species. These results were confirmed by quantitative PCR, which revealed significant enrichment of specific bacterial genera, such as Burkholderia and Collimonas, known for their ability to weather minerals within the tree root vicinity.

95 citations

Journal ArticleDOI
TL;DR: In this paper, the growth characteristics of eutectic Si in unmodified and Sr-modified Al-12.7%Si alloys were investigated by microstructure-correlated crystallographic analyses.

95 citations

Journal ArticleDOI
TL;DR: In this paper, a review and an analysis of several alternatives proposed during last years to use these off-gases are carried out, with a particular focus on thermochemical processes, and three main alternatives are considered: the thermal use of the gases, the recovery of valuable compounds for selling and the synthesis of a high-added value product.
Abstract: The steel industry is the main generator of CO2 among the different industrial sectors. That is why efforts are being made to reduce or avoid CO2 emissions by process optimisation or by Carbon Capture and Storage (CCS) processes. In the steel production by blast furnace technology, three main off-gases are generated, namely the Blast Furnace Gas (BFG), the Coke-Oven Gas (COG) and the Basic Oxygen Furnace Gas (BOFG). Many processes and technologies can be identified for their use, depending on the volume and composition of the steelwork off-gases. In the present work, a review and an analysis of several alternatives proposed during last years to use these off-gases are carried out, with a particular focus on thermochemical processes. Three main alternatives are considered: the thermal use of the gases, the recovery of valuable compounds for selling and the synthesis of a high-added value product. The possible implementation of these alternatives may conduct to improvements in energy efficiency of the steel making process with subsequent reduction of CO2 emissions.

95 citations

Journal ArticleDOI
TL;DR: In this paper, suspension plasminar spraying (SPS) was used to improve TBC thermal properties and the effect of heat conduction paths, which impact thermal diffusivity values was highlighted for the columnar structure.
Abstract: Improving efficiency of hot section components of aero engines such as turbine blades or nozzle guide vanes is critical for the aircraft industry. Over many years, the development of advanced Thermal Barrier Coatings (TBCs) has been a field of active research to achieve this purpose. Electron Beam Physical Vapor Deposition (EB-PVD) and Atmospheric Plasma Spraying (APS) processes are widely used to apply TBCs on metal substrates. High costs and rather high thermal conductivities of EB-PVD coatings, as well as low thermal lifetime of APS ones, are real drawbacks for next generations of turbine engines. In this study, Suspension Plasma Spraying (SPS) was assessed to improve TBC thermal properties. It was shown that the SPS process allows to perform columnar microstructure easily tunable in terms of both compaction of columnar structure and thermal conductivity. Thermal conductivities were in the 0.7–1.25 W·m− 1·K− 1 range for SPS coatings while values of 0.9 and 1.5 W·m− 1·K− 1 were measured for APS and EB-PVD coatings, respectively. The effect of heat conduction paths, which impact thermal diffusivity values, was highlighted for the columnar structure.

95 citations


Authors

Showing all 12161 results

NameH-indexPapersCitations
Jonathan I. Epstein138112180975
Peter Tugwell129948125480
David Brown105125746827
Faiez Zannad10383990737
Sabu Thomas102155451366
Francis Martin9873343991
João F. Mano9782236401
Jonathan A. Epstein9429927492
Muhammad Imran94305351728
Laurent Peyrin-Biroulet9090134120
Athanase Benetos8339131718
Michel Marre8244439052
Bruno Rossion8033721902
Lyn March7836762536
Alan J. M. Baker7623426080
Network Information
Related Institutions (5)
University of Paris
174.1K papers, 5M citations

95% related

École Normale Supérieure
99.4K papers, 3M citations

94% related

Centre national de la recherche scientifique
382.4K papers, 13.6M citations

94% related

École Polytechnique Fédérale de Lausanne
98.2K papers, 4.3M citations

94% related

National Research Council
76K papers, 2.4M citations

93% related

Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
202375
2022477
20213,153
20202,987
20192,799
20182,593