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In this book the electronic transport through rare-earth nanocontacts is investigated. These nanocontacts can be fabricated by the mechanically controlled break-junctions. The conductance through such a nanocontact is strongly influenced by the element's electronic structure. This is probably caused by the variable strength of localization of the 4f states.

Eindimensionaler Transport, Magnetismus, Nanokontakte, Seltene Erdenone-dimensional transport, magnetism, nanocontacts, rare-earth elements

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synthesis, characterization techniques and mechanistic studies, photocatalysis and water splitting, catalysis, energy conversion and storage, hybrids, magnetism, electrochemistry, modeling and theoretical studies

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Molecular magnets show many properties not met in conventional metallic magnetic materials, i.e. low density, transparency to electromagnetic radiation, sensitivity to external stimuli such as light, pressure, temperature, chemical modification or magnetic/electric fields, and others. They can serve as “functional” materials in sensors of different types or be applied in high-density magnetic storage or nanoscale devices. Research into molecule-based materials became more intense at the end of the 20th century and is now an important branch of modern science. The articles in this Special Issue, written by physicists and chemists, reflect the current work on molecular magnets being carried out in several research centers. Theoretical papers in the issue concern the influence of spin anisotropy in the low dimensional lattice of the resulting type of magnet, as well as thermodynamics and magnetic excitations in spin trimers. The impact of external pressure on structural and magnetic properties and its underlying mechanisms is described using the example of Prussian blue analogue data. The other functionality discussed is the magnetocaloric effect, investigated in coordination polymers and high spin clusters. In this issue, new molecular magnets are presented: (i) ferromagnetic high-spin [Mn6] single-molecule magnets, (ii) solvatomagnetic compounds changing their structure and magnetism dependent on water content, and (iii) a family of purely organic magnetic materials. Finally, an advanced calorimetric study of anisotropy in magnetic molecular superconductors is reviewed.

Heisenberg --- S = 1/2 XXZ model --- spin anisotropy --- square lattice --- chain --- rectangular lattice --- Berezinskii-Kosterlitz-Thouless phase transition --- phase diagram --- quantum magnet --- molecular magnets --- magnetocaloric effect --- octacyanometallates --- critical behaviour --- coordination polymers --- manganese(III) --- salicylamidoxime --- molecular magnetism --- single-molecule magnets --- radical anion --- redox --- magnetism --- antiferromagnetic coupling --- dioxothiadiazole --- molecular magnetism --- octacyanotungstate(V) --- copper(II) --- cyclam --- cyano bridge --- magnetic properties --- ?-d system --- thermodynamic measurement --- superconductivity --- antiferromagnetism --- single crystal heat capacity measurement --- magnetic conductor --- molecular magnets --- spin clusters --- Heisenberg exchange Hamiltonian --- thermodynamics --- inelastic neutron scattering --- exact diagonalization --- Prussian blue analogues --- effect of high pressure --- crystal structure --- magnetic properties --- superexchange interaction

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This Special Issue gathers research from different branches of science and engineering disciplines working on experiments and modelling of nanocomposites into one volume. The Guest Editor welcomes papers dedicated to experimental, computational, and theoretical aspects dealing with many important state-of-the-art technologies and methodologies regarding the synthesis, fabrication, characterization, properties, design, and applications, and both finite element analysis and molecular dynamic simulations, of nanocomposite materials and structures. Full papers covering novel topics, extending the frontiers of the science and technology of nanoreinforced composites are encouraged. Reviews covering topics of major interest will be also considered.

carbon nanotube --- interface --- cohesive element --- equivalent fiber --- CNT agglomeration --- YN --- ScN --- pressure --- elasticity --- ab initio --- stability --- nanocomposites --- Fe3Al --- Fe-Al --- magnetism --- interfaces --- ab initio --- stability --- disorder --- nanoindentation --- graphene/Fe composite --- critical yield strength --- hardness --- elastic modulus --- boron nitride honeycomb --- molecular dynamics simulation --- mechanical property --- piezoelectric property --- interface force fields --- CNTs/epoxy nanocomposites --- coarse-grained model --- molecular dynamics --- 3D fiber-metal laminates --- graphene nanoplatelets --- impact buckling --- delamination buckling --- delamination propagation --- temperature effect

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Clean energy and fuel storage are often required for both stationary and automotive applications. Some of these clean energy and fuel storage technologies currently under extensive research and development include hydrogen storage, direct electric storage, mechanical energy storage, solar–thermal energy storage, electrochemical (batteries and supercapacitors), and thermochemical storage. The gravimetric and volumetric storage capacity, energy storage density, power output, operating temperature and pressure, cycle life, recyclability, and cost of clean energy or fuel storage are some of the factors that govern efficient energy and fuel storage technologies for potential deployment in energy harvesting (solar and wind farms) stations and onboard vehicular transportation. This Special Issue thus serves the need for promoting exploratory research and development on clean energy and fuel storage technologies while addressing their challenges to practical and sustainable infrastructures.

dye-sensitized solar cells --- carbon materials --- Ag nanoparticles --- freestanding TiO2 nanotube arrays --- gas turbine engine --- lean direct injection --- four-point --- low emissions combustion --- carbonate gas reservoirs --- water invasion --- recovery factor --- aquifer size --- production rate --- hydrogen storage --- complex hydrides --- nanocatalyst --- LiNH2 --- MgH2 --- ball milling --- Li-ion batteries --- nanocomposite materials --- cathode --- anode --- binder --- separator --- ionic liquid --- vertically oriented graphene --- electrical double layers --- charge density --- capacitance --- gas storage --- material science --- rock permeability --- synthetic rock salt testing --- Klinkenberg method --- hydrogen storage systems --- hydrogen absorption --- thermochemical energy storage --- metal hydride --- magnetism --- heat transfer enhancement --- Power to Liquid --- Fischer–Tropsch --- dynamic modeling --- lab-scale --- lithium-ion batteries --- simplified electrochemical model --- state of charge estimator --- extended kalman filter --- hot summer and cold winter area --- PCM roof --- comprehensive incremental benefit --- conjugate phase change heat transfer --- lattice Boltzmann method --- large-scale wind farm --- auxiliary services compensation --- battery energy storage system --- optimal capacity --- equivalent loss of cycle life --- hydrogen storage --- porous media --- bacterial sulfate reduction --- methanogenesis --- gas loss --- diffusion --- reactive transport modeling --- PHREEQC --- energy discharge --- bubbles burst --- bubbles transportation --- crystal growth rates --- undercooling --- salt cavern --- leaching tubing --- flutter instability --- flow-induced vibration --- internal and reverse external axial flows --- thermal energy storage (TES) --- slag --- regenerator --- concentrated solar power (CSP) --- quality function deployment (QFD) --- failure mode and effect analysis (FMEA) --- thermal energy storage --- electrochemical energy storage --- hydrogen energy storage --- salt cavern energy storage