0000000000301116

AUTHOR

Peter Müller-buschbaum

showing 3 related works from this author

Elastic torsion effects in magnetic nanoparticle diblock-copolymer structures

2011

Magnetic properties of thin composite films, consisting of non-interacting polystyrene-coated γ-Fe(2)O(3) (maghemite) nanoparticles embedded into polystyrene-block-polyisoprene P(S-b-I) diblock-copolymer films are investigated. Different particle concentrations, ranging from 0.7 to 43 wt%, have been used. The magnetization measured as a function of external field and temperature shows typical features of anisotropic superparamagnets including a hysteresis at low temperatures and blocking phenomena. However, the data cannot be reconciled with the unmodified Stoner-Wohlfarth-Néel theory. Applying an appropriate generalization we find evidence for either an elastic torque being exerted on the …

Models StatisticalCondensed matter physicsPolymersChemistryPhysicsBiophysicsTemperatureMaghemiteTorsion (mechanics)Nanoparticleengineering.materialCondensed Matter PhysicsMagnetic hysteresisElasticityMagneticsMagnetizationMaterials TestingengineeringAnisotropyNanoparticlesMagnetic nanoparticlesGeneral Materials ScienceAnisotropySuperparamagnetismJournal of Physics: Condensed Matter
researchProduct

State of the art and prospects for halide perovskite nanocrystals

2021

Financiado para publicación en acceso aberto: Universidade de Vigo/CISUG Metal-halide perovskites have rapidly emerged as one of the most promising materials of the 21st century, with many exciting properties and great potential for a broad range of applications, from photovoltaics to optoelectronics and photocatalysis. The ease with which metal-halide perovskites can be synthesized in the form of brightly luminescent colloidal nanocrystals, as well as their tunable and intriguing optical and electronic properties, has attracted researchers from different disciplines of science and technology. In the last few years, there has been a significant progress in the shape-controlled synthesis of …

light-emitting devicesGeneral Physics and AstronomyNanotechnology02 engineering and technology010402 general chemistry01 natural sciences7. Clean energyphotocatalystsmetal-halide perovskite nanocrystalslead-free perovskite nanocrystalsPhotovoltaicsGeneral Materials ScienceNanoscience & NanotechnologyPerovskite (structure)Electronic propertiesPhysicsbusiness.industryPhysicsperovskite nanoplateletsGeneral Engineering021001 nanoscience & nanotechnology0104 chemical sciencesddc:Chemistryphotovoltaicsperovskite nanocubesmetal-halide perovskite nanocrystals; perovskite nanoplatelets; perovskite nanocubes; perovskite nanowires; lead-free perovskite nanocrystals; light-emitting devices; photovoltaics; lasers; photocatalysts; photodetectorsNanocrystalperovskite nanowiresphotodetectors2307 Química Física0210 nano-technologybusinessEngineering sciences. Technologylasers
researchProduct

Hierarchically Structured Titania Films Prepared by Polymer/Colloidal Templating

2010

Hierarchically structured titania films for application in hybrid solar cells are prepared by combining microsphere templating and sol-gel chemistry with an amphiphilic diblock copolymer as a structure-directing agent. The films have a functional structure on three size scales: (1) on the micrometer scale a holelike structure for reduction of light reflection, (2) on an intermediate scale macropores for surface roughening and improved infiltration of a hole transport material, and (3) on a nanometer scale a mesoporous structure for charge generation. Poly(dimethyl siloxane)-block-methyl methacrylate poly(ethylene oxide) (PDMS-b-MA(PEO)) is used as a structure-directing agent for the prepara…

chemistry.chemical_classificationMaterials sciencePolymerHybrid solar cellMethacrylatelaw.inventionchemistry.chemical_compoundchemistryChemical engineeringlawPolymer chemistryCopolymerGrazing-incidence small-angle scatteringGeneral Materials ScienceCalcinationMethyl methacrylateMesoporous materialACS Applied Materials & Interfaces
researchProduct