Exploració per tema "Nanocrystals"
Ara es mostren els items 18-37 de 53
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Graphene-supported palladium phosphide PdP2 nanocrystals for ethanol electrooxidation
(2019-03-01)
Article
Accés obertWe present a procedure to produce single-phase PdP2 nanocrystals (NCs). The approach involves the reaction of palladium(II) acetylacetonate and hexamethylphosphoroustriamide to nucleate defective Pd5P2 nanoparticles that ... -
High-Efficiency Light-Emitting Diodes Based on Formamidinium Lead Bromide Nanocrystals and solution processed transport layers
(ACS, 2018-09-11)
Article
Accés obertPerovskite nanocrystal light-emitting diodes (LEDs) employing architecture comprising a ZnO nanoparticles electron-transport layer and a conjugated polymer hole-transport layer have been fabricated. The obtained LEDs ... -
Hollow PdAg-CeO2 heterodimer nanocrystals as highly structured heterogeneous catalysts
(Nature, 2019-12-01)
Article
Accés obertIn the present work, hollow PdAg-CeO2 heterodimer nanocrystals (NCs) were prepared and tested as catalysts for the selective hydrogenation of alkynes. These nanostructures combine for the first time the beneficial effect ... -
Influence of halide ions in the synthesis of gold-platinum nanocatalysts for hydrogen evolution reaction (HER)
(Universitat Politècnica de Catalunya, 2023-07-03)
Treball Final de Grau
Accés restringit per acord de confidencialitat
Realitzat a/amb: Institut de Ciència de Materials de Barcelona / Universidad Politécnica de MadridEls catalitzadors basats en platí han estat analitzats profundament per a usos en vies catalítiques. Recentment, els aliatges or-platí (AuPt) han suscitat l’interès de molts investigadors pel seu possible ús en la ... -
Influence of the ligand stripping on the transport properties of nanoparticle-based PbSe nanomaterials
(2020-01-07)
Article
Accés obertNanomaterials produced from the bottom-up assembly of nanocrystals may incorporate ~1020–1021 cm–3 not fully coordinated surface atoms, i.e., ~1020–1021 cm–3 potential donor or acceptor states that can strongly affect ... -
Ligand conversion in nanocrystal synthesis: the oxidation of alkylamines to fatty acids by nitrate
(American Chemical Society (ACS), 2021-11-22)
Article
Accés obertLigands are a fundamental part of nanocrystals. They control and direct nanocrystal syntheses and provide colloidal stability. Bound ligands also affect the nanocrystals’ chemical reactivity and electronic structure. Surface ... -
Liquid crystalline properties of symmetric and asymmetric end-grafted cellulose nanocrystals
(2021-07-23)
Article
Accés obertThe hydrophilic polymer poly[2-(2-(2-methoxy ethoxy)ethoxy)ethylacrylate] (POEG3A) was grafted onto the reducing end-groups (REGs) of cellulose nanocrystal (CNC) allomorphs, and their liquid crystalline properties were ... -
Liquid crystalline thermosets based on anisotropic phases of cellulose nanocrystals
(2013-10)
Article
Accés obertA new class of liquid crystalline thermosets (LCTs) was successfully produced containing lyotropic cellulose nanocrystals (CNCs) as the primary mesogenic component (up to 72 wt%) by the addition of non-mesogenic epoxy ... -
Low-Cost RoHS Compliant Solution Processed Photovoltaics Enabled by Ambient Condition Synthesis of AgBiS2 Nanocrystals
(ACS, 2020-03-04)
Article
Accés obertTwo major challenges exist before colloidal nanocrystal solar cells can take their place in the market: So far, these devices are based on Pb/Cd-containing nanocrystals, and second, the synthesis of these nanocrystals takes ... -
Low-temperature colloidal synthesis of CuBiS2 nanocrystals for optoelectronic devices
(Royal Society of Chemistry, 2017-11-11)
Article
Accés obertA new facile colloidal synthesis of CuBiS2 (CBS) nanocrystals with monodispersed size and good quality has been developed. The CBS nanocrystal films was deposited by solid-state ligand exchange and their field effect ... -
Mixed AgBiS2 nanocrystals for photovoltaics and photodetectors
(Royal Society of Chemistry, 2022-03-03)
Article
Accés obertHeavy-metal-free colloidal nanocrystals are gaining due attention as low-cost, semiconducting materials for solution-processed optoelectronic applications. One common limitation of such materials is their limited carrier ... -
Molecular-free synthesis of multifunctional graphene oxide-copper sulfide nanocomposite gels
(Universitat Politècnica de Catalunya, 2021-07-22)
Projecte Final de Màster Oficial
Accés restringit per acord de confidencialitat -
Nanocristales de quitina-modificada cargados en fibras de ácido poliláctico: obtención de matrices más hidrofílicas
(Universitat Politècnica de Catalunya, 2018-06-27)
Treball Final de Grau
Accés obertLa técnica de electrohilado permite formar matrices de fibras en escala micrométrica y nanométrica a partir de disoluciones de polímeros. Se pueden emplear materiales biodegradables como no biodegradables, pero en general ... -
Nanofiber composites of polyvinyl alcohol and cellulose nanocrystals: manufacture and characterization
(2010-03-08)
Article
Accés restringit per política de l'editorialCellulose nanocrystals (CN) were used to reinforce nanofibers in composite mats produced via electrospinning of poly(vinyl alcohol) (PVA) with two different concentrations of acetyl groups. Ultrathin cross-sections of the ... -
Natural additives to enhance the barrier properties of nanocellulose films
(2022)
Comunicació de congrés
Accés obertFinding alternatives to fossil-based materials is one of the most important challenges of our time. Since cellulose is the most abundant natural polymer on the planet, its use to solve this challenge would be ideal. In the ... -
One-component nanocomposites based on polymer-grafted cellulose nanocrystals
(American Chemical Society (ACS), 2020-02-11)
Article
Accés obertCellulose nanocrystals (CNCs) are widely used as reinforcing fillers in polymers due to their exceptionally high stiffness and strength and because the biological species from which they are isolated represent renewable ... -
Orientation of polylactic acid–chitin nanocomposite films via combined calendering and uniaxial drawing: Effect on structure, mechanical, and thermal properties
(2021-12-06)
Article
Accés obertThe orientation of polymer composites is one way to increase the mechanical properties of the material in a desired direction. In this study, the aim was to orient chitin nanocrystal (ChNC)-reinforced poly(lactic acid) ... -
Pickering emulsions stabilized by cellulose nanocrystals grafted with thermo-responsive polymer brushes
(2012-03)
Article
Accés obertCellulose nanocrystals (CNCs) from ramie fibers are studied as stabilizers of oil-in-water emulsions. The phase behavior of heptane and water systems is studied, and emulsions stabilized by CNCs are analyzed by using drop ... -
Poly(N-isopropylacrylamide) brushes grafted from cellulose nanocrystals via surface-initiated single-electron transfer living radical polymerization
(2010-10-11)
Article
Accés obertCellulose nanocrystals (CNCs) or nanowhiskers produced from sulfuric acid hydrolysis of ramie fibers were used as substrates for surface chemical functionalization with thermoresponsive macromolecules. The CNCs were grafted ... -
Polymer nanocomposites with cellulose nanocrystals made by co-precipitation
(Wiley, 2018-06-20)
Article
Accés obertA premixing method to produce polymer nanocomposites with cellulose nanocrystals (CNCs) is reported. This method involves the dissolution and dispersion of a polymer and CNCs in an organic solvent, co-precipitation into ...