Browsing by Subject "Nanocristalls"
Now showing items 21-40 of 52
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Graphene-supported palladium phosphide PdP2 nanocrystals for ethanol electrooxidation
(2019-03-01)
Article
Open AccessWe 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 ... -
Hollow PdAg-CeO2 heterodimer nanocrystals as highly structured heterogeneous catalysts
(Nature, 2019-12-01)
Article
Open AccessIn 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 ... -
Improved electronic coupling in hybrid organic–inorganic nanocomposites employing thiol-functionalized P3HT and bismuth sulfide nanocrystals
(Royal Society of Chemistry, 2014-06-19)
Article
Open AccessIn this study, we employ a thiol-functionalized polymer (P3HT-SH) as a leverage to tailor the nanomorphology and electronic coupling in polymer–nanocrystal composites for hybrid solar cells. The presence of the thiol ... -
Influence of the ligand stripping on the transport properties of nanoparticle-based PbSe nanomaterials
(2020-01-07)
Article
Open AccessNanomaterials 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 ... -
Influència de les nanofibres i nanocristalls de cel.lulosa en el comportament del fibrociment del ciment Pòrtland
(Universitat Politècnica de Catalunya, 2016-10-20)
Bachelor thesis
Restricted access - confidentiality agreement -
Ligand conversion in nanocrystal synthesis: the oxidation of alkylamines to fatty acids by nitrate
(American Chemical Society (ACS), 2021-11-22)
Article
Open AccessLigands 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
Open AccessThe 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
Open AccessA 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
Open AccessTwo 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 ... -
Mixed AgBiS2 nanocrystals for photovoltaics and photodetectors
(Royal Society of Chemistry, 2022-03-03)
Article
Open AccessHeavy-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)
Master thesis
Restricted access - confidentiality agreement -
Nanocristales de quitina-modificada cargados en fibras de ácido poliláctico: obtención de matrices más hidrofílicas
(Universitat Politècnica de Catalunya, 2018-06-27)
Bachelor thesis
Open AccessLa 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
Restricted access - publisher's policyCellulose 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)
Conference lecture
Open AccessFinding 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
Open AccessCellulose 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
Open AccessThe 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) ... -
Patience is a virtue: self-assembly and physico-chemical properties of cellulose nanocrystal allomorphs
(2020)
Article
Restricted access - publisher's policyCellulose nanocrystals (CNCs) are bio-based rod-like nanoparticles with a quickly expanding market. Despite the fact that a variety of production routes and starting cellulose sources are employed, all industrially produced ... -
Pickering emulsions stabilized by cellulose nanocrystals grafted with thermo-responsive polymer brushes
(2012-03)
Article
Open AccessCellulose 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
Open AccessCellulose 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
Open AccessA 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 ...
