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Blue photoluminescence from active carboxyl adatoms on nanoporous anodic alumina films.
Sci Rep
January 2025
Department of Physics, Jeonbuk National University, Jeonju, 54896, Republic of Korea.
Nanoporous anodic alumina (nPAA) films formed on aluminum in lower aliphatic carboxylic acids exhibit blue self-coloring and characteristic properties such as photoluminescence (PL), electroluminescence, and electron spin resonance. The blue colors are seemingly originated from the adsorbed radicals incorporating into the oxide during the aluminum anodization. However, there is lack of reports revealing the detailed activation mechanism of the adatoms in the complexes.
View Article and Find Full Text PDFHighly bright perovskite light-emitting diodes enabled by retarded Auger recombination.
Nat Commun
January 2025
Department of Physics, Chemistry and Biology (IFM), Linköping University, Linköping, Sweden.
One of the key advantages of perovskite light-emitting diodes (PeLEDs) is their potential to achieve high performance at much higher current densities compared to conventional solution-processed emitters. However, state-of-the-art PeLEDs have not yet reached this potential, often suffering from severe current-efficiency roll-off under intensive electrical excitations. Here, we demonstrate bright PeLEDs, with a peak radiance of 2409 W sr m and negligible current-efficiency roll-off, maintaining high external quantum efficiency over 20% even at current densities as high as 2270 mA cm.
View Article and Find Full Text PDFSynthesis and characterization of corn starch esters obtained in oleic acid/L(+)-tartaric acid medium.
Carbohydr Polym
March 2025
Planta Piloto de Ingeniería Química (PLAPIQUI), CONICET, - Universidad Nacional del Sur (UNS), Camino La Carrindanga km 7, 8000 Bahía Blanca, Argentina; Departamento de Ingeniería Química, UNS, Avenida Alem 1253, 8000 Bahía Blanca, Argentina. Electronic address:
In this study, corn starch esters were obtained by a novel methodology using oleic acid as an esterifying agent and L(+)-tartaric acid as both catalyst and esterifying agent. The degree of substitution (DS) was determined along the reaction time to control the level of substitution achieved (up to 0.33), while all the other reaction parameters were maintained constant.
View Article and Find Full Text PDFSelf-assembly of malto-oligosaccharide-block-solanesol in aqueous solutions: Investigating morphology and sugar-based physiological compatibility.
Carbohydr Polym
March 2025
Faculty of Engineering, Hokkaido University, Sapporo 060-8628, Japan. Electronic address:
Starch-derived hydrophilic malto-oligosaccharides (Glc, where n = 1-7) conjugated to hydrophobic solanesol through click chemistry, i.e., Glc-b-Sol copolymers, have demonstrated significant promise in developing fully natural block co-oligomers for solid-state nanopatterning applications.
View Article and Find Full Text PDFFully biosourced amphiphilic block copolymer from tamarind seed xyloglucan and solanesol: synthesis, aqueous self-assembly, and drug encapsulation.
Carbohydr Polym
March 2025
Faculty of Engineering, Hokkaido University, Sapporo 060-8628, Japan. Electronic address:
This study aims to explore the development of natural bio-based amphiphilic block copolymers for drug delivery applications. We investigated block copolymers derived from tamarind seed xyloglucan and solanesol, focusing on their synthesis, structural analysis, aqueous self-assembly, and drug encapsulation. Specifically, xyloglucan hydrolysate segments with number-average degrees of polymerization (DPs) of between 8 and 44 (XOS, XMS, XMS, XMS, and XMS) were used as the hydrophilic blocks, whereas plant-sourced solanesol was selected as the hydrophobic segment.
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