Luminescent carbon dots (L-CDs) with high quantum yield value (44.7%) and controllable emission wavelengths were prepared via a facile hydrothermal method. Importantly, the surface states of materials could be engineered so that their photoluminescence was either excitation-dependent or distinctly independent. This achieved by changing density amino-groups on L-CD surface. The above successfully used to prepare multicolor L-CDs/polymer composites, which exhibited blue, green even white...

This work investigates the anti-ice performance of various superhydrophobic surfaces under different conditions. The adhesion strength glaze ice (similar to that deposited during "freezing rain") is used as a measure ice-releasing properties. results show ice-repellent properties materials deteriorate icing/deicing cycles, surface asperities appear be gradually damaged. It also shown anti-icing efficiency significantly lower in humid atmosphere, water condensation both on top and between...

In this work, we measured the adhesion strength of artificially created glaze ice (similar to accreted in nature) on rough fluoropolymer-based hydrophobic surfaces with different contact angle (CA) and wetting hysteresis. The previously reported direct correlation between repellency CA superhydrophobic is shown be only valid for low Another was found hysteresis similar chemistry.

Bifunctional electrocatalysts for both hydrogen evolution reaction (HER) and oxygen (OER) are very crucial converting water into clean fuel through overall splitting. Here, we report on a bifunctional catalyst based Ir-doped NiV layered double hydroxide with Ir–O–V catalytic groups which dissociation, HER, OER occur Ir, bridge O, V atoms, respectively. Interestingly, the dopant Ir ions were found to play triple role: (i) serve as sites (ii) reduce charge density adjacent oxygen, thus...

Abstract The use of photons to directly or indirectly drive chemical reactions has revolutionized the field nanomaterial synthesis resulting in appearance new sustainable laser chemistry methods for manufacturing micro‐ and nanostructures. incident radiation triggers a complex interplay between physical processes at interface solid surface liquid gas environment. In such multi‐parameter system, precise control over nanostructures is not possible without deep understanding both...

The aqueous dispersion of ZnO quantum dots (QDs) with strong blue emission (quantum yield 76%) was synthesized through a simple solution route. water stability such QDs is provided by the hydroxyl groups on their surface, and suggested to arise from formation surface ZnO/oleic acid complexes. Under irradiation, these complexes are thought absorb excitation light 3.54 eV then generate 2.82 eV.

We report on a 100-fold capacitance increase in MoS2-based supercapacitors achieved via optimizing the in-plane 1T-2H phase hybridization of monolayers. Chemically exfoliated MoS2 monolayers were annealed at low temperature to tune their 1T content from 2% 60%. The obtained states confirmed by X-ray photoelectron and Raman spectroscopies. After degree, electrode based with 40% exhibited outstanding performance resistance as 0.68 kΩ sq−1, specific 366.9 F g−1, retention ratio 92.2% after 1000...

We report on the controllable synthesis of diverse nanostructures using laser ablation a metal target in liquid medium. The nanodroplets generated by react with and produce various nanostructures, such as hollow nanoparticles, core-shell heterostructures, nanocubes, ordered arrays. A millisecond low power density is essential for obtaining nanodroplets, while material, reactivity medium, frequency are decisive controlling morphology size produced. This green powerful technique can be...

Laser ablation in liquid was used to prepare homogeneous copper–zinc alloy catalysts that exhibited excellent selectivity for C2H4 CO2 electroreduction, with faradaic efficiency values as high 33.3% at a potential of −1.1 V (vs reversible hydrogen electrode). The proximity Cu and Zn atoms on the surface catalyst found facilitate both stabilization CO* intermediate its transfer from their neighbors, where further dimerization protonation occur give rise large amount ethylene product. new...

Highly epitaxial ZnO nanowire-on-nanoplate structures as efficient and transferable electron field emitters are reported here. Well-faceted nanoplates can be used substrates for the growth of nanowires with a sharp high-quality interface, which significantly improves its emitter performance. Because scalable preparation, high performance facile transfer, novel material is potential applications in various optoelectronic devices. As service to our authors readers, this journal provides...

This work analyzes the anti-icing performance of flat aluminum surfaces coated with widely used alkyl-group based layers octadecyltrimethoxysilane, fluorinated alkylsilane and stearic acid as they are subjected to repeated icing/deicing cycles. The wetting properties samples upon long-term immersion in water also evaluated. results demonstrate that smooth grafted alkyl groups prone gradual degradation their hydrophobic icephobic properties, which is caused by interactions reactions both ice...

Abstract For all‐solution‐processed (ASP) devices, transparent conducting oxide (TCO) nanocrystal (NC) inks are anticipated as the next‐generation electrodes to replace both those synthesized by sputtering techniques and consisting of rare metals, but a universal one‐pot method prepare these is still lacking. A strategy now described; through simply heating mixture metal–organic precursors wide range TCO NC inks, which can be assembled into high‐performance for use in ASP optoelectronics,...

This work aimed to prepare nanostructures of ZnO with various lasers, testing them as photocatalysts, and comparing their morphology activity in the degradation organic pollutants aqueous media. nanospheres (ns-ZnO) nanorods (ms-ZnO) were prepared via laser ablation a Zn metal plate water using nanosecond- millisecond-pulsed respectively. The obtained materials characterized set optical, structural, surface-science techniques, such UV-vis spectroscopy, X-ray diffraction (XRD), transmission...

Highly active and stable catalysts are very crucial for boosting the oxygen evolution reaction (OER) converting water into clean fuel. Here, we adopt laser ablation in liquid technique to produce Ru nanoparticles (NPs) enriched with grain boundaries (GBs). The as-prepared NPs were then applied as an OER catalyst, achieving overpotential low 202 mV @ 10 mA cm–2 0.5 M H2SO4. Moreover, catalyst demonstrated stability over h, which is much better than commercial RuO2 (305 mV). EXAFS analysis DFT...

Nanophotonics based on resonant nanostructures and metasurfaces made of halide perovskites have become a prospective direction for efficient light manipulation at the subwavelength scale in advanced photonic designs. One main challenges this field is lack large-scale low-cost technique perovskite structures fabrication preserving highly luminescence. Here, unique properties addressed to their extremely low thermal conductivity (lower than that silica glass) high defect tolerance apply...

Long-term stability in contact with water of organosilane layers formed by octadecyltrimethoxysilane (ODTMS) on polished aluminum alloy (AA2024) through dip-coating was studied combining SEM, angle measurements, and X-ray photoelectron spectroscopy. Similar were AA2024 coated permanganate conversion coating, 1,2-bis(triethoxysilyl)ethane (BTSE) hydrated SiOx as under-layers, after which their long-term durability also tested. During immersion for about one month, all the samples exhibited a...

The development of new functional materials based on metal-organic frameworks (MOFs) for adsorption and catalytic applications is one the promising trends modern science. Zr-based MOFs, specifically UiO-66, are considered as supports metallic catalysts 5-hydroxymethylfurfural platform molecule reduction into valuable products. present work focused effect NH2 modification UiO-66 its structure properties. samples were prepared by a solvothermal method. obtained was studied X-ray diffraction,...