Importance of Ion Size on the Dominance of Water–Ion Versus Water–Water Interactions in Au-Supported Solvatomers

Nano Letters, Год журнала: 2025, Номер unknown

Опубликована: Янв. 31, 2025

The solvation of ions at interfaces is important to areas as diverse atmospheric sciences, energy materials, and biology. Despite the significance, fundamental understanding, particularly molecular level, remains incomplete. Here, we probe initial two singly charged but differently sized (Li Cs) on a Au(111) by combining low-temperature scanning tunneling microscopy with density functional theory. Real-space scale information reveals that water–ion interactions dominate Li−water system, whereas water–water in Cs case, both cases, surface confines formed solvatomers dimensions. difference prevalent leads disparate symmetry binding patterns shells observed, well significantly different ion−surface interactions. relationship between water number, geometry, electronic structure obtained here an essential step toward understanding heterogeneous nanoscale.

Язык: Английский

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Silane Network Passivation Through Lead‐Sulfur Interaction of X‐Type Thiol‐Group Ligands for Polar‐Resistance and Improved Mobility in Perovskite Quantum Dots

Advanced Optical Materials, Год журнала: 2025, Номер unknown

Опубликована: Фев. 27, 2025

Abstract The surface ligands of perovskite quantum dots (PQDs) with colloidal properties are critical determinants efficiency, stability, and passivation. However, structures sensitive to water humid environments, which leads decomposition, they decisively limit stability through ligand structure control. Herein, an approach using 3‐mercaptopropyltrimethoxysilane (MPTMS) among silane materials the advantages chemical nontoxicity is proposed. excellent structural MPTMS confirmed by interaction Pb‐S, formed interparticle network reaction methoxy group bonded Si. Additionally, fabricated PQDs indicate superior optical performance suppressing moisture acetone solvents. Particularly, passivation particles conferred hydrophobicity, as via contact angle energy analysis. Furthermore, networks exchange strategy, suggesting that a facile platform for maintaining high quality in aqueous environments.

Язык: Английский

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Halide Perovskite Photocatalysts for Clean Fuel Production and Organic Synthesis: Opportunities and Challenges

Advanced Materials, Год журнала: 2025, Номер unknown

Опубликована: Май 9, 2025

Abstract The need to constrain the use of fossil fuels causing global warming is motivating development a variety photocatalysts for solar‐to‐fuel generation and chemical synthesis. In particular, semiconductor‐based have been extensively exploited in solar‐driven organic synthesis, carbon dioxide (CO 2 ) conversion into value‐added products, hydrogen (H from water O) splitting. Recently, metal halide perovskites (MHPs) emerged as an important class semiconductors heterogeneous photocatalysis owing their interesting properties. Despite key issues with long‐term stability degradation polar solvents due ionic character, there has significant progress perovskite‐based improving performance gas liquid phases. This review discusses state‐of‐the‐art using photoelectrocatalysis production halogen acid solutions, CO reduction chemicals, various transformations. different types used, design strategies overcome instability solvents, efficiencies achieved are discussed. Furthermore, outstanding challenges associated electrolytes how can be improved

Язык: Английский

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Enhancing the Optical Properties and Stability of CsPbBr₃ Quantum Dots through Ligand Modification, Encapsulation, and Interaction with a Superhydrophobic Polymer

ACS Applied Materials & Interfaces, Год журнала: 2025, Номер 17(11), С. 17026 - 17035

Опубликована: Март 5, 2025

Reducing the detachment of ligands on all-inorganic cesium lead bromide perovskite quantum dots (CsPbBr3 PQDs) presents a significant challenge to their practical applications, despite remarkable optoelectronic properties. Herein, novel strategy was introduced passivate surface defects CsPbBr3 PQDs by employing short-chain and functional groups within polymer matrix enhance processability. Guanidinopropanoic acid (GPA) employed as coligand alongside oleic oleylamine synthesize CsPbBr3-GPA via hot injection method. A nitrogen-containing, superhydrophobic mesoporous polymer, poly(divinylbenzene)-vinylimidazole (PDVB-Vim), utilized an innovative encapsulation material for PQDs, resulting in formation CsPbBr3-GPA@PDVB-Vim composite. were successfully protected from unfavorable external stimulation, such water UV light, protective PDVB-Vim. retains over 76% its initial photoluminescence intensity after 31 days 68% 96 h continuous exposure 365 nm irradiation at 15 mW·cm-2. The screen printing with methyl methacrylate, butyl styrene demonstrates potential stable light conversion wearable devices. This breakthrough may pave way further advancements using highly photoluminescent luminescent textiles applications.

Язык: Английский

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2-Bromohexadecanoic Acid as a Novel Bidentate Ligand for Passivation of Cesium Lead Halide Perovskite Nanocrystals with Near-Unity Photoluminescence Quantum Yield and Superior Photostability

ACS Applied Materials & Interfaces, Год журнала: 2025, Номер unknown

Опубликована: Апрель 14, 2025

Halide vacancies on the surfaces of cesium lead halide perovskite (CsPbX3, X = Cl, Br, or I) nanocrystals (NCs) play a crucial role in their photoluminescence quantum yield (PLQY) and photostability. However, effectively passivating these remains challenge. Here, 2-bromohexadecanoic acid (BHA) is introduced as bidentate auxiliary ligand for CsPbX3 NCs. The CsPbBr3 CsPbBr1.5I1.5 NCs, comodified with BHA, oleic (OA), oleylamine (OLA) 20% OA substituted by are synthesized using hot-injection technique designated BHA-CsPbBr3 BHA-CsPbBr1.5I1.5 NCs exhibit PLQY 97% retain 42.19% original intensity after 48 h continuous ultraviolet light exposure. (PL) properties, stability, PL recombination mechanism investigated detail. It believed that carboxyl oxygen ortho-bromine atoms enhance binding strength BHA to surface CsPbX3. Additionally, Br- ions produced from biomolecular nucleophilic substitution reaction between OLA partially occupy anionic These interactions reduce performance

Язык: Английский

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Dual stimuli-responsive prodrug co-delivery nanosystem of salicylic acid and bioavailable silicon for long-term immunity in plant

Journal of Nanobiotechnology, Год журнала: 2025, Номер 23(1)

Опубликована: Май 7, 2025

Plant-induced resistance plays a crucial role in the plant defense system by activating intrinsic immune mechanisms. In this study, novel amidase- and redox-responsive codelivery nanosystem was developed covalently linking salicylic acid (SA) to functionalized disulfide-doped mesoporous silica nanoparticles (MSNs-ss-NH2) for efficient delivery of SA bioavailable silicon concurrently. Physicochemical characterization confirmed successful preparation MSNs-ss-SA, demonstrating its structural integrity glutathione amidase responsive degradation mechanism. With particle size approximately 90 nm, MSNs-ss-SA could penetrate stomata rice leaves, facilitating intracellular transport silicon. Biological activity assays revealed that exhibited superior efficacy inducing sheath blight compared conventional SA, which primarily due ability enhance physical barrier formation, strengthen antioxidant systems, upregulate expression key defense-related genes, increase chitinase synthesis, collectively triggering both systemic acquired induced resistance. Most importantly, biological safety assessments excellent compatibility with plants, aquatic organisms, soil ecosystems, human cell models. Therefore, prodrug shows significant potential sustainable agricultural disease management.

Язык: Английский

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Suppression of Thermally Assisted Photoluminescence Quenching in CsPbBr₃ Nanocrystals via Surface Engineering: Implications for Optoelectronic Devices

ACS Applied Nano Materials, Год журнала: 2024, Номер 7(17), С. 21036 - 21047

Опубликована: Сен. 4, 2024

Язык: Английский

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Leveraging Phenazine‐Based Ligands for Optimized Perovskite Optoelectronic Performance Through Chelation and Redox Engineering

Advanced Optical Materials, Год журнала: 2024, Номер unknown

Опубликована: Окт. 29, 2024

Abstract Perovskite nanocrystals (PNCs) hold immense potential for optoelectronic and photovoltaic applications. However, their performance is hindered by surface defects that promote non‐radiative recombination reduce stability. Surface engineering, particularly through defect passivation, crucial achieving high‐performing perovskite solar cells. Chelation has been shown to significantly improve the efficiency stability of In this study, a novel chelation strategy using 1,10‐Phenanthroline (Phen) presented as bidentate chelating ligand effectively target passivate these detrimental defects. By strategically designing Phenanthroline derivative, dipyrido[3,2‐a:2′,3′‐c]phenazin‐11‐amine (Phen‐derivative) with optimized redox potentials, dual functionality: efficient passivation hole transport achieved. X‐ray photoelectron spectroscopy (XPS) confirms superior binding capability Phen‐derivative due chelation. This strong interaction facilitates ultrafast charge transfer from PNCs formation long‐lived charge‐separated state, evidenced sustained bleaching in transient absorption spectra. A metal‐dipyrido[3,2‐a:2′,3′‐c]phenazin‐11‐amine complex (Ir‐complex) derived dipyrido[3,2‐a:2′,3′‐c]phenazin‐11‐amine, but lacking site, hinders desired despite similar energetics. work emphasizes critical role chelation‐mediated interfacial interactions energy alignment effective shuttle molecules unlocking lead‐chelating transporters next‐generation light‐harvesting technologies.

Язык: Английский

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Mapping Binding Sites for Efficient Hole Extraction in Lead Halide Perovskites through Sulfur‐Based Ligand Engineering

Advanced Optical Materials, Год журнала: 2024, Номер unknown

Опубликована: Дек. 16, 2024

Abstract Lead halide perovskite nanocrystals (NCs) rapidly emerge as promising materials for photovoltaics. However, to fully harness their potential, efficient charge extraction is crucial. Despite rapid advancements, the specific active sites where acceptor molecules interact remain inadequately understood. Surface chemistry and interfacial properties are pivotal, they directly impact transfer efficiency overall device performance. This study identifies maps binding hole transporters, examining influence on dynamics through ligand engineering with 2,3‐dimercaptopropanol (DMP), a compound strong affinity lead (Pb). DMP effectively passivates Pb in CsPbBr 3 (CPB) NCs, enhancing photoluminescence (PL) by forming stable chelating bonds. DMP‐modified CPB nearly completely suppresses ─COOH‐functionalized ferrocene (FcA) partially ─NMe 2 ‐functionalized (FcAm), suggesting an alternative pathway FcAm. further supported enhanced bromine‐excess (CPB‐Br(XS)) synthesized via SOBr treatment. The distinct interactions validated steady‐state time‐resolved PL, along transient absorption spectroscopy. These findings underscore role of strategic NC‐charge interactions, enabling better extraction, higher solar cell efficiency, reduced toxicity binding.

Язык: Английский

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Unlocking Enhanced Light Harvesting in Perovskites: A Light‐Mediated Ligand Management Approach

Advanced Optical Materials, Год журнала: 2024, Номер unknown

Опубликована: Сен. 23, 2024

Abstract Interfaces between nanocrystals and their stabilizing ligands in light‐harvesting devices are crucial for mediating energy transfer, essential efficient solar conversion. In metal halide perovskites, a promising material these devices, Förster resonance transfer (FRET) within perovskite/acceptor‐molecule complexes offers pathway optimized transfer. However, traditional methods optimizing FRET perovskite‐chromophore hybrids based on static modifications. This study presents an innovative approach light‐driven dynamic control of FRET, achieving ≈14% enhancement efficiency CsPbBr 3 (CPB NCs) rhodamine B isothiocyanate (RITC) dye. UV light is utilized to reversibly regulate NC‐ligand binding thus the coupling CPB NCs RITC at interface. critically relies strong NC–ligand interactions, such as Pb ─ S bond RITC. Light exposure weakens surface ligands, allowing RITC, with its bond, attach more effectively promote enhanced light‐activated absent Rhodamine (RhB) lacking NCS group, motif. The findings reveal importance interactions dynamically manipulating light. pioneering method nanoscale paves way devices.

Язык: Английский

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