Atomically Engineered Trimetallic Nanoclusters Toward Enhanced Photoluminescence and Photoinitiation Activity

Advanced Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 13, 2025

Abstract Precise doping is of vital significance for atomic engineering and the establishment structure‐property relationships in nanocluster (NC) chemistry. Herein, two novel trimetallic MAu 18 Cd 3 (M = Pd/Pt) NCs that are derived from M‐doped Au 25 templates 24 reported, which central M atom surface‐motif atoms concurrently achieved. Compared to original templates, Cd‐induced surface enhances rigidity structural framework enlarges HOMO‐LUMO gaps , significantly improving photoluminescent efficiency by suppressing nonradiative relaxation. The critical role (Pd/Pt) dopant photoluminescence, regulates rate radiative decay excited‐state electrons, has also been substantiated. More notably, doped case PtAu exhibits excellent photoinitiation activity 3D two‐photon printing with a high resolution ≈140 nm, may be attributed prolonged excited state. Overall, this work provides generalized routine precise synthesis multi‐metal concurrent enhancements photoluminescence activity, expected stimulate further research design preparation multi‐functional, NCs.

Language: Английский

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Generalizable Organic-to-Aqueous Phase Transfer of a Au₁₈ Nanocluster with Luminescence Enhancement and Robust Photocatalysis in Water

ACS Nano, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 28, 2025

For the majority of gold nanoclusters (NCs), their water insolubility, low photoluminescence (PL) intensity, and less understood photostability are three critical factors that limit application in biomedical photocatalysis fields. In this study, we report a polymer wrapping method for phase transfer organic soluble NCs into aqueous without degrading electronic optical properties, such materials further demonstrated robust water. We first synthesized Au18(DMBT)14 NC (DMBT = 2,4-dimethylbenzenethiolate) found aromatic ligands confer greatly enhanced antioxidation capability compared to Au18(CHT)14 counterpart (CHT cyclohexanethiolate), with role ligand interactions identified by X-ray crystallography. The was successfully transferred an amphiphilic (Pluronic F127, abbrev. F127) method, producing Au18-D@F127 nanoparticles [each containing few NCs; Au18-D is abbreviation Au18(DMBT)14] 10-fold enhancement PL similar results were also obtained Au18(CHT)14. This broadly applicable various NCs, rendering solubility significantly enhancing intensity otherwise weakly emissive NCs. exceptional stability enables NPs photocatalytic activation persulfate ions subsequent photodegradation pollutants efficiently.

Language: Английский

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Bioinspired Nanoscale 3D Printing of Calcium Phosphates Using Bone Prenucleation Clusters

Advanced Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 28, 2025

Abstract Calcium phosphates (CaPs) are ubiquitous in biological structures, such as vertebrate bones and teeth, have been widely used biomedical applications. However, fabricating CaPs at the nanoscale 3D has remained a significant challenge, particularly due to limitations current nanofabrication techniques, two‐photon polymerization (2pp), which not applicable for creating CaP nanostructures. In this study, novel approach is presented print structures with unprecedented resolution of ≈300 nm precision, achieving level detail three orders magnitude finer than any existing additive manufacturing techniques CaPs. This advancement achieved by leveraging bioinspired chemistry, utilizing bone prenucleation nanoclusters (PNCs, average size 5 nm), within photosensitive resin. These form highly transparent photoresist, overcoming light‐scattering typically associated larger calcium phosphate‐based nanoparticles. method only allows nanopatterning on diverse substrates, but also enables precise control microstructure down submicron grains. The paves way developing metamaterials, lightweight damage‐tolerant materials, cell‐modulating interfaces, precision‐engineered coatings.

Language: Английский

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Multifunctional Photobleaching Visible Radical/Cationic Photoinitiators Based on 5-Membered Aromatic Heterocyclic-Bis-Chalcone-Oxime Esters

ACS Applied Polymer Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 23, 2024

Language: Английский

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