Nanoscale Horizons, Год журнала: 2023, Номер 8(8), С. 991 - 1013
Опубликована: Янв. 1, 2023
When plasmonic metal nanoparticles become smaller and smaller, a new class of nanomaterials—metal nanoclusters atomic precision—comes to light, recently shape control at the level for functionality has an attractive topic.
Язык: Английский
Science, Год журнала: 2024, Номер 383(6680), С. 326 - 330
Опубликована: Янв. 18, 2024
Metal nanoclusters have emerged as promising near-infrared (NIR)-emissive materials, but their room-temperature photoluminescence quantum yield (PLQY), especially in solution, is often low (<10%). We studied the photophysics of Au
Язык: Английский
Процитировано
133
Science Advances, Год журнала: 2023, Номер 9(13)
Опубликована: Март 31, 2023
Intrinsic dual-emission (DE) of gold nanoclusters in the near-infrared (NIR) are fascinating for fundamental importance and practical applications, but their synthesis remains a formidable challenge sophisticated excited-state processes make elucidating DE mechanisms much more arduous. Here, we report an all-alkynyl-protected nanocluster, Au20, showing prolate Au12 tri-octahedral kernel surrounded by two Au2(CZ-PrA)3 dimers, four Au(CZ-PrA)2 monomers, CZ-PrA- bridges. Au20 exhibits distinguished photophysical properties including NIR at 820 940 nm, microsecond radiative relaxation, 6.26% photoluminescent quantum yield ambient environment nondegassed solution. Combining systematic studies on steady/transient spectroscopy theoretical calculation, identified triplet charge transfer (CT) states, ligand-to-kernel kernel-based CT states as origins. Furthermore, this highly independent sensitive response to surrounding environments, which well coincide with its mechanism. This work not only provides substantial structure model understand distinctive mechanism also motivates further development materials.
Язык: Английский
Процитировано
73
Advanced Materials, Год журнала: 2023, Номер 36(8)
Опубликована: Ноя. 3, 2023
Abstract Atomically precise gold nanoclusters (NCs) have emerged as a new class of precision materials and attracted wide interest in recent years. One the unique properties such pertains to their photoluminescence (PL), for it can widely span visible near‐infrared–I –II wavelengths (NIR‐I/II), even beyond 1700 nm by manipulating size, structure, composition. The current research efforts focus on structure–PL correlation development strategies raising PL quantum yields, which is nontrivial when moving from near‐infrared wavelengths, especially NIR–II regions. This review summarizes progress field, including i) types observed NCs fluorescence, phosphorescence, thermally activated delayed well dual emission; ii) some effective that are devised improve yield (QY) NCs, heterometal doping, surface rigidification, core phonon engineering, with double‐digit QYs NIR horizons; iii) applications luminescent bioimaging, photosensitization, optoelectronics. Finally, remaining challenges opportunities future highlighted.
Язык: Английский
Процитировано
53
Nature Communications, Год журнала: 2025, Номер 16(1)
Опубликована: Янв. 11, 2025
Abstract Photoluminescence is one of the most intriguing properties metal nanoclusters derived from their molecular-like electronic structure, however, achieving high photoluminescence quantum yield (PLQY) core-dictated fluorescence remains a formidable challenge. Here, we report efficient suppression total structural vibrations and rotations, management pathways rates electron transfer dynamics to boost near-unity absolute PLQY, by decorating progressive addition cations. Specifically, with sequential Zn 2+ , Ag + Tb 3+ into 3-mercaptopropionic acids capped Au (NCs), low-frequency vibration core progressively decreases 144.0, 55.2 40.0 cm −1 coupling strength electrons-high-frequency related surface motifs gradually diminishes 40.2, 30.5 14.4 meV. Moreover, introducing cation additives significantly reduces time 40, 27 12 ps in pathway staple core. This benefits shrinkage structure that speeds up shell-core transition, particular, provides hopping platform for excited electrons as intrinsic ladder-like energy level structure. As result, it allows remarkable enhancement 51.2%, 83.4%, 99.5%.
Язык: Английский
Процитировано
3
Sensors and Actuators B Chemical, Год журнала: 2023, Номер 385, С. 133695 - 133695
Опубликована: Март 22, 2023
Язык: Английский
Процитировано
36
Advanced Materials, Год журнала: 2023, Номер 35(40)
Опубликована: Июль 29, 2023
Bacterial keratitis is a serious ocular disease that affects millions of people worldwide each year, among which ≈25% are caused by Staphylococcus aureus. With the spread bacterial resistance, refractory methicillin-resistant S. aureus (MRSA) ≈120 000-190 000 annually and significant cause infectious blindness. Atomically precise gold nanoclusters (GNCs) recently emerged as promising antibacterial agents; although how GNC structure capping ligands control properties remains largely unexplored. In this study, adjusting ratio "bulky" thiol fragrance to linear zwitterionic ligand, conformation transformed from Au25 (SR)18 Au23 (SR)16 species, simultaneously converting both inactive into potent nanomaterials. Surprisingly, mixed-ligand capped GNCs exhibit superior potency compared their monoligand counterparts. The optimal highly against MRSA, showing >1024-fold lower minimum inhibitory concentration than corresponding free ligands. Moreover, it displays excellent in treating MRSA-induced mice with greatly accelerated corneal recovery (by approximately ninefold). Thus, study establishes feasible method synthesize ligand active non-antibacterial ligands, thereby increasing repertoires for combating multidrug-resistant infections.
Язык: Английский
Процитировано
30
Materials Chemistry Frontiers, Год журнала: 2023, Номер 7(8), С. 1482 - 1495
Опубликована: Янв. 1, 2023
Alkynyl-protected metal nanoclusters possess unique advantages, and the recent progress on controllable synthesis CO 2 electroreduction application is discussed, with some explicit examples to elaborate structure-performance relationship.
Язык: Английский
Процитировано
29
Progress in Materials Science, Год журнала: 2023, Номер 142, С. 101229 - 101229
Опубликована: Дек. 12, 2023
Gold nanomaterials have emerged as versatile systems which hold a great promise for several biomedical applications. Among them, gold nanoclusters (AuNCs), ultra-small nanoparticles, gained attention due to their unique optical and electronic properties arising from small size, quantum confinement effects, surface ligands. Their biocompatibility, efficient renal clearance, photoluminescence (PL), catalytic activity make them candidates practical applications, such bioimaging therapy. In this review, we devote our the burgeoning research in area focusing on three main highly intertwined topics. First, present different methods AuNC synthesis alongside key of AuNCs (magnetism, PL). This is followed by description how fine-tune PL property. Lastly, potential applications are discussed detail, with particular focus sensing, bioimaging, nanomedicine.
Язык: Английский
Процитировано
27
Journal of the American Chemical Society, Год журнала: 2024, Номер 146(14), С. 9631 - 9639
Опубликована: Март 26, 2024
The induced structural transformation provides an efficient way to precisely modulate the fine structures and corresponding performance of gold nanoclusters, thus constituting one important research topics in cluster chemistry. However, driving forces mechanisms these processes are still ambiguous many cases, limiting further applications. In this work, based on unique coordination mode pincer ligand-stabilized nanocluster Au8(PNP)4, we revealed site-recognition mechanism for transformations nanoclusters. "open nitrogen sites" surface interact with different inducers including organic compounds metals trigger conversion Au8(PNP)4 Au13 Au9Ag4 respectively. Control experiments verified mechanism, femtosecond nanosecond transient absorption spectroscopy electronic photoluminescent evolution accompanied by transformation.
Язык: Английский
Процитировано
16
Proceedings of the National Academy of Sciences, Год журнала: 2024, Номер 121(10)
Опубликована: Фев. 27, 2024
Atomically precise control over anisotropic nanoclusters constitutes a grand challenge in nanoscience. In this work, we report our success achieving periodic series of atomically gold quantum rods (abbrev. Au QRs) with unusual excitonic properties. These QRs possess hexagonal close-packed kernels constant three-atom diameter but increasing aspect ratios (ARs) from 6.3 to 18.7, all being protected by the same thiolate (SR) ligand. The are
Язык: Английский
Процитировано
14