Journal ArticleDOI
Tailoring the photoluminescence of atomically precise nanoclusters.
Xi Kang,Manzhou Zhu +1 more
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TLDR
Promising applications of metal nanoclusters are reviewed, with particular focus on their potential to impact the fields of chemical sensing, bio-imaging, and bio-labeling, and scope for improvements and future perspectives of these novel nanomaterials are highlighted.Abstract:
Due to their atomically precise structures and intriguing chemical/physical properties, metal nanoclusters are an emerging class of modular nanomaterials. Photo-luminescence (PL) is one of their most fascinating properties, due to the plethora of promising PL-based applications, such as chemical sensing, bio-imaging, cell labeling, phototherapy, drug delivery, and so on. However, the PL of most current nanoclusters is still unsatisfactory-the PL quantum yield (QY) is relatively low (generally lower than 20%), the emission lifetimes are generally in the nanosecond range, and the emitted color is always red (emission wavelengths of above 630 nm). To address these shortcomings, several strategies have been adopted, and are reviewed herein: capped-ligand engineering, metallic kernel alloying, aggregation-induced emission, self-assembly of nanocluster building blocks into cluster-based networks, and adjustments on external environment factors. We further review promising applications of these fluorescent nanoclusters, with particular focus on their potential to impact the fields of chemical sensing, bio-imaging, and bio-labeling. Finally, scope for improvements and future perspectives of these novel nanomaterials are highlighted as well. Our intended audience is the broader scientific community interested in the fluorescence of metal nanoclusters, and our review hopefully opens up new horizons for these scientists to manipulate PL properties of nanoclusters. This review is based on publications available up to December 2018.read more
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Journal ArticleDOI
Alloying dichalcogenolate-protected Ag<sub>21</sub> eight-electron nanoclusters: a DFT investigation
TL;DR: In this article , the effect of doping on optical properties of dichalcogenolato nanoclusters of the type [Ag21{E2P(OR)2}12]- (E = S, Se) was systematically investigated using DFT calculations.
Journal ArticleDOI
Enhanced luminescent performance with surface wrinkled Al-doped ZnO films
TL;DR: Wang et al. as mentioned in this paper proposed a new and simple process for enhancing the photoluminescence (PL) properties of ZnO films, which can provide a larger absorption and luminescence area.
Journal ArticleDOI
Template-assisted alloying of atom-precise silver nanoclusters: a new approach to generate cluster functionality
TL;DR: In this paper , a new synthetic approach of site-specific alloying has been unveiled, by which the neutral CO2 templated Ag20 core is confined through Cu containing two peripheral motif units.
Journal ArticleDOI
Excellent Multiphoton Excitation Fluorescence with Large Multiphoton Absorption Cross Sections of Arginine-Modified Gold Nanoclusters for Bioimaging.
Zhongran Wei,Yatao Pan,Guangjing Hou,Xiaomeng Ran,Zhen Chi,Yulu He,Yanmin Kuang,Xiaojuan Wang,Renming Liu,Lijun Guo +9 more
TL;DR: The introduction of arginine into the capping layer of ATT-Au NCs significantly modifies the electronic structure, the absorption cross sections, and the relaxation dynamics of the lowest excited state, drastically reducing the nonradiative relaxation, suppressing the blinking, and greatly enhancing the fluorescence.
Journal ArticleDOI
Arginine-Modified Fluorescent Gold Nanoclusters for Förster Resonance Energy Transfer with a Hemicyanine Dye: A Biofriendly Approach
Soumyadip Bhunia,Kaustav Gangopadhyay,Ashutosh Ghosh,Sourav Kanti Seth,Rahul Das,Pradipta Purkayastha +5 more
TL;DR: Au NCs are used as energy donors in Forster resonance energy-transfer (FRET) processes as mentioned in this paper, but they are less fluorescent than gold nanoclusters (AuNCs).
References
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Aggregation-Induced Emission: Together We Shine, United We Soar!
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Aggregation-induced emission
TL;DR: In this critical review, recent progress in the area ofAIE research is summarized and typical examples of AIE systems are discussed, from which their structure-property relationships are derived.
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Shape‐Controlled Synthesis of Metal Nanocrystals: Simple Chemistry Meets Complex Physics?
TL;DR: A comprehensive review of current research activities that center on the shape-controlled synthesis of metal nanocrystals, including a brief introduction to nucleation and growth within the context of metal Nanocrystal synthesis, followed by a discussion of the possible shapes that aMetal nanocrystal might take under different conditions.
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Nanostructures in Biodiagnostics
Nathaniel L. Rosi,Chad A. Mirkin +1 more
TL;DR: Nathaniel L. Rosi focuses on the rational assembly of DNA-modified nanostructures into larger-scale materials and their roles in biodiagnostic screening for nucleic acids.