Toward Active-Site Tailoring in Heterogeneous Catalysis by Atomically Precise Metal Nanoclusters with Crystallographic Structures

Chemical Reviews, Journal Year: 2020, Volume and Issue: 121(2), P. 567 - 648

Published: Sept. 17, 2020

Heterogeneous catalysis involves solid-state catalysts, among which metal nanoparticles occupy an important position. Unfortunately, no two from conventional synthesis are the same at atomic level, though such regular can be highly uniform nanometer level (e.g., size distribution ∼5%). In long pursuit of well-defined nanocatalysts, a recent success is atomically precise nanoclusters protected by ligands in range tens to hundreds atoms (equivalently 1–3 nm core diameter). More importantly, have been crystallographically characterized, just like protein structures enzyme catalysis. Such merge features homogeneous catalysts ligand-protected centers) and enzymes protein-encapsulated clusters few bridged ligands). The with their total available constitute new class model hold great promise fundamental research, including dependent activity, control catalytic selectivity structure surface ligands, structure–property relationships atomic-level, insights into molecular activation mechanisms, identification active sites on nanocatalysts. This Review summarizes progress utilization for These nanocluster-based enabled heterogeneous research single-atom single-electron levels. Future efforts expected achieve more exciting understanding tailoring design high activity under mild conditions.

Language: Английский

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Nanocrystal Quantum Dots: From Discovery to Modern Development

ACS Nano, Journal Year: 2021, Volume and Issue: 15(4), P. 6192 - 6210

Published: April 8, 2021

This review traces nanocrystal quantum dot (QD) research from the early discoveries to present day and into future. We describe extensive body of theoretical experimental knowledge that comprises modern science QDs. Indeed, spatial confinement electrons, holes, excitons in nanocrystals, coupled with ability chemical synthesis make complex designed structures, is today enabling multiple applications QD size-tunable electronic optical properties.

Language: Английский

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Nanotechnology based drug delivery system: Current strategies and emerging therapeutic potential for medical science

Journal of Drug Delivery Science and Technology, Journal Year: 2021, Volume and Issue: 63, P. 102487 - 102487

Published: April 19, 2021

Language: Английский

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Rare-earth-containing perovskite nanomaterials: design, synthesis, properties and applications

Chemical Society Reviews, Journal Year: 2020, Volume and Issue: 49(4), P. 1109 - 1143

Published: Jan. 1, 2020

As star material, perovskites have been widely used in the fields of optics, photovoltaics, electronics, magnetics, catalysis, sensing, etc. However, some inherent shortcomings, such as low efficiency (power conversion efficiency, external quantum etc.) and poor stability (against water, oxygen, ultraviolet light, etc.), limit their practical applications. Downsizing materials into nanostructures incorporating rare earth (RE) ions are effective means to improve properties broaden This review will systematically summarize key points design, synthesis, property improvements application expansion RE-containing (including both RE-based RE-doped) halide oxide perovskite nanomaterials (PNMs). The critical factors RE elements different structures rational design functional be discussed detail. advantages disadvantages synthesis methods for PNMs reviewed. paper also experiences selecting suitable designing multi-functional according mechanisms principles REs promoting perovskites. At end this review, we provide an outlook on opportunities challenges various fields.

Language: Английский

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Colloidal Self-Assembly Approaches to Smart Nanostructured Materials

Chemical Reviews, Journal Year: 2021, Volume and Issue: 122(5), P. 4976 - 5067

Published: Nov. 8, 2021

Colloidal self-assembly refers to a solution-processed assembly of nanometer-/micrometer-sized, well-dispersed particles into secondary structures, whose collective properties are controlled by not only nanoparticle property but also the superstructure symmetry, orientation, phase, and dimension. This combination characteristics makes colloidal superstructures highly susceptible remote stimuli or local environmental changes, representing prominent platform for developing stimuli-responsive materials smart devices. Chemists achieving even more delicate control over their active responses various practical stimuli, setting stage ready fully exploiting potential this unique set materials. review addresses colloids nanostructured We first delineate driven forces different length scales. A concepts equations outlined controlling crystal growth, appreciating importance particle connectivity in creating responsive superstructures. then present working mechanisms strategies engineering assemblies. The underpinning separation systematically introduced, allowing tuning precise prediction response external stimuli. Various exciting applications these summarized with specific focus on structure-property correlation functional conclude summary existing challenges provide perspective further advances next generation.

Language: Английский

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The Critical Impacts of Ligands on Heterogeneous Nanocatalysis: A Review

ACS Catalysis, Journal Year: 2021, Volume and Issue: 11(10), P. 6020 - 6058

Published: May 4, 2021

Ligand utilization is a necessary and powerful technique for the colloidal synthesis of nanoparticles (NPs) with controllable sizes regulated morphologies. For catalysis applications, it commonly believed that surface ligands on metal NPs block active catalytic sites reduce activity. Nevertheless, since 2010, an increasing number research groups have demonstrated unexpected benefits improve activity and/or selectivity. These can be ascribed to construction inorganic–organic interface, through which series factors, such as steric, electronic, solubility effects, utilized produce favorable changes interfacial environment. Considering tremendous developments in this emerging field, compile comprehensive systematic overview recent advances. In Review, we summarize critical impacts heterogeneous nanocatalysis. First, introduce vital roles colloid syntheses shapes. Second, detrimental effects nanocatalysis are described basis traditional views. Third, strategies ligand removal reviewed compared. Fourth, has been conducted past decade, three main beneficial (steric, solubility) classified discussed. each effect, possible corresponding mechanism presented, typical examples provided. Recent advances regarding density functional theory (DFT) calculations regulation coverage dedicated explaining ligand-promotion searching optimal nanocatalysts. Fifth, stabilities cutting-edge ligand-capped nanocatalysts before after reactions Finally, highlight remaining challenges propose future perspectives. Although much progress achieved, activities multifaceted still debatable. We hope Review will deepen readers' understanding actual catalysis.

Language: Английский

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Hemicyanine‐Based Near‐Infrared Activatable Probes for Imaging and Diagnosis of Diseases

Angewandte Chemie International Edition, Journal Year: 2021, Volume and Issue: 60(51), P. 26454 - 26475

Published: July 15, 2021

Molecular activatable probes with near-infrared (NIR) fluorescence play a critical role in vivo imaging of biomarkers for drug screening and disease diagnosis. With structural diversity high quantum yields, hemicyanine dyes have emerged as versatile scaffold the construction optical probes. This Review presents survey hemicyanine-based NIR (HNAPs) early diagnosis diseases. The molecular design principles HNAPs towards signaling against various are discussed focus on their broad applications detection diseases including inflammation, acute organ failure, skin diseases, intestinal cancer. progress not only proves unique value preclinical research but also highlights translational potential clinical

Language: Английский

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Application of Nanostructured TiO₂ in UV Photodetectors: A Review

Advanced Materials, Journal Year: 2022, Volume and Issue: 34(28)

Published: Jan. 21, 2022

As a wide-bandgap semiconductor material, titanium dioxide (TiO2 ), which possesses three crystal polymorphs (i.e., rutile, anatase, and brookite), has gained tremendous attention as cutting-edge material for application in the environment energy fields. Based on strong attractiveness from its advantages such high stability, excellent photoelectric properties, low-cost fabrication, construction of high-performance photodetectors (PDs) based TiO2 nanostructures is being extensively developed. An elaborate microtopography device configuration most widely used strategy to achieve efficient -based PDs with performances; however, deep understanding all key parameters that influence behavior photon-generated carriers, also highly required improved performances, well their ultimate functional applications. Herein, an in-depth illustration electrical optical properties addition advances technological issues preparation, microdefects, p-type doping, bandgap engineering, heterojunctions, applications are presented. Finally, future outlook PDs, particularly further provided. This work will systematically illustrate fundamentals shed light preparation more heterojunctions

Language: Английский

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Inorganic nanoparticles in clinical trials and translations

Nano Today, Journal Year: 2020, Volume and Issue: 35, P. 100972 - 100972

Published: Sept. 25, 2020

Language: Английский

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Hyaluronic acid and albumin based nanoparticles for drug delivery

Journal of Controlled Release, Journal Year: 2021, Volume and Issue: 331, P. 416 - 433

Published: Jan. 24, 2021

Language: Английский

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