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Materials made by directed self‐assembly of colloids can exhibit a rich spectrum of optical phenomena, including photonic bandgaps, coherent scattering, collective plasmonic resonance, and wave guiding. The assembly of colloidal particles with spatial selectivity is critical for studying these phenomena and for practical device fabrication. While there are well‐established techniques for patterning...
The zebrafish embryo is a vertebrate well suited for visualizing nanoparticles at high resolution in live animals. Its optical transparency and genetic versatility allow noninvasive, real‐time observations of vascular flow of nanoparticles and their interactions with cells throughout the body. As a consequence, this system enables the acquisition of quantitative data that are difficult to obtain in...
In article number 1905987, Na Liu and co‐workers demonstrate the hierarchical assembly of DNA origami catenanes templated by gold nanoparticles. Catenanes containing two, three and four rings are successfully created. By releasing the gold nanoparticles, the rings within the origami catenanes can be set free. This work will enrich the toolbox of DNA‐based functional nanodevices with programmable and...
Nanocomposite materials benefit from the diverse physicochemical properties featured by nanoparticles, and the presence of nanoparticle concentration gradients can lend functions to macroscopic materials beyond the realm of classical nanocomposites. It is shown here that linearity and time‐shift invariance obtained via the synergism of two independent physical phenomena—translational self‐diffusion...
There is a crucial need for effective and easily dispersible colloidal microsensors able to detect local pH changes before irreversible damages caused by demineralization, corrosion, or biofilms occur. One class of such microsensors is based on molecular dyes encapsulated or dispersed either in polymer matrices or in liquid systems exhibiting different colors upon pH variations. They are efficient...
Mechanically interlocked molecules have marked a breakthrough in the field of topological chemistry and boosted the vigorous development of molecular machinery. As an archetypal example of the interlocked molecules, catenanes comprise macrocycles that are threaded through one another like links in a chain. Inspired by the transition metal–templated approach of catenanes synthesis, the hierarchical...
Microfluidics offer a versatile toolbox in the development of nano/micro‐systems. These systems have a wide application in drug delivery, e.g., single cell analyses, and as simpler models of complex cellular structures. In article number 1904673, Hélder A. Santos and co‐workers provide a mechanistic guide for microfluidics, together with selected applications.
In the past two decades, microfluidics‐based particle production is widely applied for multiple biological usages. Compared to conventional bulk methods, microfluidic‐assisted particle production shows significant advantages, such as narrower particle size distribution, higher reproducibility, improved encapsulation efficiency, and enhanced scaling‐up potency. Herein, an overview of the recent progress...
As nanomaterials (NMs) possess attractive physicochemical properties that are strongly related to their specific sizes and morphologies, they are becoming one of the most desirable components in the fields of drug delivery, biosensing, bioimaging, and tissue engineering. By choosing an appropriate methodology that allows for accurate control over the reaction conditions, not only can NMs with high...
In article number 1906735, Kai Yuan, Yiwang Chen, and co‐workers develop a hollow carbon nanotube integrating single atomic cobalt sites and Co9S8 nanoparticles as an efficient trifunctional electrocatalyst for the oxygen reduction reaction, oxygen evolution reaction, and hydrogen evolution reaction. These reactions are accompanied by the adsorption and generation of molecules like the colorful fish...
The development of rechargeable metal–air batteries and water electrolyzers are highly constrained by electrocatalysts for the oxygen reduction reaction (ORR), oxygen evolution reaction (OER), and hydrogen evolution reaction (HER). However, the construction of efficient trifunctional electrocatalysts for ORR/OER/HER are highly desirable yet challenging. Herein, hollow carbon nanotubes integrated single...
Liquid metals are emerging as fluidic inorganic materials in various research fields. Micro‐ and nanoparticles of Ga and its alloys have received particular attention in the last decade due to their non toxicity and accessibility in ambient conditions as well as their interesting chemical, physical, mechanical, and electrical properties. Unique features such as a fluidic nature and self‐passivating...
Epithelial–mesenchymal transition (EMT) is a primary mechanism for cancer metastasis. Detecting the activation of EMT can potentially convey signs of metastasis to guide treatment management and improve patient survival. One of the classic signatures of EMT is characterized by dynamic changes in cellular expression levels of E‐cadherin and N‐cadherin, whose soluble active fragments have recently been...
Their unique material characteristics, i.e. high crystallinity, strong magnetization, uniform shape and size, and the ability to engineer the enveloping membrane in vivo make bacterial magnetosomes highly interesting for many biomedical and biotechnological applications. In this study, a versatile toolkit is developed for the multifunctionalization of magnetic nanoparticles in the magnetotactic bacterium...
In article number 1906936, Ov D. Slayden, Oleh Taratula, and co‐workers present a nanomedicine approach for endometriosis treatment. Photo‐responsive nanoparticles concurrently delineate and ablate endometriosis tissue xenografts in mice employing real‐time fluorescence imaging and photothermal therapy. Following intravenous injection, nanoparticles activate their fluorescence in endometriotic lesions...
Endometriosis is a painful disorder where endometrium‐like tissue forms lesions outside of the uterine cavity. Intraoperative identification and removal of these lesions are difficult. This study presents a nanoplatform that concurrently delineates and ablates endometriosis tissues using real‐time near‐infrared (NIR) fluorescence and photothermal therapy (PTT). The nanoplatform consists of a dye,...
Development of molecular probes holds great promise for early diagnosis of aggressive prostate cancer. Here, 2‐[3‐(1,3‐dicarboxypropyl) ureido] pentanedioic acid (DUPA)‐conjugated ligand and bis‐isoindigo‐based polymer (BTII) are synthesized to formulate semiconducting polymer nanoparticles (BTII‐DUPA SPN) as a prostate‐specific membrane antigen (PSMA)‐targeted probe for prostate cancer imaging in...
In article number 2000528, André E. Nel, Tian Xia, and co‐workers show how metal‐based nanoparticles are taken up by liver cells including Kupffer cells and hepatocytes, where they induce tiered oxidative stress responses including mitochondrial reactive oxygen species generation, glutathione depletion, expression of phase II enzymes such as HO‐1, production of pro‐inflammatory cytokines including...
The pathogenicity and antimicrobial properties of engineered nanomaterials (ENMs) are relatively well studied. However, less is known regarding the interactions of ENMs and agriculturally beneficial microorganisms that affect food security. Nanoceria (CeO2 nanoparticles (NPs)), multiwall carbon nanotubes (MWCNTs), graphene nanoplatelets (GNPs), and carbon black (CB) have been previously shown to inhibit...
Nanomaterials (NMs) are promptly coated with biomolecules in biological systems leading to the formation of the so‐called corona. To date, research has predominantly focused on the protein corona and how it affects NM uptake, distribution, and bioactivity by conferring a biological identity to NMs enabling interactions with receptors to mediate cellular responses. Thus, protein corona studies are...
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