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Conjugated macrocycle polymers (CMPs) integrated using the macrocyclic confinement effect make imposing restrictions feasible on the growth of metal nanoparticles with confined size and high dispersion. For a proof‐of‐concept exploration, a novel nanoscale CMP is reported, denoted as DMP[5]‐TPP‐CMP, comprising two representative types of macrocyclic compounds, i.e., pillararene and porphyrin, as alternating...
Branched nanoparticles are one of the most promising nanoparticle catalysts as their branch sizes and surfaces can be tuned to enable both high activity and stability. Understanding how the crystallinity and surface facets of branched nanoparticles affect their catalytic performance is vital for further catalyst development. In this work, a synthesis is developed to form highly branched ruthenium...
Design and synthesis of new fluorophores with emission in the second near‐infrared window (NIR‐II, 1000–1700 nm) have fueled the advancement of in vivo fluorescence imaging. Organic NIR‐II probes particularly attract tremendous attention due to excellent stability and biocompatibility, which facilitate clinical translation. However, reported organic NIR‐II fluorescent agents often suffer from low...
In article number 1805549, Xiaowei Chen, Jie Liu, Hua Feng, and co‐workers prepare a new aggregation‐induced emission (AIE) luminogen (AIEgen) through molecular engineering by varying a single atom from sulfur to selenium. The resultant AIE nanoparticles have an emission tail extending to 1200 nm with a high quantum yield. The light from these nanoparticles allow for clear vessel imaging.
Nanoparticle (NP) interactions with cells and organisms are mediated by a biomolecular adsorption layer, the so‐called “protein corona.” An in‐depth understanding of the corona is a prerequisite to successful and safe application of NPs in biology and medicine. In this work, earlier in situ investigations on small NPs are extended to large polystyrene (PS) NPs of up to 100 nm diameter, using human...
Bacterial infections are the main cause of chronic infections and even mortality. In fact, due to extensive use of antibiotics and, then, emergence of antibiotic resistance, treatment of such infections by conventional antibiotics has become a major concern worldwide. One of the promising strategies to treat infection diseases is the use of nanomaterials. Among them, mesoporous silica materials (MSMs)...
Dynamic and reconfigurable systems that can sense and react to physical and chemical signals are ubiquitous in nature and are of great interest in diverse areas of science and technology. DNA is a powerful tool for fabricating such smart materials and devices due to its programmable and responsive molecular recognition properties. For the past couple of decades, DNA‐based self‐assembly is actively...
A novel electrochemistry method using stochastic collision of particles at microelectrode to study their performance in single‐particle scale has obtained remarkable development in recent years. This convenient and swift analytical method, which can be called “nanoimpact,” is focused on the electrochemical process of the single particle rather than in complex ensemble systems. Many researchers have...
Metal–organic frameworks (MOFs) are constructed by periodically alternate metal ions with organic ligands, which offer structural diversity and a wide range of interesting properties as an attractive classification of crystalline porous materials. Integration of MOFs with other size‐limited functional centers can supply new multifunctional composites, which exhibit both the properties of the components...
Defined hierarchical materials promise cell analysis and call for application‐driven design in practical use. The further issue is to develop advanced materials and devices for efficient label‐free cell capture with minimum instrumentation. Herein, the design of hierarchical beads is reported for efficient label‐free cell capture. Silica nanoparticles (size of ≈15 nm) are coated onto silica spheres...
In article number 1902441, Kun Qian and co‐workers design hierarchical beads for label‐free cell capture. Silica nanoparticles are coated on silica spheres for surface roughness and then combined with microbeads to assemble hierarchical structures. Functionalized by hyaluronic acid, the hierarchical beads display desirable structural parameters with high cell capture efficiency.
Cell membrane coating has recently emerged as a promising biomimetic approach to engineering nanoparticles (NPs) for targeted drug delivery. However, simple cell membrane coating may not meet the need for efficient drug delivery to the brain. Here, a novel molecular engineering strategy to modify the surface of NPs with a cell membrane coating for enhanced brain penetration is reported. By using poly(lactic‐...
In article number 1902321, Claus Feldmann and co‐workers present the formation of zero‐valent iron nanoparticles (Fe0) by lithium pyridinyl‐driven reduction of FeCl3 (Fe+III) in pyridine and their subsequent use as reactive starting material to obtain FeCp*2 (Fe+II, Cp*: pentamethylcyclopentadienyl). The novel pyridine‐based synthesis of reactive Fe0 nanoparticles as well as further follow‐up reactions...
In article number 1902033, Meritxell B. Cutrona and Jeremy C. Simpson describe a high‐throughput automated confocal microscopy platform which allows for the generation of multiple levels of quantitative information with respect to how nanoparticles interact with cells. These interactions can be measured at the subcellular level, cell spheroid level and spheroid population level.
There is a high demand for advanced, image‐based, automated high‐content screening (HCS) approaches to facilitate phenotypic screening in 3D cell culture models. A major challenge lies in retaining the resolution of fine cellular detail but at the same time imaging multicellular structures at a large scale. In this study, a confocal microscopy‐based HCS platform in optical multiwell plates that enables...
In this Review, an effort is made to discuss the most recent progress and future trend in the two‐way traffic of the interactions between plants and nanoparticles (NPs). One way is the use of plants to synthesize NPs in an environmentally benign manner with a focus on the mechanism and optimization of the synthesis. Another way is the effects of synthetic NPs on plant fate with a focus on the transport...
Robust synthesis of large‐scale self‐assembled nanostructures with long‐range organization and a prominent response to external stimuli is critical to their application in functional plasmonics. Here, the first example of a material made of liquid crystalline nanoparticles which exhibits UV‐light responsive surface plasmon resonance in a condensed state is presented. To obtain the material, metal...
The synthesis of zero‐valent iron (Fe(0)) nanoparticles in pyridine using lithium bipyridinyl ([LiBipy]) or lithium pyridinyl ([LiPy]) is presented. FeCl3 is used as the most simple starting material and reduced either in a [LiBipy]‐driven two‐step approach or in a [LiPy]‐driven one‐pot synthesis. High‐quality nanoparticles are obtained with uniform, spherical shape, and mean diameters of 2.9 ± 0...
Colloidal dispersions of nanomaterials are often polydisperse in size, significantly complicating their characterization. This is particularly true for materials early in their historical development due to synthetic control, dispersion efficiency, and instability during storage. Because a wide range of system properties and technological applications depend on particle dimensions, it remains an important...
Nanoparticles tend to aggregate once integrated into soft matter and consequently, self‐assembling nanoparticles into large‐scale, regular, well‐defined, and ultimately chiral patterns remains an ongoing challenge toward the design and realization of organized superstructures of nanoparticles. The patterns of nanoparticles that are reported in liquid crystals so far are all static, and this lack of...
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