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Exfoliation of layered structures such as MoS2 (exemplified here by layered structure of Antelope Canyon, USA) strongly depends on the intercalator used. As found by M. Pumera and co‐workers on page 605, n‐Bu‐Li and t‐Bu‐Li produce a more efficient exfoliation of MoS2 than Me‐Li. Exfoliation with n‐Bu‐Li and t‐Bu‐Li gives rise to MoS2 sheets more catalytic for the hydrogen evolution reaction than...
Recent years have witnessed increasing interest in the solution‐phase synthesis of atomically precise thiolate‐protected gold clusters (Aux); nonetheless, research on the photocatalytic properties of Aux–semiconductor nanocomposites is still in its infancy. In this work, recently developed glutathione‐capped gold clusters and highly ordered nanoporous layer‐covered TiO2 nanotube arrays (NP‐TNTAs)...
MoS2 and other transition metal dichalcogenides (TMDs) have recently gained a renewed interest due to the interesting electronic, catalytic, and mechanical properties which they possess when down‐sized to single or few layer sheets. Exfoliation of the bulk multilayer structure can be achieved by a preliminary chemical Li intercalation followed by the exfoliation due to the reaction of Li with water...
Materials with mesoscopic structural and electronic phase separation, either inherent from synthesis or created via external means, are known to exhibit functionalities absent in the homogeneous counterparts. One of the most notable examples is the colossal magnetoresistance discovered in mixed‐valence manganites, where the coexistence of nano‐ to micrometer‐sized phase‐separated domains dictates...
The first demonstration of a DNA‐based molecular machine constructed from two DNA origami tiles is presented on page 568. E. Nir and co‐workers connected two tiles to create a track on which a bipedal DNA walker travels back and forth with an operational yield similar to that of a motor striding on a single origami tile. This demonstrates the feasibility of dynamic DNA molecular machines that are...
Structural characterisation of individual molecules by high‐resolution transmission electron microscopy (HRTEM) is fundamentally limited by the element and electron energy‐specific interactions of the material with the high energy electron beam. Here, the key mechanisms controlling the interactions between the e‐beam and C–H bonds, present in all organic molecules, are examined, and the low atomic...
Decreasing the energy of the electron beam in transmission electron microscopy (TEM) improves the stability of inorganic molecules, however, organic molecules become surprisingly less stable under these conditions. On page 622, E. Bichoutskaia, U. Kaiser, A. N. Khlobystov, and co‐workers analyse the interactions of the e‐beam with C–H bonds and are able to highlight the low atomic weight of hydrogen...
Freestanding graphene membranes are unique materials. The combination of atomically thin dimensions, remarkable mechanical robustness, and chemical stability make porous and non‐porous graphene membranes attractive for water purification and various sensing applications. Nanopores in graphene and other 2D materials have been identified as promising devices for next‐generation DNA sequencing based...
In this work, the successful operation of a dynamic DNA device constructed from two DNA origami building blocks is reported. The device includes a bipedal walker that strides back and forth between the two origami tiles. Two different DNA origami tiles are first prepared separately; they are then joined together in a controlled manner by a set of DNA strands to form a stable track in high yield as...
Dip‐pen nanodisplacement lithography (DNL) is a versatile scanning probe‐based technique that can be employed for fabricating ultrafine 3D polymer brushes under ambient conditions. Many fundamental studies and applications require the large‐area fabrication of 3D structures. However, the fabrication throughput and uniformity are still far from satisfactory. In this work, the molecular displacement...
The mode hybridization between adjacent graphene nanoribbons determines the integration density of graphene‐based plasmonic devices. Here, plasmon hybridization in graphene nanostructures is demonstrated through the characterization of the coupling strength of plasmons in graphene nanoribbons as a function of charge density and inter‐ribbon spacing using Fourier transform infrared microscopy. In combination...
By grafting specific response DNA on the interior surface of ion track‐etched conical nanochannels, a highly sensitive and selective ionic gate that can be driven by silver (I) ions is demonstrated. The switches between the OFF‐state and the ON‐state are mainly dependent on silver (I) ions and cysteine. Such a biomimetic nanodevice shows potential for application in sensing, pharmaceuticals, and...
Colloidal pen lithography, a low‐cost, high‐throughput scanning probe contact printing method, has been developed, which is based on self‐assembled colloidal arrays embedded in a soft elastomeric stamp. Patterned protein arrays are demonstrated using this method, with a feature size ranging from 100 nm to several micrometers. A brief study into the specificity reorganization of protein gives evidence...
The initial isolation of graphene in 2004 spawned massive interest in this two‐dimensional pure sp2 carbon structure due to its incredible electrical, optical, mechanical, and thermal effects. This in turn led to the rapid development of various characterization tools for graphene. Examples include Raman spectroscopy and scanning tunneling microscopy. However, the one tool with the greatest prowess...
Silica nanoparticles are imaged in solution with scanning transmission electron microscopy (STEM) using a liquid cell with silicon nitride (SiN) membrane windows. The STEM images reveal that silica structures are deposited in well‐defined patches on the upper SiN membranes upon electron beam irradiation. The thickness of the deposits is linear with the applied electron dose. Scanning electron microscopy...
A highly sensitive and selective bioinspired ionic gate that can be driven by silver (I) ions is reported by L. Wen and co‐workers. This nano‐device, described on page 543, is demonstrated by grafting specific response DNA on the interior surface of ion track‐etched conical nanochannels. The switches between the OFF‐state and the ON‐state are mainly dependent on silver (I) ions and cysteine. Such...
Glutathione‐capped gold clusters and highly ordered nanoporous layer‐covered TiO2 nanotube arrays (NP‐TNTAs) are employed as nanobuilding blocks for a well‐defined Au/NP‐TNTA heterostructure via electrostatic self‐assembly. On page 554, B. Liu and co‐workers show how tailor‐made Au clusters are evenly distributed on the interior and exterior surfaces of the framework. Versatile photocatalytic performances...
Hierarchical polymeric carriers with high encapsulation efficiencies are fabricated via a biocompatible strategy developed using superhydrophobic (SH) surfaces. The carries are obtained by the incorporation of cell/BSA‐loaded dextran–methacrylate (DEXT–MA) microparticles into alginate (ALG) macroscopic beads. Engineered devices like these are expected to boost the development of innovative and customizable...
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