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In article number 1604077, by Ming Li, Yunbin He and co‐workers, demonstrate that hydrogen‐bonding (a weak and reversible interaction) can assemble conjugated polymer chains towards a free‐standing 2D material. The H‐bonding allows further splitting of the material into ribbons, which can re‐assemble, similar to a zipper, leading to the first example of a healable 2D material.
Photodynamic therapy (PDT) based on photosensitizers (PSs) constructed with nanomaterials has become popular in cancer treatment, especially oral carcinoma cell. This therapy is characterized by improved PS accumulation in tumor regions and generation of reactive oxygen species (ROS) for PDT under specific excitation. In the selection of near‐infrared (NIR) window, 808 nm NIR light because it can...
A novel architecture made of a CsPbX3/ZnS quantum dot heterostructure is reported, by Xiaosheng Tang, Miao Zhou, and co‐workers in article number 1604085, by combining material synthesis, characterization, optical measurements and density functional theory based first‐principles calculations. This architecture presents high crystal quality, enhanced structural stability and tunable optoelectronic...
p–n junctions play an important role in modern semiconductor electronics and optoelectronics, and field‐effect transistors are often used for logic circuits. Here, gate‐controlled logic rectifiers and logic optoelectronic devices based on stacked black phosphorus (BP) and tungsten diselenide (WSe2) heterojunctions are reported. The gate‐tunable ambipolar charge carriers in BP and WSe2 enable a flexible,...
A “Polyol” method has granted low‐cost and facile process‐controllability for silver‐nanowire (Ag‐NW) synthesis. Although homogenous and heterogeneous nucleation and growth during Ag‐NW synthesis are possible using polyol methods, heterogeneous nucleation and growth of Ag NW guarantees highly selective growth of nanostructures using silver chloride (AgCl) seeds, which provides a stable source of chloride...
The power conversion efficiency of colloidal PbS‐quantum‐dot (QD)‐based solar cells is significantly hampered by lower‐than‐expected open circuit voltage (VOC). The VOC deficit is considerably higher in QD‐based solar cells compared to other types of existing solar cells due to in‐gap trap‐induced bulk recombination of photogenerated carriers. Here, this study reports a ligand exchange procedure based...
The effects of the growth parameters on the uniformity and the aspect ratio of InN nanowires grown on Si(111) substrates have been studied systematically, and a modified quasi‐equilibrium model is proposed. The growth temperature is of great importance for both the nucleation of the nanowires and the migration of In and N atoms, thus affecting the uniformity of the InN nanowires. In order to improve...
The growth and characterization of an n‐GaP/i‐GaNP/p+‐GaP thin film heterojunction synthesized using a gas‐source molecular beam epitaxy (MBE) method, and its application for efficient solar‐driven water oxidation is reported. The TiO2/Ni passivated n‐GaP/i‐GaNP/p+‐GaP thin film heterojunction provides much higher photoanodic performance in 1 m KOH solution than the TiO2/Ni‐coated n‐GaP substrate,...
Poly(aspartic acid) (pAsp) is known to stabilize amorphous calcium carbonate (ACC) and affect its crystallization pathways. However, little is known about the mechanisms behind these phenomena. Here it is shown that ACC is stabilized by pAsp molecules in the solution rather than by the amount of pAsp incorporated into the ACC bulk, and that the effect of pAsp on the polymorph selection is entirely...
Developing high‐performance but low‐cost hydrogen evolution reaction (HER) electrocatalysts with superior activity and stability for future sustainable energy conversion technologies is highly desired. Tuning of microstructure, configuration, and chemical composition are paramount to developing effective non‐noble electrocatalysts for HER. Herein, a universal “nanocasting” method is reported to construct...
All‐in‐one material for microrocket propulsion featuring acid‐based bubble generation and magnetic guidance is presented. Electrochemically deposited iron serves as both a propellant, toward highly efficient self‐propulsion in acidic environments, and as a magnetic component enabling complete motion control. The new microrockets display longer lifetime and higher propulsion efficiency compared to...
Large‐scale fabrication of organic solar cells requires an active layer with high thickness tolerability and the use of environment‐friendly solvents. Thick films with high‐performance can be achieved via a ternary strategy studied herein. The ternary system consists of one polymer donor, one small molecule donor, and one fullerene acceptor. The small molecule enhances the crystallinity and face‐on...
In many 2D materials reported thus far, the forces confining atoms in a 2D plane are often strong interactions, such as covalent bonding. Herein, the first demonstration that hydrogen (H)‐bonding can be utilized to assemble polydiacetylene (a conductive polymer) toward a 2D material, which is stable enough to be free‐standing, is shown. The 2D material is well characterized by a large number of techniques...
All‐inorganic perovskite CsPbX3 (X = Cl, Br, I) and related materials are promising candidates for potential solar cells, light emitting diodes, and photodetectors. Here, a novel architecture made of CsPbX3/ZnS quantum dot heterodimers synthesized via a facile solution‐phase process is reported. Microscopic measurements show that CsPbX3/ZnS heterodimer has high crystalline quality with enhanced chemical...
Nanostructured metal‐contained catalysts are one of the most widely used types of catalysts applied to facilitate some of sluggish electrochemical reactions. However, the high activity of these catalysts cannot be sustained over a variety of pH ranges. In an effort to develop highly active and stable metal‐contained catalysts, various approaches have been pursued with an emphasis on metal particle...
In article number 1700038, Michael Hsiao, Ru‐Shi Liu, and co‐workers, report an 808 nm near‐infrared‐triggered photodynamic therapy (PDT) strategy using upconversion nanoparticle‐poly‐l‐lysine@graphitic carbon nitride quantum dots (UCNP‐PLL@CNs) nanocomposites. The 808 nm UCNP‐PLL@CNs are expected to make PDT more humane, controllable, and low‐cost, which will inevitably lead to considerable improvements...
Graphene decorated uniform ultrathin (CoP)x−(FeP)1−x nanorods hybrids with different compositions ((CoP)x−(FeP)1−x−NR/G) are rationally designed and synthesized, in article number 1700092, by Jun Zhang and co‐workers. It displays excellent catalytic activity and durability toward HER because of its unique mesoporous structure, excellent electronic transmission performance, and strong synergistic effect...
Developing cost‐effective electrocatalysts with high activity and stability for hydrogen evolution reaction (HER) plays an important role in modern hydrogen economy. Amorphous molybdenum sulfide (MoSx) has recently emerged as one of the most promising alternatives to Pt‐based catalysts in HER, especially in acidic electrolytes. Here this study reports a simple ultrasonic spray pyrolysis method to...
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