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The development of effective approaches for preparing large‐area, self‐standing, ultrathin metal‐based nanosheets, which have proved to be favorable for catalytic applications such as water electrolysis, is highly desirable but remains a great challenge. Reported herein is a simple and versatile strategy to synthesize ultrathin Co3O4 and CoP NSs consisting of close‐packed nanoparticles by pyrolyzing...
The fine control of graphene doping levels over a wide energy range remains a challenging issue for the electronic applications of graphene. Here, the controllable doping of chemical vapor deposited graphene, which provides a wide range of energy levels (shifts up to ± 0.5 eV), is demonstrated through physical contact with chemically versatile graphene oxide (GO) sheets, a 2D dopant that can be solution‐processed...
In article number 1800227, Stefania Sabella, Pier Paolo Pompa and co‐workers analyze the biotransformation and biological interaction of graphene and graphene oxide through an oral ingestion assay simulating chronic exposure. No structural changes/degradation of the nanomaterials are detected during their passage through the gastrointestinal tract, suggesting their biopersistence when administered...
The biotransformation and biological impact of few layer graphene (FLG) and graphene oxide (GO) are studied, following ingestion as exposure route. An in vitro digestion assay based on a standardized operating procedure (SOP) is exploited. The assay simulates the human ingestion of nanomaterials during their dynamic passage through the different environments of the gastrointestinal tract (salivary,...
Graphene oxide (GO)‐based resistive‐switching (RS) memories offer the promise of low‐temperature solution‐processability and high mechanical flexibility, making them ideally suited for future flexible electronic devices. The RS of GO can be recognized as electric‐field‐induced connection/disconnection of nanoscale reduced graphene oxide (RGO) conducting filaments (CFs). Instead of operating an electrical...
In article number 1801325, Haiyang Xu, Yichun Liu, and co‐workers propose a strategy of TiO2‐assisted photocatalytic reduction to generate reduced graphene oxide (RGO)‐domains locally in Al/GO‐TiO2/ITO resistive switching (RS) memory. Such a mild reduction method can effectively eliminate the electrical FORMING process, improve the RS performance and help to maintain the flexibility of the memory...
As soluble catalysts, redox‐mediators (RMs) endow mobility to catalysts for unconstrained access to tethered solid discharge products, lowering the energy barrier for Li2O2 formation/decomposition; however, this desired mobility is accompanied by the undesirable side effect of RM migration to the Li metal anode. The reaction between RMs and Li metal degrades both the Li metal and the RMs, leading...
In article number 1803551, Zhiyang Li, Xuehao Wang, Yuanjin Zhao, and co‐workers present mussel‐inspired photonic crystal (PhC) barcodes with graphene oxide (GO) encapsulation for multiplex miRNA detection. The GO‐based hybridization chain reaction strategy realizes low abundance and high sensitivity miRNA quantification. At the same time, multiplex detection is achieved by employing different GO‐decorated...
Multiplexed microRNA (miRNA) quantification has a demonstrated value in clinical diagnosis. In this paper, novel mussel‐inspired photonic crystal (PhC) barcodes with graphene oxide (GO) encapsulation for multiplexed miRNA detection are presented. Using the excellent adhesion capability of polydopamine, the dispersed GO particles can be immobilized on the surfaces of the PhC barcodes to form an additional...
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