Two-dimensional(2D)semiconducting materials are poised to revolutionize ultrathin,high-performance optoelectronic *** particular,transition-metal dichalcogenides(TMDs)are well-suited for applications requiring robust ...
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Two-dimensional(2D)semiconducting materials are poised to revolutionize ultrathin,high-performance optoelectronic *** particular,transition-metal dichalcogenides(TMDs)are well-suited for applications requiring robust and stable materials such as electrocatalytic,photocatalytic,and photo-electrochemical *** of the most compelling assets of these materials is the ability to produce and process 2D TMDs in the nanosheet form using solution-based(SB)exfoliation *** to other methods,SB techniques are typically inexpensive,efficient,and more suitable for scale-up and industrial *** acknowledgment of the importance of this area,much work has been done to develop various SB methods starting from the exfoliation of bulk crystalline TMD materials to the chemical modification of final devices consisting of thin films of semiconducting 2D TMD ***,not all SB methods are equally compatible or interchangeable,and they result in very diverse material and device ***,the aim of this Account is to provide an overview of the developed SB techniques that can serve as a guide for assembling high-performance thin films of 2D *** start by introducing the most popular methods for producing 2D TMDs using liquid-phase exfoliation(LPE),discussing their working mechanisms as well as their advantages and *** we highlight a recently developed LPE technique using electro-intercalation that draws on the advantages of previously presented ***,we discuss processing the as-produced 2D TMD nanosheets via SB separating techniques designed for size and morphology selection while also presenting the ongoing challenges in this *** then examine SB methods for processing the selected 2D nanomaterial dispersions into semiconducting thin *** methods are compared and contrasted,and special attention is paid to a recently developed method that carefully deposits 2D TMD nanoflakes with preferentia
Structural color from artificial structures,due to its environmental friendliness and excellent durability,represents a route for color printing *** various physical mechanisms,the Fabry–Perot(F–P)cavity effect prov...
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Structural color from artificial structures,due to its environmental friendliness and excellent durability,represents a route for color printing *** various physical mechanisms,the Fabry–Perot(F–P)cavity effect provides a powerful way to generate vivid colors in either the reflection or transmission *** of the previous F–P type color printing works rely on electron beam grayscale lithography,however,with this technique it is challenging to make large-area and low-cost *** circumvent this constraint,we propose to fabricate the F–P type color printing device by the laser grayscale lithography *** F–P cavity consists of two thin silver films as mirrors and a photoresist film with a spatially variant thickness as the spacer *** controlling the laser exposure dose pixel by pixel,a centimeter-scale fullcolor printing device with a spatial resolution up to 5μm×5μm is *** proposed large area color printing device may have great potential in practical application areas such as color displays,hyperspectral imaging,advanced painting,and so on.
There is currently a strong demand for flexible energy storage devices,based on supercapacitors,to meet the various requirements of modern *** free-standing graphene thinfilm(We also called it graphene paper(GP)),cha...
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There is currently a strong demand for flexible energy storage devices,based on supercapacitors,to meet the various requirements of modern *** free-standing graphene thin film(We also called it graphene paper(GP)),characterized by their light weight and high conductivity,have been regarded as an ideal flexible electrode material for *** approaches,such as direct chemical vapor deposition and flow-directed filtration,have been employed to obtain ***,these methods would suffer from the limits of tedious procedures or special ***’s not suitable for large-scale ***,GP have been prepared by a simple electrochemical method applying positive and negative pulse electric signal,followed by air drying and being peeled off from the *** this process,the alternation signal of positive and negative leads to the synchronization of formation and reduction for GO *** method in our work is simple and easy to scale *** obtained is freestanding and highly flexible[Fig.1(a)].The size of such a paper can be precisely controlled by the effective area of the *** served as a flexible electrode material has exhibits good capacitive performance[Fig.1(b)].This approach opens up the possibility for fabrication of high-performance flexible electrode materials.
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