Nanorecycling: Monolithic Integration of Copper and Copper Oxide Nanowire Network Electrode through Selective Reversible Photothermochemical Reduction

Han, Seungyong; Hong, Sukjoon; Yeo, Junyeob; Kim, Dongkwan; Kang, Bongchul; Yang, Min-Yang; Ko, Seung Hwan

doi:10.1002/adma.201503244

Cited by 133 publications

(109 citation statements)

References 27 publications

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“…When applied to dye‐sensitized solar cells (DSSCs), the electrical network (optical path) formed by the Cu NW‐core accelerated electronic transmission and the light propagation, which eventually promoted a power conversion efficiency of 9.44% higher than that of the undoped one . Similar to the effect of the TiO 2 shell, the narrow‐bandgap semiconductor Cu 2 O NPs (bandgap of 2.17 eV) were assembled onto the surface of Cu NW via a facile reduction process . Due to the strong capacity for oxygen activation of Cu NWs and the bandgap‐adjusting effect of Cu 2 O NPs, the obtained Cu–Cu 2 O core–shell NWs (Figure r) showed remarkable enhancement in visible light photocatalytic activity toward the degradation of organic pollutants, including rhodamine B (RhB), methyl orange (MO) and MB …”

Section: G Cu Nws and The Derived Nanostructuresmentioning

confidence: 99%

Nanowire Genome: A Magic Toolbox for 1D Nanostructures

Yang

Liang

et al. 2019

Advanced Materials

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1D nanomaterials with high aspect ratio, i.e., nanowires and nanotubes, have inspired considerable research interest thanks to the fact that exotic physical and chemical properties emerge as their diameters approach or fall into certain length scales, such as the wavelength of light, the mean free path of phonons, the exciton Bohr radius, the critical size of magnetic domains, and the exciton diffusion length. On the basis of their components, aspect ratio, and properties, there may be imperceptible connections among hundreds of nanowires prepared by different strategies. Inspired by the heredity system in life, a new concept termed the “nanowire genome” is introduced here to clarify the relationships between hundreds of nanowires reported previously. As such, this approach will not only improve the tools incorporating the prior nanowires but also help to precisely synthesize new nanowires and even assist in the prediction on the properties of nanowires. Although the road from start‐ups to maturity is long and fraught with challenges, the genetical syntheses of more than 200 kinds of nanostructures stemming from three mother nanowires (Te, Ag, and Cu) are summarized here to demonstrate the nanowire genome as a versatile toolbox. A summary and outlook on future challenges in this field are also presented.

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Section: G Cu Nws and The Derived Nanostructuresmentioning

confidence: 99%

Nanowire Genome: A Magic Toolbox for 1D Nanostructures

Yang

Liang

et al. 2019

Advanced Materials

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“…In order to fabricate a soft conductor, the collected CuNWs are then carefully transferred onto a needed substrate, such as a sheet of PDMS, PU, PI, and poly(styrene-b-butadiene-b-styrene), by a contact transfer under a mild pressure from the filtration membranes [9,95,[100][101][102][103][104]. Sometimes, a heattolerant releasing substrate, such as a glass slide, is used to receive the CuNWs before the eventual transfer to the polymeric substrate [82,100]. The purpose of two-step transfer is to allow the CuNWs thermally annealed in a reducing environment at a high temperature to remove the oxides.…”

Section: Vacuum Assisted Assembly and Transfermentioning

confidence: 99%

Copper nanomaterials and assemblies for soft electronics

Yang

Zhu

2019

Sci. China Mater.

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Soft electronics that can simultaneously offer electronic functions and the capability to be deformed into arbitrary shapes are becoming increasingly important for wearable and bio-implanted applications. The past decade has witnessed tremendous progress in this field with a myriad of achievements in the preparation of soft electronic conductors, semiconductors, and dielectrics. Among these materials, copper-based soft electronic materials have attracted considerable attention for their use in flexible or stretchable electrodes or interconnecting circuits due to their low cost and abundance with excellent optical, electrical and mechanical properties. In this review, we summarize the recent progress on these materials with the detailed discussions of the synthesis of copper nanomaterials, approaches for their assemblies, strategies to resist the ambient corrosion, and their applications in various fields including flexible electrodes, sensors, and other soft devices. We conclude our discussions with perspectives on the remaining challenges to make copper soft conductors available for more widespread applications.

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“…Achieving this requires a TC with high visible optical transmission, very low electrical resistance, but equally important is high reflectance in the infrared region. Recently, a significant amount of work has been performed on transparent heaters using carbon nanotubes, graphene, metal nanowires, or their hybrids . For instance, the pioneering works reported by Ko's group have made significant contribution in developing various high‐performance transparent metal nanowire heaters, even in the stretchable form .…”

Section: Introductionmentioning

confidence: 99%

Structural Optimization of Oxide/Metal/Oxide Transparent Conductors for High‐Performance Low‐Emissivity Heaters

Zhou

et al. 2018

Adv Materials Inter

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on windows for the prevention of radiative heat loss or to control solar gain. [5] An effective TC requires high optical transparency and low electrical resistivity, as well as flexibility and long-term stability. Conventional state-of-the-art TCs are made from wide-bandgap semiconductors, which ensures that the interband transitions occur at higher energy than visible light, with electron concentrations being maximized by doping. [3] Currently, commercially available indium tin oxide (ITO) that has a transmittance over 80% in the visible spectrum and a conductivity above 10 4 S cm −1 is the most widely used TCs. [1] However, ITO requires high processing temperatures (>250 °C), is fragile, and the cost of the raw materials is high. [3] In the last decade, the search for new, flexible TCs has received significant attention. [6] Emerging candidates include conducting polymers, [7] carbon nanotubes, [8] graphene, [9] metal nanomeshes, [10][11][12][13][14][15][16][17][18][19][20] hybrids of various TCs, [21][22][23] and ultrathin metal films. [24] Among them, metal-based TCs, such as metal nanowires [14][15][16][17] or printed metal nanoparticles, [18,19] possess the advantages of high conductivity and mechanical flexibility, lead the way for ITO replacement. However, they still suffer from a number of drawbacks, including high surface roughness and poor stability. Although embedding metal nanowires in polymer [20] or encapsulating metal nanowires with graphene [21] can greatly improve the stability. Until now, it is still a challenge for metal nanowire TCs to establish a desirable balance between optoelectronic performance and stability.The development of ultrathin metal films for insertion between oxide films in oxide/metal/oxide (O/M/O) configurations is regarded as a promising approach to realize highperformance TCs. O/M/O TCs exhibit some highly desirable features, including high stability under ambient atmosphere because the metal film is encapsulated by the oxide films, the ability to undergo deformation due to the ductile metal film, and large-scale, ambient-temperature fabrication on plastic substrates using well-established sputtering or evaporation techniques. More importantly, the optical transmission and reflectance of O/M/O TCs can be modified by varying the thicknesses of the antireflection undercoat and overcoat oxides. [25] Oxide/metal/oxide transparent conductors (TCs) have attracted increasing interest in response to demands of explosively developing flexible optoelectronic devices. Fabricating continuous ultrathin metal films on supporting oxides is an unsolved conundrum due to Volmer-Weber growth. Instead of introducing a nucleation inducer, which generally results in inferior opticalelectrical performances, an oxygen plasma treatment-assisted method is used to prepare Al-doped ZnO/Ag/Al-doped ZnO (AZO/Ag/AZO) TCs. Experimental results evidence that increasing surface energy and adhesion of the supporting AZO film allows the formation of a continuous Ag film as thin as 6 nm. The oxygen plasma tre...

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Nanorecycling: Monolithic Integration of Copper and Copper Oxide Nanowire Network Electrode through Selective Reversible Photothermochemical Reduction

Cited by 133 publications

References 27 publications

Nanowire Genome: A Magic Toolbox for 1D Nanostructures

Nanowire Genome: A Magic Toolbox for 1D Nanostructures

Copper nanomaterials and assemblies for soft electronics

Structural Optimization of Oxide/Metal/Oxide Transparent Conductors for High‐Performance Low‐Emissivity Heaters

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