Effects of length dispersity and film fabrication on the sheet resistance of copper nanowire transparent conductors

Borchert, James W.; Stewart, Ian; Ye, Shengrong; Rathmell, Aaron R.; Wiley, Benjamin J.; Winey, Karen I.

doi:10.1039/c5nr03671b

Cited by 39 publications

(38 citation statements)

References 25 publications

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“…We have dubbed these Fluted Nanowires (FNW). The deposition of nanowires and nanotubes consisting of iron group elements and alloys has been previously observed, [2][3][4]10,11,[13][14][15][16] with previous studies noting a critical voltage threshold dividing deposition into two separate dominant growth regimes: nanowire at low overpotentials and nanotube at high overpotentials, 23 but to our knowledge there is no literature on the mechanisms that produce FNWs.…”

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confidence: 95%

Nanowire formation is preceded by nanotube growth in templated electrodeposition of cobalt hybrid nanostructures

2016

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Cobalt fluted nanowires, novel nanostructures with a diameter of 200 nm consisting of a solid nanowire base and a thin, nanotubular flute shape, were grown in track-etched polycarbonate membranes via templated electrodeposition. The structures were characterized electrochemically via cyclic voltammetry, chronoamperometry, and charge stripping, and structurally via SEM, TEM, and focused ion beam cross-sectioning. Electrochemical and structural analysis reveals details of their deposition kinetics, structure, and morphology, and indicate possible mechanisms for their formation and control. These unique structures provide inspiration for an array of possible applications in electronics, photonics, and other fields.

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confidence: 95%

Nanowire formation is preceded by nanotube growth in templated electrodeposition of cobalt hybrid nanostructures

2016

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“…Based on previous studies of the effect of aspect ratio on conductivity of nanowire networks,[11e,12a,c,19] we expected that metal NWs with higher aspect ratios would result in a more conductive filament at a lower volume percent of filler. To test this hypothesis, we created nanowire‐PCL composites with 3–25 vol% loading of 30 and 50‐µm‐long Cu‐Ag NWs, 3–22 vol% 10 µm Ag flakes, and 3–22 vol% of 20‐µm‐long Ag NWs (see the Experimental Section for a detailed description of the Ag NW synthesis).…”

Section: Resultsmentioning

confidence: 99%

Multigram Synthesis of Cu‐Ag Core–Shell Nanowires Enables the Production of a Highly Conductive Polymer Filament for 3D Printing Electronics

Cruz

Kim

et al. 2018

Part & Part Syst Charact

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This article reports a synthesis that yields 4.4 g of Cu nanowires in 1 h, and a method to coat 22 g of Cu nanowires with Ag within 1 h. Due to the large diameters of Cu nanowires (≈240 nm) produced by this synthesis, a Ag:Cu mol ratio of 0.04 is sufficient to coat the nanowires with ≈3 nm of Ag, and thereby protect them from oxidation. This multigram Cu‐Ag core–shell nanowire production process enabled the production of the first nanowire‐based conductive polymer composite filament for 3D printing. The 3D printing filament has a resistivity of 0.002 Ω cm, >100 times more conductive than commercially available graphene‐based 3D printing filaments. The conductivity of composites containing 5 vol% of 50‐µm‐long Cu‐Ag nanowires is greater than composites containing 22 vol% of 20‐µm‐long Ag nanowires or 10‐µm‐long flakes, indicating that high‐aspect ratio Cu‐Ag nanowires enable the production of highly conductive composites at relatively low volume fractions. The highly conductive filament can support current densities between 2.5 and 4.5 × 105 A m−2 depending on the surface‐to‐volume ratio of the printed trace, and was used to 3D print a conductive coil for wireless power transfer.

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“…Borchert et al 120 compared the sheet resistance of Cu NW¯lms on PET underwent various posttreatments. The Cu NW¯lms with no post-treatment are very highly insulating due to poor electrical contact primarily from the Cu x O present on the NWs.…”

Section: Other Waysmentioning

confidence: 99%

Review on the Synthesis and Antioxidation of Cu Nanowires for Transparent Conductive Electrodes

Chao

Yuan

Liu

et al. 2019

NANO

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Transparent conducting films based on solution-synthesized copper nanowires (Cu NWs) are considered to be an attractive alternative to indium tin oxide (ITO) due to the relative abundance of Cu and the low cost of solution-phase NW coating processes. Moreover, transparent electrodes tend to be flexible. This makes Cu NWs more attractive because ITO is brittle and can not meet the requirements of flexibility. For Cu NWs, aspect ratio is an important property. Cu NWs can be directly prepared by chemical reduction with various reducing agents and suitable capping agents. In general, the selectivity of the capping agent is very important for the formation of one-dimensional nanostructures because it plays a major role in the thermodynamic regulations and growth kinetics that influence the geometry and morphology of the crystal facets. Therefore, different aspect ratios are formed. Conductivity is the most important property for transparent electrodes. Organic pickling, annealing and glare pulses have a certain improvement in conductivity. Meanwhile, it is also essential to increase the oxidation resistance of the transparent electrode. The reduction of graphene oxide (r-GO), the coating of metal and polymer improve the oxidation resistance of the transparent electrode to varying degrees. This paper reviews the effect of different capping agents on the aspect ratio of NWs, and the effects of different post-treatments on oxidation resistance and conductivity of transparent electrodes.

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Effects of length dispersity and film fabrication on the sheet resistance of copper nanowire transparent conductors

Cited by 39 publications

References 25 publications

Nanowire formation is preceded by nanotube growth in templated electrodeposition of cobalt hybrid nanostructures

Nanowire formation is preceded by nanotube growth in templated electrodeposition of cobalt hybrid nanostructures

Multigram Synthesis of Cu‐Ag Core–Shell Nanowires Enables the Production of a Highly Conductive Polymer Filament for 3D Printing Electronics

Review on the Synthesis and Antioxidation of Cu Nanowires for Transparent Conductive Electrodes

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