Extremely Simple and Rapid Fabrication of Flexible Transparent Electrodes Using Ultralong Copper Nanowires

Duong, Thanh-Hung; Kim, Hyun-Chul

doi:10.1021/acs.iecr.7b04709

Cited by 30 publications

(16 citation statements)

References 29 publications

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“…While AgNWs are still subject to oxidation [ 87 , 88 , 89 , 90 ], other metal nanowires have even more rapid oxidation (e.g., copper nanowires [ 91 , 92 ]) or remain costly (i.e., gold nanowires (AuNWs) [ 4 ]), which can compromise stable conductivity. Methods of mitigating nanowire oxidation remain an active area of research [ 93 , 94 ]. Nanowire performance is dependent upon aspect ratio, loading density, and interfacial adhesion between the nanowires and the substrate.…”

Section: Materials Considerationsmentioning

confidence: 99%

Advances in Materials for Soft Stretchable Conductors and Their Behavior under Mechanical Deformation

Nguyen

Khine

2020

Polymers

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Soft stretchable sensors rely on polymers that not only withstand large deformations while retaining functionality but also allow for ease of application to couple with the body to capture subtle physiological signals. They have been applied towards motion detection and healthcare monitoring and can be integrated into multifunctional sensing platforms for enhanced human machine interface. Most advances in sensor development, however, have been aimed towards active materials where nearly all approaches rely on a silicone-based substrate for mechanical stability and stretchability. While silicone use has been advantageous in academic settings, conventional silicones cannot offer self-healing capability and can suffer from manufacturing limitations. This review aims to cover recent advances made in polymer materials for soft stretchable conductors. New developments in substrate materials that are compliant and stretchable but also contain self-healing properties and self-adhesive capabilities are desirable for the mechanical improvement of stretchable electronics. We focus on materials for stretchable conductors and explore how mechanical deformation impacts their performance, summarizing active and substrate materials, sensor performance criteria, and applications.

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Section: Materials Considerationsmentioning

confidence: 99%

Advances in Materials for Soft Stretchable Conductors and Their Behavior under Mechanical Deformation

Nguyen

Khine

2020

Polymers

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“…Cu NWs were synthesized following our previous synthesis procedures [12]. The pure Cu NWs were then dispersed in 0.5 wt% poly(vinyl pyrrolidone) (PVP) in IPA for storage.…”

Section: Copper Nanowire Transparent Conducting Film Preparationmentioning

confidence: 99%

“…Crystals 2020, 10, x FOR PEER REVIEW 4 of 13 Figure 3 shows the SEM images, which exhibited uniform, straight, and ultralong Cu NWs. The Cu NWs were synthesized following our previously reported methods [12] with dimensions of D = 52.1 ± 6.6 nm and L ≥ 100 μm to give high aspect ratio NWs, i.e., length/diameter (L/D) > 2380. Transparent electrodes that were prepared using our Cu NWs demonstrated excellent optoelectronic performance, specifically in terms of sheet resistance (Rs) versus transmittance (%T): 7.3, 30, 58, and 100 Ω/sq at 72.4, 90, 94, and 97% respectively.…”

Section: Pulsed Platingmentioning

confidence: 99%

Pulsed Electrodeposition for Copper Nanowires

et al. 2020

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Copper nanowires (Cu NWs) are a promising alternative to indium tin oxide (ITO), for use as transparent conductors that exhibit comparable performance at a lower cost. Furthermore, Cu NWs are flexible, a property not possessed by ITO. However, the Cu NW-based transparent electrode has a reddish color and tends to deteriorate in ambient conditions due to the oxidation of Cu. In this paper, we propose a pulsed-current (PC) plating method to deposit nickel onto the Cu NWs in order to reduce oxidation over a 30-day period, and to minimize the sheet resistance. Additionally, the effects of the pulse current, duty cycle, and pulse frequency on the performance of the Cu–Ni (copper–nickel) NW films have also been investigated. As a result, the reddish color of the electrode was eliminated, as oxidation was completely suppressed, and the sheet resistance was reduced from 35 Ω/sq to 27 Ω/sq. However, the transmittance decreased slightly from 86% to 76% at a wavelength of 550 nm. The Cu–Ni NW electrodes also exhibited excellent long-term cycling stability after 6000 bending cycles. Our fabricated Cu–Ni electrodes were successfully applied in flexible polymer-dispersed liquid crystal smart windows.

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“…[31][32][33] Ag NWs are the most commonly used metal NWs for transparent electrodes, thin¯lms of which have been shown to exhibit conductivities and transmittance comparable to those of ITO. [34][35][36][37][38] The superior intrinsic conductivity, high electron density and outstanding optical scattering ability have attracted a lot of research interest for Ag NWs. [39][40][41][42] Ag NWs have been successfully used in constructing high-performance devices such as°exible conductors, solar cells, 30,43-45°e xible energy generation devices, [46][47][48][49] stretchable energy storage devices, 50,51°e xible display, [52][53][54][55][56] wearable electronics, [57][58][59][60] air lter 61 and soft robot.…”

Section: Introductionmentioning

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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Extremely Simple and Rapid Fabrication of Flexible Transparent Electrodes Using Ultralong Copper Nanowires

Cited by 30 publications

References 29 publications

Advances in Materials for Soft Stretchable Conductors and Their Behavior under Mechanical Deformation

Advances in Materials for Soft Stretchable Conductors and Their Behavior under Mechanical Deformation

Pulsed Electrodeposition for Copper Nanowires

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

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