Wormlike Micelle Assisted Rod Coating: A General Method for Facile Fabrication of Large-Area Conductive Nanomaterial Thin Layer onto Flexible Plastics

Xie, Jing-Yi; Wang, Huan; Bai, Huadong; Yang, Peng; Shi, Mengxue; Guo, Peng; Wang, Chen; Yang, Wantai; Song, Huaihe

doi:10.1021/am201830t

Cited by 14 publications

(12 citation statements)

References 57 publications

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“…According to the previous literature research, the best solution viscosity ranges between 0.02-1 Pa s for the rod coating method. 24 The additive PAA or CMC has a less influence on the viscosity of SWCNT dispersions. The dispersions of SWCNT : SDBS : TX100 : PAA = 1 : 10 : 20 : 20 and SWCNT : SDBS : TX100 : CMC = 1 : 10 : 20 : 20 both can be used by the rod-coating method to fabricate a large area SWCNT film with high performance.…”

Section: Resultsmentioning

confidence: 99%

Fabrication and evaluation of adhesion enhanced flexible carbon nanotube transparent conducting films

et al. 2015

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Single-walled carbon nanotubes (SWCNTs) were dispersed in water with the help of a combination of surfactants to achieve a high concentration SWCNT ink. Transparent conducting films (TCFs) were fabricated through a rod-coating method using the SWCNT ink. The addition of binders (polyacrylic acid or carboxymethyl cellulose) greatly enhanced the adhesion of SWCNT films to substrates and the cohesion between CNTs, which produced a uniform film of SWCNTs by preventing damage during the post-treatment process. The thickness of SWCNT films is controlled by the amount of SWCNTs in the solution and the diameter of the wire used. To test the film adhesion, Scotcht tape was used to detach some loosely bound SWCNTs. Then the SWCNT films were further post-treated with nitric acid to improve the conductivity. The addition of polyacrylic acid to the SWCNT dispersion improved the film adhesion obviously without decreasing its electrical conductivity. This rod-coating method demonstrates great potential for the scalable fabrication of flexible SWCNT-TCFs.

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Section: Resultsmentioning

confidence: 99%

Fabrication and evaluation of adhesion enhanced flexible carbon nanotube transparent conducting films

et al. 2015

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“…1-3 Current TC electrodes are made of semiconductor-based materials, of which the most frequently employed is indium tin oxide (ITO), which is n-doped and has a composition of ~10% SnO 2 and ~90% In 2 O. 1 A graphene-based TC film can be synthesized using various methods, including methods based on solution-processed reduced graphene oxide (rGO) [7][8][9] , liquid-phase exfoliation 10 and electrochemically exfoliated graphene flakes 11,12 ; in this last case, the graphene flakes can be easily dispersed to form a suspension ink, from which a thin film can then be obtained via versatile coating routes, such as Langmuir−Blodgett (LB) assembly 13,14 , spray coating 15 and rod coating 16 . Although frequently used, ITO suffers from many shortcomings, including the following: (1) degradation of conductivity due to its brittle nature when it is subjected to mechanical bending, which limits its usage in flexible devices; (2) low stability in acidic and basic environments, which leads to short device lifetimes because of the susceptibility of the active materials in the devices to ion diffusion; (3) strong absorption of high-energy light (>4 eV), which hinders the use of ITO in the window layers of many optical devices, such as UV light emitters; and (4) limitations with regard to work-function engineering.…”

Section: Introductionmentioning

confidence: 99%

Wide-range work-function tuning of active graphene transparent electrodes via hole doping

Syu

Chen

et al. 2016

RSC Adv.

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Graphene is regarded as a potential candidate to replace the transparent conductive (TC) electrodes that are currently used in various optoelectronic applications. However, there is still a lack of methods by which to achieve low sheet resistance (R s ) with stable doping and work functions with a wide range of tunability, which is significant for band alignment at the interface to enhance charge transport and thus to achieve higher device performance. We developed a novel strategy for preparing a TC electrode by doping 2 layer-by-layer (LBL)-stacked graphene with AuCl 3 , by which means an excellent TC performance (an Rs of 40 ohm/sq at a transmittance (T) of 89.5%) and an extremely wide range of work-function tunability (~1.5 eV) were successfully achieved. Moreover, a hybrid electrode prepared by transferring doped graphene onto pre-patterned Cu metal mesh exhibited a low resistance of ~4.9 ohm/sq. In addition, we monitored the longterm stability of AuCl 3 -doped graphene for 6 months and also constructed a model for accelerated degradation testing. The relevant mechanism of charge transfer between the graphene and the dopants was characterized based on X-ray photoelectron spectroscopy (XPS) spectra to elucidate degradation observed after long-term testing. This work contributes a novel type of "active electrode"; the doped graphene film not only serves as a high-performance TC electrode but also provides a wide range of tunable work functions. The proposed active electrode is prepared using a scalable and facile doping process, which paves the way for its usage in applications such as optoelectronic devices.

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“…Attachment and detachment of the fluorescent sensor units from CDNPs was confirmed and analyzed by XPS wide-scan spectra and Fourier transform infrared spectroscopy (Figure i). To illustrate with NS1 as an example, the peak at 399.4 eV was contributed by the NN of azobenzene group, − and the rate of integral area of the peak was 76.0%, from which we calculated that the nitrogen content of azobenzene to be 3.42%, implying that A1 was present as a coating on CDNPs. However, when the nanoparticles were irradiated with UV and rinsed with DMF solution, the content of N was reduced to 0.88%, suggesting that nitrogen-containing components were washed off.…”

Section: Resultsmentioning

confidence: 99%

Regenerable Fluorescent Nanosensors for Monitoring and Recovering Metal Ions Based on Photoactivatable Monolayer Self-Assembly and Host–Guest Interactions

Wang

Wong

Sun

et al. 2015

ACS Appl. Mater. Interfaces

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Efficient detection, removal, and recovery of heavy metal ions from aqueous environments represents a technologically challenging and ecologically urgent question in the face of increasing metal-related pollution and poisoning across the globe. Although small-molecule and entrapment-based nanoparticle sensors have been extensively explored for metal detection, neither of these extant strategies satisfies the critical needs for high-performance sensors that are inexpensive, efficient, and recyclable. Here we first report the development of a regenerable fluorescent nanosensor system for the selective and sensitive detection of multiple heavy metal ions, based on light-switchable monolayer self-assembly and host-guest interactions. The system exploits photocontrolled inclusion and exclusion responses of an α-cyclodextrin (CD)-containing surface conjugated with photoisomerizable azobenzene as a supramolecular system that undergoes reversible assembly and disassembly. The metal nanosensors can be facilely fabricated and photochemically switched between three chemically distinct entities, each having an excellent capacity for selective detecting specific metal ions (namely, Cu(2+), Fe(3+), Hg(2+)) in a chemical system and in assays on actual water samples with interfering contaminants.

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Wormlike Micelle Assisted Rod Coating: A General Method for Facile Fabrication of Large-Area Conductive Nanomaterial Thin Layer onto Flexible Plastics

Cited by 14 publications

References 57 publications

Fabrication and evaluation of adhesion enhanced flexible carbon nanotube transparent conducting films

Fabrication and evaluation of adhesion enhanced flexible carbon nanotube transparent conducting films

Wide-range work-function tuning of active graphene transparent electrodes via hole doping

Regenerable Fluorescent Nanosensors for Monitoring and Recovering Metal Ions Based on Photoactivatable Monolayer Self-Assembly and Host–Guest Interactions

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