Inkjet printed transparent and bendable patch antenna based on polydimethylsiloxane and indium tin oxide nanoparticles

Khan, Muhammad Arshad Hassan; Ali, Shawkat; Bae, Jinho; Lee, Chong Hyun

doi:10.1002/mop.30171

Cited by 16 publications

(10 citation statements)

References 13 publications

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“…Recently, ITO NP-based nanoink-coating methods have attracted much attention as ecofriendly fabrication processes to obtain ITO thin films under mild atmospheric conditions. To date, dip coating, − inkjet printing, − and spin coating have been demonstrated to produce ITO NP-based thin films. To fabricate transparent conductive films with both low resistivity and high transparency, removing the additives contaminating the thin films is essential because such additives on the surfaces of the ITO NPs lead to a drastic increase in the interface resistance between the ITO NPs.…”

Section: Introductionmentioning

confidence: 99%

Single-Crystalline Protrusion-Rich Indium Tin Oxide Nanoparticles with Colloidal Stability in Water for Use in Sustainable Coatings

Suzuki

Nishi

Matsubara

et al. 2020

ACS Appl. Nano Mater.

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Indium tin oxide (ITO) nanoparticles (NPs) with protrusions on their surfaces have been successfully obtained by solvothermal synthesis under high In3+ and Cl– concentrations. High-resolution transmission electron microscopy (HR-TEM) observations revealed that the ITO NPs with protrusions consisted of not a polycrystalline but a single-crystalline structure. The results suggested that the unique shape was produced by heterogeneous epitaxial nucleation on the growing surfaces of the ITO NPs in the presence of tetramethylammonium hydroxide (TMAH). Inhibition of homogeneous particle growth by adsorption of a large excess amount of Cl– ions on the surfaces of growing ITO NPs might play a critical role in the evolution of the unique protrusions. Compared to single-crystalline ITO NPs with a cubic shape, the ITO NPs thus obtained showed a high specific surface area and a low resistivity. Furthermore, the ITO NPs with protrusions exhibited an unprecedented high dispersion stability in water for a long period without the use of any dispersant. 1H nuclear magnetic resonance (NMR) relaxation (T 2) measurements revealed that such high dispersion stability could be due to the shape-triggered increase in the hydrophilicity of the surfaces of the ITO NPs. The resulting ITO NP dispersions in water could be applied to prepare ITO thin films with low resistivity on a glass substrate. The behavior has great potential for application as sustainable coating materials to fabricate transparent conductive ITO thin films on flexible substrates under mild atmospheric conditions without usage of expensive production systems and harmful and environmentally undesirable chemicals.

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Section: Introductionmentioning

confidence: 99%

Single-Crystalline Protrusion-Rich Indium Tin Oxide Nanoparticles with Colloidal Stability in Water for Use in Sustainable Coatings

Suzuki

Nishi

Matsubara

et al. 2020

ACS Appl. Nano Mater.

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“…Metal nanowires with high electrical conductivity and optical transparency are mainly AgNWs and CuNWs. [ 13,88–92 ] Transparent conducting oxides (TCO) include ITO, [ 19,26,48,51,52,78,93–96 ] gallium‐doped zinc oxide (GZO), [ 11 ] and aluminum‐doped zinc oxide (AZO). [ 55,97 ] Conductive polymers are dominated by poly(3,4‐ethylene‐dioxythiophene) polystyrene sulfonate (PEDOT:PSS).…”

Section: Printable Materials For Transparent Rf Electronicsmentioning

confidence: 99%

Optically Transparent and Flexible Radio Frequency Electronics through Printing Technologies

Akhter

Vaseem

et al. 2022

Adv Materials Technologies

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on several nonplanar objects and worn by humans, they must be mechanically flexible. Moreover, to maintain the abundance of such wireless devices in a smart city and still maintain the aesthetics, it is desirable that they be optically transparent. Finally, to afford this IoT revolution, in which billions of devices are required, the cost of an individual device must be extremely low. As displayed in Figure 1, this new form of transparent RF electronics can help in many smart city applications without affecting the functions of the existing structures where they will be deployed. For example, specially designed periodic structures, namely reconfigurable intelligent surfaces (RIS), can enhance the 5G and beyond communication by increasing the coverage area, spectrum, and energy efficiency. [7] Transparent RIS integrated on buildings, cars, and train windows can optimize the reflection and transmission characteristics of the 5G signal according to the user positions via tunable and switchable devices. [8] Transparent antennas on cars can provide diverse connectivity for radio, GPS, television, smartphones, and so on while maintaining aesthetics. [9][10][11] This can likewise serve as a mainstream technology for autonomous cars, which would rely on radar antennas on the car body. Another example is a transparent frequency selective surface (FSS), which is a periodic structure for selectively shielding from unwanted frequency bands while allowing the bands of interest to pass through. [12][13][14][15][16][17] Other examples of transparent RF electronics include RF circuits, [18] EM absorbers, [19][20][21] RF shielding, [22][23][24][25] and RF energy harvesting. [26,27] A highly suitable approach to realize this new form of mechanically flexible and optically transparent RF electronics is via printing technologies. Printed electronics (PE), as the name suggests, are electronic devices manufactured using traditional printing technologies. Compared with conventional fabrication techniques, such as milling, photolithography, and etching, [11,18,20,28,29] printing has many merits that make it suitable for the subsequent generations of electronics, such as ease of mass production with simple procedures, lower costs, higher throughput, and the ability to work with flexible materials and substrates. PE technologies allow for the direct deposition of various materials, including conductors, semiconductors, and dielectrics, among others, on different flexible substrates to form 2D and 3D patterns. PE has been widely

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“…Transparent conductive metal oxides (TCOs) have high optical transparency in the visible light region and high electronic conductivity. , Because of their unique characteristics, TCOs are applied as transparent electrodes in optoelectronic devices such as flat panel displays, electric paper, touch panels, and solar cells. , Tin-doped indium oxide (ITO) with an n-type electron conductive property is well-known as the most representative TCO. , In general, ITO electrodes are industrially fabricated by sputtering or laser deposition methods followed by masking and chemical etching processes. − However, the multistage process requires expensive production systems and the use of environmentally harmful chemicals. Recently, nanoink-coating methods have attracted much attention as ecofriendly, low-cost, and sustainable fabrication processes to obtain TCOs, metal electrodes, and thin films under mild atmospheric conditions. − To date, dip coating, − inkjet printing, − spin coating, and nanoink coating have been used to manufacture ITO nanoparticle (NP)-based electrodes and thin films on substrates. However, indium is a rare metal, and inhalation of ITO dust may induce lung injury .…”

Section: Introductionmentioning

confidence: 99%

Gallium-Doped Zinc Oxide Nanoparticle Thin Films as Transparent Electrode Materials with High Conductivity

Nishi

Kasai

Suzuki

et al. 2020

ACS Appl. Nano Mater.

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Gallium-doped zinc oxide (GZO) nanoparticles (NPs) have been synthesized by a solvothermal synthesis method using gallium chloride and zinc chloride as precursors in anhydrous methanol along with bases. Systematic investigations have revealed that H2O, formed through the condensation of metal hydroxides to obtain GZO NPs, not only enhances the production of layered compounds as byproducts but also accelerates Ostwald ripening to reduce the amount of doped gallium ions. To overcome H2O generation during NP growth, we first applied sodium methoxide (NaOMe) as a base for the synthesis of GZO NPs. As a result, high-performance GZO NPs were successfully obtained in a single phase, and the mean particle size of the GZO NPs was controlled from 10 to 35 nm by changing the molar ratio of the sodium hydroxide (NaOH) and NaOMe in the reaction mixture. We further applied the obtained GZO NPs to prepare GZO NP-based transparent conductive metal oxide (TCO) films using an NP-mist deposition strategy as our developed NP-coating method on substrates. The resistivity and transparency of the deposited GZO thin films were compared with those of conventional thin films prepared by a dispersion coating method, showing that NP-mist deposition is a promising method for fabricating high-performance GZO NP-based TCO thin films on substrates under mild atmospheric conditions.

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Inkjet printed transparent and bendable patch antenna based on polydimethylsiloxane and indium tin oxide nanoparticles

Cited by 16 publications

References 13 publications

Single-Crystalline Protrusion-Rich Indium Tin Oxide Nanoparticles with Colloidal Stability in Water for Use in Sustainable Coatings

Single-Crystalline Protrusion-Rich Indium Tin Oxide Nanoparticles with Colloidal Stability in Water for Use in Sustainable Coatings

Optically Transparent and Flexible Radio Frequency Electronics through Printing Technologies

Gallium-Doped Zinc Oxide Nanoparticle Thin Films as Transparent Electrode Materials with High Conductivity

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