Inkjet−Printable Nanoporous Ag Disk Arrays Enabling Coffee−Ring Effect−Driven Analyte Enrichment Towards Practical SERS Applications

Wi, Jung‐Sub; Kim, Jeong Dae; Lee, Wonseok; Choi, Hyunsik; Kwak, Minjeong; Song, Jungkeun; Lee, Tae Geol; Ok, Jong G.

doi:10.1007/s40684-021-00351-6

Cited by 18 publications

(10 citation statements)

References 38 publications

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“…To this end, the solution-processable Ag nanostructure (SPAN) which can be fabricated in a vacuum-free and scalable fashion through the simple coating and much milder annealing (i.e., at ∼120–180 °C) of an ionic Ag ink , can provide a suitable framework for ZNWs. More remarkably, the SPAN film could replace the textured ZnO seed for reliable hydrothermal ZNW growth, as preliminarily noted in earlier studies. , The present work will shed light on how ZNW growth is controlled by the SPAN morphology, which can be readily tuned by the ionic Ag ink concentration and coating condition.…”

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confidence: 99%

Solution-Processable Ag-Mediated ZnO Nanowires for Scalable Low-Temperature Fabrication of Flexible Devices

Choi

Kim

et al. 2022

ACS Appl. Electron. Mater.

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We present a scalable and vacuum-free hybrid nanoarchitecturing strategy demonstrated by the solution-processable Ag-mediated ZnO nanowire (termed "SPAZN") growth on transparent and flexible substrates at low temperature. The SPAZN protocol enables selective hydrothermal ZnO nanowire (ZNW) growth on a nanoporous Ag framework obtainable from mild annealing of ionic Ag ink coating. The ZNW morphology and density can be readily controlled by tuning the SPAZN processing parameters including Ag ink concentration, coating condition, and hydrothermal growth temperature based on the underpinnings of the Ag-morphology-mediated ZNW growth mechanism proposed. We exemplify a transparent plastic gas sensor as one of many promising applications.

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confidence: 99%

Solution-Processable Ag-Mediated ZnO Nanowires for Scalable Low-Temperature Fabrication of Flexible Devices

Choi

Kim

et al. 2022

ACS Appl. Electron. Mater.

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“…The Ag/organic complex contains a functional amino group that strongly adheres to the metal, as shown in Figure b. The chemical structures of the Ag/organic complexes, which were dissolved in isopropyl alcohol (IPA), are shown in Figure c. − In addition, a thin Ag layer formed from organic Ag complex compounds has high conductivity and strong adhesion. , If the junction is reinforced with Ag/organic complexes, the electrical and structural performance can be improved because of the strong adhesion. Most Ag ions will adhere to the AgNW surface because adhesion with metal is more robust than that with glass .…”

Section: Resultsmentioning

confidence: 99%

“…55−58 In addition, a thin Ag layer formed from organic Ag complex compounds has high conductivity and strong adhesion. 59,60 If the junction is reinforced with Ag/organic complexes, the electrical and structural performance can be improved because of the strong adhesion. Most Ag ions will adhere to the AgNW surface because adhesion with metal is more robust than that with glass.…”

Section: Resultsmentioning

confidence: 99%

Ag Nanowires via Solution Process and Localized Reduction of Ag Ions for Next-Generation Transparent Conductive Electrodes

Tran

Trinh

et al. 2022

ACS Appl. Nano Mater.

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Metal nanowires are promising next-generation transparent conductive electrodes for application in optoelectronic devices in the field of printed electronics. Because metal nanowire networks have high contact resistance, welding at the junction between nanowires via heat treatment must be performed to improve the conductivity of the network. However, in the annealing step of metal nanowire production, problems such as thermal breakdown due to Rayleigh instability frequently occur. In addition, the conductivity of metal nanowires can be improved via the use of conductive nanomaterials. However, many coating materials can also reduce the transmittance. In this study, we describe a method for locally reducing Ag ions at the surfaces or junctions of Ag nanowires through Joule heating without optical loss. Herein, an organometallic precursor solution containing Ag ions functionalized with amino groups (−NH 2 ) is selectively adhered onto the metal. The attached Ag ions were reduced without any reducing agent, and the electrode conductivity was enhanced via lowering of contact resistance between the Ag nanowires without optical loss. The localized reduced (LR) AgNW electrode exhibited a sheet resistance of 14.4 Ω/sq and a transmittance of 93.04%, which are improved compared to those reported in previous studies. The LR-AgNW could be easily transferred to a flexible plastic film substrate, which was successfully embedded and applied to a light-emitting device that exhibited steady light-emitting performance even when bent. The flexible LR-AgNW film is expected to be useful in various optoelectronic devices such as solar cells, organic light-emitting diodes, touch screens, and wearable devices.

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“…To this end, we demonstrate a functional micro/nanoarchitecture consisting of solution-processed ZnO nanowire (NW) structures selectively grown on solution-processed Ag electrodes fabricated by continuous rollable photolithography for exible transducer devices such as UV sensors. More speci cally, initially we create Ag layers from the mild thermal reduction of an ionic Ag ink coating, which can be performed on any common -either rigid or exible -substrate, including glass and polymer lm [20][21][22][23]. The Ag layer can then be patterned into interdigitated (IDT) microelectrodes through continuous photo roll lithography (PRL) [24][25][26]; during the PRL process, a exible photomask-attached hollow quartz roll inside of which a UV exposure source is mounted rolls over the photoresist (PR)-coated substrate fed continuously underneath.…”

Section: Introductionmentioning

confidence: 99%

Demonstration of a roll-to-roll-configurable, all-solution-based progressive assembly of flexible transducer devices consisting of functional nanowires on micropatterned electrodes

Han

Song

Kim

et al. 2023

Preprint

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We demonstrate continuous fabrication of flexible transducer devices consisting of interdigitated (IDT) Ag microelectrodes interconnected by ZnO nanowires (ZNWs), created via serially connected solution-processable micro- and nanofabrication processes. On an Ag layer obtainable from the mild thermal reduction of an ionic Ag ink coating, the roll-to-roll-driven photolithography process (termed photo roll lithography (PRL)) followed by wet-etching can be applied to continuously define the IDT microelectrode structure. Conformal ZNWs can then be grown selectively on the Ag electrodes to interconnect them via an Ag-mediated hydrothermal ZNW growth that does not require high-temperature seed sintering. Given that all of these constitutive processes are vacuum-free and solution-processable at a low temperature, and are compatible with continuous processing onto flexible substrates, they can be eventually configured into the roll-to-roll-processable progressive assembly. Through parametric optimizations of processes consisting of the roll-to-roll-configurable, solution-based progressive assembly of nanostructures (ROLSPAN), a flexible transducer consisting of ZNW-interconnected, PRL-ed IDT Ag electrodes can be developed. This flexible architecture faithfully performs UV sensing as well as optoelectronic transduction. The ROLSPAN concept along with its specific applicability to flexible devices may inspire many diverse functional systems requiring high-throughput low-temperature fabrication over large-area flexible substrates.

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Inkjet−Printable Nanoporous Ag Disk Arrays Enabling Coffee−Ring Effect−Driven Analyte Enrichment Towards Practical SERS Applications

Cited by 18 publications

References 38 publications

Solution-Processable Ag-Mediated ZnO Nanowires for Scalable Low-Temperature Fabrication of Flexible Devices

Solution-Processable Ag-Mediated ZnO Nanowires for Scalable Low-Temperature Fabrication of Flexible Devices

Ag Nanowires via Solution Process and Localized Reduction of Ag Ions for Next-Generation Transparent Conductive Electrodes

Demonstration of a roll-to-roll-configurable, all-solution-based progressive assembly of flexible transducer devices consisting of functional nanowires on micropatterned electrodes

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