A bio-enabled maximally mild layer-by-layer Kapton surface modification approach for the fabrication of all-inkjet-printed flexible electronic devices

Fang, Yihai; Hester, Jimmy; Su, Wenjing; Chow, Justin; Sitaraman, Suresh K.; Tentzeris, Manos M.

doi:10.1038/srep39909

Cited by 35 publications

(41 citation statements)

References 26 publications

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“…In order to perform patterning by means of a suitable ink or paste, the Melinex sheet is preheated at one side to improve adhesion. Also, polyimide film produced by DuPont (Kapton) is suitable for flexible devices because of outstanding features of flexibility, mechanical, chemical and thermal stability as well as constitutes an inert and hydrophobic surface [36]. In this research, Melinex and Kapton films have been selected as substrates for the metasurface design and printing due to their high-performance attributes.…”

Section: Methodsmentioning

confidence: 99%

A 60-GHz Ultra-Thin and Flexible Metasurface for Frequency-Selective Wireless Applications

et al. 2019

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This paper demonstrates a design, fabrication and performance evaluation of a frequency selective 60-GHz flexible metasurface in order to facilitate an unobstructed, secure, and low-loss high-frequency signal propagation. The high-attenuation 60 GHz millimeter-wave (MMW) band is selected for the design of a broadband metasurface. The symmetric metasurface unit-cell structure comprises of an assembly of a circular metallic ring embedded with a square-shaped ring. The screen printing process is deployed to perform fabrication of the metasurface on flexible films by means of highly-conductive nanoparticle copper pastes. Electromagnetic (EM) characteristics of the proposed structure are examined by using the quasi-optic bench testing facility in order to validate its potential contribution in the high data-rate communication links. The proposed ultra-thin and flexible metasurface can be integrated on walls and windows as wallpaper to enhance the wireless signal propagation in highly-dense indoor scenarios.

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Section: Methodsmentioning

confidence: 99%

A 60-GHz Ultra-Thin and Flexible Metasurface for Frequency-Selective Wireless Applications

et al. 2019

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“…(a) Optical image of a flexible, rGO-based, multi-layered gas sensor inkjet-printed on a surface modified Kapton HN film (the GO ink was printed for 10 passes, the selector ink for one pass, and the silver ink for 5 passes). (b) Relative sensitivity of the multi-layered (black solid line) and the single-layered (red dashed line) gas sensors upon exposure to 2.5 ppm dimethyl methylphosphonate [2] (licensed under creative commons attribution 4.0 international license).…”

Section: Fabrication and Sensing Tests Of All-inkjet-printed Flexiblementioning

confidence: 99%

“…water-based) fluids (solutions, suspensions, inks, etc.) will ball up on such surfaces (due to "lotus effect") [1,2]. However, for fabrication of an entire electronic device, both organic solvent-and water-based fluids are usually needed to deposit functional materials on the same substrate surface.…”

Section: Introductionmentioning

confidence: 99%

“…The defects on structurally damaged Kapton films would result in not only poor deposition quality of the device components but also weakened mechanic strength of the resulting devices. The increasingly growing of flexible electronic devices (such as flexible displays [15], electronic paper [16,17], photovoltaic cells [18,19], sensors [1,2,[20][21][22][23], LEDs [24], electronic textiles [25], RF tags [26], and electrochemical devices [27], etc.) is calling for mild and environmentally friendly surface modification approaches which can minimize the compromise to the structural integrity and the properties of Kapton polyimide substrates while efficiently tuning the surface properties of the substrates.…”

Section: Introductionmentioning

confidence: 99%

“…(a) and (b) Low (a) and high (b) magnification optical images of the silver IDEs fabricated by printing (for five passes) the silver nanoparticle ink on a surface modified Kapton film followed by annealing at 120°C for 3 hours. (c) Optical image of the graphene patches fabricated by printing (for five passes) the graphene ink on a surface modified Kapton film followed by drying at 100°C for 1 hour[2] (licensed under creative commons attribution 4.0 international license).…”

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Surface Modification of Polyimide Films for Inkjet-Printing of Flexible Electronic Devices

Fang¹,

Tentzeris²

2018

Flexible Electronics

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Kapton polyimide films are one of the most commonly used flexible and robust substrates for flexible electronic devices due to their excellent thermal, chemical, mechanical, and electrical properties. However, such films feature an inert and highly hydrophobic surface that inhibits the deposition of functional materials with water-based fluids (solutions, suspensions, inkjet inks, etc.), which raise the need for their surface modification to reduce their inherent surface inertness and/or hydrophobicity in order to allow for the fabrication of electronic devices on the substrates. Traditional Kapton surface modification approaches use harsh conditions that not only cause environmental and safety problems but also compromise the structural integrity and the properties of the substrates. This chapter focuses on two recently-developed mild and environmentally friendly wet chemical approaches for surface modification of Kapton HN films. Unlike the traditional methods that target the polyimide matrix of Kapton films, these two methods target the slip additive embedded in the polyimide matrix. The surface modified Kapton films resulted from these two methods allowed for not only great printability of both waterand organic solvent-based inks (thus facilitating the full-inkjet-printing of entire flexible electronic devices) but also strong adhesion between the inkjet-printed traces and the substrate films.

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Smart Nanotextiles for Communication

Ibanez‐Labiano¹,

Jilani²,

Zhang³

et al. 2022

Smart Nanotextiles

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Together with wireless technology, advances in nanotechnology and rapid and scalable synthesis of nanomaterials including the 2D graphene has transformed the realms of biomedical sciences. Recent research in the areas of drug delivery, cancer therapy, bio-sensing and bio-imaging have exploited the unique structural and physiological features of graphene and its different forms. Along with the Graphene, several other nanomaterials including carbon nanotubes (CNTs), make excellent candidates for applications associated with loading of drugs, cellular imaging, sensing other molecules and in-vivo cancer studies due to their biocompatibility and stability. Assimilating from the fundamentals of electromagnetic, wireless communication, medical and material science, a novel concept of nanonetworks was first introduced in 2008, which stems from the concept that a collection of nanodevices have the potential to harness the innate communication capabilities of the human body, thereby allowing them to cooperate and share information. It is anticipated that the advanced healthcare diagnosis can be realised if an efficient communication mechanism and data transfer are established between these nanodevices.

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A bio-enabled maximally mild layer-by-layer Kapton surface modification approach for the fabrication of all-inkjet-printed flexible electronic devices

Cited by 35 publications

References 26 publications

A 60-GHz Ultra-Thin and Flexible Metasurface for Frequency-Selective Wireless Applications

A 60-GHz Ultra-Thin and Flexible Metasurface for Frequency-Selective Wireless Applications

Surface Modification of Polyimide Films for Inkjet-Printing of Flexible Electronic Devices

Smart Nanotextiles for Communication

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