Transfer Printing of Au Micropatterns on Polyimide Films

Komori, Takayuki; Kosuge, Tatsuya; Kuroda, Kazuaki; Saito, Hirofumi; Kimura, Yujiro; Fukushi, Yudai; Maenosono, Hirotaka; Koide, Shohei; Satano, Masahiro; Ikoma, Ryuta; Nishioka, Yasushiro

doi:10.2494/photopolymer.26.309

Cited by 2 publications

(2 citation statements)

References 10 publications

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“…With the development of conductive inks and the improvement in the printing resolution of inkjet printers, it is possible to print wiring with Ag ink [22] or Au ink. [23,24] Additionally, a method of transferring printed wiring between two substrates [25,26] has been devised. We recently reported that a poly(D, L-lactic acid) (PDLLA) nanosheet (thickness: 182 nm) can be employed as a base material of a wirelessly powered device.…”

Section: Introductionmentioning

confidence: 99%

Flexible Induction Heater Based on the Polymeric Thin Film for Local Thermotherapy

Saito

Kanai

Fujita

et al. 2021

Adv Funct Materials

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Local delivery of physical energy, such as heat, is promising for the treatment of target lesions without the unintended distribution of heat to other normal tissue. However, the heating device must be equipped with an external power source or strong magnetic field to operate the device, and many of them are too large to be placed inside the body. In this regard, wireless, lightweight, flexible electronics can be used for the miniaturization of implantable devices. In this study, a flexible induction heating (IH) device is reported that integrates inkjet‐printed wirings and flexible polymeric thin films, specifically Au nanoink‐based wirings (thickness: 1.5 µm) and a biodegradable poly(D, L‐lactic acid) (PDLLA) thin film (thickness: 5 µm). A unique method of transferring the inkjet‐printed Au nanoink wiring onto the PDLLA thin film realizes the integration of the following technical features in one device: biocompatible packaging, a printed IH system, and body conformability. The resulting thin‐film IH device is successfully placed on a hepatic lobe of a beagle dog, which allows for a local increase in temperature of 7 °C after 1‐min power feeding without tissue inflammation. The thin‐film IH device is expected to provide minimally invasive thermotherapy when combined with endoscopic surgery.

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Section: Introductionmentioning

confidence: 99%

Flexible Induction Heater Based on the Polymeric Thin Film for Local Thermotherapy

Saito

Kanai

Fujita

et al. 2021

Adv Funct Materials

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“…Therefore, PI is expected to withstand the high temperatures required for the sterilization process. PI-based microstructures have already been shown to be transferable by hot embossing and are therefore suitable for microelectromechanical systems (MEMS) fabrication processes [18][19][20][21][22][23]. However, conventional PI is not transparent and has an opaque tan color, which would make it difficult to observe any cells cultured on PI sheets.…”

Section: Introductionmentioning

confidence: 99%

A Transparent Polyimide Film as a Biological Cell Culture Sheet with Microstructures

Maenosono¹,

Saito²,

Nishioka³

2014

JBNB

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The research on stem cell cultures has attracted much attention due to the recent development of regenerative medicine. Therefore, higher functionalities for devices used for culturing cells are strongly demanded. In this study, we fabricated cell culture sheets using transparent polyimide (PI), parylene (PA), and polyetheretherketone (PEEK) to make polymer materials that had microstructures. We then cultured stromal marrow cells (OP9) on them and investigated the cell alignment within the microstructures. Hot embossing was used to fabricate the microstructures with a width and depth of 5 μm on the polymer substrates. Cultivation of the cells was confirmed on the transparent PI and PA sheets, however, it was not observed on the PEEK sheet. Slight alignment of the cells was also observed along with the microstructures.

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Transfer Printing of Au Micropatterns on Polyimide Films

Cited by 2 publications

References 10 publications

Flexible Induction Heater Based on the Polymeric Thin Film for Local Thermotherapy

Flexible Induction Heater Based on the Polymeric Thin Film for Local Thermotherapy

A Transparent Polyimide Film as a Biological Cell Culture Sheet with Microstructures

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