Application of Thin Films of Conjugated Polymers in Novel LED's and Liquid Crystal 'Light Valves'

A facial, versatile, and universal method that breaks the substrate limits is desirable for antifouling treatment. Thin films of functional poly-p-xylylenes (PPX) that are deposited using chemical vapor deposition (CVD) provide a powerful platform for surface immobilization of molecules. In this study, we prepared an alkyne-functionalized PPX coating on which poly (sulfobetaine methacrylate-co-Az) could be conjugated via click chemistry. We found that the conjugated polymers were very stable and inhibited cell adhesion and protein adsorption effectively. The same conjugation strategy could also be applied to conjugate azide-containing poly (ethylene glycol) and poly (NIPAAm). The results indicate that our method provides a simple and robust tool for fabricating antifouling surfaces on a wide range of substrates using CVD technology of functionalized poly (p-xylylenes) for biosensor, diagnostics, immunoassay, and other biomaterial applications.

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Electric Double Layer Action of High-quality Ionic Liquid Crystal Thin Films

Chemistry Letters ◽

10.1246/cl.210692 ◽

2021 ◽

Author(s):

Haruka Komatsu ◽

Miyuki Tanaka ◽

Kenichi Kaminaga ◽

Shingo Maruyama ◽

Yuji Matsumoto

Keyword(s):

Thin Films ◽

Ionic Liquid ◽

Liquid Crystal ◽

Double Layer ◽

Electric Double Layer ◽

High Quality

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Atomic Layer-Deposited Al-Doped ZnO Thin Films for Display Applications

Coatings ◽

10.3390/coatings10060539 ◽

2020 ◽

Vol 10 (6) ◽

pp. 539 ◽

Cited By ~ 2

Author(s):

Dimitre Dimitrov ◽

Che-Liang Tsai ◽

Stefan Petrov ◽

Vera Marinova ◽

Dimitrina Petrova ◽

...

Keyword(s):

Thin Films ◽

Liquid Crystal ◽

Indium Tin Oxide ◽

Near Infrared ◽

Atomic Layer ◽

Optical Transmittance ◽

Flexible Polymer ◽

Polymer Dispersed ◽

Infrared Spectral ◽

Aluminum Doped Zinc Oxide

The integration of high uniformity, conformal and compact transparent conductive layers into next generation indium tin oxide (ITO)-free optoelectronics, including wearable and bendable structures, is a huge challenge. In this study, we demonstrate the transparent and conductive functionality of aluminum-doped zinc oxide (AZO) thin films deposited on glass as well as on polyethylene terephthalate (PET) flexible substrates by using an atomic layer deposition (ALD) technique. AZO thin films possess high optical transmittance at visible and near-infrared spectral range and electrical properties competitive to commercial ITO layers. AZO layers deposited on flexible PET substrates demonstrate stable sheet resistance over 1000 bending cycles. Based on the performed optical and electrical characterizations, several applications of ALD AZO as transparent conductive layers are shown—AZO/glass-supported liquid crystal (LC) display and AZO/PET-based flexible polymer-dispersed liquid crystal (PDLC) devices.

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