DataVXACS Applied Materials & InterfacesPaper
journal article·2024-02-14

Physical Unclonable Functions Employing Circularly Polarized Light Emission from Nematic Liquid Crystal Ordering Directed by Helical Nanofilaments

Jun-Sung Park, Jae-Jin Lee, Yong-Jun Choi, Tae-Woong Moon, Seunghyun Kim, Seungwoo Cho, Haeun Kang, Dong Ha Kim, Jongwook Park, Suk-Won Choi

ACS Applied Materials & Interfaces· Volume 16· Issue 6
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Source abstract

Abstract

This study proposes the use of physical unclonable functions employing circularly polarized light emission (CPLE) from nematic liquid crystal (NLC) ordering directed by helical nanofilaments in a mixed system composed of a calamitic NLC mixture and a bent-core molecule. To achieve this, an intrinsically nonemissive NLC is blended with a high concentration of a luminescent rod-like dye, which is miscible up to 10 wt % in the calamitic NLC without a significant decrease in the degree of alignment. The luminescence dissymmetry factor of CPLEs in the mixed system strongly depends on the degree of alignment of the dye-doped NLCs. Furthermore, the mixed system prepared in this study exhibits two randomly generated chiral domains with CPLEs of opposite signs. These chiral domains are characterized not only by their CPLE performances but also by their ability to generate random patterns up to several millimeters, making them promising candidates for high-performance secure authentication applications.
Source: openalex_inverted_index · Quality: baseline

Research context

Nanomaterials

OpenAlex topics: Liquid Crystal Research Advancements · Luminescence and Fluorescent Materials · Photochromic and Fluorescence Chemistry

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Advanced Materials Engineering for Information & Electronics, Kyung Hee University, Gyeonggi-do 17104, Republic of Korea

Integrated Education Institute for Frontier Science & Technology (BK21 Four), Kyung Hee University, Gyeonggi-do 17104, Republic of Korea

Integrated Engineering, Department of Chemical Engineering, Kyung Hee University, Gyeonggi 17104, Republic of Korea

Department of e-Business, Ajou University, Gyeonggi 17104, Republic of Korea

Department of Chemistry and Nano Science, Ewha Womans University, Seoul 03760, Republic of Korea

Basic Sciences Research Institute (Priority Research Institute), Ewha Womans University, Seoul 03760, Republic of Korea

Funding

National Research Foundation of Korea · Ministry of Education, Korea

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