Template-Guided Nondeterministic Assembly of Organosilica Nanodots for Multifunctional Physical Unclonable Functions

• DOI: 10.1021/acsami.4c16881
• Publication Date: 2025-01-02T07:40:39Z
• Authors: Ying Liu; Manman Zhang; Chiyu Wang; Xianrui Meng; Xiaomin Fang; Wenkai Zhang; Tao Ding; Dun Liu; Gil Ju Lee; Xudong Chen
• Keywords: Physical unclonable function; Nanodot

Optical physical unclonable functions (PUFs) are gaining attention as a robust security solution for identification in the expanding Internet of Things (IoT). To enhance and functionality PUFs, integrating multiple optical responses─such fluorescence structural color─into single system is essential. These diverse properties enable multilevel authentication, where different layers can be verified under varying light conditions, greatly reducing risk counterfeiting. However, compactly these photonic components poses significant challenges due to difficulty aligning combining their behaviors within limited space. In this study, we address by employing template-guided assembly organosilica nanodots (OSiNDs), which allows simultaneous control solid-state fluorescence, rainbow holography, PUF patterns. By precisely tuning dewetting process, OSiNDs assemble into nanoisland structures that provide enhanced brightness thermal stability while maintaining distinct holographic properties. Our produces 4096-bit key with 3228 bits entropy, storage density 1 Gbit/in