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Template-Guided Nondeterministic Assembly of Organosilica Nanodots for Multifunctional Physical Unclonable Functions
Ying Liu1, Manman Zhang1,2, Chiyu Wang1,3
1Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Molecular Sciences, Henan University, Kaifeng 475004, China.
ACS Applied Materials & Interfaces
|January 2, 2025
Summary
This study introduces a new optical physical unclonable function (PUF) using organosilica nanodots. The novel design integrates fluorescence and structural color for robust, multilevel security in the Internet of Things (IoT).
Area of Science:
- Photonics and Materials Science
- Nanotechnology
- Cybersecurity
Background:
- Optical physical unclonable functions (PUFs) are crucial for Internet of Things (IoT) security.
- Integrating multiple optical responses (fluorescence, structural color) enhances PUF security but faces integration challenges.
- Compactly combining photonic components for multilevel authentication is difficult.
Purpose of the Study:
- To develop a compact, multifunctional optical PUF system.
- To overcome challenges in integrating diverse optical properties for enhanced security.
- To create a robust authentication solution for IoT and anticounterfeiting.
Main Methods:
- Template-guided assembly of organosilica nanodots (OSiNDs).
- Controlled dewetting process to form nanoisland structures.
- Simultaneous control of solid-state fluorescence, rainbow holography, and PUF patterns.
Main Results:
- Achieved a 4096-bit key with 3228 bits of entropy and 1 Gbit/in² storage density.
- Demonstrated a low false positive rate of 10⁻⁶.
- Integrated multilevel anticounterfeiting features with distinct color patterns under varying illumination angles.
Conclusions:
- The developed multifunctional PUF offers high security and compact design.
- OSiNDs provide enhanced fluorescence, thermal stability, and holographic properties.
- The system exhibits excellent environmental stability and durability for real-world applications.
