期刊
SCIENTIFIC REPORTS
卷 12, 期 1, 页码 -出版社
NATURE PORTFOLIO
DOI: 10.1038/s41598-022-04901-z
关键词
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资金
- NEDO Entrepreneurs Program (NEP)
- Founation of Global Life Learning Center
- Strategic Information and Communications R&D Promotion Program (SCOPE) [20160715]
This study describes a physically unclonable functions taggant based on surface-enhanced Raman scattering of discrete self-assemblies of Au nanoparticles in an aqueous-soluble ink. With this stealth nanobeacon printing, a fingerprint-type Raman spectroscopy signal can be detected and identified even on a business card with a pigment mask. This overcomes the reverse engineering problem of similar anti-counterfeiting techniques and has significant implications for steganography and anti-counterfeiting.
Counterfeiting of financial cards and marketable securities is a major social problem globally. Electronic identification and image recognition are common anti-counterfeiting techniques, yet they can be overcome by understanding the corresponding algorithms and analysis methods. The present work describes a physically unclonable functions taggant, in an aqueous-soluble ink, based on surface-enhanced Raman scattering of discrete self-assemblies of Au nanoparticles. Using this stealth nanobeacon, we detected a fingerprint-type Raman spectroscopy signal that we clearly identified even on a business card with a pigment mask such as copper-phthalocyanine printed on it. Accordingly, we have overcome the reverse engineering problem that is otherwise inherent to analogous anti-counterfeiting techniques. One can readily tailor the ink to various information needs and application requirements. Our stealth nanobeacon printing will be particularly useful for steganography and provide a sensitive fingerprint for anti-counterfeiting.
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