Hotspot generation for unique identification with nanomaterials.
Hotspot generation for unique identification with nanomaterials.
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DOI:
10.1038/s41598-020-79644-w
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发表时间:
2021-01-15
影响因子:
4.6
通讯作者:
Young RJ
中科院分区:
文献类型:
--
作者:
Abdelazim NM;Fong MJ;McGrath T;Woodhead CS;Al-Saymari F;Bagci IE;Jones AT;Wang X;Young RJ
Nanoscale variations in the structure and composition of an object are an enticing basis for verifying its identity, due to the physical complexity of attempting to reproduce such a system. The biggest practical challenge for nanoscale authentication lies in producing a system that can be assessed with a facile measurement. Here, a system is presented in which InP/ZnS quantum dots (QDs) are randomly distributed on a surface of an aluminium-coated substrate with gold nanoparticles (Au NPs). Variations in the local arrangement of the QDs and NPs is shown to lead to interactions between them, which can suppress or enhance fluorescence from the QDs. This position-dependent interaction can be mapped, allowing intensity, emission dynamics, and/or wavelength variations to be used to uniquely identify a specific sample at the nanoscale with a far-field optical measurement. This demonstration could pave the way to producing robust anti-counterfeiting devices.
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