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
期刊:
影响因子:
4.6
通讯作者:
Young RJ
Young RJ
中科院分区:
综合性期刊3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

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由于试图复制这样一个系统的物理复杂性,物体结构和成分的纳米级变化是验证其身份的诱人基础。纳米级认证的最大实际挑战在于生产一个可以通过简单测量进行评估的系统。这里,提出了一种系统,其中InP/ZnS量子点(QD)随机分布在具有金纳米颗粒(Au NP)的铝涂覆的衬底的表面上。量子点和纳米粒子的局部排列的变化导致它们之间的相互作用,这可以抑制或增强量子点的荧光。这种位置相关的相互作用可以被映射,允许强度,发射动力学,和/或波长变化被用来唯一地识别在纳米级与远场光学测量的特定样品。这一演示可以为生产强大的防伪设备铺平道路。
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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发表时间: 2012-04-01
期刊: NANO LETTERS
影响因子: 10.8
作者:
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基于激发选择的灯笼发光的成像的光学认证系统。
DOI: 10.1126/sciadv.1701384
发表时间: 2018-01
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影响因子: 13.6
作者:
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