Advanced encryption based on fluorescence quenching of ZnO nanoparticles

	Advanced encryption based on fluorescence quenching of ZnO nanoparticles
	Liu, K. K.; C. X. Shan; G. H. He; R. Q. Wang; Z. P. Sun; Q. Liu; L. Dong and D. Z. Shen
	2017
发表期刊	Journal of Materials Chemistry C
卷号	5 期号:29
摘要	Encryption is of vital importance in both military and civil fields. Although there have been a few attempts to encrypt information and produce anti-counterfeiting techniques employing functional materials, it is still urgently needed to develop advanced encryption routes that cannot be cracked easily. This paper presents a simple strategy for advanced encryption based on the fluorescence quenching of ZnO nanoparticles (NPs) by acid and copper ions. In this strategy, certain patterns are printed onto a ZnO NP pre-coated paper using a CuCl2 aqueous solution as an ink to produce an invisible latent image, which is only visible under ultraviolet (UV) irradiation. For encryption, the patterns can be perfectly concealed by exposure to vinegar vapour, due to the dissolution of the ZnO NPs in acidic conditions, and decryption can be performed via neutralization in an ambient soda vapour environment and subsequent uniform re-coating with ZnO NPs. An additional matrix of pixels with encoded grey levels acquired by tuning the dose of CuCl2 is demonstrated to further enhance the anti-counterfeiting capability. A 4 x 4 micron matrix with a total combination of 1.67 x 10(8) codes has been enciphered in the latent patterns for demonstration, and this is a huge barrier for counterfeiting. The results reported in this paper provide a simple strategy for advanced encryption, and may inspire versatile applications in the fields of information security and anti-counterfeiting.
收录类别	sci ; ei
语种	英语
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/59077
专题	中科院长春光机所知识产出
推荐引用方式 GB/T 7714	Liu, K. K.,C. X. Shan,G. H. He,et al. Advanced encryption based on fluorescence quenching of ZnO nanoparticles[J]. Journal of Materials Chemistry C,2017,5(29).
APA	Liu, K. K..,C. X. Shan.,G. H. He.,R. Q. Wang.,Z. P. Sun.,...&L. Dong and D. Z. Shen.(2017).Advanced encryption based on fluorescence quenching of ZnO nanoparticles.Journal of Materials Chemistry C,5(29).
MLA	Liu, K. K.,et al."Advanced encryption based on fluorescence quenching of ZnO nanoparticles".Journal of Materials Chemistry C 5.29(2017).

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