Chemistry of extracting high-contrast invisible fingerprints from transparent and colored substrates using a novel phosphorescent label†,Analytical Methods

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Chemistry of extracting high-contrast invisible fingerprints from transparent and colored substrates using a novel phosphorescent label†
Analytical Methods ( IF 2.7 ) Pub Date : 2017-12-11 00:00:00 , DOI: 10.1039/c7ay02713c
G. Swati _{1,

2,

3,

4,

5} , Swati Bishnoi _{1,

2,

3,

4,

5} , Paramjeet Singh _{1,

2,

3,

4,

5} , Naina Lohia _{1,

2,

3,

4,

5} , Vishnu V. Jaiswal _{1,

2,

3} , M. K. Dalai _{1,

2,

3,

4,

5} , D. Haranath _{1,

2,

3,

4,

5}

Affiliation

Traditionally used fluorescent powders for developing invisible (latent) fingerprints involve complicated operation and show characteristics of auto-fluorescence interference and high toxicity. To overcome these serious drawbacks we report a novel application and facile methodology to extract high contrast fingerprints on non-porous and porous substrates using a chemically inert, visible light excitable, and nanosized SrAl₂O₄:Eu²⁺,Dy³⁺ phosphorescent label in the dark. The chemistry of non-covalent physisorption interaction between the long afterglow phosphor powder and sweat residue in fingerprints has been discussed in detail. Real-time fingerprint development on porous and non-porous substrates has also been performed.

中文翻译：

使用新型磷光标记从透明和彩色基材上提取高对比度不可见指纹的化学方法†

传统上用于形成隐形（潜在）指纹的荧光粉涉及复杂的操作，并表现出自发荧光干扰和高毒性的特征。为了克服这些严重的缺陷，我们报告了一种新颖的应用和简便的方法，可使用化学惰性，可见光可激发的纳米级SrAl ₂ O ₄：Eu ₂⁺，Dy ³⁺磷光标记物在无孔和多孔基材上提取高对比度指纹。在黑暗中。详细讨论了长余辉荧光粉和指纹中汗液残留物之间非共价物理吸附相互作用的化学过程。还已经在多孔和无孔基材上进行了实时指纹显影。

更新日期：2017-12-11

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