Fluorescence development of fingerprints by combining conjugated polymer nanoparticles with cyanoacrylate fuming
| Autor: | Zizheng Wang, Yun Chen, Zhinan Fan, Li-Juan Fan, Rong liang Ma, Hong Chen |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Nanoparticle Nanotechnology 02 engineering and technology Conjugated system 010402 general chemistry 01 natural sciences law.invention Biomaterials Rhodamine 6G chemistry.chemical_compound Colloid and Surface Chemistry law Fingerprint chemistry.chemical_classification technology industry and agriculture Polymer 021001 nanoscience & nanotechnology Fluorescence 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials chemistry Cyanoacrylate Reagent 0210 nano-technology |
| Zdroj: | Journal of colloid and interface science. 528 |
| ISSN: | 1095-7103 |
| Popis: | Selecting appropriate developing methods/reagents or their combination to enhance the effect for fingerprint development is of great significance for practical forensic investigation. Ethyl-2-cyanoacrylate ester (superglue) fuming is a popular method for “in-situ” developing fingerprints in forensic science, followed by fluorescence staining to enhance the contrast of the fingerprint image in some occasion. In this study, a series of fluorescent poly(p-phenylene vinylene) (PPV) nanoparticles (NPs) in colloidal solution were successfully prepared and the emission color was tuned via a simple way. The fuming process was carried out using a home-made device. The staining was accomplished by immersing a piece of absorbent cotton into the solution of NPs, and then gently applied on the fumed fingerprints for several times. The PPV NPs were found to have a better developing effect than Rhodamine 6G when excited by 365 nm UV lamp. Different emission colors of NPs are advantageous in developing fingerprints on various substrates. Mechanism study suggested that the NPs were embedded in the porous structure of the superglue resin. In all, the combination of fuming method with the staining by conjugated polymer NPs has been demonstrated to be successful for fluorescent fingerprint development and be promising for more practical forensic applications. |
| Databáze: | OpenAIRE |
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