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.

选择合适的显影方法/试剂或其组合以增强指纹显影的效果对实际的法医研究具有重要意义。2-氰基丙烯酸乙酯（强力胶）发烟是法医科学中“现场”开发指纹的一种常用方法，然后在某些情况下进行荧光染色以增强指纹图像的对比度。在这项研究中，一系列的荧光聚（p成功制备了胶体溶液中的亚苯基亚乙烯基）（PPV）纳米粒子（NPs），并通过一种简单的方法来调节发射颜色。发烟过程是使用自制设备进行的。将一块吸收性棉浸入NP溶液中，然后将其轻轻涂在熏制的指纹上数次，即可完成染色。当被365 nm紫外灯激发时，发现PPV NPs比若丹明6G具有更好的显影效果。NP的不同发射颜色有利于在各种基板上显影指纹。机理研究表明，NPs嵌入在超级胶树脂的多孔结构中。在所有，