Chadwick Scott, Maynard Philip, Kirkbride Paul, Lennard Chris, Spindler Xanthe, Roux Claude
Centre for Forensic Science, University of Technology, Sydney, PO Box 123, Broadway, NSW 2007, Australia.
J Forensic Sci. 2011 Nov;56(6):1505-13. doi: 10.1111/j.1556-4029.2011.01846.x. Epub 2011 Jul 25.
In current casework, most post-cyanoacrylate stains rely on luminescence emission in the visible region (400-700 nm). While traditional stains such as rhodamine 6G work well under most circumstances, some surfaces may generate background luminescence under the same conditions. Detection in the near-infrared region (NIR > 700 nm) has shown to be effective in minimizing the interferences from such surfaces. The laser dye styryl 11 generated strongly luminescent fingermarks when applied after cyanoacrylate fuming on all surfaces tested. When compared to rhodamine 6G, the dye was superior only when viewed in the NIR. Styryl 11 was subsequently combined with rhodamine 6G, and the mixed stain formulation (named StaR 11 by the authors) induced stronger luminescence compared with styryl 11 alone with an ability to visualize in both the visible and NIR regions. Reliable and consistent results were obtained when using either styryl 11 alone or the STaR 11 mixture. The enhancement achieved did not otherwise vary depending on the source of the fingermark secretions. With visualization possible in both the visible and NIR regions, the styryl 11/rhodamine 6G mixture showed significant potential as a post-cyanoacrylate stain.
在当前的法医检验工作中，大多数氰基丙烯酸酯显现后的指纹污渍依赖于可见光区域（400 - 700纳米）的发光发射。虽然诸如罗丹明6G等传统显现剂在大多数情况下效果良好，但某些表面在相同条件下可能会产生背景发光。在近红外区域（NIR > 700纳米）进行检测已证明能有效减少此类表面的干扰。在所有测试表面上，氰基丙烯酸酯熏显后再应用激光染料苯乙烯基11，能产生强发光的指纹。与罗丹明6G相比，该染料仅在近红外光下观察时表现更优。随后，苯乙烯基11与罗丹明6G混合，混合显现剂配方（作者命名为StaR 11）与单独使用苯乙烯基11相比，能产生更强的发光，并且在可见光和近红外区域都能进行可视化观察。单独使用苯乙烯基11或使用StaR 11混合物时，都能获得可靠且一致的结果。所实现的增强效果在其他方面并不因指纹分泌物来源的不同而有所变化。由于在可见光和近红外区域都能进行可视化观察，苯乙烯基11/罗丹明6G混合物作为氰基丙烯酸酯显现后的指纹显现剂具有显著的潜力。
