中文摘要：

发展了一种新的电化学共沉积氧化锌-氧化铜薄膜法来显现多种导电基底（不锈钢片、铝片、铜片、锌片、5角和1元的硬币）上的潜指纹的方法。该方法的原理是基于导电基底上潜指纹的嵴线区残留物具有电化学惰性,电化学共沉积反应选择性地发生在潜指纹的谷线区和没有潜指纹覆盖的导电基底上,这一过程导致基底上潜指纹的嵴线区和谷线区之间产生显著的颜色差异,最后得到具有较高对比度的潜指纹反像。从场发射电子扫描电镜图像和元素分析的结果确认,氧化锌-氧化铜薄膜主要沉积到了潜指纹的谷线区,而嵴线区上的沉积物较少。通过氧化锌-氧化铜薄膜的共沉积,导电基底上的潜指纹显现图像能够提供清晰的二级水平信息和部分三级水平信息。该方法具有操作简便、显现效率高、适用客体广的特点,是一种具有很好的实际应用前景的潜指纹显现方法。

英文摘要：

A novel method for developing latent fingermarks（ LFMs） on various conductive substrates（ stainless steel plate,aluminum sheet,zinc sheet,copper sheet,1 Yuan coin and 5 Jiao coin） through the electrochemical codeposition of zinc oxide-copper oxide（ Zn O-Cu O） composite films has been developed here. The principle of visualizing LFMs is that the electrochemical co-deposition process selectively occurs on the valley regions and bare conductive surfaces owing to electrochemical inert property of the residues left at the ridges areas,so a color difference between the ridge and valley areas is generated resulting in a high visual contrast of the LFMs. The FESEM images and elemental analysis results confirmed that the Zn O-Cu O composite films were electrochemically deposited on the valley regions of the LFMs rather than the ridge regions. Moreover,the visualization images of the LFMs originated from the deposition of Zn O-Cu O composite films could provide the clear second level details and partial third level details of the LFMs. This method is simple,high efficient and widely applicable in the visualization of the LFMs and would be a promising tool in the practical application.