采用溶胶-凝胶法合成了铕掺杂SiO2复合胶体材料,制备了可用于潜在汗液手印显现的磁性粉末(简称EMO),实验了该粉末显现刑事现场常见的渗透性和非渗透性客体表面潜在手印的效果,考察了手印遗留时间、显出手印荧光稳定性等因素对应用的影响,给出了复合凝胶的紫外可见吸收光谱和荧光光谱,解释了显现手印的基本原理.实验证明,该功能型材料可作为潜在汗液手印的良好显现粉末.
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