光谱学与光谱分析, 2017, 37 (12): 3814, 网络出版: 2018-01-04  

ZnO/PAMAM G5.0的合成及其对“502”熏显处理指印的增显作用研究

Synthesis of ZnO/PAMAM G5.0 Nano Composite and Its Application on the Enhancement of Cyanoacrylate Pre-Treated Fingermark
作者单位
1 “2011计划”司法文明协同创新中心, 北京 100025
2 中国政法大学证据科学教育部重点实验室, 北京 100192
3 西安政治学院司法鉴定中心, 陕西 西安 710068
摘要
为了同时解决纳米指印显现试剂的灵敏度、 专属性以及安全性等方面的问题, 设计出氧化锌/聚酰胺-胺树形分子纳米复合材料(ZnO/PAMAM G5.0)的构架, 并探索了相关的合成条件、 产物的荧光性能及其在潜指印显现方面的应用前景。 实验结果表明, ZnO纳米颗粒可以在PAMAM G5.0树形分子的模板作用下控制生成; 合成产物在中波紫外光的激发作用下可以发出蓝色可见光; 当锌离子与树形分子的负载比介于10~100范围内时, 合成产物的荧光性能呈现先增长后下降的趋势, 并在负载比为60时得到最强光致发光效果; 对于经“502”熏显法固定后的潜指印样本, ZnO/PAMAM G5.0纳米复合材料可以通过胺解反应途径对其进行有效的增显。 ZnO/PAMAM G5.0纳米复合材料有望引领纳米指印显现试剂新的发展方向。
Abstract
In order to improve the sensitivity, specificity and safety of latent fingermark reagent based on nano technique, we designed the structure of ZnO/PAMAM G5.0 nano composites, explored its synthesis method, examined the fluorescent property of the newly developed nano composites and investigated its application on the enhancement of cyanoacrylate pre-treated fingermark. The results indicated that ZnO nano particles could be on-site synthesized under the control of PAMAM G5.0 dendrimer template. ZnO/PAMAM G5.0 nano composites emitted blue light under the excitation of long UV light. When the concentration ratios of Zn2+ and PAMAM dendrimers were between 10~100, the fluorescent intensity of ZnO/PAMAM G5.0 nano composites changed with respect to the increase of the concentration ratio. The highest fluorescent intensity could be reached when the concentration ratio was set at 60. Cyanoacrylate pre-treated fingermark could be enhanced by the amidation reaction between ZnO/PAMAM G5.0 nano composites and the ester terminal groups of cyanoacrylate polymer. The newly developed ZnO/PAMAM G5.0 nano composites obtain the fluorescent characteristics through non-toxic quantum dots and strengthen latent the fingermark development based on routine developing method. It will play an important role in the development of latent fingermark reagent based on nano technique in the near future.

王元凤, 宋朝朝, 段伟, 王文龙, 杜然. ZnO/PAMAM G5.0的合成及其对“502”熏显处理指印的增显作用研究[J]. 光谱学与光谱分析, 2017, 37(12): 3814. WANG Yuan-feng, SONG Zhao-zhao, DUAN Wei, WANG Wen-long, DU Ran. Synthesis of ZnO/PAMAM G5.0 Nano Composite and Its Application on the Enhancement of Cyanoacrylate Pre-Treated Fingermark[J]. Spectroscopy and Spectral Analysis, 2017, 37(12): 3814.

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