基于SrAl<sub>2</sub>O<sub>4</sub>：Eu,Dy,La长余辉发光材料的手印无背景显现研究

引用本文: 倪龙, 王猛, 朱中旭, 李明, 袁传军, 吴建. 基于SrAl₂O₄：Eu,Dy,La长余辉发光材料的手印无背景显现研究[J]. 分析化学, 2022, 50(1): 103-111. doi: 10.19756/j.issn.0253-3820.210563 shu

Citation: NI Long, WANG Meng, ZHU Zhong-Xu, LI Ming, YUAN Chuan-Jun, WU Jian. Background-Free Development of Latent Fingerprints Using SrAl₂O₄: Eu,Dy,La Afterglow Luminescence Materials[J]. Chinese Journal of Analytical Chemistry, 2022, 50(1): 103-111. doi: 10.19756/j.issn.0253-3820.210563 shu

基于SrAl₂O₄：Eu,Dy,La长余辉发光材料的手印无背景显现研究

倪龙 ^1, ,
王猛 ^{1,2,
,} ,
朱中旭 ^1, ,
李明 ^1,2, ,
袁传军 ^1,2, ,
吴建 ^{3,
,}

1.
中国刑事警察学院刑事科学技术学院, 沈阳 110035;
2.
中国刑事警察学院新时代犯罪治理研究中心, 沈阳 110035;
3.
中国科学院宁波材料技术与工程研究所, 宁波 315201

通讯作者: 王猛,E-mail:mengwang@alum.imr.ac.cn; 吴建,E-mail:jwu@nimte.ac.cn

基金项目:
国家自然科学基金项目（Nos.21205139，21802169）、辽宁省教育厅科学研究经费项目（No.LJKZ0068）、辽宁省2020年度"百千万人才工程"项目和中国刑事警察学院2021年度研究生创新能力提升项目（No.2021YCYB32）资助。

摘要: 以Al （NO₃）₃和Sr （NO₃）₂以及硝酸稀土为氧化剂、尿素为还原剂和燃料、H₃BO₃为助熔剂，采用燃烧法在较低温度下一步反应制备出SrAl₂O₄：Eu，Dy，La长余辉发光材料，优化了炉温、尿素用量、H₃BO₃用量和La³⁺掺杂浓度等制备条件。采用扫描电子显微镜、X-射线衍射谱、紫外-可见吸收光谱和荧光光谱分别对材料的微观形貌、晶体类型、紫外吸收以及发光性能进行了表征。结果表明，制备的长余辉发光材料为微米级多面体形状，晶体类型为纯单斜SrAl₂O₄晶型且结晶性能良好，在252和334 nm处出现明显的紫外吸收峰，在365 nm激发波长下，514 nm处出现了较强的荧光发射峰。采用365 nm紫外光持续照射此长余辉发光材料30 s，在关闭光源后仍能观察到明亮的绿色发光。将长余辉发光粉末应用于一系列光滑客体表面潜在手印的无背景显现，详细考察了手印显现的对比度、灵敏度和选择性。结果表明，经长余辉发光模式增强处理的手印，其显现信号与背景噪声之间的对比反差强烈，乳突纹线的各级特征反应清晰明显，显现材料与乳突纹线之间的特异性吸附较强，具有对比度强、灵敏度高以及选择性好等优点。基于长余辉发光材料的手印显现方法特别适用于背景颜色复杂及荧光性能强烈的客体表面潜在手印的高质量、无背景显现，具有效果优良、操作简单、适用广泛以及针对性强等特点。

关键词:

English

Background-Free Development of Latent Fingerprints Using SrAl₂O₄: Eu,Dy,La Afterglow Luminescence Materials

NI Long ^1, ,
WANG Meng ^{1,2,
,} ,
ZHU Zhong-Xu ^1, ,
LI Ming ^1,2, ,
YUAN Chuan-Jun ^1,2, ,
WU Jian ^{3,
,}

1.
College of Forensic Sciences, Criminal Investigation Police University of China, Shenyang 110035, China;
2.
Research Centre of Crime Governance in the New Era, Criminal Investigation Police University of China, Shenyang 110035, China;
3.
Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China

Corresponding author: WANG Meng, ; WU Jian,

Received Date: 11 June 2021
Revised Date: 03 September 2021
Fund Project:
Supported by the National Natural Science Foundation of China (Nos.21205139, 21802169), the Scientific Research Fund Project from Educational Department of Liaoning Province, China (No.LJKZ0068), Liaoning BaiQianWan Talents Program in 2020, and the Innovation Ability Enhancement Project of Postraduates from Criminal Investigation Police University of China (No.2021YCYB32).

Abstract: SrAl₂O₄:Eu,Dy,La afterglow luminescence materials were prepared via a one-step combustion approach at a relatively low temperature by using aluminum nitrate, strontium nitrate and rare earth nitrate as oxidants, carbamide as reductants and fuels, and boric acid as fluxing agents. The preparation conditions including furnace temperature, amount of carbamide, amount of boric acid, and doping concentrations of La³⁺ ions were optimized. Then, the micromorphology, crystal structure, ultraviolet absorption property, and luminescence performance of as-prepared materials were characterized by scanning electron microscopy, X-ray diffraction pattern, ultraviolet-visible spectrum, and fluorescence emission spectrum, respectively. The prepared materials were polyhedral in shape with micron size, and monoclinal in phase with good crystallinity, which could emit strong luminescence at 514 nm under excitation of 252 or 334 nm ultraviolet light. After excited with 365 nm long-wavelength ultraviolet light for 30 s and then removing the excitation source, these materials could maintain strong green emission in dark field. Finally, the afterglow luminescence powders were applied for background-free development of latent fingerprints on various smooth substrates. The contrast, sensitivity and selectivity in fingerprint development were discussed in detail. After enhancing by afterglow luminescence treatment, the contrast between the developing signal and background noise were strong, all the detailed features of papillary ridges were obvious, and the adsorption between the developing powders and papillary ridges were specific, showing prominent advantages such as strong contrast, high sensitivity and good selectivity. Experimental results showed that, the method proposed here based on afterglow luminescence effect could achieve a high performance in background-free development of latent fingerprints on common substrates with smooth surface, especially on substrates with complex colors as well as strong fluorescence, exhibiting easy operability, high efficiency, and wide applicability.

Key words:

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通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

基于SrAl₂O₄：Eu,Dy,La长余辉发光材料的手印无背景显现研究

通讯作者: 王猛,E-mail:mengwang@alum.imr.ac.cn; 吴建,E-mail:jwu@nimte.ac.cn

English

Background-Free Development of Latent Fingerprints Using SrAl₂O₄: Eu,Dy,La Afterglow Luminescence Materials

Corresponding author: WANG Meng, ; WU Jian,

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通讯作者: 陈斌, bchen63@163.com

中国化学会秘书处

基于SrAl2O4：Eu,Dy,La长余辉发光材料的手印无背景显现研究

通讯作者: 王猛,E-mail:mengwang@alum.imr.ac.cn; 吴建,E-mail:jwu@nimte.ac.cn

English

Background-Free Development of Latent Fingerprints Using SrAl2O4: Eu,Dy,La Afterglow Luminescence Materials

Corresponding author: WANG Meng, ; WU Jian,

CCS Chemistry：嵌段共聚物自组装成 “三明治”二维有机材料，实现纳米级压力传感功能

CCS Chemistry：颜徐州、鲍哲南： 你的皮肤可能是一片SPMs

CCS Chemistry：工作高效不疲劳，只须让催化剂动起来

CCS Chemistry：静电组装导向聚合- 聚电解质纳米凝胶量化制备新策略

CCS Chemistry：金黄色葡萄球菌醛基脱氢酶是如何识别特异性底物的？

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通讯作者: 陈斌, bchen63@163.com

中国化学会秘书处

基于SrAl₂O₄：Eu,Dy,La长余辉发光材料的手印无背景显现研究

Background-Free Development of Latent Fingerprints Using SrAl₂O₄: Eu,Dy,La Afterglow Luminescence Materials

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