采用柠檬酸钠-鞣酸还原法制备出胶体金,并用紫外可见分光光谱对胶体金粒径及形态进行了评价,结合Zeta电位分析了胶体金的稳定性,利用多重金属沉积法对玻璃表面新鲜的汗潜、油潜手印进行了显现.结果表明,合成的胶体金粒径为10～35m,且胶体金颗粒形态均一,稳定性强.多重金属沉积法具有选择性吸附强、背景污染小等特点,其显现效果与粉末法相当,甚至优于粉末法.
Colloidal gold is reductively prepared by sodium citrate-tannin,the size and morphology of gold is charaeterized by UV-visible spectrum,the stability of colloidal gold is evaluated by the zeta potentials.MMD is used for the development of fresh sweat and oil fingerprint on glass.The results show that the colloidal gold particles possess a diameter range of 10～35nm,and demonstrate uniform morphology,good time-dependent stability.MMD has advantages on selectively deposition and less contaminated on background.MMD is equal or better than powder.
参考文献
| [1] | Saunders G.Multimetal deposition technique for latent fingermark development[A].United States of America,1989 |
| [2] | Baschong W;Stierhof Y .Preparation,use and enlargement of ultra small gold particles in immunoelectron microscopy[J].Microscopy Res Techn,1998,42(01):66. |
| [3] | Schnetz B .La révélation des empreintes digitales par l'or colloidal:l'amplification du signal par des techniques biochimiques[D].Switzerland:Université de Lausanne,1999. |
| [4] | Schnetz B;Margot P .Technical note: latent fingermarks, colloidal gold and multimetal deposition (MMD). Optimisation of the method.[J].Forensic science international,2001(1):21-28. |
| [5] | Jones N;Lennard C;Stoilovie M et al.An evaluation of multimetal deposition Ⅱ[J].J Forensic Identif,2002,53(03):444. |
| [6] | 任俊;沈健;卢寿慈.颗粒分散科学与技术[M].北京:化学工业出版社,2005:35. |
| [7] | 曹茂盛;李大勇;莉天辅.纳米材料学[M].哈尔滨:哈尔滨工程大学出版社,2002:41. |
| [8] | Link, S.;El-Sayed, M.A.;Mohamed, M.B. .Simulation of the optical absorption spectra of gold nanorods as a function of their aspect ratio and the effect of the medium dielectric constant[J].The journal of physical chemistry. B, Materials, Surfaces, Interfaces & Biophysical,1999(16):3073-3077. |
| [9] | Link S;El-Sayed M A .Size and temperature dependence of the plasmon absorption of colloidal gold nanoparticles[J].Journal of Physical Chemistry B,1999,103:4212. |
| [10] | 彭剑淳,刘晓达,丁晓萍,付占江,王全立.可见光光谱法评价胶体金粒径及分布[J].军事医学科学院院刊,2000(03):211-212,237. |
| [11] | Jones N .Metal deposition techniques for the detection and enhancement of latent fingerprints on semi-porous surfaces[D].Sydney:University of Technology,2002. |
| [12] | Klabunde K J.纳米材料化学[M].北京:化学工业出版社,2004:109. |
| [13] | 尹晋津,许利剑,曾晓希,汤建新.生物检测用纳米金粒子还原制备方法比较[J].湖南工业大学学报,2008(01):104-108. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%