Exploration of functionalized CdTe nanoparticles for latent fingerprint detection
Exploration of functionalized CdTe nanoparticles for latent fingerprint detection
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DOI：
10.1166/jnn.2008.309
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发表时间：
2008-03-01
影响因子：
--
通讯作者：
Chen, Wei
中科院分区：
文献类型：
--
作者：
Cheng, Kwan H.;Ajimo, Jacob;Chen, Wei
探讨了不同粒径的水溶性光致发光纳米粒子用于潜在指纹检测的可能性。在该试验性研究中，使用了用巯基乙酸涂覆的绿色（582 nm）和红色（755 nm）CdTe纳米晶体。用这些纳米颗粒成功地标记了铝和玻璃表面上的潜在指纹，时间范围从30分钟到24小时。标记可能是由于纳米颗粒的表面羧基与指纹残留物中存在的生物材料的胺基之间的酰胺化反应。对于两个表面，582 nm发射纳米颗粒似乎比755 nm发射纳米颗粒更好地标记指纹脊。然而，755 nm发射纳米粒子能够瞄准指纹脊内的毛孔。除了高量子产率和光稳定性之外，这些纳米颗粒的可调谐发射波长、窄带宽、可定制的表面特性以及相对长的荧光衰减寿命对于未来开发用于法医应用的超灵敏、目标特异性、背景抑制的潜在指纹检测是有用的和必要的特征。
The potential of using water-soluble photoluminescent nanoparticles of different sizes for latent fingerprint detection has been explored. In this pilot study, green (582 nm) and red (755 nm) CdTe nanocrystals coated with thioglycolic acid were used. Latent fingerprints on aluminum and glass surfaces were successfully labeled with these nanoparticles for time periods ranging from 30 min to 24 h. The labeling is probably due to the amidation reaction between the surface carboxylic groups of the nanoparticles with the amine groups of the biomaterials present in the fingerprint residues. The 582 nm emitting nanoparticles appeared to better label the fingerprint ridges than did the 755 nm emitting ones for both surfaces. However, the 755 nm emitting nanoparticles were able to target the sweat pores within the ridges of the fingerprints. Other than high quantum yield and photostability, the tunable emission wavelength, the narrow bandwidth, the customizable surface characteristics, and the relatively long fluorescence decay lifetime of these nanoparticles are useful and necessary features for the future development of ultra-sensitive, target-specific, background suppressed latent fingerprint detection for forensic applications.