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The synthesis of newly modified CdTe quantum dots and their application for improvement of latent fingerprint detection

机译：新修饰的CdTe量子点的合成及其在潜在指纹检测中的应用

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Motivated by the urgent demand for the detection of latent fingerprints using fluorescence-based nanotechnology, this work was devoted to developing a simple synthetic approach to obtain positively charged CdTe QDs with enhanced fluorescence and affinity for the improvement of latent fingerprint detection. Through this synthetic method, the positively charged CdTe-COONH _3NH~+_3 QDs were successfully achieved by using hydrazine hydrate as both the surface stabilizer and pH adjuster during the preparation process. In comparison to the negatively charged CdTe-COO-QDs prepared by using sodium hydroxide as the pH adjuster, the CdTe-COONH _3NH~+_3 QDs showed enhanced fluorescence. The effectiveness of CdTe-COO-and CdTe-COONH_3NH~+_3 QDs for detection of latent fingerprints present on a large variety of smooth objects was systematically and comparatively studied. The results indicate that the detection of latent fingerprints by using CdTe-COONH_3NH ~+_3 QDs as fluorescent labeling marks was greatly enhanced, and more characteristic finger ridge details were detected and identified due to their enhanced affinity with latent fingerprints, in comparison to the detection by using CdTe-COO-QDs as fluorescent labeling marks. The CdTe-COONH_3NH~+_3 QDs show superior detection capability than the CdTe-COO-QDs, which greatly improves the applicability of CdTe QDs for practical application in latent fingerprint detection.
机译：出于对使用基于荧光的纳米技术检测潜在指纹的迫切需求的推动，这项工作致力于开发一种简单的合成方法，以获得具有增强的荧光和亲和力的带正电的CdTe QD，以改善潜在指纹检测。通过这种合成方法，在制备过程中使用水合肼作为表面稳定剂和pH调节剂，成功地实现了带正电荷的CdTe-COONH _3NH〜+ _3 QDs。与使用氢氧化钠作为pH调节剂制备的带负电的CdTe-COO-QD相比，CdTe-COONH _3NH〜+ _3 QD的荧光增强。系统地比较了CdTe-COO-和CdTe-COONH_3NH〜+ _3 QD对检测多种光滑物体上的潜在指纹的有效性。结果表明，与检测相比，使用CdTe-COONH_3NH〜+ _3 QDs作为荧光标记标记的潜在指纹的检测大大增强，并且由于其与潜在指纹的亲和力增强，可以检测和鉴定更多特征性的手指脊细节。通过使用CdTe-COO-QDs作为荧光标记。 CdTe-COONH_3NH〜+ _3 QD的检测能力优于CdTe-COO-QD，大大提高了CdTe QD在潜在指纹检测中的实用性。

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