巯基丁二酸修饰的碲化镉量子点溶液显现不同客体表面潜指纹

摘要

利用具有宽且连续的荧光激发光谱和窄且对称的荧光发射光谱的水溶性巯基丁二酸修饰的碲化镉量子点溶液,成功显现了多种客体表面的潜指纹,且1～3s即可得到良好效果.该材料成功显现了水浸客体和粘连客体表面的潜指纹,而且在显现连续按捺产生的微弱指纹时展现出了优良的灵敏度.同龙胆紫、罗丹明6G和巯基乙酸修饰的CdTe量子点溶液相比,该溶液拥有更快的显现速度和更好的显现效果.%Prominent fingermarks were obtained within 1～3 seconds after developed by the water-soluble mercaptosuccinic acid ( MSA) modified CdTe quantum dots ( QDs) with a wide-continuous excitation spectra and a narrow-symmetric emission spectra on various substrates. Latent fingermarks on water-immersed substrate and sticky adhesive tape were developed successfully. High sensitivity was also obtained on the development of latent fingermarks pressed continuously with the same finger. Compared with methyl violet, rhodamine 6G and mercaptoacetic acid(TGA) modified CdTe QDs, the MSA modified CdTe QDs showed the fastest developing speed and the best fingermarks quality.