کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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5401810 | 1392719 | 2012 | 6 صفحه PDF | دانلود رایگان |
A novel, sensitive, and convenient method for the determination of uracil and thymine by functionalized CdS nanoparticles (NPs) was proposed. CdS NPs were prepared by hydrothermal process and modified with thioglycollic acid (TGA) in aqueous solution. The fluorescence intensity of functionalized CdS NPs was quenched in the presence of uracil or thymine. Under optimal conditions, the relative fluorescence intensity (F0/F) was proportional to the concentration in the range of 9.0Ã10â6-1.0Ã10â4Â mol/L for uracil (r=0.9985) and 8.8Ã10â7-1.5Ã10â4Â mol/L for thymine (r=0.9960). The corresponding detection limits were 9.6Ã10â7Â mol/L and 3.2Ã10â7Â mol/L, respectively. In addition, the possible quenching mechanism was also discussed.
⺠Nano-CdS fluorescence probes were synthesized with good optical properties. ⺠Uracil and thymine were successfully detected by CdS fluorescence probes. ⺠Wide linear ranges and low detection limits were obtained.
Journal: Journal of Luminescence - Volume 132, Issue 1, January 2012, Pages 244-249