دانلود مقاله انگلیسی رایگان:بستر SERS nanocone  چین خورده انعطاف پذیر ناشی از به دام انداختن نور برای تشخیص مواد منفجره بسیار حساس - 2020
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  • Light trapping induced flexible wrinkled nanocone SERS substrate for highly sensitive explosive detection Light trapping induced flexible wrinkled nanocone SERS substrate for highly sensitive explosive detection
    Light trapping induced flexible wrinkled nanocone SERS substrate for highly sensitive explosive detection

    سال انتشار:

    2020


    عنوان انگلیسی مقاله:

    Light trapping induced flexible wrinkled nanocone SERS substrate for highly sensitive explosive detection


    ترجمه فارسی عنوان مقاله:

    بستر SERS nanocone چین خورده انعطاف پذیر ناشی از به دام انداختن نور برای تشخیص مواد منفجره بسیار حساس


    منبع:

    Sciencedirect - Elsevier - Sensors & Actuators: B. Chemical, 314 (2020) 128081. doi:10.1016/j.snb.2020.128081


    نویسنده:

    Rongke Gaoa,*, Xuefei Songa, Changbiao Zhana, Chaogui Wenga, Sheng Chenga, Kai Guob, Ning Mad, Huafang Changd, Zhongyi Guob, Lin-Bao Luoc, Liandong Yua,*


    چکیده انگلیسی:

    We reported an ultrasensitive TNT detection method via a novel light trapping induced wrinkled nanocone flexible SERS substrate, which was fabricated by colloidal lithography and oxygen plasma etching on transparent PET film. Especially, a set of nanowrinkles with 50−60 nm was found on the sidewall of nanocone after etching. By coating 30 nm gold film, this flexible SERS substrate provided uniform hot spots, which demonstrated high reproducibility and sensitivity. 4-ATP molecules based Meisenheimer complex, which is a well-known chargetransfer interaction between electron-poor TNT and electron-rich amino group, was taken to detect ultra-low concentration of TNT explosive. The Raman signal of TNT was significantly enhanced by charge-transfer, light trapping effect and coupled electromagnetic field. The detection sensitivity of TNT molecules was as low as 10−13mol/L, and show a good linear response in the range from 10−8 to 10−13mol/L. Consequently, by brushing this flexible SERS substrate onto a cloth bag, trace amount of TNT residues with concentration as low as 10-10mol/L can be easily analyzed. It is believed that the proposed highly sensitive and uniform flexible substrate provides a significant solution for trace analysis of TNT residue in criminal forensic, military and security check.
    Keywords: Nanocone | Nanowrinkle | Flexible materials | Light trapping | SERS


    سطح: متوسط
    تعداد صفحات فایل pdf انگلیسی: 9
    حجم فایل: 2499 کیلوبایت

    قیمت: رایگان


    توضیحات اضافی:




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