کد مقاله کد نشریه سال انتشار مقاله انگلیسی ترجمه فارسی نسخه تمام متن
4765702 1423887 2018 8 صفحه PDF سفارش دهید دانلود کنید
عنوان انگلیسی مقاله ISI
A ratiometric nanosensor based on lanthanide-functionalized attapulgite nanoparticle for rapid and sensitive detection of bacterial spore biomarker
ترجمه فارسی عنوان
یک نانوسنسور ریاضی با استفاده از نانوذرات آتپالولیت لانتانیدها برای کشف سریع و حساس بیومارکرهای اسپور باکتریایی
کلمات کلیدی
Attapulgite؛ اسپور باکتریایی؛ نانوسنسور لانتانید؛ فلورسانس رادیومتری؛
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
چکیده انگلیسی


- A ratiometric fluorescent nanosensor based on lanthanide-functionalized attapulgite was designed and manufactured.
- The prepared nanoprobe show a real-time, on-site visual and highly sensitive detection for bacterial spore biomarker.
- The limit of detection of this nanoprobe is 9.8 nM, and the response time is rapid (about 10s).

Since the 2001 anthrax attacks, researchers have focused on the development of a bacterial spore biomarker detector with rapid response time and high sensitivity and selectivity. Hence, a ratiometric fluorescent nanosensor based on lanthanide-functionalized attapulgite (Atta) was designed and prepared using dye-doped Atta as an internal reference. Atta, which is famous because of Maya Blue, is a hydrated magnesium aluminum silicate present in nature, with pronounced adsorption and a large specific surface area rich in silicon hydroxyl. The adsorption of dye molecules benefits the formation of an internal reference with orange fluorescence. Meanwhile, silicon hydroxyl would be available for terbium (Tb3+) complex grafting, which favors the sensitization of the bacterial spore biomarker. With increasing dipicolinic acid (DPA) concentrations, energy transfer from DPA to Tb3+ gradually enhanced, thereby resulting in strong and predominant green fluorescence. The ratiometric fluorescence intensity is highly sensitive. It has a limit of detection of 9.8 nM, which is much lower than the infectious dosage of Bacillus anthracis spores (60 μM) for humans. The rapid response time (10s), high selectivity, and reliable and practical performances in actual applications make this ratiometric fluorescent nanosensor useful in the detection of biomarkers for various bacterial spores. Moreover, the reported construction of visual ratiometric detection system follows the sustainable development idea of ''from nature, for nature, into the nature'' and promotes the use of naturally renewable resources to produce promising and eco-friendly functional materials for various applications.

The functionalization of attapulgite nanorods using dye molecules and terbium (Tb3+) complex benefits the ratiometric fluorescence detection of dipicolinate.267

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Dyes and Pigments - Volume 148, January 2018, Pages 44-51
نویسندگان
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