کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7229066 1470915 2018 21 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Nanoparticle stripe sensor for highly sensitive and selective detection of mercury ions
ترجمه فارسی عنوان
سنسور نانوذره برای تشخیص بسیار حساس و انتخابی یونهای جیوه
کلمات کلیدی
خط نانوذرات، تشخیص یون جیوه، هزینه حمل و نقل، سرفه خودمجموعه،
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
چکیده انگلیسی
Mercury and its compounds are emitted during industrial processes and are extremely harmful for eco systems and human health. Therefore, the detection of mercury ions (Hg2+) in our living and working environment is of great importance for the society and especially for the health of human beings. Here we demonstrate a proof of concept nanoparticle stripe sensor for highly sensitive and selective detection of Hg2+. This sensor is based on the changes of the charge transport between the neighboring nanoparticles in the nanoparticle stripe. The addition of Hg2+ induces a chelation between Hg2+ and carboxylic groups on the surface modification molecules and thus facilitates the charge transport, causing an increase of conductivity in the nanoparticle stripe. These nanoparticle stripes with a few layers in height and several micrometers in width possess large surface area, which increases their exposure to ions and improves the ability to detect Hg2+ at low concentrations. Besides, we studied the effect of molecular length on the sensitivity of the sensor. It is shown that the length of surface modification molecules is positively correlated with the sensitivity of the sensor. The fabricated devices exhibit a detection limit as low as 0.1 nM and a specific response towards Hg2+ ions.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Biosensors and Bioelectronics - Volume 117, 15 October 2018, Pages 450-456
نویسندگان
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