کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7138606 1462015 2018 50 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Metal nanoparticles-grafted functionalized graphene coated with nanostructured polyaniline 'hybrid' nanocomposites as high-performance biosensors
ترجمه فارسی عنوان
گرافن کارکردگرفته شده از نانوذرات فلزی با نانوکامپوزیتهای ترکیبی پلیانیلن نانوکامپوزیتی به عنوان حسگر بیوسنسور با عملکرد بالا
کلمات کلیدی
نانو کامپوزیت پلیانیلن نانوساختار، گرافن دارای عملکرد نیتروژن، نانوذرات فلزی، بی حس کردن، اختصاصی،
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
چکیده انگلیسی
Metal nanoparticles-grafted functionalized graphene nanosheets with nanostructured polyaniline (PANi) 'hybrid' nanocomposites for ascorbic acid (AA) sensing is developed. The versatility of the nanocomposite performance was corroborated by altering size and density of electrodeposited gold (AuNP) and silver (AgNP) nanoparticles on the graphene oxide; GO, thermally reduced GO; rGOth and nitrogenated functionalized graphene; NFG. These noble metal nanoparticles are selected due to higher electrical conductivity, facile synthesis, processability and antimicrobial nature. The multilayers (PANi|AgNP|GFN and PANi|AuNP|GFN) on fluoride-doped tin oxide (FTO) coated glass, graphite foil (GF) and graphene rod (GR) electrodes were tested that show increased electrical conductivity and reduced charge transfer resistance. We demonstrated ultrasensitive detection of AA analyte over full range (from 1 × 10−12 M to 10 × 10−3 M) with linear sensitivity 10 mA mM−1 cm−2 and excellent limit of detection < 1 pM having high signal-to-noise ratio following PANi|AuNP|NFG ≤ PANi|AgNP|NFG < AuNP|NFG < AgNP|NFG. Specificity of the biosensor is assessed by interfering species commonly found in blood serum i.e. glucose (Glu) and uric acid (UA). We attribute these findings to synergistically coupled metal nanoparticles and functionalized graphene promoted localized orbital re-hybridization and heterogeneously integration with PANi. These multilayer 'hybrid' nanocomposite electrodes are also useful for platinum-free electrocatalysis, pseudocapacitors and biofuel cell development.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sensors and Actuators B: Chemical - Volume 274, 20 November 2018, Pages 85-101
نویسندگان
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