دانلود رایگان مقاله انگلیسی بیوسنسور حساس DNA تولید شده با نانوذرات طلا/پلی (پی-آمینو بنزوییک اسید) / الکترود اصلاح شده با نانولوله های کربنی به همراه ترجمه فارسی
عنوان فارسی مقاله | بیوسنسور حساس DNA تولید شده با نانوذرات طلا/پلی (پی-آمینو بنزوییک اسید) / الکترود اصلاح شده با نانولوله های کربنی |
عنوان انگلیسی مقاله | A sensitive DNA biosensor fabricated with gold nanoparticles/ploy (p-aminobenzoic acid)/carbon nanotubes modified electrode |
رشته های مرتبط | مهندسی مواد و شیمی، نانو شیمی، شیمی کاربردی، نانو مواد |
کلمات کلیدی | بیوسنسور دی ان ای، نانولوله های کربن چند دیواره، نانوذرات طلا، الکتروپلیمریزاسیون، رسوب الکتروشیمیایی |
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کیفیت ترجمه | کیفیت ترجمه این مقاله متوسط میباشد |
توضیحات | ترجمه این مقاله به صورت خلاصه انجام شده است. |
نشریه | الزویر – Elsevier |
مجله | کلوئید و سطوح B: رابط های زیستی |
سال انتشار | 2010 |
کد محصول | F809 |
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جستجوی ترجمه مقالات | جستجوی ترجمه مقالات |
فهرست مقاله: چکیده |
بخشی از ترجمه فارسی مقاله: 1- مقدمه 4.نتیجه گیری |
بخشی از مقاله انگلیسی: 1. Introduction Sequence-specific detection of nucleic acid targets has become increasingly important in disease diagnostics, drug screening, epidemic prevention, and environmental protection [1,2]. Various techniques have been developed for the detection of target DNA, including radio-chemical, quartz crystal microbalance, and electrochemistry method. Among these techniques, electrochemical DNA sensors have attracted significant research interests, due to its high sensitivity, small dimensions and low cost. To date, a variety of approaches have been explored in electrochemical detection of DNA hybridization [3–6]. Such sensors are commonly accomplished by using electroactive indicators [7–11], through enzyme amplified recognition [12], redox tages covalently bond to single-stranded DNA oligomers [13–17], nanoparticle [18–20] and electroactive beads [21] amplified signal. Detecting technology of those sensors generally are DPV [22], EIS [23,24], anodic stripping voltammetry (ASV) [25,26], and chronocoulometry (CC) [27]. Recently, several reviews about this field have been reported [28–34]. As is well known, the immobilization of DNA probes onto electrode surfaces is one of the key steps toward DNA sensor development. It has been well demonstrated that the DNA sensor performance (e.g., sensitivity, selectivity, and stability) is highlydependent on properties of immobilized DNA probes. Several methods for immobilizing DNA probes onto electrode surface have been reported, including physical adsorption, cross-linking and electrochemical polymerization. Because electrochemical polymerization can control film thickness, permeation and charge transport characteristics by adjusting the electrochemical parameters. So the electrochemical polymerization is one of the promising approaches to immobilize DNA probes, such as poly(pyrrole) [24], and the polymers have been proven to be a very suitable matrix for biosensors with fast response time, high sensitivity and great versatility in analytical tools [35,36]. Carbon nanotubes (CNTs) are novel nanomaterials, which have been widely recognized as an ideal support for fabricating electrochemical sensors. The CNT-based sensors have shown good sensitivity and selectivity. Recently, composite materials based on integration of CNTs and polymers have gained growing interest because they possess the properties of each component with a synergistic effect. Jiao and co-works have fabricated several electrochemical DNA biosensor based on polymer–CNT composite film modified electrode, including PDDA/poly (2,6-pyridinedicarboxylic acid)-MWCNTs [37], Poly(l-lysine)/SWCNT film [38]. Previously, we fabricated DNA biosensor based on Agnano/PPAA/CNT film modified electrode [39]. This DNA biosensors show good selectivity and sensitivity. p-Aminobenzoic acid (ABA) contains electron-rich N atom and high electron density of carbonyl group, and it is easy to be polymerized on glassy carbon electrode by CV. Jin and co-workers have ever applied poly (p-ABA) modified electrode to investigate an experimental Parkinsonian animal model [40]. This polymeric film modified electrode has been used to detect dopamine in the present of ascorbic acid [41]. 4. Conclusions In conclusion, the present study has introduced a strategy for DNA hybridization detection by employing AuNPs/PABA/ MWCNTs-COOH modified electrode. The experimental results show the DNA sensor has fast response, easy fabrication, and can detect three-base mismatched DNA sequence. |