کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5031316 | 1470933 | 2018 | 7 صفحه PDF | دانلود رایگان |
- The detection limit of graphene DNA sensors with ultraclean surface can achieve 1Â pM.
- The sensitivity of the devices is 5 times higher than that prepared by common PMMA transfer process.
- The performance of the devices is 4 times better than liquid-gated FET decives.
The quality of graphene strongly affects the performance of graphene-based biosensors which are highly demanded for the sensitive and selective detection of biomolecules, such as DNA. This work reported a novel transfer process for preparing a residue-free graphene film using a thin gold supporting layer. A Hall effect device made of this gold-transferred graphene was demonstrated to significantly enhance the sensitivity (â 5 times) for hybridization detection, with a linear detection range of 1Â pM to 100Â nM for DNA target. Our findings provide an efficient method to boost the sensitivity of graphene-based biosensors for DNA recognition.
367
Journal: Biosensors and Bioelectronics - Volume 99, 15 January 2018, Pages 85-91