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Title: Hall effect biosensors with ultraclean graphene film for improved sensitivity of label-free DNA detection
Authors: Phan, Thị Kim Loan
Vũ, Thanh Trà
Yu, Aimin
Fu, Li
Wei, Qiuping
Li, Xiaoqing
Ye, Chen
Wu, Dongqin
Li, Lain-Jong
Lin, Cheng-Te
Keywords: Graphene biosensors
DNA hybridization
Halleff ect measurement
Ultraclean surface
Gold-transfer method
Issue Date: 2017
Series/Report no.: Biosensors and Biolectronics;99 .- p.85-91
Abstract: 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 (≈ 5 times) for hybridization detection, with a linear detection range of 1 pM to 100 nM for DNA target. Our findings provide an effcient method to boost the sensitivity of graphene-based biosensors for DNA recognition.
Appears in Collections:Tạp chí quốc tế

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