Ứng dụng bán dẫn hiệu ứng trường các sợi nano carbon trong việc phát hiện nhanh dna

• Ngôn ngữ: vie
• Ký hiệu phân loại: 658.155 Management of income and expense
• Thông tin xuất bản: Hóa học, 2012
• Mô tả vật lý: 566-569
• Bộ sưu tập: Metadata
• ID: 645092

Tóm tắt

 This paper presents the development of DNA sensor based on a network carbon nanotubes field effect transistor (CNTFETs) for Escherichia coli bacteria detection. The DNA sequences were immobilized on single-walled carbon nanotubes of transistor CNTFETs by using absorption. The hybridization of the DNA probe sequences and complementary DNA strands was detected by electrical conductance change from the electron doping by DNA hybridization directly on the carbon nanotubes leading to the change in the metal-CNTs barrier energy through the modulation of the electrode work function of carbon nanotubes field effect transistor. The results showed that the response time of DNA sensor was approximately 1 min and the sensitivity of DNA sensor was at 0.565 uA/nM
  the detection limit of the sensor was about 1 pM of E. coli bacteria sample.