Biomimetic nanopore for sensitive and selective detection of Hg(ii) in conjunction with single-walled carbon nanotubes

2014 ◽  
Vol 2 (37) ◽  
pp. 6371-6377 ◽  
Author(s):  
Qingfeng Zhai ◽  
Siqi Zhang ◽  
Hong Jiang ◽  
Qin Wei ◽  
Erkang Wang ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Single Walled Carbon Nanotubes ◽  
Detection Sensitivity ◽  
Selective Detection ◽  
Duplex Dna ◽  
Single Stranded Dna ◽  
Single Walled Carbon ◽  
Sensitivity And Selectivity ◽  
Walled Carbon Nanotubes

Through SWNTs, duplex DNA derived from folding of single-stranded DNA can be quantitated with Zr4+–PEI coated cone-shaped nanopore. With Hg2+ detection, sensitivity and selectivity based on this paradigm is guaranteed without probe immobilization.

scholarly journals Gas Biosensor Arrays Based on Single-Stranded DNA-Functionalized Single-Walled Carbon Nanotubes for the Detection of Volatile Organic Compound Biomarkers Released by Huanglongbing Disease-Infected Citrus Trees

Sensors ◽  
2019 ◽  
Vol 19 (21) ◽  
pp. 4795 ◽  
Author(s):  
Hui Wang ◽  
Pankaj Ramnani ◽  
Tung Pham ◽  
Claudia Chaves Villarreal ◽  
Xuejun Yu ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Uv Spectroscopy ◽  
Single Walled Carbon Nanotubes ◽  
Disease Diagnosis ◽  
Single Stranded Dna ◽  
Biosensor Arrays ◽  
Single Walled Carbon ◽  
Volatile Organic ◽  
Walled Carbon Nanotubes ◽  
Citrus Trees

Volatile organic compounds (VOCs) released by plants are closely associated with plant metabolism and can serve as biomarkers for disease diagnosis. Huanglongbing (HLB), also known as citrus greening or yellow shoot disease, is a lethal threat to the multi-billion-dollar citrus industry. Early detection of HLB is vital for removal of susceptible citrus trees and containment of the disease. Gas sensors are applied to monitor the air quality or toxic gases owing to their low-cost fabrication, smooth operation, and possible miniaturization. Here, we report on the development, characterization, and application of electrical biosensor arrays based on single-walled carbon nanotubes (SWNTs) decorated with single-stranded DNA (ssDNA) for the detection of four VOCs—ethylhexanol, linalool, tetradecene, and phenylacetaldehyde—that serve as secondary biomarkers for detection of infected citrus trees during the asymptomatic stage. SWNTs were noncovalently functionalized with ssDNA using π–π interaction between the nucleotide and sidewall of SWNTs. The resulting ssDNA-SWNT hybrid structure and device properties were investigated using Raman spectroscopy, ultraviolet (UV) spectroscopy, and electrical measurements. To monitor changes in the four VOCs, gas biosensor arrays consisting of bare SWNTs before and after being decorated with different ssDNA were employed to determine the different concentrations of the four VOCs. The data was processed using principal component analysis (PCA) and neural net fitting (NNF).

scholarly journals Translocation of Single-Stranded DNA Through Single-Walled Carbon Nanotubes

Science ◽  
2009 ◽  
Vol 327 (5961) ◽  
pp. 64-67 ◽  
Author(s):  
H. Liu ◽  
J. He ◽  
J. Tang ◽  
H. Liu ◽  
P. Pang ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Single Walled Carbon Nanotubes ◽  
Single Stranded Dna ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes

scholarly journals Adsorption and Desorption of Single-Stranded DNA from Single-Walled Carbon Nanotubes

2017 ◽  
Vol 12 (13) ◽  
pp. 1625-1634 ◽  
Author(s):  
Cameron J. Shearer ◽  
LePing Yu ◽  
Renzo Fenati ◽  
Alexander J. Sibley ◽  
Jamie S. Quinton ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Single Walled Carbon Nanotubes ◽  
Single Stranded Dna ◽  
Adsorption And Desorption ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes

Electrically triggered insertion of single-stranded DNA into single-walled carbon nanotubes

2006 ◽  
Vol 417 (4-6) ◽  
pp. 288-292 ◽  
Author(s):  
Takeru Okada ◽  
Toshiro Kaneko ◽  
Rikizo Hatakeyama ◽  
Kazuyuki Tohji
Keyword(s):  
Carbon Nanotubes ◽  
Single Walled Carbon Nanotubes ◽  
Single Stranded Dna ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes
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