Formation of quantum dots in single stranded DNA-wrapped single-walled carbon nanotubes

2010 ◽  
Vol 96 (2) ◽  
pp. 023104 ◽  
Author(s):  
Y. F. Li ◽  
T. Kaneko ◽  
R. Hatakeyama
Keyword(s):  
Carbon Nanotubes ◽  
Quantum Dots ◽  
Single Walled Carbon Nanotubes ◽  
Single Stranded Dna ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes

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).

CHARACTERIZATION OF QUANTUM DOTS, SINGLE WALLED CARBON NANOTUBES AND NICKEL OCTADECYLPHTHALOCYANINE CONJUGATES

2012 ◽  
Vol 11 (02) ◽  
pp. 1250022 ◽  
Author(s):  
SAMSON KHENE ◽  
TEBELLO NYOKONG
Keyword(s):  
Carbon Nanotubes ◽  
Quantum Dots ◽  
Ultra Violet ◽  
Single Walled Carbon Nanotubes ◽  
X Ray ◽  
Single Walled Carbon ◽  
Test Molecule ◽  
Electro Oxidation ◽  
Walled Carbon Nanotubes

In this work nickel octadecylphthalocyanine (NiPc(C10H21)8) and cadmium telluride quantum dots (QDs) capped with thioglycolic acid (TGA) are adsorbed on single walled carbon nanotubes (SWCNT) to form NiPc(C10H21)8 -SWCNT-QDs conjugate. X-ray photoelectron, ultra violet/visible and Raman spectroscopies are used to characterize the conjugate. SWCNT, poly- Ni(O)Pc(C10H21)8 , NiPc(C10H21)8 -SWCNT and NiPc(C10H21)8 -SWCNT-QDs complexes are used to modify glassy carbon electrode (GCE) and used for the electro-oxidation of pentachlorophenol as a test molecule. NiPc(C10H21)8 -SWCNT-QDs electrode gave the best detection current for pentachlorophenol.

Efficient electrochemical biosensors for ethynylestradiol based on the laccase enzyme supported on single walled carbon nanotubes decorated with nanocrystalline carbon quantum dots

2016 ◽  
Vol 8 (39) ◽  
pp. 7254-7259 ◽  
Author(s):  
T. C. Canevari ◽  
F. H. Cincotto ◽  
M. Nakamura ◽  
S. A. S. Machado ◽  
H. E. Toma
Keyword(s):  
Carbon Nanotubes ◽  
Quantum Dots ◽  
Single Walled Carbon Nanotubes ◽  
Carbon Quantum Dots ◽  
Electrochemical Biosensors ◽  
Hybrid Nanomaterial ◽  
Single Walled Carbon ◽  
Laccase Enzyme ◽  
Walled Carbon Nanotubes

A new hybrid nanomaterial based on single-walled carbon nanotubes incorporating nanocrystalline carbon quantum dots (SWCNT/C-dots) was developed.

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 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
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