Bioactive multiple-bent MWCNTs for sensitive and reliable electrochemical detection of picomolar-level C-reactive proteins

We present multiple-bent multi-walled carbon nanotubes (MWCNTs) that enable the picomolar detection of C-reactive protein (CRP), which is considered to be a promising biomarker for various diseases. The MWCNTs were grown via chemical vapor deposition repeating the asymmetric catalytic CNT growth on...

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Bibliographic Details
Published in:Nanoscale 2020-05, Vol.12 (18), p.998-999
Main Authors: Jang, Yeongseok, Kim, Hyojae, Yang, Seung Yun, Jung, Jinmu, Oh, Jonghyun
Format: Article
Language:English
Subjects:
Biological activity
Biomarkers
Biosensors
Blood Platelets - cytology
Blood Platelets - metabolism
C-Reactive Protein - analysis
Carbon
Chemical vapor deposition
Collagen - chemistry
Collagen - metabolism
Electrochemical analysis
Electrochemical Techniques - methods
Functional groups
Humans
Hydrophobic and Hydrophilic Interactions
Limit of Detection
Multi wall carbon nanotubes
Nanoparticles
Nanotubes, Carbon - chemistry
Nanotubes, Carbon - toxicity
Platelet Activation - drug effects
Platelets
Proteins
Silicon substrates
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Summary:We present multiple-bent multi-walled carbon nanotubes (MWCNTs) that enable the picomolar detection of C-reactive protein (CRP), which is considered to be a promising biomarker for various diseases. The MWCNTs were grown via chemical vapor deposition repeating the asymmetric catalytic CNT growth on atypical carbon nanoparticles that were generated by carbon coating on a silicon substrate. The multiple-bent MWCNTs with the carbon film (CF) possessed abundant hydrophilic functional groups (-COOH and -OH) at their bending sites, resulting in enhanced bioadhesion to collagen and platelets, compared to MWCNTs grown without a CF layer. Interestingly, the bent MWCNTs enhanced the reliability and sensitivity of the electrochemical detection at low CRP concentrations, possibly due to molecular affinity at the bent site. The bioactive bent MWCNTs can play a significant role in ultrasensitive biosensors to improve their detection limit, thereby achieving early detection and monitoring of CRP-related diseases such as cardiovascular events and melanoma. Multiple-bent MWCNTs with highly sensitive electrochemical impedance were introduced for the ultrasensitive and reliable detection of CRP.
ISSN:2040-3364
2040-3372
DOI:10.1039/c9nr10798c