Effect of Oxygen Plasma Treatment on Carbon Nanotube-Based Sensors

Ham, Seung Woo; Hong, Hyun Pyo; Kim, Joon Hyub; Min, Sung Jun; Min, Nam Ki

doi:10.1166/jnn.2014.10007

Cited by 17 publications

(17 citation statements)

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“…After each treatment, the oxidation/reduction currents peaks were enhanced. The values for oxidation current followed this trend: 8.16 × 10 −3 A for bare electrode, 1.03 × 10 −2 A for OP treated electrode, 1.50 × 10 −2 A for spray deposited SWCNTs on OP treated electrode, and 1.96 × 10 −2 A for OP treated SWCNTs on OP treated Besides the higher current generation, the OP treatment leads to the formation of carbonyl and/or carboxylic groups, as reported in the literature [28]. The presence of these groups can improve the immobilization of antibodies on the surface of SWCNTs.…”

Section: Surface Characterization and Electrochemical Properties Of Hsupporting

confidence: 79%

“…As shown in Figure 3a, increasing the OP power from 9 W to 24 W enhanced the oxidation/reduction current peaks reaching a maximum of 1.96 × 10 −2 A for an OP power of 24 W. This current enhancement can be related to a possible degradation of SDS from SWCNTs network. By further increasing OP power from 24 W to 39 W, the generation of oxidation/reduction current was reduced, potentially due to the chemical etching of SWCNTs at high power (as previously indicated by Ham et al 2014) [28], as well as due to the increase in defect density on the SWCNTs surface [34].…”

Section: Surface Characterization and Electrochemical Properties Of Hmentioning

confidence: 64%

“…. Besides the higher current generation, the OP treatment leads to the formation of carbonyl and/or carboxylic groups, as reported in the literature [28]. The presence of these groups can improve the immobilization of antibodies on the surface of SWCNTs.…”

Section: Surface Characterization and Electrochemical Properties Of Hmentioning

confidence: 66%

“…In addition, the surface morphology of the electrodes and the SWCNTs network was characterized by atomic force microscope (AFM). To overcome the hydrophobicity of the SWCNTs [28], a second OP treatment was performed on the full sensor layout after spray deposition of SWCNTs on the WE, using a 6 cm 3 /min flow rate at a constant pressure of 0.4 mbar, and a power of 24 W for 30 s.…”

Section: Synthesis Spray Deposition and Op Treatment Of Swcntsmentioning

confidence: 99%

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Flexible and Printed Electrochemical Immunosensor Coated with Oxygen Plasma Treated SWCNTs for Histamine Detection

et al. 2020

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Heterocyclic amine histamine is a well-known foodborne toxicant (mostly linked to “scombroid poisoning”) synthesized from the microbial decarboxylation of amino acid histidine. In this work, we report the fabrication of a flexible screen-printed immunosensor based on a silver electrode coated with single-walled carbon nanotubes (SWCNTs) for the detection of histamine directly in fish samples. Biosensors were realized by first spray depositing SWCNTs on the working electrodes and by subsequently treating them with oxygen plasma to reduce the unwanted effects related to their hydrophobicity. Next, anti-histamine antibodies were directly immobilized on the treated SWCNTs. Histamine was detected using the typical reaction of histamine and histamine-labeled with horseradish peroxidase (HRP) competing to bind with anti-histamine antibodies. The developed immunosensor shows a wide linear detection range from 0.005 to 50 ng/mL for histamine samples, with a coefficient of determination as high as 98.05%. Average recoveries in fish samples were observed from 96.00% to 104.7%. The biosensor also shows good selectivity (less than 3% relative response for cadaverine, putrescine, and tyramine), reproducibility, mechanical and time stability, being a promising analytical tool for the analysis of histamine, as well as of other food hazards.

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Section: Surface Characterization and Electrochemical Properties Of Hsupporting

confidence: 79%

Section: Surface Characterization and Electrochemical Properties Of Hmentioning

confidence: 64%

Section: Surface Characterization and Electrochemical Properties Of Hmentioning

confidence: 66%

Section: Synthesis Spray Deposition and Op Treatment Of Swcntsmentioning

confidence: 99%

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Flexible and Printed Electrochemical Immunosensor Coated with Oxygen Plasma Treated SWCNTs for Histamine Detection

et al. 2020

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“…Besides, the sensitivity and selectivity of carbon allotrope-based sensors can also be further enhanced by proper surface treatment or ion doping. In a work by Ham et al [226], it was reported that oxygen plasma treatment on CNTs improved the immuno-sensing detection limit by almost 1000 times when compared to the standard ELISA assay. On the other hand, non-treated CNTs exhibit no detectable signal.…”

Section: Future Outlookmentioning

confidence: 99%

Carbon Allotrope-Based Optical Fibers for Environmental and Biological Sensing: A Review

Yap

Chan

Tjin

et al. 2020

Sensors

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Recently, carbon allotropes have received tremendous research interest and paved a new avenue for optical fiber sensing technology. Carbon allotropes exhibit unique sensing properties such as large surface to volume ratios, biocompatibility, and they can serve as molecule enrichers. Meanwhile, optical fibers possess a high degree of surface modification versatility that enables the incorporation of carbon allotropes as the functional coating for a wide range of detection tasks. Moreover, the combination of carbon allotropes and optical fibers also yields high sensitivity and specificity to monitor target molecules in the vicinity of the nanocoating surface. In this review, the development of carbon allotropes-based optical fiber sensors is studied. The first section provides an overview of four different types of carbon allotropes, including carbon nanotubes, carbon dots, graphene, and nanodiamonds. The second section discusses the synthesis approaches used to prepare these carbon allotropes, followed by some deposition techniques to functionalize the surface of the optical fiber, and the associated sensing mechanisms. Numerous applications that have benefitted from carbon allotrope-based optical fiber sensors such as temperature, strain, volatile organic compounds and biosensing applications are reviewed and summarized. Finally, a concluding section highlighting the technological deficiencies, challenges, and suggestions to overcome them is presented.2 of 43 of target molecules or physical parameters. In some instances, surface-modified carbon allotropes also permit multi-parameter detection capabilities of carbon allotrope-based OFS [7]. As such, an insight into the recent advances of carbon allotrope-based OFS can serve as a guideline to develop an effective detection approach for emerging real-world applications. Many review articles on carbon allotrope-based OFS mainly focus on a single type of carbon allotrope and the fundamental theory of carbon allotrope-based OFS [8,9]. Thus, this comprehensive review article encompasses the properties, preparation, sensing mechanisms, nanocoating deposition techniques, physical and biochemical sensing applications. This review aims to highlight the recent research work on carbon allotrope-based OFS that will serve as a reference guide for researchers to develop optimal detection approaches for physical parameters or trace level monitoring of chemical and biomolecules. Four groups of carbon allotropes, including carbon nanotubes (CNT), carbon dots (CDs), graphene, and nanodiamonds (NDs), will be studied. Commonly adopted synthesis approaches, classification of various deposition techniques for the integration of carbon allotropes as the thin film coating of OFS as well as numerous examples of these carbon allotrope-based OFS will also be outlined.

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Recent Advances in the Applications of Carbon Nanostructures on Optical Sensing of Emerging Aquatic Pollutants

et al. 2022

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In recent years, optical sensing based on nanomaterials has emerged as a prospective strategy for monitoring environmental pollution in water. In this context, carbon nanostructures have received increasing attention due to their unique optoelectronic and physiochemical properties. To this end, nanocarbon such as carbon nanotubes, graphene, and carbon dots have been used to develop proof‐of‐concept opto‐chemical sensors for emerging aquatic contaminants, including pesticides, bacterial pathogens, and pharmaceuticals residues. These optical sensors have attracted significant research interest in nanotechnology, material science, and the detection of aquatic pollutants. However, the practical application for detecting contaminants is still limited because of cost‐effectiveness, sensitivities, and selectivity toward the diverse pollutants. This review examines the current trends and challenges in designing and applying carbon nanostructure‐based optical sensors for detecting aquatic contaminants. Finally, a critical perspective on the field and future research directions is provided.

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Effect of Oxygen Plasma Treatment on Carbon Nanotube-Based Sensors

Cited by 17 publications

References 0 publications

Flexible and Printed Electrochemical Immunosensor Coated with Oxygen Plasma Treated SWCNTs for Histamine Detection

Flexible and Printed Electrochemical Immunosensor Coated with Oxygen Plasma Treated SWCNTs for Histamine Detection

Carbon Allotrope-Based Optical Fibers for Environmental and Biological Sensing: A Review

Recent Advances in the Applications of Carbon Nanostructures on Optical Sensing of Emerging Aquatic Pollutants

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