Investigation on the Printed CNT-Film-Based Electrochemical Sensor for Detection of Liquid Chemicals

Noh, Jaeha; An, Sangsu; Lee, Changhan; Jiho, Chang; Lee, Snagtae; Lee, Moonjin; Seo, Dongmin

doi:10.3390/s21155179

Cited by 7 publications

(2 citation statements)

References 31 publications

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“…Further investigation by SEM turned out that HNO 3 treatment can not only densify the SWCNT network (Figure S8c,d, Supporting Information) but also enhance the adhesion between SWCNT and PET substrate (Figure S8e, Supporting Information), which was similar to previous findings. [32,33] Further, the radial breathing mode (RBM) is shown in Figure S6b (Supporting Information).…”

Section: Resultsmentioning

confidence: 99%

Floating Catalyst Chemical Vapor Deposition Patterning Nitrogen‐Doped Single‐Walled Carbon Nanotubes for Shape Tailorable and Flexible Micro‐Supercapacitors

Dong

Zhang

Liao

et al. 2023

Adv Funct Materials

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Micro-supercapacitors (MSCs) as high-power density energy storage units are designed to meet the booming development of flexible electronics, requiring simple and fast fabrication technology. Herein, a fast and direct solvent-free patterning method is reported to fabricate shape-tailorable and flexible MSCs by floating catalyst chemical vapor deposition (FCCVD). The nitrogen-doped single-walled carbon nanotubes (N-SWCNTs) are directly deposited on a patterned filter by FCCVD with designable patterns and facilely dry-transferred on versatile substrates. The obtained MSCs deliver an excellent areal capacitance of 3.6 mF cm −2 and volumetric capacitance of 98.6 F cm −3 at a scan rate of 5 mV s −1 along with excellent long-term cycle stability over 125 000 circles. Furthermore, the MSCs show good performance uniformity, which can be readily integrated via connection in parallel or series to deliver a stable high voltage (4 V with five serially connected devices) and large capacitance (5.1 mF with five parallel devices) at a scan rate of 100 mV s −1 , enabling powering the light emitting displays. Therefore, this method blazes the trail of directly preparing flexible, shape-customizable, and high-performance MSCs.

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Section: Resultsmentioning

confidence: 99%

Floating Catalyst Chemical Vapor Deposition Patterning Nitrogen‐Doped Single‐Walled Carbon Nanotubes for Shape Tailorable and Flexible Micro‐Supercapacitors

Dong

Zhang

Liao

et al. 2023

Adv Funct Materials

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show abstract

“…Carbon nanotubes (CNTs) are tubes composed of carbon atoms with distinctive intrinsic properties. These materials are renowned for their superior mechanical strength, electrical and thermal conductivities, and large surface-area-to-volume ratio [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 ]. The mechanical strength of CNTs surpasses that of steel by several times, and their electrical conductivity is comparable to that of metals such as copper.…”

Section: Introductionmentioning

confidence: 99%

A Study on the O2 Plasma Etching Method of Spray-Formed SWCNT Films and Their Utilization as Electrodes for Electrochemical Sensors

Kim,

Han,

Kim

2023

Sensors

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In this study, we analyzed the morphological changes and molecular structure changes on the surface of single-walled carbon nanotube (SWCNT) films during oxygen plasma (O2) etching of SWCNT surfaces formed by the spray method and analyzed their potential use as electrochemical electrodes. For this purpose, a SWCNT film was formed on the surface of a glass substrate using a self-made spray device using SWCNT powder prepared with DCB as a solvent, and SEM, AFM, and XPS analyses were performed as the SWCNT film was O2 plasma etched. SEM images and AFM measurements showed that the SWCNT film started etching after about 30 s under 50 W of O2 plasma irradiation and was completely etched after about 300 s. XPS analysis showed that as the O2 plasma etching of the SWCNT film progressed, the sp2 bonds representing the basic components of graphite decreased, the sp3 bonds representing defects increased, and the C–O, C=O, and COO peaks increased simultaneously. This result indicates that the SWCNT film was etched by the O2 plasma along with the oxygen species. In addition, electrochemical methods were used to verify the damage potential of the remaining SWCNTs after O2 plasma etching, including cyclic voltammetry, Randles plots, and EIS measurements. This resulted in a reversible response based on perfect diffusion control in the cyclic voltammetry, and an ideal linear curve in the Randles plot of the peak current versus square root scan rate curve. EIS measurements also confirmed that the charge transfer resistance of the remaining SWCNTs after O2 plasma etching is almost the same as before etching. These results indicate that the remaining SWCNTs after O2 plasma etching do not lose their unique electrochemical properties and can be utilized as electrodes for biosensors and electrochemical sensors. Our experimental results also indicate that the ionic conductivity enhancement by O2 plasma can be achieved additionally.

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Recent advances in CNTs-based sensors for detecting the quality and safety of food and agro-product

et al. 2023

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Investigation on the Printed CNT-Film-Based Electrochemical Sensor for Detection of Liquid Chemicals

Cited by 7 publications

References 31 publications

Floating Catalyst Chemical Vapor Deposition Patterning Nitrogen‐Doped Single‐Walled Carbon Nanotubes for Shape Tailorable and Flexible Micro‐Supercapacitors

Floating Catalyst Chemical Vapor Deposition Patterning Nitrogen‐Doped Single‐Walled Carbon Nanotubes for Shape Tailorable and Flexible Micro‐Supercapacitors

A Study on the O2 Plasma Etching Method of Spray-Formed SWCNT Films and Their Utilization as Electrodes for Electrochemical Sensors

Recent advances in CNTs-based sensors for detecting the quality and safety of food and agro-product

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