Electrical and Chemical Sensing Properties of a Printed Indium-Tin-Oxide Film for the Detection of Hazardous and Noxious Substances

Choi, Jun Seck; Ko, Dong Wan; Seo, Jun Young; Nho, Jae Ha; Chang, Jae-Soo; Lee, Sang Tae; Jung, Jung-yeul; Lee, Moon Jin

doi:10.3938/jkps.76.1005

Cited by 6 publications

(4 citation statements)

References 14 publications

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“…This simulation study was carried out via open source pyPENELOPE Monte Carlo code. As reported in [8] and relevant works in [24,25], the first layer was a 1 micrometre (µm) thick gold electrode, the second layer was a 10 μm-thick passive layer of C-type perylene, the third layer was 50 μm-thick irradiation sensing layers of PbO, the fourth layer was 0.5 μm-thick indium tin oxide, and the last base layer was 100 μm-thick polyester substrates. These structures were designed by using the user-friendly interface of the pyPENELOPE software.…”

Section: Methodsmentioning

confidence: 89%

An investigation on quantitative detector characteristics of novel flexible skin dosimeter using Monte Carlo simulation method

Kaya

2022

Journal of New Results in Science

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Novel lead oxide-based flexible dosimeters with superior performance were experimentally tested for electron therapy. However, absorbed/transmitted primary particle fraction and secondary radiation distribution from the dosimeter surface have not been reported. These features should be specified to improve the dosimeter’s reliability for medical applications. Hence, the absorbed primary particle fraction, transmitted particle and secondary radiations distributions of lead oxide-based flexible skin dosimeter under the incident 6 MeV electron radiation have been investigated by pyPenelope Monte Carlo Simulation. The results have demonstrated that the generated secondary irradiation probabilities are not significantly high to enhance the therapeutic dose abnormally. In addition, the angular distribution of the scattered secondary irradiations is low. No abnormal changes were observed in the fraction and energy distribution of the transmitted primary electrons. Hence, it can be concluded that the designed structure has promising potential to be used as dosimeters in electron beam therapy.

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Section: Methodsmentioning

confidence: 89%

An investigation on quantitative detector characteristics of novel flexible skin dosimeter using Monte Carlo simulation method

Kaya

2022

Journal of New Results in Science

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“…A flexible indium tin oxide (ITO) film (polyester) substrate was used as the bottom electrode, with ultrasonic cleaning performed for 30 min to remove foreign substances [ 14 ]. Afterwards, the photoconductor material was prepared by mixing a T-2 binder (silicone rubber) with powdered PbO and HgO (Kojundo Chemical Laboratory Inc., Japan) with purities of 99.999% at a mixing ratio of 4:1.…”

Section: Experimental Methodsmentioning

confidence: 99%

Evaluation of monoxide film-based dosimeters for surface dose detection in electron therapy

et al. 2021

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Generally, electron therapy is applied to tumors on or close to the skin surface. However, this causes a variety of skin-related side effects. To alleviate the risk of these side effects, clinical treatment uses skin dosimeters to verify the therapeutic dose. However, dosimeters suffer from poor accuracy, because their attachment sites are approximated with the help of naked eyes. Therefore, a dosimeter based on a flexible material that can adjust to the contours of the human body is required. In this study, the reproducibility, linearity, dose-rate dependence, and percentage depth ionization (PDI) of PbO and HgO film-based dosimeters are evaluated to explore their potential as large-scale flexible dosimeters. The results demonstrate that both dosimeters deliver impressive reproducibility (within 1.5%) and linearity (≥ 0.9990). The relative standard deviations of the dose-rate dependence of the PbO and HgO dosimeters were 0.94% and 1.16% at 6 MeV, respectively, and 1.08% and 1.25% at 9 MeV, respectively, with the PbO dosimeter outperforming the 1.1% of existing diodes. The PDI analysis of the PbO and HgO dosimeters returned values of 0.014 cm (–0.074 cm) and 0.051 cm (–0.016 cm), respectively at 6 MeV (9 MeV) compared to the thimble chamber and R50. Therefore, the maximum error of each dosimeter is within the allowable range of 0.1 cm. In short, the analysis reveals that the PbO dosimeter delivers a superior performance relative to its HgO counterpart and has strong potential for use as a surface dosimeter. Thus, flexible monoxide materials have the necessary qualities to be used for dosimeters that meet the requisite quality assurance standards and can satisfy a variety of radiation-related applications as flexible functional materials.

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“…(12) We demonstrated its ability to detect oils (13) and hazardous chemicals. (14) Films using ITO nanoparticles showed a higher chemical stability in water than those using other metal oxides. (15) Moreover, a recent result confirmed the capability of an ITO sensor to detect ethanol concentrations as low as 619 ppb.…”

Section: Introductionmentioning

confidence: 93%

Performance Improvement of Indium Tin Oxide Electrochemical Sensor by Mixing Carbon Black

Lee,

An,

Cho

et al. 2024

Sensors and Materials

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We studied a method of implementing an electrochemical sensor with high response speed using a film made of metal oxide nanoparticles. The optimal conditions for sensor production were estimated by calculating the sensor's response when the bulk and surface resistances of the film changed. We also implemented a new manufacturing process to fabricate the sensor. To achieve high response speed, an ITO:CB film was produced by mixing ITO nanoparticles and carbon black (CB) powder. Depending on the CB content of the ITO:CB film, the response time of the sensor continued to decrease from 337 s (CB = 0 wt%) to 2 s (CB = 50 wt%). However, even in this case, a continuous decrease in response intensity was observed as well. Therefore, to ensure high response speed and appropriate response intensity, a new process of oxygen ashing the film surface was introduced. As a result, it was possible to secure high response intensity and high response speed at CB contents up to 30 wt%. On the basis of these results, we confirmed that CB mixing and surface oxygen ashing can improve both the response intensity and speed of sensors using metal oxide nanoparticle films.

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Electrical and Chemical Sensing Properties of a Printed Indium-Tin-Oxide Film for the Detection of Hazardous and Noxious Substances

Cited by 6 publications

References 14 publications

An investigation on quantitative detector characteristics of novel flexible skin dosimeter using Monte Carlo simulation method

An investigation on quantitative detector characteristics of novel flexible skin dosimeter using Monte Carlo simulation method

Evaluation of monoxide film-based dosimeters for surface dose detection in electron therapy

Performance Improvement of Indium Tin Oxide Electrochemical Sensor by Mixing Carbon Black

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