The Experts below are selected from a list of 196320 Experts worldwide ranked by ideXlab platform
Toru Aoki - One of the best experts on this subject based on the ideXlab platform.
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graphene semi insulating single crystal cdte schottky type heterojunction x and γ Ray Radiation detectors
Scientific Reports, 2019Co-Authors: V V Brus, O L Maslyanchuk, M M Solovan, P D Maryanchuk, I M Fodchuk, V A Gnatyuk, N D Vakhnyak, S V Melnychuk, Toru AokiAbstract:We developed a new concept of X- and γ-Ray Radiation semiconductor detectors based on a large area graphene/semi-insulating single crystal CdTe Schottky-type heterojunction. These two terminal electronic devices can be easily fabricated by forming a Van der Waals contact between large area chemical vapor deposited graphene and CdTe substrates in air and at room temperature. This approach significantly reduces the fabrication cost and improves the reproducibility and stability of electrical properties. A detailed analysis of their AC and DC electrical properties was carried out in order to determine the width of the space charge region and dominant charge transport mechanisms at reverse bias. The unoptimized graphene/CdTe heterojunction detectors exhibited a promising spectral resolution of 241Am (59 keV) and 137Cs (662 keV) isotope Radiation at room temperature.
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Graphene/semi-insulating single crystal CdTe Schottky-type heterojunction X- and γ-Ray Radiation Detectors
Scientific Reports, 2019Co-Authors: V V Brus, O L Maslyanchuk, M M Solovan, P D Maryanchuk, I M Fodchuk, V A Gnatyuk, N D Vakhnyak, S V Melnychuk, Toru AokiAbstract:We developed a new concept of X- and γ-Ray Radiation semiconductor detectors based on a large area graphene/semi-insulating single crystal CdTe Schottky-type heterojunction. These two terminal electronic devices can be easily fabricated by forming a Van der Waals contact between large area chemical vapor deposited graphene and CdTe substrates in air and at room temperature. This approach significantly reduces the fabrication cost and improves the reproducibility and stability of electrical properties. A detailed analysis of their AC and DC electrical properties was carried out in order to determine the width of the space charge region and dominant charge transport mechanisms at reverse bias. The unoptimized graphene/CdTe heterojunction detectors exhibited a promising spectral resolution of ^241Am (59 keV) and ^137Cs (662 keV) isotope Radiation at room temperature.
Seyyed Alireza Hashemi - One of the best experts on this subject based on the ideXlab platform.
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superior x Ray Radiation shielding effectiveness of biocompatible polyaniline reinforced with hybrid graphene oxide iron tungsten nitride flakes
Polymers, 2020Co-Authors: Seyyed Alireza Hashemi, Seyyed Mojtaba Mousavi, Reza Faghihi, Mohammad Arjmand, Mansour Rahsepar, Sonia Bahrani, Seeram Ramakrishna, Chin Wei LaiAbstract:X-Ray Radiation is a harmful carcinogenic electromagnetic source that can adversely affect the health of living species and deteriorate the DNA of cells, thus it's vital to protect vulnerable sources from them. To address this flaw, the conductive polymeric structure of polyaniline (PANi) was reinforced with diverse filler loadings (i.e., 25 wt % and 50 wt %) of hybrid graphene oxide-iron tungsten nitride (ITN) flakes toward attenuation of X-Ray beams and inhabitation of microorganisms' growth. Primary characterizations confirmed the successful decoration of graphene oxide (GO) with interconnected and highly dense structure of iron tungsten nitride with a density of about 24.21 g.cm⁻3 and reinforcement of PANi with GO-ITN. Additionally, the outcome of evaluations showed the superior performance of developed shields, where a shield with 1.2 mm thickness containing 50 wt % GO-ITN showed 131.73 % increase in the electrical conductivity (compared with neat PANi) along with 78.07%, 57.12%, and 44.99% decrease in the amplitude of the total irradiated X-Ray waves at 30, 40, and 60 kVp tube voltages, respectively, compared with control X-Ray dosage. More importantly, the developed shields not only showed non-toxic nature and improved the viability of cells, but also completely removed the selected microorganisms at a concentration of 1000 µg.mL-1.
Chin Wei Lai - One of the best experts on this subject based on the ideXlab platform.
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superior x Ray Radiation shielding effectiveness of biocompatible polyaniline reinforced with hybrid graphene oxide iron tungsten nitride flakes
Polymers, 2020Co-Authors: Seyyed Alireza Hashemi, Seyyed Mojtaba Mousavi, Reza Faghihi, Mohammad Arjmand, Mansour Rahsepar, Sonia Bahrani, Seeram Ramakrishna, Chin Wei LaiAbstract:X-Ray Radiation is a harmful carcinogenic electromagnetic source that can adversely affect the health of living species and deteriorate the DNA of cells, thus it's vital to protect vulnerable sources from them. To address this flaw, the conductive polymeric structure of polyaniline (PANi) was reinforced with diverse filler loadings (i.e., 25 wt % and 50 wt %) of hybrid graphene oxide-iron tungsten nitride (ITN) flakes toward attenuation of X-Ray beams and inhabitation of microorganisms' growth. Primary characterizations confirmed the successful decoration of graphene oxide (GO) with interconnected and highly dense structure of iron tungsten nitride with a density of about 24.21 g.cm⁻3 and reinforcement of PANi with GO-ITN. Additionally, the outcome of evaluations showed the superior performance of developed shields, where a shield with 1.2 mm thickness containing 50 wt % GO-ITN showed 131.73 % increase in the electrical conductivity (compared with neat PANi) along with 78.07%, 57.12%, and 44.99% decrease in the amplitude of the total irradiated X-Ray waves at 30, 40, and 60 kVp tube voltages, respectively, compared with control X-Ray dosage. More importantly, the developed shields not only showed non-toxic nature and improved the viability of cells, but also completely removed the selected microorganisms at a concentration of 1000 µg.mL-1.
V V Brus - One of the best experts on this subject based on the ideXlab platform.
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graphene semi insulating single crystal cdte schottky type heterojunction x and γ Ray Radiation detectors
Scientific Reports, 2019Co-Authors: V V Brus, O L Maslyanchuk, M M Solovan, P D Maryanchuk, I M Fodchuk, V A Gnatyuk, N D Vakhnyak, S V Melnychuk, Toru AokiAbstract:We developed a new concept of X- and γ-Ray Radiation semiconductor detectors based on a large area graphene/semi-insulating single crystal CdTe Schottky-type heterojunction. These two terminal electronic devices can be easily fabricated by forming a Van der Waals contact between large area chemical vapor deposited graphene and CdTe substrates in air and at room temperature. This approach significantly reduces the fabrication cost and improves the reproducibility and stability of electrical properties. A detailed analysis of their AC and DC electrical properties was carried out in order to determine the width of the space charge region and dominant charge transport mechanisms at reverse bias. The unoptimized graphene/CdTe heterojunction detectors exhibited a promising spectral resolution of 241Am (59 keV) and 137Cs (662 keV) isotope Radiation at room temperature.
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Graphene/semi-insulating single crystal CdTe Schottky-type heterojunction X- and γ-Ray Radiation Detectors
Scientific Reports, 2019Co-Authors: V V Brus, O L Maslyanchuk, M M Solovan, P D Maryanchuk, I M Fodchuk, V A Gnatyuk, N D Vakhnyak, S V Melnychuk, Toru AokiAbstract:We developed a new concept of X- and γ-Ray Radiation semiconductor detectors based on a large area graphene/semi-insulating single crystal CdTe Schottky-type heterojunction. These two terminal electronic devices can be easily fabricated by forming a Van der Waals contact between large area chemical vapor deposited graphene and CdTe substrates in air and at room temperature. This approach significantly reduces the fabrication cost and improves the reproducibility and stability of electrical properties. A detailed analysis of their AC and DC electrical properties was carried out in order to determine the width of the space charge region and dominant charge transport mechanisms at reverse bias. The unoptimized graphene/CdTe heterojunction detectors exhibited a promising spectral resolution of ^241Am (59 keV) and ^137Cs (662 keV) isotope Radiation at room temperature.
Seyyed Mojtaba Mousavi - One of the best experts on this subject based on the ideXlab platform.
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superior x Ray Radiation shielding effectiveness of biocompatible polyaniline reinforced with hybrid graphene oxide iron tungsten nitride flakes
Polymers, 2020Co-Authors: Seyyed Alireza Hashemi, Seyyed Mojtaba Mousavi, Reza Faghihi, Mohammad Arjmand, Mansour Rahsepar, Sonia Bahrani, Seeram Ramakrishna, Chin Wei LaiAbstract:X-Ray Radiation is a harmful carcinogenic electromagnetic source that can adversely affect the health of living species and deteriorate the DNA of cells, thus it's vital to protect vulnerable sources from them. To address this flaw, the conductive polymeric structure of polyaniline (PANi) was reinforced with diverse filler loadings (i.e., 25 wt % and 50 wt %) of hybrid graphene oxide-iron tungsten nitride (ITN) flakes toward attenuation of X-Ray beams and inhabitation of microorganisms' growth. Primary characterizations confirmed the successful decoration of graphene oxide (GO) with interconnected and highly dense structure of iron tungsten nitride with a density of about 24.21 g.cm⁻3 and reinforcement of PANi with GO-ITN. Additionally, the outcome of evaluations showed the superior performance of developed shields, where a shield with 1.2 mm thickness containing 50 wt % GO-ITN showed 131.73 % increase in the electrical conductivity (compared with neat PANi) along with 78.07%, 57.12%, and 44.99% decrease in the amplitude of the total irradiated X-Ray waves at 30, 40, and 60 kVp tube voltages, respectively, compared with control X-Ray dosage. More importantly, the developed shields not only showed non-toxic nature and improved the viability of cells, but also completely removed the selected microorganisms at a concentration of 1000 µg.mL-1.
