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Wavelength dependent graphene oxide-based optical microfiber sensor for ammonia gas
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Ammonia detection in ambient air is critical, given its implication on the environment and human health. In this work, an optical fiber tapered to a 20 µm diameter and coated with graphene oxide was developed for absorbance response monitoring of ammonia at visible (500–700 nm) and near-infrared wavelength regions (700–900 nm). The morphology, surface characteristics, and chemical composition of the graphene oxide samples were confirmed by a field emission scanning electron microscope, an atomic force microscope, X-ray diffraction, and an energy dispersion X-ray. The sensing performance of the graphene oxide-coated optical microfiber sensor towards ammonia at room temperature revealed better absorbance response at the near-infrared wavelength region compared to the visible region. The sensitivity, response and recovery times at the near-infrared wavelength region were 61.78 AU/%, 385 s, and 288 s, respectively. The sensitivity, response and recovery times at the visible wavelength region were 26.99 AU/%, 497 s, and 192 s, respectively. The selectivity of the sensor towards ammonia was affirmed with no response towards other gases.
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Citrus aurantium L.PEELS AND SEEDS : PHYTOCHEMICAL SCREENING AND ANTIBA CTERIAL ACTIVITY
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أ.م.د. قتيبة ابراهيم خضر الزند2024
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An overview of neuro-ophthalmic disorders at Jenna Ophthalmic Center, Baghdad, Iraq (2021-2022)
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م.د ليث غضنفر شريف جمعة2024
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Emerging Innovations In vincristine-encapsulated nanoparticles :pioneering a new era in oncological therapeutics
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ا.م.د. اسراء غازي جبار اللعيبي الماذي2024
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Recent advancements in irinotecan-loaded nanomaterials as a smart drug delivery system for cancer therapy : a state-of-art-review
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ا.م.د. اسراء غازي جبار اللعيبي الماذي2024
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Comparative Study for Citrus Fruits Peel Extract , Phytochemical Screening and In-vitro Antioxidant Activity
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أ. م. د. ايهاب ابراهيم عبد الوهاب سليمان الخليفة2023