Browsing by Subject "Metal-organic framework"

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    Engineering of the high-power laser-induced synthesis of ni-based metal-organic framework: investigation of its optical properties, computational methodology, electrocatalytic performances, and glucose-sensing ability
    (Wiley-VCH Verlag GmbH & Co. KGaA, 2024-10-16) Mutlu, Saliha; Ortaç, Bülend; Karatutlu, Ali; Görkan, Taylan; Durgun, Engin; Söyler, D.; Söylemez, S.; Arsu, N.; Savaşkan Yılmaz, Sevil
    Metal-organic frameworks (MOFs) are porous materials with numerouschemical and structural possibilities. Due to their ease of modification,well-organized structure, and diverse guest molecule chemistry, MOFs areideal platforms for uncovering improved functional material designcharacteristics. Quantitative analysis of glucose is crucial, especially in somefood products, for quality control as well as evaluation of the glucose levelshelps diagnose and treat diabetes. Recent glucose sensing devices have reliedheavily on MOFs and other nanomaterials to enable user-friendly and safenon-invasive sensing methods. Nevertheless, the conventional synthesismethods involve multi-day reactions, cooling, and depressurizationprocesses. This study demonstrates the unprecedented high-powerlaser-induced rapid synthesis (LIRS) of Ni-based MOF nanospheres withinterconnected nano-rods and noncentrosymmetric primitive tricliniccrystalline structure, highlighting their multifunctional usage in sensing andgas sorption applications. Ab initio simulations show excellent agreementwith the experimental physical and gas sorption properties. Furthermore, theNi-MOF-based biosensor accurately measures glucose real-life beveragesamples, yielding promising glucose detection biosensor results with a lowlimit of the detection (LOD) of 13.96 μM and high sensitivity of 120.606 μAmM−1 cm−2.
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    Laser-driven rapid synthesis of metal-organic frameworks and investigation of UV-NIR optical absorption, luminescence, photocatalytic degradation, and gas and Ion adsorption properties
    (MDPI AG, 2024-01-12) Mutlu, Saliha; Ortac, Bulend; Ozbey, Dogukan Hazar; Durgun, Engin; Savaskan Yilmaz, Sevil; Arsu, Nergis
    In this study, we designed a platform based on a laser-driven approach for fast, efficient, and controllable MOF synthesis. The laser irradiation method was performed for the first time to synthesize Zn-based MOFs in record production time (approximately one hour) compared to all known MOF production methods with comparable morphology. In addition to well-known structural properties, we revealed that the obtained ZnMOFs have a novel optical response, including photoluminescence behavior in the visible range with nanosecond relaxation time, which is also supported by first-principles calculations. Additionally, photocatalytic degradation of methylene blue with ZnMOF was achieved, degrading the 10 ppm methylene blue (MB) solution 83% during 1 min of irradiation time. The application of laser technology can inspire the development of a novel and competent platform for a fast MOF fabrication process and extend the possible applications of MOFs to miniaturized optoelectronic and photonic devices.
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    Zn-MOF as a saturable absorber for thulium/holmium-doped fiber laser
    (Institute of Physics Publishing Ltd., 2024-09-19) Ahmad, H.; Chiam, J. W.; Samion, M. Z.; Thambiratnam, K.; Mutlu, S.; Yilmaz, S. S.; Arsu, N.; Ortaç, Bülend
    Metal–organic framework (MOF) is a class of material that is highly porous and modular. Due to their unique properties, MOFs have found applications in gas storage, gas separation, sensing, and supercapacitors. [Zn2(H2L)2(1,2-Bis(4-pyridyl)ethene)4]n, zinc (Zn)-based MOF was used in this work to achieve mode-locked operation in a thulium/holmium-doped fiber laser due to its excellent optical absorption at a wavelength of 1925 nm. The saturable absorber (SA) was fabricated by drop-casting a mixture of Zn-MOF and isopropanol on an arc-shaped fiber. The center wavelength of the mode-locked laser is 1906.75 nm, with a maximum average output power of 3.251 mW. The fundamental repetition rate and the pulse width were 12.89 MHz and 1.772 ps. At the same time, the pulse energy and peak power were 252 pJ and 142 W, respectively. To the authors' knowledge, this is the first time an MOF has been used for mode-locked pulse generation in a thulium/holmium-doped all-fiber laser. This work extends the use of MOF material as a saturable absorber for mode-locking applications in near-infrared fiber lasers.