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Graphene-based antidots for thermoelectric applications
, Article Journal of the Electrochemical Society ; Volume 158, Issue 12 , 2011 , Pages K213-K216 ; 00134651 (ISSN) ; Pourfath, M ; Pazoki, M ; Faez, R ; Kosina, H ; Sharif University of Technology
2011
Abstract
The low temperature thermoelectric properties of hydrogen-passivated graphene-based antidot lattices are theoretically investigated. Calculations are performed using density functional theory in conjunction with the Landauer formula to obtain the ballistic transport coefficients. Antidot lattices with hexagonal, triangular and rectangular antidot shapes are studied. Methods to reduce the thermal conductance and to increase the thermoelectric power factor of such structures are studied. Our results indicate that triangular antidot lattices have the smallest thermal conductance due to longer boundaries, the smallest distance between the neighboring antidots, and the armchair edges. This...
Geometrical effects on the thermoelectric properties of ballistic graphene antidot lattices
, Article Journal of Applied Physics ; Volume 110, Issue 5 , 2011 ; 00218979 (ISSN) ; Pourfath, M ; Faez, R ; Kosina, H ; Sharif University of Technology
2011
Abstract
The thermoelectric properties of graphene-based antidot lattices are theoretically investigated. A third nearest-neighbor tight-binding model and a fourth nearest-neighbor force constant model are employed to study the electronic and phononic band structures of graphene antidot lattices with circular, rectangular, hexagonal, and triangular antidot shapes. Ballistic transport models are used to evaluate transport coefficients. Methods to reduce the thermal conductance and to increase the thermoelectric power factor of such structures are studied. Our results indicate that triangular antidot lattices have the smallest thermal conductance due to longer boundaries and the smallest distance...
Hydrogen-passivated graphene antidot structures for thermoelectric applications
, Article 2011 12th Int. Conf. on Thermal, Mechanical and Multi-Physics Simulation and Experiments in Microelectronics and Microsystems,EuroSimE 2011 ; 18 April 2011 through 20 April , 2011 ; 9781457701078 (ISBN) ; Pourfath, M ; Faez, R ; Kosina, H ; Sharif University of Technology
Abstract
In this work, we present a theoretical investigation of the thermal conductivity of hydrogen-passivated graphene antidot lattices. Using a fourth nearest-neighbor force constant method, we evaluate the phonon dispersion of hydrogen-passivated graphene antidot lattices with circular, hexagonal, rectangular and triangular shapes. Ballistic transport models are used to evaluate the thermal conductivity. The calculations indicate that the thermal conductivity of hydrogen-passivated graphene antidot lattices can be one fourth of that of a pristine graphene sheet. This reduction is stronger for right-triangular and iso-triangular antidots among others, all with the same area, due to longer...
An investigation of the geometrical effects on the thermal conductivity of graphene antidot lattices
, Article ECS Transactions, 2 May 2011 through 4 May 2011, Montreal, QC ; Volume 35, Issue 3 , May , 2011 , Pages 185-192 ; 19385862 (ISSN) ; 9781566778640 (ISBN) ; Pourfath, M ; Faez, R ; Kosina, H ; Sharif University of Technology
2011
Abstract
In this work we investigate the thermal conductivity of graphene-based antidot lattices. A third nearest-neighbor tight-binding model and a forth nearest-neighbor force constant model are employed to study the electronic and phononic band structures of graphene-based antidot lattices. Ballistic transport models are used to evaluate the electronic and the thermal conductivities. Methods to reduce the thermal conductivity and to increase the thermoelectric figure of merit of such structures are studied. Our results indicate that triangular antidot lattices have the smallest thermal conductivity due to longer boundaries and the smallest distance between the neighboring dots
Preparation of metal–organic frameworks UiO-66 for adsorptive removal of methotrexate from aqueous solution
, Article Journal of Inorganic and Organometallic Polymers and Materials ; 2017 , Pages 1-10 ; 15741443 (ISSN) ; Zamani, M ; Molavi, H ; Khieri Manjili, H ; Danafar, H ; Shojaei, A ; Sharif University of Technology
Abstract
A low cytotoxic metal–organic framework (MOF) UiO-66 (UiO stands for University of Oslo) and NH2-UiO-66, that showed high cell viability of HFF-2 via 3-(4, 5-dimethylthiazol-2-yl) 2, 5-diphenyl tetrazolium assay, was reported as an effective adsorbent (antidotal) agents. The structure of MOFs was confirmed by Fourier transform infrared, Field emission scanning electron microscopy (FESEM) and X-ray diffraction. Thermal behavior of MOFs was investigated using with thermogravimetric analyzer in nitrogen atmosphere to check the thermal stability. FESEM showed NH2-UiO-66 displayed symmetrical crystals with triangular base pyramid morphology, with the particle size around 100 nm and uniform size...
Preparation of metal–organic frameworks uio-66 for adsorptive removal of methotrexate from aqueous solution
, Article Journal of Inorganic and Organometallic Polymers and Materials ; Volume 28, Issue 1 , 2018 , Pages 177-186 ; 15741443 (ISSN) ; Zamani, M ; Molavi, H ; Khieri Manjili, H ; Danafar, H ; Shojaei, A ; Sharif University of Technology
Springer New York LLC
2018
Abstract
A low cytotoxic metal–organic framework (MOF) UiO-66 (UiO stands for University of Oslo) and NH2-UiO-66, that showed high cell viability of HFF-2 via 3-(4, 5-dimethylthiazol-2-yl) 2, 5-diphenyl tetrazolium assay, was reported as an effective adsorbent (antidotal) agents. The structure of MOFs was confirmed by Fourier transform infrared, Field emission scanning electron microscopy (FESEM) and X-ray diffraction. Thermal behavior of MOFs was investigated using with thermogravimetric analyzer in nitrogen atmosphere to check the thermal stability. FESEM showed NH2-UiO-66 displayed symmetrical crystals with triangular base pyramid morphology, with the particle size around 100 nm and uniform size...
Reducing the risk of death induced by aluminum phosphide poisoning: The new therapies
, Article Chemosphere ; Volume 294 , 2022 ; 00456535 (ISSN) ; Abouei Mehrizi, A ; Eghbal, M. A ; Ghazi Khansari, M ; Azarmi, Y ; Sattari, M. R ; Karaman, C ; Karimi, F ; Alizadeh, M ; Yazdani, M. N ; Hosseinpour, P ; Sharif University of Technology
Elsevier Ltd
2022
Abstract
Numerous people suffer from accidental or deliberate exposure to different pesticides when poisoning with aluminum phosphate (AlP) is increasing in the eastern countries. Aluminum phosphate is a conventional insecticide that quickly reacts with water or the moistures in the atmosphere and produces fatal phosphine gas, which absorbs quickly by the body. Oral consumption or inhalation of AlP leads to excessive reaction of the body such as fatigue, vomiting, fever, palpitation, vasodilatory shock, increasing blood pressure, cardiac dysfunction, pulmonary congestion, shortness of breath, and death. The garlic smell from the patient's mouth or exhale is one of the methods to recognize the...
Evaluation of UiO-66 metal organic framework as an effective sorbent for curcumin's overdose
, Article Applied Organometallic Chemistry ; Volume 32, Issue 4 , 2018 ; 02682605 (ISSN) ; Zamani, M ; Aghajanzadeh, M ; Kheiri Manjili, H ; Danafar, H ; Shojaei, A ; Sharif University of Technology
John Wiley and Sons Ltd
2018
Abstract
Metal organic frameworks (MOFs) UiO-66 (UiO stands for University of Oslo) and NH2-UiO-66 were prepared and characterized as sorbent (antidotal agents) for curcumin (CUR) adsorption. The structure of products were characterized by X-ray powder diffraction (XRD), Field emission scanning electron microscopy (FESEM), thermogravimetric analysis (TGA), Attenuated Total Reflectance-Fourier transform infrared spectroscopy (ATR-FTIR), and N2 adsorption–desorption measurements. FESEM showed NH2-UiO-66 displayed symmetrical crystals with triangular base pyramid morphology, with the particle size around 100 nm and uniform size distribution. Adsorption capacities of CUR/MOFs with different mass ratios...