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  • دکتری (1366)

    سینتیک سامانه های فوتوکلوئیدی

    امپریال کالج علوم و تکنولوژی، لندن، انگلستان

  • کارشناسی‌ارشد (1356)

    فیزیک حالت جامد

    دانشگاه تبریز، تبریز، ایران

  • کارشناسی (1354)

    فیزیک

    دانشگاه تبریز، تبریز، ایران

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اسماعیل ساعی ور ایرانی زاد ، استاد فیزیک ماده چگال دانشگاه تربیت مدرس واقع در تهران، جمهوری اسلامی ایران است. ایشان مدارج علمی هر دو مقطع لیسانس و فوق لیسانس را از دانشگاه تبریز به ترتیب در سال های ۱۳۵۴ و ۱۳۵۶ و مقطع دکتری و عضویت در امپریال کالج را در سال ۱۳۶۶ از امپریال کالج علوم و تکنولوژی دانشگاه لندن انگلستان در خوزه سینیتیک سامانه های فوتو کلوئیدی دریافت کرده اند. نامبرده موفق به دریافت سه بورسیه تحصیلی از آلمان، دولت جمهوری اسلامی ایران و انستیو تحقیقاتی یونیلور انگلستان شده است. او برنده جایزه بنیاد البرز سال ۱۳۶۶ از سوی وزارتین فرهنگ و علوم به خاطر رتبه اول برگزیده از بین رتبه اول های ایران شده است. او پایه گزار سه حوزه تحقیقاتی علوم و فناوری نانو، سامانه های پیل سوختی و تولید هیدروژن آفتابی در ایران است. زمینه های تحقیقاتی مورد علاقه ایشان شامل مواد نانو ساختار، مواد دوبعدی، مواد نرم مانند بلورهای مایع، سلول های خورشیدی حساس رنگدانه ای، قطعات نورگسیل، پیل های سوختی مبادله کننده پروتون، پیل های سوختی اکسید جامد و تولید هیدروژن آفتابی است.

ارتباط

رزومه

Photoluminescence enhancement of single-layer graphene quantum dots by the surface plasmon resonance of Au nanocubes

Mohamad Taghi Dejpasand, Esmaiel Saievar-Iranizad, Amir Bayat
Journal PapersJournal of Luminescence , 2021 March 26, {Pages 118070 }

Abstract

Highly photoluminescent single-layer graphene quantum dots around Au nanocubes (SLGQDs/Au) were synthesized using a simple method. The SLGQDs were synthesized using a low-cost hydrothermal method from glucose as a precursor. The atomic force microscopy analysis proved that the average thickness of the GQDs is lower than 4 ?, meaning that the GQDs are single-layer dots. The novel cubic shape of the SLGQDs/Au nanocomposites was confirmed by field-emission scanning electron microscopy and Transmission electron microscopy. Structural characterization was performed by X-ray diffraction, energy-dispersive X-ray spectroscopy and Raman spectroscopy. Photoluminescence (PL) spectroscopy revealed that the obtained SLGQDs/Au nanocomposite has a higher

Boron-and nitrogen-doped graphene quantum dots with enhanced supercapacitance

MT Dejpasand, S Sharifi, E Saievar-Iranizad, A Yazdani, K Rahimi
Journal Papers , , {Pages }

Abstract

Sustainable superhydrophobic branched hierarchical ZnO nanowires: Stability and wettability phase diagram

M Ebrahimi, A Bayat, SR Ardekani, ES Iranizad, AZ Moshfegh
Journal Papers , , {Pages }

Abstract

Effect of dye absorption time on performance of ZnO, TiO2 and‎ SnO2 nanoparticle photo-anodes in dye sensitized solar cell

A Arabkhorasani, E Saievar-Iranizad, A Bayat
Journal Papers , , {Pages }

Abstract

Extended Gibbs Free Energy and Laplace Pressure of Ordered Hexagonal Close-Packed Spherical Particles: A Wettability Study

A Bayat, M Ebrahimi, SR Ardekani, ES Iranizad, AZ Moshfegh
Journal Papers , , {Pages }

Abstract

Surface Plasmon-Induced Photodegradation of Methylene Blue with Single Layer Graphene Quantum Dots/Au Nanospheres under Visible-Light Irradiation

MT Dejpasand, E Saievar-Iranizad, A Bayat, SR Ardekani
Journal Papers , , {Pages }

Abstract

Highly porous film of TiO2 nanoparticles synthesized using carbon nanospheres for highly efficient dye-sensitized solar cells

Amir Bayat, Esmaiel Saievar-Iranizad, Elham Bayatloo, Ali Zare, Ali Arabkhorasani, Sajad Saghaye Polkoo
Journal PapersThe European Physical Journal Plus , Volume 135 , Issue 2, 2020 February 1, {Pages 195 }

Abstract

Highly porous films of TiO 2 nanoparticles were prepared by a doctor blade method using carbon nanospheres as a porosity enhancer. At first, carbon nanospheres with a diameter ranging from 100 to 600 nm were synthesized by a hydrothermal method; then, a paste of TiO 2 nanoparticles was mixed with various amounts of carbon nanospheres. To obtain a porous TiO 2 nanoparticles photoanode and removing carbon nanospheres, photoanode was sintered at a temperature of 500 C. XRD patterns and Raman analysis revealed the anatase phase of TiO 2 and show that the carbon spheres acted only as a porosity enhancer. Removing carbon nanospheres leads to the creation of cavities with various sizes in dye-sensitized solar cells (DSSCs). Under illumination, the

Straightforward fabrication of robust Fe-doped Ni 3 Se 2 supported nickel foam as a highly efficient electrocatalyst for the oxygen evolution reaction

Mostafa Ghaemmaghami, Yadollah Yamini, Esmaiel Saievar-Iranizad, Amir Bayat
Journal PapersSustainable Energy & Fuels , 2020 January , {Pages }

Abstract

Sluggish kinetics is the major obstruction in the reaction of water splitting. Design and development of noble metal-free, active and bifunctional electrocatalysts are crucial for the oxygen evolution reaction (OER). Transition-metal selenides have been applied as OER catalyst alternatives to noble metal-based catalysts. Herein, we report that a Fe-doped Ni3Se2 film electrodeposited on a conductive three dimensional macro-porous Ni foam (NF) substrate behaves as a robust electrocatalyst for the OER in a strongly basic medium (1 M, KOH), showing good activity compared to its un-doped counterpart. This catalyst showed excellent performance, exhibiting a current density of 10 mA cm−2 at an overpotential of 225 mV and a low Tafel slope (35.3

Tuning HOMO and LUMO of three region (UV, Vis and IR) photoluminescent nitrogen doped graphene quantum dots for photodegradation of methylene blue

Mohamad Taghi Dejpasand, Esmaiel Saievar-Iranizad, Amir Bayat, Aref Montaghemi, Saeed Rahemi Ardekani
Journal PapersMaterials Research Bulletin , 2020 April 14, {Pages 110886 }

Abstract

Low cost, gram scale and highly N doped graphene quantum dots (NGQDs) with a broad absorption spectrum was synthesized using hydrothermal method by citric acid and urea. The obtained NGQDs possess wide absorption spectrum from ultraviolet to visible and IR range of wavelength. Optical characterization revealed that NGQDs are highly photoluminescent in three region of light (i.e. UV, Vis and IR). The average thickness is lower than 1 nm, meaning that the NGQDs are single, two or three layers of graphene. Lowest unoccupied molecular orbital (LUMO) and highest occupied molecular orbital (HOMO) of the NGQDs determined using a cyclic voltammetry (CV) method, and energy band gap was obtained ∼ 1.91 eV. A mechanism of charge carrier generati

One step preparation of Fe doped CoSe2 supported on nickel foam by facile electrodeposition method as a highly efficient oxygen evolution reaction electrocatalyst

Ali Zare, Amir Bayat, Esmaiel Saievar-Iranizad, Homam Naffakh-Moosavy
Journal PapersJournal of Electroanalytical Chemistry , Volume 878 , 2020 December 1, {Pages 114595 }

Abstract

The production of hydrogen by water electrolysis fundamentally requires growth of strong and effective oxygen evolutional electrocatalysts. Transition metal selenides, comprising of earth abundant elements have attracted regards as superb electrocatalysts for oxygen evolution reaction (OER) in the alkaline electrolyte. Toward defeat the huge overpotential for OER, in this manuscript we investigate the expansion of Fe doped cobalt-diselenide (Fe-CoSe2) nanostructure over 3D nickel foam (NF) through a simple and scalable electrodeposition technique. The prepared Fe-CoSe2/NF electrode demands an overpotential of only 220 and 256?mV to attain the current density of 10 and 100?mA?cm−2, respectively. Moreover, the Fe-CoSe2/NF exhibits negligibl

Synthesis of binder-free fluffy anemone-like MoS2 for electrocatalytic hydrogen evolution: A Mott-schottky study

Fereshteh Mostafavi Meresht, Esmaiel Saievar Iranizad, Amir Bayat, Mehrdad Najafi Liavali
Journal PapersInternational Journal of Hydrogen Energy , 2020 August 11, {Pages }

Abstract

Highly active anemone-like MoS2 catalyst was vertically and directly deposited on fluorine-doped tin oxide (FTO) substrate via a straightforward facile hydrothermal method with excellent adhesion and appreciable stability for hydrogen evolution reaction (HER). MoS2 catalyst with unique morphology full of active edge sites and surface areas was fabricated by varying synthesis time and specific concentration of precursors. Structural characteristics were investigated by X-ray diffraction pattern (XRD), and Raman spectroscopy. Field emission scanning electron microscopy (FESEM) images show the variation of morphology during synthesis time as a very important factor in the preparation process. It also reveals the lamellar structure of anemone-l

Investigating the Effect of Hierarchical Carbon Micro/Nano Spheres on the Surface Wettability: Experimental and Theoretical Study

Khadijeh Hemmati, Abolfath Hossein Zadeh, Esmaiel Saievar Iranizad
Journal PapersJournal of Optoelectronical Nanostructures , Volume 5 , Issue 4, 2020 November 1, {Pages 33-48 }

Abstract

Carbon spheres with controllable structures (i.e., nano and microstructure)were prepared by using a hydrothermal method. By adjusting the concentration ofglucose solution at a both constant temperature and constant process time in a sealedautoclave, the total size of carbon spheres (CSs) was changed from nano to microscale.Then micronanobinary carbon spheres structure (MNCS) was successfully obtained bycoating colloidal solution of carbon nanospheres (CNSs, average diameter of 186 nm)and microspheres (CMSs, average diameter of 5 μm) on the FTO substrates. It wasrealized that by annealing of the carbon spheres under vacuum condition, theirfunctional groups were reduced, therefore, this effected on the wetting behavior ofcarbon spheres. The

Highly porous film of TiO 2 nanoparticles synthesized using carbon nanospheres for highly efficient dye-sensitized solar cells

A Bayat, E Saievar-Iranizad, E Bayatloo, A Zare, A Arabkhorasani, ...
Journal Papers , , {Pages }

Abstract

A new approach for preparation of semi-transparent superhydrophobic coatings by ultrasonic spray hydrolysis of methyltrimethoxysilane

Saeed Rahemi Ardekani, Alireza Sabour Rouh Aghdam, Mojtaba Nazari, Amir Bayat, Esmaiel Saievar-Iranizad
Journal PapersProgress in Organic Coatings , Volume 135 , 2019 October 1, {Pages 248-254 }

Abstract

A novel nebulizing spray hydrolysis approach was used for preparation of semi-transparent superhydrophobic coatings. Methyltrimethoxysilane was dissolved in water:ethanol mixture and ultrasonically sprayed on different substrates. Superhydrophobic coatings with a contact angle (CA) as high as 164? and a sliding angle below 5? were obtained. FESEM and AFM revealed a hierarchical micro-nano binary structure with nanometric roughness of the coatings. The coated glass substrate exhibited transmittance close to 80%. The prepared coating showed great self-cleaning and water jet repellency behaviors. The superhydrophobicity of the samples was remained after subjecting to ambient conditions for 50 days. The coating was also durable under water flus

Exfoliated transition metal dichalcogenide (MX2; M= Mo, W; X= S, Se, Te) nanosheets and their composites with polyaniline nanofibers for electrochemical capacitors

Ali Sajedi-Moghaddam, Carmen C Mayorga-Martinez, Esmaiel Saievar-Iranizad, Zdenek Sofer, Martin Pumera
Journal PapersApplied Materials Today , Volume 16 , 2019 September 1, {Pages 280-289 }

Abstract

Ultrathin sheets of transition metal dichalcogenides have received a great deal of interest in an attempt to develop advanced electrode nanomaterials for electrochemical capacitors, with most of the attention focused on pure transition metal dichalcogenides. We systematically investigated and compared the charge storage capability of tert-butyllithium-exfoliated group 6 transition metal dichalcogenide materials (MX2; M?=?Mo, W; X?=?S, Se, Te). The group 6 MX2 2D materials exhibited distinctive charge storage performance as a result of their different chemical compositions and morphological features. MoTe2 nanosheets demonstrated the highest gravimetric capacitance of all materials. Furthermore, we hybridized these 2D materials with nanofibr

Ni- and Cu-doping effects on formation and migration energies of oxygen vacancies in Ba0.5Sr0.5Fe1−x (Cu/Ni) xO3−δ perovskites: a DFT + U study

Tayebeh Roohandeh, Esmaiel Saievar-Iranizad
Journal PapersApplied Physics A , Volume 125 , Issue 8, 2019 August 1, {Pages 552 }

Abstract

The bulk oxygen vacancy formation, migration energy and surface migration energy of BSFCu and BSFNi are calculated in this article. Two important factors affecting the formation and migration energies: the vacancy concentration and Cu/Ni doping are studied. With Cu/Ni doping, the oxygen vacancy formation energy decreases [Evac (BSF??BSCF??BSFNi??BSFCu)]. The activation energies of BSFNi and BSFCu are lower than those of BSF and BSCF cathodes. Therefore, Cu/Ni-doped BSF shows the enhancement of electrochemical activity. We also calculated the surface migration energies of (011) Ba0.5Sr0.5Fe0.75Cu.0.25O3−δ for δ = 0.125, 0.25 and (001) Ba0.5Sr0.5Fe0.75(Cu/Ni)0.25O3−δ for δ = 0.125, which for (011) BSFCu are high

A Comprehensive Review on Ultrasonic Spray Pyrolysis Technique: Mechanism, Main Parameters and Applications in Condensed Matter

Saeed Rahemi Ardekani, Alireza Sabour Rouh Aghdam, Mojtaba Nazari, Amir Bayat, Elnaz Yazdani, Esmaiel Saievar-Iranizad
Journal Papers , 2019 June 6, {Pages 104631 }

Abstract

Nanostructured materials have attracted much attention in recent decades. Nowadays, there are numerous nanomaterials with several applications. The ultrasonic spray pyrolysis method is a cost-effective and adaptable technique based on an aerosol process for synthesizing nanoparticles and depositing thin films. The technique is capable of synthesizing metal, oxide, and composite nanomaterials with precisely controllable morphologies and chemical compositions using metal salts in aqueous solvents. More importantly, it is popular, as evident from the growing number of studies being conducted on the technique. Here, we review studies conducted on basic principles and applications of the ultrasonic spray pyrolysis method and investigate effects

A study on the formation and migration of oxygen vacancies in Ba0. 5Sr0. 5Co0. 75Fe0. 25O3-δ perovskite surfaces by first-principles modelling

Tayebeh Roohandeh, Esmaiel Saievar-Iranizad
Journal PapersMaterials Chemistry and Physics , Volume 226 , 2019 March 15, {Pages 371-377 }

Abstract

Mixed conducting perovskites such as Ba0.5Sr0.5Co0.75Fe0.25O3-δ (BSCF) are attracting interest for solid oxide fuel cells (SOFCs). Electrochemical behaviors of BSCF surfaces, compared to a bulk one, have not been investigated yet. In this paper, electrochemical properties of BSCF were investigated by density functional theory (DFT). We calculated barriers of the (011) BSCF terminated by SrCoO, and compared them with the bulk values. We found that the oxygen vacancy migration energies within 6.87–9.59 ? in depth in the slab are nearly similar to the bulk values. The surface oxygen vacancy migration energies in (011) and (001) slabs of BSCF were compared. They have two values in the (011) BSCF and vacancies migrate under two models, whic

Synthesis and characterization of photocatalytically active crumpled-shape nanocomposites of nitrogen and sulfur co-doped ZnO–CeO2

Saeed Rahemi Ardekani, Alireza Sabour Rouh Aghdam, Mojtaba Nazari, Amir Bayat, Esmaiel Saievar-Iranizad, Mehrdad Najafi Liavali
Journal PapersSolar Energy Materials and Solar Cells , Volume 203 , 2019 December 1, {Pages 110195 }

Abstract

In this study, crumpled-shape nanocomposite of nitrogen and sulfur co-doped ZnO–CeO2 (NSZC) was deposited on FTO substrate using one-step ultrasonic spray pyrolysis. Zinc acetate, cerium nitrate, and thiourea were dissolved in deionized water and used as starting solution. The samples were characterized using FESEM, XRD, UV–vis spectroscopy, EIS, and PL. The as-prepared nitrogen and sulfur co-doped ZnO–CeO2 nanocomposites were evaluated as high photocatalysts for degradation of methyl orange. Nearly 100% photocatalytic degradation of methyl orange was achieved for 180 min. The photoluminescence and electrochemical impedance spectroscopy revealed that co-doping of nitrogen and sulfur could promote the suppression of electron-hole rec

One step synthesis of graphene quantum dots, graphene nanosheets and carbon nanospheres: investigation of photoluminescence properties

Fatemeh Behzadi, Esmaiel Saievar-Iranizad, Amir Bayat
Journal PapersMaterials Research Express , Volume 6 , Issue 10, 2019 August 30, {Pages 105615 }

Abstract

Single layer graphene quantum dots (GQDs), graphene nanosheets (GNSs), and carbon nanospheres (CNSs) were synthesized by an easy, environment-friendly, and low-cost hydrothermal process and the effect of the hydrothermal reaction time on their structural and photoluminescence properties was studied. Four different kinds of samples were prepared only using glucose and deionized water. By varying the hydrothermal reaction time, we obtained excitation-dependent photoluminescent GQDs and GNSs with different photoluminescence quantum yields (PLQYs) and CNSs without any photoluminescence. Atomic force microscopy images showed that the synthesized GQDs are single or double-layered. Transmission electron microscopy (TEM) images indicated that the s

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  • 1397
    جعفرنژاد, حامد
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