mohammad hadi Ahmadi

@liau.ac.ir

Physics, Faculty of Engineering
Lahijan Branch, Islamic Azad University

mohammad hadi Ahmadi


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https://researchid.co/ahmadi
9

Scopus Publications

267

Scholar Citations

10

Scholar h-index

10

Scholar i10-index

Scopus Publications

  • Physical and gamma radiation shielding features of pure zinc oxide and copper doped zinc oxide: a comparison between experimental and simulated gamma shielding capability
    Amir Reza Khoshhal, Abbas Bagheri Khatibani, Ensie Basiri Tochaee, Mohammad Hadi Ahmadi
    Bulletin of Materials Science, 2025
  • Structural, morphological, and optical properties of sol-gel derived ZnO and ZnO:Cu and its application as a gamma ray attenuator
    Mahdi Shaddoust, Amir Reza Khoshhal, Abbas Bagheri Khatibani, Mohammad Hadi Ahmadi
    Applied Radiation and Isotopes, 2025
    Pristine and copper doped zinc oxide nanostructures have been afforded by a simple and easy to access sol-gel method. Their common properties were examined through the standard analyzing methods. X-ray diffraction results vouched the hexagonal structure of zinc oxide; even though, the insertion of copper changed the zinc oxide structure to some extent. FESEM achievements illustrated the nanosized quasi-spherical grains and the agglomeration of them. The protection factors against gamma rays , including mean free path (MFP), mass attenuation coefficients (MAC), linear attenuation coefficients (LAC), transmission Factor (TF), tenth value layer (TVL), half value layer (HVL) and radiation protection efficiency (RPE) were calculated. According to these factors, it can be concluded that the use of ZnO, and ZnO-Cu (10 % and 20 %) as a shielding for gamma ray can be valuable. For a more complete review, a simulation survey through GEometry ANd Tracking (GEANT4) code was applied to compare the protecting parameters. • ZnO and ZnO:Cu nano-structures were prepared by the sol-gel method. • Different physical properties and sheilding parameters were examined. • By experimental and simulation method, some sheilding parameters were calculated. • All protection parameters are in good agreement in both investigated methods.
  • Prominent ethylene glycol sensing of sol–gel-derived ZnO and Cu-ZnO nanostructures
    Seyedeh Faezeh Hashemi Karouei, Mahdi Shaddoust, Abbas Bagheri Khatibani, Arefeh Rezapour, Mohammad Hadi Ahmadi
    Journal of Sol Gel Science and Technology, 2024
  • Effect of low and relatively long-term gamma irradiation on physical properties of ZnO and ZnO:Co thin films
    Hamed Beigli, Mahdi Shaddoust, Mohammad Hadi Ahmadi, Abbas Bagheri Khatibani
    Journal of Sol Gel Science and Technology, 2023
  • Growth, characterization and investigation of gas-sensing performance of graphene and copper-doped zinc oxide prepared by sol–gel method
    Sara Khadem Charvadeh, Sadaf Nejatinia, Abbas Bagheri Khatibani, Mohammad Hadi Ahmadi
    Bulletin of Materials Science, 2022
  • A comparative ab initio study of the structural, mechanical, electronic and optical behaviors of ZnO:Ni thin films with nanometer scale
    Ali Abdolahzadeh Ziabari, S.J. Mousavi, M.H. Ahmadi
    Chinese Journal of Physics, 2019
    The electronic and optical properties of undoped and Ni–doped ZnO thin films with nanometer scale have been studied in the wurtzite phase, by first–principle approach. Density functional theory has been employed to calculate the fundamental properties of the films using full–potential linearized augmented plane–wave method. Ni doping was found to reduce the bandgap value of the material. Additionally, DOS effective mass of the electrons was evaluated. It was revealed that the effective mass of the electrons at the bottom of conduction band increased with Ni doping. Decrease of reflectance for thin films with nanometer scale in the UV–vis region was observed. The substitution by Ni decreased the intensity of the peaks, and a red shift was observed in the absorption peak. Moreover, the static dielectric constant, and static refractive index decreased with Ni content. Energy loss function of the modeled compounds was also evaluated. All calculated parameters were compared with the available experimental and other theoretical results.
  • Black hole remnants in Hayward solutions and noncommutative effects
    S. Hamid Mehdipour, M.H. Ahmadi
    Nuclear Physics B, 2018
    In this paper, we explore the final stages of the black hole evaporation for Hayward solutions. Our results show that the behavior of Hawking's radiation changes considerably at the small radii regime such that the black hole does not evaporate completely and a stable remnant is left. We show that stability conditions hold for the Hayward solutions found in the Einstein gravity coupled with nonlinear electrodynamics. We analyze the effect that an inspired model of the noncommutativity of spacetime can have on the thermodynamics of Hayward spacetimes. This has been done by applying the noncommutative effects to the non-rotating and rotating Hayward black holes. In this setup, all point structures get replaced by smeared distributions owing to this inspired approach. The noncommutative effects result in a colder black hole in the small radii regime as Hayward's free parameter g increases. As well as the effects of noncommutativity and the rotation factor, the configuration of the remnant can be substantially affected by the parameter g. However, in the rotating solution it is not so sensitive to g with respect to the non-rotating case. As a consequence, Hayward's parameter, the noncommutativity and the rotation may raise the minimum value of energy for the possible formation of black holes in TeV-scale collisions. This observation can be used as a potential explanation for the absence of black holes in the current energy scales produced at particle colliders. However, it is also found that if extra dimensions do exist, then the possibility of the black hole production at energy scales accessible at the LHC for large numbers of extra dimensions will be larger.
  • A comparison of remnants in noncommutative Bardeen black holes
    S. Hamid Mehdipour, M. H. Ahmadi
    Astrophysics and Space Science, 2016
    We derive the mass term of the Bardeen metric in the presence of a noncommutative geometry induced minimal length. In this setup, the proposal of a stable black hole remnant as a candidate to store information is confirmed. We consider the possibility of having an extremal configuration with one degenerate event horizon and compare different sizes of black hole remnants. As a result, once the magnetic charge g$g$ of the noncommutative Bardeen solution becomes larger, both the minimal nonzero mass M0$M_{0}$ and the minimal nonzero horizon radius r0$r_{0}$ get larger. This means, subsequently, under the condition of an adequate amount of g$g$, the three parameters g$g$, M0$M_{0}$, and r0$r_{0}$ are in a connection with each other linearly. According to our results, a noncommutative Bardeen black hole is colder than the noncommutative Schwarzschild black hole and its remnant is bigger, so the minimum required energy for the formation of such a black hole at particle colliders will be larger. We also find a closely similar result for the Hayward solution.
  • Investigation of the possible correlations between the structural, optical and magnetic traits of NixZn1-xO nanoparticles fabricated via modified Pechini method
    Journal of Optoelectronics and Advanced Materials, 2015

RECENT SCHOLAR PUBLICATIONS

  • Physiological Measurement of Cognitive Load in Real and Virtual Tasks
    M Ahmadi, M BILLINGHURST, B WÜNSCHE
    School of Computer Science Auckland Bioengineering Institute The University … , 2026
    2026
  • Physical and gamma radiation shielding features of pure zinc oxide and copper doped zinc oxide: a comparison between experimental and simulated gamma shielding capability
    AR Khoshhal, A Bagheri Khatibani, E Basiri Tochaee, MH Ahmadi
    Bulletin of Materials Science 48 (4), 149 , 2025
    2025
    Citations: 1
  • Structural, morphological, and optical properties of sol-gel derived ZnO and ZnO: Cu and its application as a gamma ray attenuator
    M Shaddoust, AR Khoshhal, AB Khatibani, MH Ahmadi
    Applied Radiation and Isotopes 221, 111812 , 2025
    2025
    Citations: 6
  • Prominent ethylene glycol sensing of sol–gel-derived ZnO and Cu-ZnO nanostructures
    SFH Karouei, M Shaddoust, AB Khatibani, A Rezapour, MH Ahmadi
    Journal of Sol-Gel Science and Technology 111 (3), 736-753 , 2024
    2024
    Citations: 4
  • EEG, pupil dilations, and other physiological measures of working memory load in the Sternberg task
    M Ahmadi, SW Michalka, MA Najafabadi, BC Wünsche, M Billinghurst
    Multimodal Technologies and Interaction 8 (4), 34 , 2024
    2024
    Citations: 9
  • Prominent ethylene glycol sensing of sol-gel derived ZnO and ZnO: Cu nano-structures
    SFH Karouei, M Shaddoust, AB Khatibani, A Rezapour, MH Ahmadi
    2024
    Citations: 2
  • Improving CO2 sensing and pn conductivity transition under UV light by chemo-resistive sensor based on ZnO nanoparticles
    F Bagheri, H Haratizadeh, M Ahmadi
    Ceramics International 50 (1), 1497-1504 , 2024
    2024
    Citations: 10
  • 2023 Index IEEE Transactions on Circuits and Systems II: Express Briefs Vol. 70
    D Abbasi, M Abbasi, K Abbaszadeh, M Abdel-Aty, AB Abdel-Rahman, ...
    IEEE Transactions on Circuits and Systems II: Express Briefs 70 (12) , 2023
    2023
  • Effect of low and relatively long-term gamma irradiation on physical properties of ZnO and ZnO: Co thin films
    H Beigli, M Shaddoust, MH Ahmadi, AB Khatibani
    Journal of Sol-Gel Science and Technology 108 (3), 798-808 , 2023
    2023
    Citations: 26
  • Cognitive load measurement with physiological sensors in virtual reality during physical activity
    M Ahmadi, SW Michalka, S Lenzoni, M Ahmadi Najafabadi, H Bai, ...
    Proceedings of the 29th ACM symposium on virtual reality software and … , 2023
    2023
    Citations: 28
  • Comparing performance of dry and gel EEG electrodes in VR using MI paradigms
    M Ahmadi, A Farrokhi Nia, SW Michalka, AL Sumich, B Wuensche, ...
    Proceedings of the 29th ACM Symposium on Virtual Reality Software and … , 2023
    2023
    Citations: 4
  • Comparison of physiological cues for cognitive load measures in vr
    M Ahmadi, H Bai, A Chatburn, MA Najatabadi, BC Wünsche, ...
    2023 IEEE Conference on Virtual Reality and 3D User Interfaces Abstracts and … , 2023
    2023
    Citations: 13
  • PlayMeBack-Cognitive Load Measurement using Different Physiological Cues in a VR Game
    M Ahmadi, H Bai, A Chatburn, B Wuensche, M Billinghurst
    Proceedings of the 28th ACM Symposium on Virtual Reality Software and … , 2022
    2022
    Citations: 7
  • Low-dimensional purple and blue bronzes: Crystal growth, characterization and optical properties
    M Ahmadi
    2022
  • Growth, characterization and investigation of gas-sensing performance of graphene and copper-doped zinc oxide prepared by sol–gel method
    SK Charvadeh, S Nejatinia, AB Khatibani, MH Ahmadi
    Bulletin of Materials Science 45 (2), 61 , 2022
    2022
    Citations: 17
  • A comparative ab initio study of the structural, mechanical, electronic and optical behaviors of ZnO: Ni thin films with nanometer scale
    AA Ziabari, SJ Mousavi, MH Ahmadi
    Chinese journal of physics 57, 61-71 , 2019
    2019
    Citations: 2
  • Synthesis, mechanical properties and wear behavior of hybrid Al/(TiO2+ CuO) nanocomposites
    M Ahmadi, MH Siadati
    Journal of Alloys and Compounds 769, 713-724 , 2018
    2018
    Citations: 32
  • Black hole remnants in Hayward solutions and noncommutative effects
    SH Mehdipour, MH Ahmadi
    Nuclear Physics B 926, 49-69 , 2018
    2018
    Citations: 46
  • Effect of open student models on self-assessment, problem selection and learning
    M Ahmadi
    University of Canterbury , 2017
    2017
  • A comparison of remnants in noncommutative Bardeen black holes
    SH Mehdipour, MH Ahmadi
    Astrophysics and Space Science 361 (9), 314 , 2016
    2016
    Citations: 9

MOST CITED SCHOLAR PUBLICATIONS

  • Black hole remnants in Hayward solutions and noncommutative effects
    SH Mehdipour, MH Ahmadi
    Nuclear Physics B 926, 49-69 , 2018
    2018
    Citations: 46
  • Synthesis, mechanical properties and wear behavior of hybrid Al/(TiO2+ CuO) nanocomposites
    M Ahmadi, MH Siadati
    Journal of Alloys and Compounds 769, 713-724 , 2018
    2018
    Citations: 32
  • Cognitive load measurement with physiological sensors in virtual reality during physical activity
    M Ahmadi, SW Michalka, S Lenzoni, M Ahmadi Najafabadi, H Bai, ...
    Proceedings of the 29th ACM symposium on virtual reality software and … , 2023
    2023
    Citations: 28
  • Effect of low and relatively long-term gamma irradiation on physical properties of ZnO and ZnO: Co thin films
    H Beigli, M Shaddoust, MH Ahmadi, AB Khatibani
    Journal of Sol-Gel Science and Technology 108 (3), 798-808 , 2023
    2023
    Citations: 26
  • Growth, characterization and investigation of gas-sensing performance of graphene and copper-doped zinc oxide prepared by sol–gel method
    SK Charvadeh, S Nejatinia, AB Khatibani, MH Ahmadi
    Bulletin of Materials Science 45 (2), 61 , 2022
    2022
    Citations: 17
  • Synthesis and evaluation of bactericidal properties of Ag2O nanoparticles against Aeromonas hydrophila
    SR Shaffiey, SF Shaffiey, M Ahmadi
    International Journal of Nano Dimension 6 (3), 263 , 2015
    2015
    Citations: 17
  • Comparison of physiological cues for cognitive load measures in vr
    M Ahmadi, H Bai, A Chatburn, MA Najatabadi, BC Wünsche, ...
    2023 IEEE Conference on Virtual Reality and 3D User Interfaces Abstracts and … , 2023
    2023
    Citations: 13
  • Effect of starting composition on formation of MoSi 2 –SiC nanocomposite powder via ball milling
    M Zakeri, M Ahmadi
    Bulletin of Materials Science 35 (4), 533-538 , 2012
    2012
    Citations: 13
  • Improving CO2 sensing and pn conductivity transition under UV light by chemo-resistive sensor based on ZnO nanoparticles
    F Bagheri, H Haratizadeh, M Ahmadi
    Ceramics International 50 (1), 1497-1504 , 2024
    2024
    Citations: 10
  • Mechanochemical synthesis of MoSi2–SiC nanocomposite powder
    M Zakeri, M Ahmadi
    Ceramics International 38 (4), 2977-2982 , 2012
    2012
    Citations: 10
  • EEG, pupil dilations, and other physiological measures of working memory load in the Sternberg task
    M Ahmadi, SW Michalka, MA Najafabadi, BC Wünsche, M Billinghurst
    Multimodal Technologies and Interaction 8 (4), 34 , 2024
    2024
    Citations: 9
  • A comparison of remnants in noncommutative Bardeen black holes
    SH Mehdipour, MH Ahmadi
    Astrophysics and Space Science 361 (9), 314 , 2016
    2016
    Citations: 9
  • Synthesis of copper oxide (CuO) nanoparticles and surveying its bactericidal properties against Aeromonas Hydrophila bacteria
    SF Shaffiey, M Ahmadi, SR Shaffiey, M Shapoori, H Varshoie, F Azari
    Journal of Fasa University of Medical Sciences 5 (1), 36-43 , 2015
    2015
    Citations: 9
  • PlayMeBack-Cognitive Load Measurement using Different Physiological Cues in a VR Game
    M Ahmadi, H Bai, A Chatburn, B Wuensche, M Billinghurst
    Proceedings of the 28th ACM Symposium on Virtual Reality Software and … , 2022
    2022
    Citations: 7
  • Structural, morphological, and optical properties of sol-gel derived ZnO and ZnO: Cu and its application as a gamma ray attenuator
    M Shaddoust, AR Khoshhal, AB Khatibani, MH Ahmadi
    Applied Radiation and Isotopes 221, 111812 , 2025
    2025
    Citations: 6
  • Prominent ethylene glycol sensing of sol–gel-derived ZnO and Cu-ZnO nanostructures
    SFH Karouei, M Shaddoust, AB Khatibani, A Rezapour, MH Ahmadi
    Journal of Sol-Gel Science and Technology 111 (3), 736-753 , 2024
    2024
    Citations: 4
  • Comparing performance of dry and gel EEG electrodes in VR using MI paradigms
    M Ahmadi, A Farrokhi Nia, SW Michalka, AL Sumich, B Wuensche, ...
    Proceedings of the 29th ACM Symposium on Virtual Reality Software and … , 2023
    2023
    Citations: 4
  • Prominent ethylene glycol sensing of sol-gel derived ZnO and ZnO: Cu nano-structures
    SFH Karouei, M Shaddoust, AB Khatibani, A Rezapour, MH Ahmadi
    2024
    Citations: 2
  • A comparative ab initio study of the structural, mechanical, electronic and optical behaviors of ZnO: Ni thin films with nanometer scale
    AA Ziabari, SJ Mousavi, MH Ahmadi
    Chinese journal of physics 57, 61-71 , 2019
    2019
    Citations: 2
  • Physical and gamma radiation shielding features of pure zinc oxide and copper doped zinc oxide: a comparison between experimental and simulated gamma shielding capability
    AR Khoshhal, A Bagheri Khatibani, E Basiri Tochaee, MH Ahmadi
    Bulletin of Materials Science 48 (4), 149 , 2025
    2025
    Citations: 1