List of Articles CNT

• Open Access Article
  • Abstract Page
  • Full-Text
  
  1 - Improved efficiency of a SiGe thin film solar cell structure using CNT charge collector layer
  Homa Hashemi Madani Mohammad Reza Shayesteh Mohammad Reza Moslemi
  10.30495/jtap.162239
• Open Access Article
  • Abstract Page
  • Full-Text
  
  2 - Quantum analytical modeling and simulation of CNT on insulator (COI) and CNT on nothing (CON) FET: a comparative analysis
  Sudipta Mukherjee Dipan Bandyopadhyay Pranab Kishore Dutta Subir Kumar Sarkar
  10.1007/s40094-015-0205-5
• Open Access Article
  • Abstract Page
  • Full-Text
  
  3 - Theoretical analysis on nonlinear vibration of fluid flow in single-walled carbon nanotube
  P. Valipour S. E. Ghasemi Mohammad Reza Khosravani D. D. Ganji
  10.1007/s40094-016-0217-9
• Open Access Article
  • Abstract Page
  • Full-Text
  
  4 - Fabrication of Au/ZnO/MWCNTs electrode and its characterization for electrochemical cholesterol biosensor
  Davood Ghanei Agh Kaariz Elham Darabi Seyed Mohammad Elahi
  10.1007/s40094-020-00390-5
• Open Access Article
  • Abstract Page
  • Full-Text
  
  5 - The effects of Na & Mg adsorption on the electrical properties of SiCNTs: A DFT study
  Mahdi Rezaei Sameti M. Rakhshi
• Open Access Article
  • Abstract Page
  • Full-Text
  
  6 - Enhanced removal of humic acids (HAs) from aqueous solutions using MWCNTs modified by N-(3-nitro-benzylidene)-N-trimethoxysilylpropyl-ethane-1,2-diamine on Equilibrium, thermodynamic and kinetics
  nima karachi
• Open Access Article
  • Abstract Page
  • Full-Text
  
  7 - Density Functional Theory Calculations of Functionalized Carbon Nanotubes with Metformin as Vehicles for Drug Delivery
  Morteza Keshavarz
• Open Access Article
  • Abstract Page
  • Full-Text
  
  8 - Theoretical Study of Addition Reaction of Carbene and Zigzag Single-walled Carbon Nanotube
  Saeid Abedini Khoramie Shahram Moradi Somayeh Miryousefi Samira Eftekharjoo
• Open Access Article
  • Abstract Page
  • Full-Text
  
  9 - Adsorption of Carbon Monoxide on a (6, 6) Armchair Carbon Nanotube: Ab initio Study
  F. Saremi H.H. Haeri A.H. Hasani N. Mansouri
• Open Access Article
  • Abstract Page
  • Full-Text
  
  10 - Investigation of Solvent Effects on Interaction of Single-Strand DNA with Open-End of Single Walled Carbon Nanotubes Using QM and MM methods
  B. Ghalandari F. Mollaamin L. Pishkar B. Khalili Haddad
• Open Access Article
  • Abstract Page
  • Full-Text
  
  11 - Characterization of Carbon Nanotube (CNT) in Adsorption Gas: Monte Carlo and Langevin Dynamic Simulation
  L. Mahdavian M. Monajjemi R. Zhiani
• Open Access Article
  • Abstract Page
  • Full-Text
  
  12 - Investigation of nuclear magnetic resonance (NMR) and Binding Energies Clonidine Drug-Carbon Nano Tube: A Theoretical Study
  Z. Yousefian
• Open Access Article
  • Abstract Page
  • Full-Text
  
  13 - Immobilization of laccase in nafion and carbon nanotubes biocathode of Biofuel cells and Biosensors
  maasome ahmadi
• Open Access Article
  • Abstract Page
  • Full-Text
  
  14 - Green Synthesis and Investigation of Antioxidant Activity of New Quinoline Derivatives
  Seyyed Ali Moghaddas Zinatossadat Hossaini Daryoush Zareyee
• Open Access Article
  • Abstract Page
  • Full-Text
  
  15 - Preparation of (MWCNTs)-COOH/CeO2Hybrid as an Efficient Catalyst for Claisen-Schmidt Condensation
  Tahereh Heidarzadeh Navabeh Nami Daryoush Zareyee
• Open Access Article
  • Abstract Page
  • Full-Text
  
  16 - An efficient Imprecise 4:2 Compressor Using Gate Diffusion Input Supplemented with Dynamic Threshold
  Forouzan Bahrami Nabiollah Shiri Farshad Pesaran
  10.30495/jce.2023.1987535.1203
• Open Access Article
  • Abstract Page
  • Full-Text
  
  17 - Low-Power and Reliable Approximate Subtractors for Image Processing Applications
  Fatemeh Pooladi Farshad Pesaran Nabiollah Shiri
  10.30495/jce.2023.1988196.1208
• Open Access Article
  • Abstract Page
  • Full-Text
  
  18 - Low-Power Differential Voltage-Controlled Ring Oscillator Based on Carbon Nanotube Field-Effect Transistor (CNTFET)
  Saba Naseri Akbar
  10.30495/jce.2023.1996352.1223
• Open Access Article
  • Abstract Page
  • Full-Text
  
  19 - Solid phase exteraction of trace Cu(II) in Islamshar waste water samples using modified Multiwall nano tube carbon
  ali moghimi mohsen shabani
• Open Access Article
  • Abstract Page
  • Full-Text
  
  20 - Preconcentration of Amlodipine using Fe3O4@MWCNT- chitosan compositeand determinated by UV-Visb in biologycal samples
  ali moghimi Niloufar Tajodini Mohammad Yari
• Open Access Article
  • Abstract Page
  • Full-Text
  
  21 - Study of exteraction of trace diazepam in water samples using Modified NanoTube carboxyl as sorbent
  ali moghimi Milad Abniki Fatemeh Hajikarimi
• Open Access Article
  • Abstract Page
  • Full-Text
  
  22 - Preconcentration of trace Co (II) in water samples using modified Multiwall nano tube carbon
  ali moghimi Nilofar Tajodini Milad Abniki
• Open Access Article
  • Abstract Page
  • Full-Text
  
  23 - Dispersive solid-phase extraction for preconcentration of Amlodipine in aqueous samples using Fe3O4@MWCNT- β cyclodextrin composite
  ali moghimi Mostafa Shojai Milad Abniki
• Open Access Article
  • Abstract Page
  • Full-Text
  
  24 - Study of Carbon Monoxide Oxidation Kinetics on Bio-synthesized of Ag Nanoparticles/Multi-walled Carbon Nanotubes (Ag/MWF-CNT) Nano-Catalysts under Various Conditions
  N. Yousefi M. Pazouki M. Alizadeh F. Alikhani-Hesari
• Open Access Article
  • Abstract Page
  • Full-Text
  
  25 - Surface Characteristics Improvement of AZ31B Magnesium by Surface Compositing with Carbon Nano-tubes through Friction Stir Processing
  M. Soltani M. Shamanian B. Niroumand
• Open Access Article
  • Abstract Page
  • Full-Text
  
  26 - Thermomechanical Properties of the Polymeric Nanocomposite Predicted by Molecular Dynamics
  Majid Hadipeykani farshid Aghadavoudi Davood Toghraie
• Open Access Article
  • Abstract Page
  • Full-Text
  
  27 - Curvature Effects on Thermal Buckling Load of DWCNT Under Axial Compression Force
  A Ghorbanpour Arani M Mohammadimehr M Ghazi
• Open Access Article
  • Abstract Page
  • Full-Text
  
  28 - Magneto-Thermo-Elastic Behavior of Cylinder Reinforced with FG SWCNTs Under Transient Thermal Field
  A Ghorbanpour Arani M.R Mozdianfard V Sadooghi M Mohammadimehr R Kolahchi
• Open Access Article
  • Abstract Page
  • Full-Text
  
  29 - Nonlinear Vibration Analysis of the Fluid-Filled Single Walled Carbon Nanotube with the Shell Model Based on the Nonlocal Elacticity Theory
  P Soltani R Bahramian J Saberian
• Open Access Article
  • Abstract Page
  • Full-Text
  
  30 - Thermal Stress Analysis of a Composite Cylinder Reinforced with FG SWCNTs
  A Ghorbanpour Arani S Amir V Sadooghi M Mohammadimehr
• Open Access Article
  • Abstract Page
  • Full-Text
  
  31 - Surface Stress Effect on the Nonlocal Biaxial Buckling and Bending Analysis of Polymeric Piezoelectric Nanoplate Reinforced by CNT Using Eshelby-Mori-Tanaka Approach
  M Mohammadimehr B Rousta Navi A Ghorbanpour Arani
• Open Access Article
  • Abstract Page
  • Full-Text
  
  32 - Nonlinear Nonlocal Vibration of an Embedded Viscoelastic Y-SWCNT Conveying Viscous Fluid Under Magnetic Field Using Homotopy Analysis Method
  A Ghorbanpour Arani M.Sh Zarei
• Open Access Article
  • Abstract Page
  • Full-Text
  
  33 - Dynamic Instability of Visco-SWCNTs Conveying Pulsating Fluid Based on Sinusoidal Surface Couple Stress Theory
  A Ghorbanpour Arani R Kolahchi M Jamali M Mosayyebi I Alinaghian
• Open Access Article
  • Abstract Page
  • Full-Text
  
  34 - Nonlocal Vibration of Y-SWCNT Conveying Fluid Considering a General Nonlocal Elastic Medium
  A.H Ghobanpour Arani A Rastgoo A Ghorbanpour Arani M. Sh. Zarei
• Open Access Article
  • Abstract Page
  • Full-Text
  
  35 - Buckling Analysis of a Double-Walled Carbon Nanotube Embedded in an Elastic Medium Using the Energy Method
  A Ghorbanpour Arani M Shokravi M Mohammadimehr
• Open Access Article
  • Abstract Page
  • Full-Text
  
  36 - Creep Evolution Analysis of Composite Cylinder Made of Polypropylene Reinforced by Functionally Graded MWCNTs
  A Loghman H Shayestemoghadam E Loghman
• Open Access Article
  • Abstract Page
  • Full-Text
  
  37 - Study of the effects of solvent and temperature on the Connections of the MTX and L-FMTX with single-walled carbon nanotubes using QM and MM
  Vahid Khodadadi neda hasanzadeh Hoorye Yahyaei Ayeh Raayatzadeh
• Open Access Article
  • Abstract Page
  • Full-Text
  
  38 - The electrical and structural study of interaction HCN gas with SiCNTs: A DFT approach
  M. Rezaei Sameti S Taghizadeh Najaf Abad E Shiravand K Abdoli
• Open Access Article
  • Abstract Page
  • Full-Text
  
  39 - Preconcentration of trace amounts of Ni(II) in waste water samples Islamshahr using modified Multiwall nano tube carbon
  Mohammd Yari Ali Moghimi Narges Behzad Ali Yari Mahnaz Qomi
• Open Access Article
  • Abstract Page
  • Full-Text
  
  40 - Preconcentration of trace amounts of Pb(II) in Varamin waste water samples using modified Multiwall nano tube carbon
  Mohammd Yari Ali Moghimi Narges Behzad Elham Pournamdari
• Open Access Article
  • Abstract Page
  • Full-Text
  
  41 - An Experimental Investigation on the Effects of Shear Rate on Dynamic Viscosity of MWCNT-ZnO/Engine Oil on Different Temperatures and Solid Concentrations
  meisam asadi seyfolah saedodin
• Open Access Article
  • Abstract Page
  • Full-Text
  
  42 - An Experimental Investigation on performance of MWCNT-water nanofluid in a flat plate solar water heater under natural and forced circulations
  kourosh hasanzade Amid Khosrowdad
• Open Access Article
  • Abstract Page
  • Full-Text
  
  43 - An overview of carbon nanotubes and their fabrication method
  mojtaba jamiati
• Open Access Article
  • Abstract Page
  • Full-Text
  
  44 - Electromagnetic Waves Absorption of the Epoxy Resin-MWCNT Composite Synthesis via Ultrasonic Bath and Milling Process
  Sadegh Shahriyari Mahdi Omidi Seyyed Ali Hassanzadeh Tabrizi Mahdi Yeganeh Hamid Reza Bakhsheshi-Rad
• Open Access Article
  • Abstract Page
  • Full-Text
  
  45 - Solvothermal synthesis of copper nanoparticles loaded on multi-wall carbon nanotubes as catalyst for thermal decomposition of ammonium perchlorate
  Hassan Tavakoli Rasoul Sarraf-Mamoory Alireza zarei
• Open Access Article
  • Abstract Page
  • Full-Text
  
  46 - Fabrication of Al7075-MWCNT Composite Powder by Recycling Aluminum Alloy Chips Via High Energy Milling and Alloying
  Parisa Fekri Dolatabad Vahid Pouyafar Ramin Meshkabadi
• Open Access Article
  • Abstract Page
  • Full-Text
  
  47 - An investigation of carbon nanotubes on shear stress, thermal conductivity and the viscosity of Nanofluids
  Aref Shokri
  10.22034/jna.2020.1898692.1209
• Open Access Article
  • Abstract Page
  • Full-Text
  
  48 - Electrochemical sensor based on SmHCF/multiwalled carbon nanotube modified glassy carbon electrode for dopamine
  taher yousefi Ghasem Adollahi Mohammad hossein mashadizadeh ramin yavari
  10.22034/jna.2021.1921591.1245
• Open Access Article
  • Abstract Page
  • Full-Text
  
  49 - Separation and Quantification of Hydrocarbons of LPG Using Novel MWCNT-Silica Gel Nanocomposite as Packed Column Adsorbent of Gas Chromatography
  Seyed Mojtaba Mostafavi Masoumeh Piryaei Ahmad Rouhollahi Ali Mohajeri
  10.22034/jna.2014.01.001
• Open Access Article
  • Abstract Page
  • Full-Text
  
  50 - Separation of Aromatic and Alcoholic Mixtures using Novel MWCNT-Silica Gel Nanocomposite as an Adsorbent in Gas Chromatography
  Seyed Mojtaba Mostafavi Ahmad Rouhollahi Ali Mohajeri Masoumeh Piryaei
  10.22034/jna.2014.01.002
• Open Access Article
  • Abstract Page
  • Full-Text
  
  51 - Quantitative Determination of LPG Hydrocarbons by Modified Packed Column Adsorbent of Gas Chromatography Via Full Factorial Design
  Asghar Pasban Seyed Mojtaba Mostafavi Hanieh Malekzadeh Benyamin Mohammad Nazari
  10.22034/jna.2017.01.004
• Open Access Article
  • Abstract Page
  • Full-Text
  
  52 - Green Biosynthesis of Silver Functionalized Multi-Walled Carbon Nanotubes, Using Satureja Hortensis L Water Extract and Its Bactericidal Activity
  Sajjad Sedaghat
  10.22034/jna.2017.01.007
• Open Access Article
  • Abstract Page
  • Full-Text
  
  53 - Theoretical insights into the encapsulation of anticancer Oxaliplatin drug into single walled carbon nanotubes
  Mahyar Rezvani Iran Ahmadnezhad Masoud Darvish Ganji Maria Fotukian
  10.22034/jna.2016.03.001
• Open Access Article
  • Abstract Page
  • Full-Text
  
  54 - BTX Hydrogenation in liquid phase using nanoparticles of Cobalt/MWCNTs and data analysis using RSM method
  Mohammad Teymouri Mohammad Mahdi Khodaei Majid Hashemi
  10.22034/jna.2015.01.003
• Open Access Article
  • Abstract Page
  • Full-Text
  
  55 - Fluorouracil functionalized Pt-doped carbon nanotube as drug delivery nanocarrier for anticarcinogenic drug: a B3LYP-D3 study
  Zahra Khalili Masoud Darvish Ganji Maryam Mehdizadeh
  10.22034/jna.2018.543692
• Open Access Article
  • Abstract Page
  • Full-Text
  
  56 - Electrochemical sensor based on SmHCF/multiwalled carbon nanotube modified glassy carbon electrode for dopamine
  NGhasem Abdollahi taher yousefi Mohammad Hossein Mashadizadeh Ramin Yavari
  10.22034/jna.2021.690111
• Open Access Article
  • Abstract Page
  • Full-Text
  
  57 - An investigation of carbon nanotubes on shear stress, thermal conductivity and the viscosity of Nanofluids
  Aref Shokri
  10.22034/jna.2022.680846
• Open Access Article
  • Abstract Page
  • Full-Text
  
  58 - Production of Dispersed Ceramic Nano-Particles in Al Alloy Using Friction Stir Processing
  Amin Rabiezadeh Ahmad Afsari
• Open Access Article
  • Abstract Page
  • Full-Text
  
  59 - A New 2-input CNTFET-Based XOR Cell With Ultra-Low Leakage Power For Low-Voltage and Low-Power Full Adders
  Amir Baghi Rahin Vahid Baghi Rahin
• Open Access Article
  • Abstract Page
  • Full-Text
  
  60 - Green synthesis of oxazole triazole derivatives: Application of Fe3O4@MWCNT MNCs
  Samaneh Sadat Sharifi Seyyed Jalal Shams Najafi Majid Ghazanfarpour
• Open Access Article
  • Abstract Page
  • Full-Text
  
  61 - Synthesis of some chiral compounds using (MWCNTs)-COOH/Fe3O4-CaO magnetic nanostructures
  Omekolsoom Shabani Navabeh Nami Rahimeh Hajinasiri Masoumeh Hosseinzadeh
  10.30495/iranjoc.2023.699822
• Open Access Article
  • Abstract Page
  • Full-Text
  
  62 - New method for preparation of MWCNT-SO3H as an efficient and reusable catalyst for the solvent-free synthesis of 3,4-dihydropyrimidin-2(1H)-ones/thiones
  Leila Moradi Gholam Reza Najafi Hakimeh Saeidiroshan
• Open Access Article
  • Abstract Page
  • Full-Text
  
  63 - Effects of Multi-Wall Carbon Nano Tube (MWCNT) on Nepeta cataria and Salvia sclarea In Vitro culture
  Hekmat A likhani Mehrjardi Parissa Jonoubi Ahmad Majd Reza Haji Hosseini
  10.30495/ijpp.2022.1953545.1406
• Open Access Article
  • Abstract Page
  • Full-Text
  
  64 - Design and Implementation of MOSFET Circuits and CNTFET, Ternary Multiplier in the Field of Galois
  Malakeh Karimghasemi-rabori Peiman Keshavarzian
• Open Access Article
  • Abstract Page
  • Full-Text
  
  65 - Investigating of Ultrastructure and Histology Leaf and Root of castor seeds (Ricinus communis L.) under concentrations of multi-walled carbon nanotubes
  Zahra Fathi Ramazan Ali Khavari-Nejad Homa Mahmoodzadeh Taher Nejad-Sattari
• Open Access Article
  • Abstract Page
  • Full-Text
  
  66 - بررسی تأثیر ریخت نانوهیبرید سیلیسیم اکسید و نانولوله‌های‌کربنی چند دیواره در پایداری امولسیون برای ازدیاد برداشت نفت
  مهشید ارشادی مهشاد علائی علی رمضانی علیمراد رشیدی سارا خسروانی
• Open Access Article
  • Abstract Page
  • Full-Text
  
  67 - بررسی نانوکاتالیست‌های Ni2P و Ni2P-Mo بر پایه‌ی نانولوله‌های کربنی (CNTs) برای فرایند گوگردزدایی از گازوییل
  حمیدرضا آقابزرگ مونا کیانی علیمراد رشیدی خیرالله جعفری جوزانی
• Open Access Article
  • Abstract Page
  • Full-Text
  
  68 - Detection of Escherichia coli in pharmaceutical and water samples using a biosensor based on carbon nanotubes containing gold nanoparticles
  Fatemeh Behoftadeh Mohammad Faezi Ghasemi Ali Mojtahedi khosro Issazadeh Mostafa Golshekan
  10.30495/jmw.2023.1990858.2069
• Open Access Article
  • Abstract Page
  • Full-Text
  
  69 - Efficient Parameters Selection for CNTFET Modelling Using Artificial Neural Networks
  Roya Abdollahzadeh Badelbo Fardad Farokhi Alireza Kashaniniya
• Open Access Article
  • Abstract Page
  • Full-Text
  
  70 - Adsorption and Removal of Pollutants (dyes) from Wastewater Using Different Types of Low-cost Adsorbents: A review
  Ahmed B. Mahdi Aseel M. Aljeboree Ayad F. Alkaim
  10.22034/jchr.2021.682032
• Open Access Article
  • Abstract Page
  • Full-Text
  
  71 - Investigation of the Effect of Atomic Structure Defects on the Thermal Expansion Coefficient of Zigzag and Armchair Carbon Nanotubes Using Molecular Dynamics Method
  Farshid Aghadavoudi Hossein Golestanian
• Open Access Article
  • Abstract Page
  • Full-Text
  
  72 - The effect of (nano, mesoporous) alumina and their composite with MWCNT additives on microstructure, physical and mechanical properties of alumina-C refractories
  Amirabbas Nourbakhsh
• Open Access Article
  • Abstract Page
  • Full-Text
  
  73 - The Effects of Adding Multi-Walled Carbon Nanotubes (MWCNT) on the Mechanical Properties and Biocompatibility of The Ultra-High Molecular Weight Polyethylene Polymer Matrix (UHMWPE) in Joint Replacements
  Mohsen Fakoori Mohammad Taghi khorassani Mehdi kamali dolat abadi
  10.22034/ascij.2022.1974726.1446
• Open Access Article
  • Abstract Page
  • Full-Text
  
  74 - بررسی آزمایشگاهی اثر نانوذرات جامد هیبریدی نانولوله کربنی و اکسید منیزیم بر هدایت حرارتی اتیلن گلیکول
  مسعود وفایی مسعود افرند
• Open Access Article
  • Abstract Page
  • Full-Text
  
  75 - Advancing biomedical, food, and industrial applications through carbon nanomaterials: current status and future perspectives
  A. Abdollahpour Ayda Ranjbar Azadeh Asefnejad Bahareh Kamyab Moghadas Yashar Ghaffari David Otasowie Ogbemudia Mehid Taheri
  10.71939/jsme.2023.1092090
• Open Access Article
  • Abstract Page
  • Full-Text
  
  76 - A theoretical study of the stability of Alkylating Agent drug Chlorambucil with carbon nanotubes and boron nitride nanotubes: Quantum Mechanics/Molecular Mechanics (QM/MM) Methods
  Mohammad Hassan   Jamshidi Neda Hasanzadeh Hooriye Yahyaei Amir Bahrami
• Open Access Article
  • Abstract Page
  • Full-Text
  
  77 - Investigation of wear properties of Al6061 alloy and composite containing CNT produced by mechanical alloying and hot pressing process
  mahdi omidi saeid nategh Arash Etemad mohammad reza rostami mohammad esmaeil shafiei
• Open Access Article
  • Abstract Page
  • Full-Text
  
  78 - Self-heating effect modeling of a carbon nanotube-based fieldeffect transistor (CNTFET)
  Kazem Pourchitsaz Mohammad Reza Shayesteh
• Open Access Article
  • Abstract Page
  • Full-Text
  
  79 - A Novel Design of Penternary Inverter Gate Based on Carbon Nano Tube
  Mahdieh Nayeri peiman keshavarzian Maryam Nayeri
• Open Access Article
  • Abstract Page
  • Full-Text
  
  80 - Computational Investigation on Structural Properties of Carbon Nanotube Binding to Nucleotides According to the QM Methods
  Nima Karachi Masoomeh Emadi Mojtaba Servatkhah
• Open Access Article
  • Abstract Page
  • Full-Text
  
  81 - Strained Carbon Nanotube (SCNT) Thin Layer Effect on GaAs Solar Cells Efficiency
  S.N jafari Abbas Ghadimi s. rouhi
• Open Access Article
  • Abstract Page
  • Full-Text
  
  82 - A Carbon Nanotube (CNT)-based SiGe Thin Film Solar Cell Structure
  Homa hashemi madani Mohammad Reza Shayesteh Mohammad Reza Moslemi
  10.30495/jopn.2021.4541
• Open Access Article
  • Abstract Page
  • Full-Text
  
  83 - Data-Driven State Estimation of Carbon Nanotube Field Effect Transistor with Smart RBF Network
  Hossein Afkhami Faridoon Shabani Nia Jamshid Aghaei
  10.30495/jopn.2022.30232.1262
• Open Access Article
  • Abstract Page
  • Full-Text
  
  84 - Computational Investigation on Anti-Cancer Drugs/ Carbon Nanotube as a Drug Delivery System
  Nima Karachi
  10.30495/jopn.2023.32101.1295
• Open Access Article
  • Abstract Page
  • Full-Text
  
  85 - Investigation of the performance of Fluorouracil and azathioprine anticancer drugs with SWNT and BNNT: Molecular and Quantum Mechanical Calculations
  Fatemeh Moosavi Neda Hasanzadeh Hooriye Yahyaei Ayeh Rayatzadeh