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Moataz Abdulhafez
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Journal Articles

Order-of-Magnitude Increase in Carbon Nanotube Yield Based on Modeling Transient Diffusion and Outgassing of Water From Reactor Walls

Golnaz Tomaraei, Moataz Abdulhafez, Mostafa Bedewy
Journal: Journal of Manufacturing Science and Engineering
Publisher: ASME
Article Type: Research Papers
J. Manuf. Sci. Eng. April 2024, 146(4): 041001.
Paper No: MANU-23-1378
https://doi.org/10.1115/1.4063965
Published Online: February 26, 2024
View Article titled, Order-of-Magnitude Increase in Carbon Nanotube Yield Based on Modeling Transient Diffusion and Outgassing of Water From Reactor Walls
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Topics: Carbon nanotubes, Modeling, Water, Water vapor, Diffusion (Physics), Chemical vapor deposition
Proceedings Papers

Suppression of Catalyst Diffusion Into Alumina Support in Dynamic Chemical Vapor Deposition of Carbon Nanotube

Golnaz Tomaraei, Jaegeun Lee, Seung Min Kim, Moataz Abdulhafez, Mostafa Bedewy
Proc. ASME. MSEC2023, Volume 2: Manufacturing Equipment and Automation; Manufacturing Processes; Manufacturing Systems; Nano/Micro/Meso Manufacturing; Quality and Reliability, V002T08A004, June 12–16, 2023
Publisher: American Society of Mechanical Engineers
Paper No: MSEC2023-104979
https://doi.org/10.1115/MSEC2023-104979
View Paper titled, Suppression of Catalyst Diffusion Into Alumina Support in Dynamic Chemical Vapor Deposition of Carbon Nanotube
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Topics: Carbon nanotubes, Catalysts, Chemical vapor deposition, Diffusion (Physics), Iron, Temperature, Modeling, Thin films, Annealing, Density
Proceedings Papers

Unexpectedly High Yields in Chemical Vapor Deposition of Carbon Nanotubes Based on Reactor Wall Thermochemical History

Golnaz Tomaraei, Moataz Abdulhafez, Mostafa Bedewy
Proc. ASME. MSEC2022, Volume 1: Additive Manufacturing; Biomanufacturing; Life Cycle Engineering; Manufacturing Equipment and Automation; Nano/Micro/Meso Manufacturing, V001T07A014, June 27–July 1, 2022
Publisher: American Society of Mechanical Engineers
Paper No: MSEC2022-85633
https://doi.org/10.1115/MSEC2022-85633
View Paper titled, Unexpectedly High Yields in Chemical Vapor Deposition of Carbon Nanotubes Based on Reactor Wall Thermochemical History
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Topics: Carbon nanotubes, Chemical vapor deposition, Carbon, Dynamics (Mechanics), Manufacturing, Modeling, Oxygen, Robustness, Sensors, Water vapor
Journal Articles

Sequential Self-Folding of Shape Memory Polymer Sheets by Laser Rastering Toward Origami-Based Manufacturing

Moataz Abdulhafez, Joshua Line, Mostafa Bedewy
Journal: Journal of Manufacturing Science and Engineering
Publisher: ASME
Article Type: Research Papers
J. Manuf. Sci. Eng. September 2021, 143(9): 091008.
Paper No: MANU-20-1685
https://doi.org/10.1115/1.4050463
Published Online: April 1, 2021
View Article titled, Sequential Self-Folding of Shape Memory Polymer Sheets by Laser Rastering Toward Origami-Based Manufacturing
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Topics: Lasers, Manufacturing, Shape memory polymers
Journal Articles

Reducing Variability in Chemical Vapor Deposition of Carbon Nanotubes Based on Gas Purification and Sample Support Redesign

Golnaz Tomaraei, Jaegeun Lee, Moataz Abdulhafez, Mostafa Bedewy
Journal: Journal of Micro and Nano-Manufacturing
Publisher: ASME
Article Type: Research-Article
J. Micro Nano-Manuf. March 2021, 9(1): 011002.
Paper No: JMNM-20-1016
https://doi.org/10.1115/1.4050010
Published Online: March 2, 2021
View Article titled, Reducing Variability in Chemical Vapor Deposition of Carbon Nanotubes Based on Gas Purification and Sample Support Redesign
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Topics: Carbon nanotubes, Density, Chemical vapor deposition, Semiconductor wafers, Design, Cylinders
Journal Articles

Current-Dependent Dynamics of Bidirectional Self-Folding for Multi-Layer Polymers Using Local Resistive Heating

Moataz Elsisy, Evan Poska, Moataz Abdulhafez, Mostafa Bedewy
Journal: Journal of Engineering Materials and Technology
Publisher: ASME
Article Type: Research Papers
J. Eng. Mater. Technol. July 2021, 143(3): 031004.
Paper No: MATS-20-1188
https://doi.org/10.1115/1.4049588
Published Online: February 3, 2021
View Article titled, Current-Dependent Dynamics of Bidirectional Self-Folding for Multi-Layer Polymers Using Local Resistive Heating
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Topics: Heating, Polymers, Dynamics (Mechanics), Finite element model, Currents, Relaxation (Physics)
Proceedings Papers

Bio-Inspired Self-Folding of Shape Memory Polymer Sheets by Laser Rastering

Joshua Line, Moataz Abdulhafez, Mostafa Bedewy
Proc. ASME. MSEC2020, Volume 1: Additive Manufacturing; Advanced Materials Manufacturing; Biomanufacturing; Life Cycle Engineering; Manufacturing Equipment and Automation, V001T03A019, September 3, 2020
Publisher: American Society of Mechanical Engineers
Paper No: MSEC2020-8374
https://doi.org/10.1115/MSEC2020-8374
View Paper titled, Bio-Inspired Self-Folding of Shape Memory Polymer Sheets by Laser Rastering
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Topics: Biomimetics, Lasers, Shape memory polymers, Manufacturing, Polymers, Additive manufacturing, Carbon dioxide lasers, Cutting, Deformation, Doors
Proceedings Papers

Reducing Variability in Chemical Vapor Deposition of Carbon Nanotubes Based on Gas Purification and Sample Support Redesign

Golnaz Tomaraei, Moataz Abdulhafez, Jaegeun Lee, Mostafa Bedewy
Proc. ASME. MSEC2020, Volume 1: Additive Manufacturing; Advanced Materials Manufacturing; Biomanufacturing; Life Cycle Engineering; Manufacturing Equipment and Automation, V001T03A020, September 3, 2020
Publisher: American Society of Mechanical Engineers
Paper No: MSEC2020-8388
https://doi.org/10.1115/MSEC2020-8388
View Paper titled, Reducing Variability in Chemical Vapor Deposition of Carbon Nanotubes Based on Gas Purification and Sample Support Redesign
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Topics: Carbon nanotubes, Chemical vapor deposition, Design, Semiconductor wafers, Carbon, Density, Gas flow, Helium, Oxygen, Plumbing
Proceedings Papers

Laser-Induced Nanocarbon Formation for Tuning Surface Properties of Commercial Polymers

Moataz Abdulhafez, Angela J. McComb, Mostafa Bedewy
Proc. ASME. MSEC2020, Volume 1: Additive Manufacturing; Advanced Materials Manufacturing; Biomanufacturing; Life Cycle Engineering; Manufacturing Equipment and Automation, V001T03A018, September 3, 2020
Publisher: American Society of Mechanical Engineers
Paper No: MSEC2020-8339
https://doi.org/10.1115/MSEC2020-8339
View Paper titled, Laser-Induced Nanocarbon Formation for Tuning Surface Properties of Commercial Polymers
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Topics: Lasers, Polymers, Surface properties, Hydrophobicity, Water, Anisotropy, Electron microscopy, Hydrophilicity, Manufacturing, Nanoscale phenomena
Journal Articles

Tailoring Surface Hydrophobicity of Commercial Polyimide by Laser-Induced Nanocarbon Texturing

Moataz Abdulhafez, Angela J. McComb, Mostafa Bedewy
Journal: Journal of Micro and Nano-Manufacturing
Publisher: ASME
Article Type: Research-Article
J. Micro Nano-Manuf. September 2020, 8(3): 031006.
Paper No: JMNM-20-1023
https://doi.org/10.1115/1.4048600
Published Online: October 26, 2020
View Article titled, Tailoring Surface Hydrophobicity of Commercial Polyimide by Laser-Induced Nanocarbon Texturing
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Topics: Anisotropy, Lasers, Water, Hydrophobicity, Strain gages, Drops
Journal Articles

In Situ Measurement of Carbon Nanotube Growth Kinetics in a Rapid Thermal Chemical Vapor Deposition Reactor With Multizone Infrared Heating

Moataz Abdulhafez, Jaegeun Lee, Mostafa Bedewy
Journal: Journal of Micro and Nano-Manufacturing
Publisher: ASME
Article Type: Technical Briefs
J. Micro Nano-Manuf. March 2020, 8(1): 010902.
Paper No: JMNM-19-1042
https://doi.org/10.1115/1.4046033
Published Online: February 13, 2020
View Article titled, In Situ Measurement of Carbon Nanotube Growth Kinetics in a Rapid Thermal Chemical Vapor Deposition Reactor With Multizone Infrared Heating
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Topics: Carbon nanotubes, Chemical vapor deposition, Heating, Catalysts, Image processing, Rapid thermal processing
Proceedings Papers

Multizone Rapid Thermal Processing to Overcome Challenges in Carbon Nanotube Manufacturing by Chemical Vapor Deposition

Jaegeun Lee, Moataz Abdulhafez, Mostafa Bedewy
Proc. ASME. MSEC2019, Volume 2: Processes; Materials, V002T04A007, June 10–14, 2019
Publisher: American Society of Mechanical Engineers
Paper No: MSEC2019-2847
https://doi.org/10.1115/MSEC2019-2847
View Paper titled, Multizone Rapid Thermal Processing to Overcome Challenges in Carbon Nanotube Manufacturing by Chemical Vapor Deposition
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Topics: Carbon nanotubes, Chemical vapor deposition, Manufacturing, Rapid thermal processing, Catalysts, Cycles, Dynamics (Mechanics), Oxygen, Particulate matter, Pressure
Proceedings Papers

Microwave-Assisted Processing of Regenerated Silk Fibroin Films

Moataz Abdulhafez, Se Youn Cho, Golnaz Tomaraei, Mostafa Bedewy
Proc. ASME. MSEC2019, Volume 2: Processes; Materials, V002T04A008, June 10–14, 2019
Publisher: American Society of Mechanical Engineers
Paper No: MSEC2019-2932
https://doi.org/10.1115/MSEC2019-2932
View Paper titled, Microwave-Assisted Processing of Regenerated Silk Fibroin Films
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Topics: Microwaves, Irradiation (Radiation exposure), Transparency, Biocompatibility, Biodegradation, Casting, Electronics, Food products, Fourier transform infrared spectroscopy, Fourier transforms
Journal Articles

Multizone Rapid Thermal Processing to Overcome Challenges in Carbon Nanotube Manufacturing by Chemical Vapor Deposition

Jaegeun Lee, Moataz Abdulhafez, Mostafa Bedewy
Journal: Journal of Manufacturing Science and Engineering
Publisher: ASME
Article Type: Research-Article
J. Manuf. Sci. Eng. September 2019, 141(9): 091006.
Paper No: MANU-19-1275
https://doi.org/10.1115/1.4044104
Published Online: July 22, 2019
View Article titled, Multizone Rapid Thermal Processing to Overcome Challenges in Carbon Nanotube Manufacturing by Chemical Vapor Deposition
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Topics: Carbon nanotubes, Catalysts, Manufacturing, Chemical vapor deposition, Rapid thermal processing
Proceedings Papers

Biomechanical Root Cause Analysis of Complications in Head Immobilization Devices for Pediatric Neurosurgery

Moataz Abdulhafez, Karim Kadry, Mohamed Zaazoue, Liliana C. Goumnerova, Mostafa Bedewy
Proc. ASME. MSEC2018, Volume 1: Additive Manufacturing; Bio and Sustainable Manufacturing, V001T05A007, June 18–22, 2018
Publisher: American Society of Mechanical Engineers
Paper No: MSEC2018-6632
https://doi.org/10.1115/MSEC2018-6632
View Paper titled, Biomechanical Root Cause Analysis of Complications in Head Immobilization Devices for Pediatric Neurosurgery
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Topics: Biomechanics, Neurosurgery, Pediatrics, Root cause analysis, Brain, Finite element model, Bone, Design, Disks, Instrumentation