Amir Nemati Hayati
Current Organizations / Institutes
The organizations/institutes from the scholar's latest article
Previous Organizations / Institutes
The organizations / institutes from the scholar's other articles in the past ten years
Research Subjects
Research Interests
Amir Nemati Hayati has a total of 13 co-authors. Here are the top co-authors by number of shared publications:
- Hamid Reza Rezaie
School of Metallurgical and Materials Engineering, Iran University of Science & Technology (IUST), Tehran, Iran
3 shared publications S.M. Hosseinalipour
3 shared publicationsA.M. Nabizade-Haghighi
1 shared publication- Amir Ershad-Langroudi
Color and Surface Coatings Group, Polymer Processing Department, Iran Polymer and Petrochemical Institute (IPPI), Tehran, Iran
1 shared publication - Bronwyn Laycock
School of Chemical Engineering The University of Queensland Brisbane Queensland Australia
1 shared publication - Darren James Martin
ARC Centre of Excellence for Green Electrochemical Transformation of Carbon Dioxide, The University of Queensland; Brisbane, QLD 4072, Australia
1 shared publication
Latest Publications
- 23 February 2022
- Published by Springer Nature in Silicon
- Vol. 14 (16) , 10257-10261
VLS Synthesis of Silicon Nanowires Array for Photovoltaic Devices
- 23 February 2022
- Published by Springer Nature in Silicon
- Vol. 14 (16) , 10257-10261
VLS Synthesis of Silicon Nanowires Array for Photovoltaic Devices
- 15 May 2019
- Published by University of Queensland Library
Sustainable and high performance rigid polyurethane foams based on lignin
The University of Queensland's institutional repository, UQ eSpace, aims to create global visibility and accessibility of UQ’s scholarly research.
- 15 May 2019
- Published by University of Queensland Library
Sustainable and high performance rigid polyurethane foams based on lignin
The University of Queensland's institutional repository, UQ eSpace, aims to create global visibility and accessibility of UQ’s scholarly research.
- 1 July 2018
- Published by Elsevier in Industrial Crops and Products
- Vol. 117, 149-158
A simple methodology for improving the performance and sustainability of rigid polyurethane foam by incorporating industrial lignin
- 1 July 2018
- Published by Elsevier in Industrial Crops and Products
- Vol. 117, 149-158
A simple methodology for improving the performance and sustainability of rigid polyurethane foam by incorporating industrial lignin
- 1 February 2011
- Published by Elsevier in Materials Letters
- Vol. 65 (4) , 736-739
Preparation of poly(3-hydroxybutyrate)/nano-hydroxyapatite composite scaffolds for bone tissue engineering
- 1 February 2011
- Published by Elsevier in Materials Letters
- Vol. 65 (4) , 736-739
Preparation of poly(3-hydroxybutyrate)/nano-hydroxyapatite composite scaffolds for bone tissue engineering
- 1 April 2010
- Published by Elsevier in Progress in Organic Coatings
- Vol. 67 (4) , 371-374
Characterization of sol–gel coated 316L stainless steel for biomedical applications
- 1 April 2010
- Published by Elsevier in Progress in Organic Coatings
- Vol. 67 (4) , 371-374
Characterization of sol–gel coated 316L stainless steel for biomedical applications
- 1 February 2010
- Published by Wiley in Journal of Prosthodontics
- Vol. 19 (2) , 112-117
Investigation of Mechanical Properties of Experimental Bis-GMA/TEGDMA Dental Composite Resins Containing Various Mass Fractions of Silica Nanoparticles
Mechanical properties of dental composite resins need to be improved in order to enhance their performance for applications in direct restorations. Application of nanoparticles in this field is a recent development. The aim of this study was to investigate the mechanical properties of experimental composites containing various mass fractions of silica nanoparticles. Experimental composites were composed of a visible-light-curing monomer mixture (70 wt% Bis-GMA and 30 wt% TEGDMA) and silica nanoparticles of a size ranging from 20 nm to 50 nm modified with gamma-methacryloxy propyl trimethoxy silane (gamma-MPS) as reinforcing filler. The composites were classified into four groups according to their filler mass fractions ranging from 20% to 50%. Following the same preparation procedure, a conventional composite was also fabricated consisting of a mass percentage of 60% silica fillers having particle sizes ranging from 10 microm to 40 microm in the same organic matrix, which served as control. Ten specimens were prepared of each experimental group and also of the control. Fracture toughness was measured using single-edge notched bend (SENB) specimens. Specimen fracture surfaces were mounted on aluminum stubs with carbon cement, sputter-coated with gold and examined under scanning electron microscopy (SEM). Flexural strength was evaluated through a standard three-point bending test and Vickers microhardness test was performed to investigate the hardness of the samples. Filler mass fraction had a significant effect on composite properties. Fracture toughness, flexural strength, and hardness of composites at filler mass fraction of 40% of silica nanoparticles were (mean +/- SD) 1.43 +/- 0.08 MPa.m(1/2), 149.74 +/- 8.14 MPa, and 62.12 +/- 3.07 VHN, respectively; relevant values for composites at 50% mass fraction of silica nanoparticles were 1.38 +/- 0.07 MPa.m(1/2), 122.83 +/- 6.13 MPa, and 70.69 +/- 3.67 VHN, respectively, all of which were significantly higher than 1.07 +/- 0.06 MPa.m(1/2), 104.61 +/- 8.73 MPa, and 52.14 +/- 4.02 VHN of the control, respectively (Tukey's multiple comparison test; family confidence coefficient = 0.95). Measured values for composites at 20% mass fraction of silica nanoparticles were 0.94 +/- 0.06 MPa.m(1/2), 103.41 +/- 7.62 MPa, and 42.87 +/- 2.61 VHN, respectively; relevant values for composites at 30% mass fraction of silica nanoparticles were 1.16 +/- 0.07 MPa.m(1/2), 127.91 +/- 7.05 MPa, and 51.78 +/- 3.41 VHN, respectively. Reinforcement of dental composite resins with silica nanoparticles resulted in a significant increase in the evaluated mechanical properties in comparison with the conventional composite. The filler mass fraction played a critical role in determining the composite's mechanical properties.
- 1 February 2010
- Published by Wiley in Journal of Prosthodontics
- Vol. 19 (2) , 112-117
Investigation of Mechanical Properties of Experimental Bis-GMA/TEGDMA Dental Composite Resins Containing Various Mass Fractions of Silica Nanoparticles
Mechanical properties of dental composite resins need to be improved in order to enhance their performance for applications in direct restorations. Application of nanoparticles in this field is a recent development. The aim of this study was to investigate the mechanical properties of experimental composites containing various mass fractions of silica nanoparticles. Experimental composites were composed of a visible-light-curing monomer mixture (70 wt% Bis-GMA and 30 wt% TEGDMA) and silica nanoparticles of a size ranging from 20 nm to 50 nm modified with gamma-methacryloxy propyl trimethoxy silane (gamma-MPS) as reinforcing filler. The composites were classified into four groups according to their filler mass fractions ranging from 20% to 50%. Following the same preparation procedure, a conventional composite was also fabricated consisting of a mass percentage of 60% silica fillers having particle sizes ranging from 10 microm to 40 microm in the same organic matrix, which served as control. Ten specimens were prepared of each experimental group and also of the control. Fracture toughness was measured using single-edge notched bend (SENB) specimens. Specimen fracture surfaces were mounted on aluminum stubs with carbon cement, sputter-coated with gold and examined under scanning electron microscopy (SEM). Flexural strength was evaluated through a standard three-point bending test and Vickers microhardness test was performed to investigate the hardness of the samples. Filler mass fraction had a significant effect on composite properties. Fracture toughness, flexural strength, and hardness of composites at filler mass fraction of 40% of silica nanoparticles were (mean +/- SD) 1.43 +/- 0.08 MPa.m(1/2), 149.74 +/- 8.14 MPa, and 62.12 +/- 3.07 VHN, respectively; relevant values for composites at 50% mass fraction of silica nanoparticles were 1.38 +/- 0.07 MPa.m(1/2), 122.83 +/- 6.13 MPa, and 70.69 +/- 3.67 VHN, respectively, all of which were significantly higher than 1.07 +/- 0.06 MPa.m(1/2), 104.61 +/- 8.73 MPa, and 52.14 +/- 4.02 VHN of the control, respectively (Tukey's multiple comparison test; family confidence coefficient = 0.95). Measured values for composites at 20% mass fraction of silica nanoparticles were 0.94 +/- 0.06 MPa.m(1/2), 103.41 +/- 7.62 MPa, and 42.87 +/- 2.61 VHN, respectively; relevant values for composites at 30% mass fraction of silica nanoparticles were 1.16 +/- 0.07 MPa.m(1/2), 127.91 +/- 7.05 MPa, and 51.78 +/- 3.41 VHN, respectively. Reinforcement of dental composite resins with silica nanoparticles resulted in a significant increase in the evaluated mechanical properties in comparison with the conventional composite. The filler mass fraction played a critical role in determining the composite's mechanical properties.