Dr. Sadegh Mehdi Aghaei Profile

Dr. Sadegh Mehdi Aghaei

at Worcester Polytechnic Institute

SPIE Involvement:

Author

Publications (3)

Proceedings Article | 22 March 2021 Paper

Phosphorene-based nanosensor for lung cancer detection

Aref Aasi, Sadegh Mehdi Aghaei, Saman Farhangdoust, Armin Mehrabi, Balaji Panchapakesan

Proceedings Volume 11590, 1159009 (2021) https://doi.org/10.1117/12.2583348

KEYWORDS: Finite element methods, Metamaterials, Surface roughness, Polymers, Polymer thin films, Metals, Interfaces

Read Abstract +

Proceedings Article | 23 April 2020 Paper

Auxetic MEMS sensor

Saman Farhangdoust, Sadegh Mehdi Aghaei, Maryam Amirahmadi, Nezih Pala, Armin Mehrabi

Proceedings Volume 11379, 113790Z (2020) https://doi.org/10.1117/12.2559330

KEYWORDS: Sensors, Microelectromechanical systems, Ferroelectric materials, Finite element methods, Heart, Metamaterials, Biomedical optics, Blood pressure, Medicine, Ferroelectric polymers, Sensor metamaterials, Nonlinear metamaterials

Read Abstract +

Proceedings Article | 10 September 2019 Presentation

Flexible piezoelectric nanogenerator based on sonochemically synthesized ZnO nanoflakes for self‐powered devices and wearable energy harvesting (Conference Presentation)

Fahmida Alam, Sadegh Mehdi Aghaei, Ahmed Hasnain Jalal, Nezih Pala

Proceedings Volume 11089, 1108914 (2019) https://doi.org/10.1117/12.2531751

KEYWORDS: Zinc oxide, Energy harvesting, Thin films, Semiconductors, Positron emission tomography, Electronic components, Thermoelectric materials, Crystals, Nanolithography

Read Abstract +

Ambient energy harvesting is a promising route to achieve self-powered electronic devices. A nanogenerator scavenges mechanical energy from surrounding and converts it into electrical energy to supply power to a self-powered system. Using piezoelectric, thermoelectric, and triboelectric effects, several nanogenerators have been developed. Piezoelectric nanogenerators harvest kinetic energy to provide power for portable and small electronics. The kinetic energy generated from human body motions is an excellent energy source to power wearable devices. Biocompatibility, flexibility, high efficiency, and small volume are the main attributes for applications related to the human body. Piezoelectric nanogenerators based on thin films are desirable for their ability to scavenge irregular mechanical energies from bending. The power generation mechanism of a thin film based piezoelectric nanogenerator is determined by the coupled piezoelectric and semiconducting properties of the thin film. ZnO is an appealing material for piezoelectric nanogenerators thanks to its coupling effect of semiconducting and piezoelectrical properties, extremely high elasticity, high power density, low-cost and controlled growth, and biocompatibility. Herein, a flexible piezoelectric nanogenerator with ZnO nanoflakes-polyethylene terephthalate (PET) is reported. The direct synthesis of ZnO nanoflakes on flexible PET substrate was achieved via a simple, fast, low-temperature, low-cost, highly stable, and reproducible sonochemical method. The synthesized ZnO thin films were characterized in detail. The results show that ZnO nanoflakes were grown with high purity and highly crystallinity along [0001] direction. Our piezoelectric device generated a peak voltage of 62 mV with great reproducibility (p-value of 0.0212). The fabrication of ZnO nanoflakes-PET piezoelectric nanogenerators helps us to develop more flexible and bio-compatible nanogenerators particularly self-powered wearable electronics.

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Keywords/Phrases

Search In:

Publication Years