Mohammad Hossein Sayad

ORCID: 0000-0001-8966-816X
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About
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Research Areas
  • Advanced Sensor and Energy Harvesting Materials
  • Dielectric materials and actuators
  • Ferroelectric and Piezoelectric Materials
  • Tactile and Sensory Interactions
  • Heavy metals in environment
  • Cardiovascular and Diving-Related Complications
  • Air Quality and Health Impacts
  • Ionic liquids properties and applications
  • Noise Effects and Management
  • Non-Invasive Vital Sign Monitoring

Sharif University of Technology
2020-2022

Abstract Increasing demand for wearable devices has resulted in the development of soft sensors; however, an excellent sensor measuring stretch, twist, and pressure simultaneously not been proposed yet. This paper presents a novel, fully 3D, microfluidic-oriented, gel-based, highly stretchable resistive sensor. The is multi-functional could be used to measure pressure, which potential using 3D structure Unlike previous methods, almost all them EGaIn as conductive material, this case, we...

10.1038/s41598-022-25048-x article EN cc-by Scientific Reports 2022-11-28

One of the most critical disadvantages Ionic Polymer Metal Composites (IPMCs) is their Back Relaxation (BR) effect. The BR an unwanted and slow counter-bending IPMCs that shows itself in opposite direction desired bending. Some techniques based on using closed-loop control have been proposed for eliminating However, those are valid only small deformation IPMC, also they use approaches. While practical applications, IPMC should be large, we cannot system. To address these problems, a...

10.1109/icbme51989.2020.9319432 article EN 2020-11-26

Abstract This study investigates the concentrations and spatial distribution of toxic heavy metals (Cd, Cu, Pb Zn) through chemical analysis rainwater samples, characterized by different land use, emission sources, traffic conditions population density. The average at five sites were 52.9, 11.8, 14.6 0.93 µg l − 1 for Zn, Pb, Cu Cd, respectively. all significantly higher ( p < 0.05) central south Tehran areas compared to west north, due urban characteristics, pollution rates from domestic...

10.21203/rs.3.rs-3151115/v1 preprint EN cc-by Research Square (Research Square) 2023-07-28

Besides the advantages of Ionic polymer-metal composites (IPMCs) for biomedical applications, there are some drawbacks in their performance, which can be enhanced. One those critical is "back relaxation" (BR). If we apply a step voltage to IPMC, it will bend anode direction. Afterward, an unwanted and relatively slow counter-bending toward cathode side. There disadvantages current BR control methods IPMC actuators that prevent them from being used real applications. This paper presents new...

10.2139/ssrn.4042592 article EN SSRN Electronic Journal 2022-01-01

In this paper, a novel fully 3D, microfluidic-oriented, gel-based, and low-cost highly stretchable resistive sensors have been presented. By the proposed method we are able to measure discriminate all of stretch, twist, pressure features by single sensor which is potential that obtained from 3D structure our sensor. Against previous used EGaIn as conductive material their sensor, low-cost, safe, ubiquitous glycol-based gel instead. To show functionality some FEM simulations, set designed...

10.48550/arxiv.2106.06975 preprint EN other-oa arXiv (Cornell University) 2021-01-01

Besides the advantages of Ionic polymer-metal composites (IPMCs) for biomedical applications, there are some drawbacks in their performance, which can be enhanced. One those critical is "back relaxation" (BR). If we apply a step voltage to IPMC, it will bend anode direction. Afterward, an unwanted and relatively slow counter-bending toward cathode side. There disadvantages current BR control methods IPMC actuators that prevent them from being used real applications. This paper presents new...

10.48550/arxiv.2106.13040 preprint EN other-oa arXiv (Cornell University) 2021-01-01
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