Zeinab Eftekhari

ORCID: 0000-0002-2669-5600
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About
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Research Areas
  • Advanced MEMS and NEMS Technologies
  • Photonic and Optical Devices
  • Plasmonic and Surface Plasmon Research
  • Mechanical and Optical Resonators
  • Force Microscopy Techniques and Applications
  • Fibromyalgia and Chronic Fatigue Syndrome Research
  • Solid-state spectroscopy and crystallography
  • Long-Term Effects of COVID-19
  • Advanced Sensor and Energy Harvesting Materials
  • Graphene research and applications
  • Advanced Fiber Laser Technologies
  • Semiconductor Lasers and Optical Devices
  • Gold and Silver Nanoparticles Synthesis and Applications
  • Near-Field Optical Microscopy
  • Chalcogenide Semiconductor Thin Films
  • Innovative Energy Harvesting Technologies
  • Tryptophan and brain disorders
  • Carbon Nanotubes in Composites
  • Perovskite Materials and Applications
  • Advanced biosensing and bioanalysis techniques
  • Diamond and Carbon-based Materials Research

University of Twente
2022-2025

The University of Queensland
2024

ARC Centre of Excellence in Advanced Molecular Imaging
2024

Bilkent University
2020-2021

PurposeLong COVID and Myalgic Encephalomyelitis/Chronic Fatigue Syndrome (ME/CFS) patients experience multiple complex symptoms, potentially linked to imbalances in brain neurochemicals. This study aims measure neurochemical levels long ME/CFS as well healthy controls investigate associations with severity measures.MethodsMagnetic resonance spectroscopy (MRS) data was acquired a 3T Prisma MRI scanner. We measured absolute of neurochemicals the posterior cingulate cortex (n=17), (n=10) using...

10.1016/j.amjmed.2024.04.007 article EN cc-by The American Journal of Medicine 2024-04-01

Abstract Cesium‐formamidinium lead iodide (Cs x FA 1‐x PbI 3 ) perovskites are a promising methylammonium‐free alternative for efficient single‐junction solar cells. However, they have not been fully explored by vapor‐phase deposition techniques. Herein, template‐assisted approach is demonstrated the growth of Cs perovskite films using pulsed laser (PLD) from single‐source target mixed precursors. Implementing (PbI 2 + tailored template, phase‐pure with uniform coverage on both planar and...

10.1002/aenm.202406033 article EN cc-by Advanced Energy Materials 2025-02-25

In this Letter, we demonstrate strong light emission from defective hexagonal boron nitride (hBN) defect centers upon their coupling with disorder near-touching plasmonic units. Based on numerical simulations and characterization results, the design at thin layer thicknesses of 20 nm can provide above 2 orders magnitude enhancement in photoluminescence (PL) spectra. Moreover, platform shortens luminescence lifetime emitters. The proposed be easily extended to other plasmonic-emitter...

10.1364/ol.415475 article EN Optics Letters 2021-02-16

We are presenting a numerical approach to calculate the mechanical efficiency of piezo-photomotion devices, which consist piezoelectric actuators, integrated with silicon solar cells. Such devices provide conversion optical energy and pave way for remote-controlled micro nanorobots. demonstrate that is almost independent input voltage can reach 0.06% under simple point force load, when backside etching substrate, i.e. diaphragm 8 mm in diameter 30 μm thickness. This study offers guidelines...

10.1016/j.sna.2023.114690 article EN cc-by Sensors and Actuators A Physical 2023-09-26

In this work, a silicon photodiode integrated with piezoelectric membrane is studied by Kelvin probe force microscopy (KPFM) under modulated illumination. Time-dependent KPFM enables simultaneous quantification of the surface photovoltage generated as well resulting mechanical oscillation vertical atomic resolution in real-time. This technique offers opportunity to measure concurrently optoelectronic and response device at nanoscale. Furthermore, time-dependent (AFM) was employed spatially...

10.3762/bjnano.14.87 article EN cc-by Beilstein Journal of Nanotechnology 2023-11-06

The colorimetric detection of bio-agent targets has attracted considerable attention in nanosensor designs. This platform provides an easy to use, real-time, and rapid sensing approach, as the color change can be easily distinguished by naked eye. In this Letter, we propose a large scale compatible fabrication route realize optical nanosensors with novel configuration. For purpose, design fabricate tightly packed disordered arrangement Fabry–Perot based metal–insulator–metal nanoantennas...

10.1364/ol.410213 article EN Optics Letters 2020-11-11

We are presenting a numerical approach to calculate the mechanical efficiency of piezo-photomotion devices, which consist piezoelectric actuators, integrated with silicon solar cells. Such devices provide direct conversion optical energy and pave way for remote-controlled micro nanorobots. demonstrate that is almost independent input voltage can reach 0.06% under simple point force load, when backside etching substrate, i.e. diaphragm 8 mm in diameter 30 μm thickness. This study offers...

10.2139/ssrn.4369501 article EN 2023-01-01

We study hybrid materials systems comprised of a silicon photodiode integrated with piezoelectric material which show mechanical vibration upon alternating illumination. Here, we present time-dependent and spatially resolved measurements the light-induced oscillation.

10.1364/noma.2022.notu4c.4 article EN Optica Advanced Photonics Congress 2022 2022-01-01
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