Alkmini D. Nega

ORCID: 0000-0002-3823-5476
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About
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Research Areas
  • Conducting polymers and applications
  • Organic Electronics and Photovoltaics
  • Luminescence and Fluorescent Materials
  • Perovskite Materials and Applications
  • Fuel Cells and Related Materials
  • Advanced Battery Materials and Technologies
  • Nanoplatforms for cancer theranostics
  • Advancements in Battery Materials
  • Nanopore and Nanochannel Transport Studies
  • Anodic Oxide Films and Nanostructures
  • Fullerene Chemistry and Applications
  • Analytical Chemistry and Sensors
  • Advanced biosensing and bioanalysis techniques
  • Advanced battery technologies research
  • Organic Light-Emitting Diodes Research
  • Carbon Nanotubes in Composites
  • Polyoxometalates: Synthesis and Applications
  • Gas Sensing Nanomaterials and Sensors
  • Block Copolymer Self-Assembly

National Hellenic Research Foundation
2019-2025

German Cancer Research Center
2020-2025

Heidelberg University
2020-2025

National and Kapodistrian University of Athens
2016-2024

Heidelberg University
2021

Heidelberg (Poland)
2020

Abstract Recent efforts in the field of organic photodetectors (OPD) have been focused on extending broadband detection into near‐infrared (NIR) region. Here, two blends an ultralow bandgap push–pull polymer TQ‐T combined with state‐of‐the‐art non‐fullerene acceptors, IEICO‐4F and Y6, are compared to obtain OPDs for sensing NIR beyond 1100 nm, which is cut off benchmark Si photodiodes. It observed that TQ‐T:IEICO‐4F device has a superior IR responsivity (0.03 AW ‐1 at 1200 nm −2 V bias) can...

10.1002/smll.202200580 article EN cc-by Small 2022-03-04

One of the key challenges facing organic photodiodes (OPDs) is increasing detection into infrared region. Organic semiconductor polymers provide a platform for tuning bandgap and optoelectronic response to go beyond traditional 1000-nanometer benchmark. In this work, we present near-infrared (NIR) polymer with absorption up 1500 nanometers. The polymer-based OPD delivers high specific detectivity D* 1.03 × 1010 Jones (-2 volts) at 1200 nanometers dark current Jd just 2.3 10-6 ampere per...

10.1126/sciadv.adh2694 article EN cc-by-nc Science Advances 2023-06-07

The primary challenge regarding solid polymer electrolytes (SPEs) is the development of materials with enhanced mechanical modulus without sacrificing ionic conductivity. Here, we demonstrate that when stiff/rigid nanoparticles are thermodynamically miscible a utilized in blend liquid electrolyte, elastic and conductivity resulting SPEs increase compared to linear analogues. In particular, poly(methyl methacrylate), PMMA, nanoparticles, composed high functionality star-shaped were added low...

10.1021/acs.macromol.7b02394 article EN Macromolecules 2018-03-20

Herein, we report a detailed study on the optoelectronic properties, photovoltaic performance, structural conformation, morphology variation, charge carrier mobility, and recombination dynamics in bulk heterojunction solar cells comprising series of donor-acceptor conjugated polymers as electron donors based benzodithiophene (BDT) 5,8-bis(5-bromothiophen-2-yl)-6,7-difluoro-2,3-bis(3-(octyloxy)phenyl)quinoxaline function BDT's thienyl substitution (alkyl (WF3), alkylthio (WF3S), fluoro...

10.1021/acsami.9b12018 article EN ACS Applied Materials & Interfaces 2019-09-16

For the next generation of safe and high energy rechargeable lithium metal batteries, we introduce nanostructured polymer particles asymmetric miktoarm star copolymers as additives to liquid electrolytes for use solid (SPE). The mechanical properties resulting SPEs are dramatically improved compared pure electrolyte (the elastic modulus increased by up 8 orders magnitude), while ionic conductivity was maintained close that electrolyte. In particular, addition 44 wt % stars, composed ion...

10.1021/acs.macromol.7b00789 article EN Macromolecules 2017-06-15

Abstract Novel amphiphilic π ‐conjugated polymer nanoparticles tailored to efficiently absorb in the near‐infrared II (NIR‐II) region of electromagnetic spectrum (>1000 nm) are presented. To achieve this, it is statistically introduced triethylene glycol substituted bithiophene moieties various contents into a backbone consisting alternating thiophene and [1,2,5]thiadiazolo[3,4‐g]quinoxaline. Through systematic modifications monomer ratios, four conjugated polymers produced. The presence...

10.1002/marc.202400739 article EN Macromolecular Rapid Communications 2025-01-30

The development of new aqueous conjugated polymer nanoparticles with high photoluminescence quantum yields (PLQYs) at the far red and near infrared (NIR) spectral regions (>650 nm) as alternative probes for fluorescence imaging is reported.

10.1039/d0qm00195c article EN cc-by-nc Materials Chemistry Frontiers 2020-01-01

We report the imbibition and adsorption kinetics of a series symmetric linear/star cis-1,4-polyisoprene blends within long channels self-ordered nanoporous anodic aluminum oxide (abbreviated: AAO). Using in situ nanodielectric spectroscopy, we followed evolution longest chain modes with judicious selection molar masses for constituent components. demonstrated differences linear star components based on relative viscosities (e.g., polymers lower zero-shear viscosity penetrated first...

10.1063/5.0189661 article EN The Journal of Chemical Physics 2024-01-28

Aqueous conjugated polymer nanoparticles developed by nanoprecipitation from a quinoxaline–thiophene type with 3 fluorine atoms as potential cancer theranostics for breast cancer.

10.1039/d1qm00479d article EN cc-by Materials Chemistry Frontiers 2021-01-01

The lifetime of inverted PSCs is extended by employing for the first time hydrophobic conjugated polymer PIDTTDQ. optimized PIDTTDQ device shows an increased PCE due to improved HTL/Perovskite interface while having enhanced moisture, light and thermal stability.

10.1039/d2ya00067a article EN cc-by-nc Energy Advances 2022-01-01

A new organic material with three 4,4-difluoro-4-borata-3a-azonia-4a-aza-s-indacene dyes (BODIPYs) at the periphery of central core is successfully synthesized (3BDP3T) and its corresponding aqueous nanoparticles are prepared via encapsulation approach characterized in detail both experimentally theoretically aid Density Functional Theory (DFT). The linear non-linear optical properties also studied. Until now, development materials BODIPYs as substituents limited their not fully resolved....

10.3390/electronicmat2010003 article EN cc-by Electronic Materials 2021-01-18
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