Katerina Anagnostou

• Ph.D. Candidate
• Ph.D. Candidate / Researcher at Hellenic Mediterranean University (HMU)

Although graphene's superior electrical, optoelectronic, thermal, and mechanical properties have been evident for 20 years now, its poor water dispersibility has hindered its incorporation in many types of applications and technologies. Strong examples of this are biomedical and environmental applications and devices that require non‐toxic, biocomp...

In this study, we explored the potential of exfoliated transition metal dichalcogenides (TMDs) as innovative spray-coated hole transport layers (HTLs) in organic photovoltaics (OPVs), addressing the need for efficient and stable materials in solar cell technology. This research was motivated by the need for alternative HTLs that can offer enhanced...

Graphene is a two-dimensional carbon-based nanomaterial that displays exceptionally high electrical and thermal conductivity, enhanced tensile strength, as well as high flexibility, and transparency, making it a material suitable for electronics, energy devices, and biomedical applications. However, the intrinsic hydrophobicity of graphene has long...

Smart generators that convert untapped ambient energy into electrical power are an innovative approach toward developing wearable, self-powering technologies, such as sensors and IoT devices, that do not require batteries, and therefore reduce the inevitable battery waste. Clean energy can be generated through the spontaneous absorption and evapora...

In this work, we formulate water-based graphene oxide (GO) inks to fabricate moisture energy generators (MEGs) while a two-fold geometric tuning is proposed to encourage enhanced performance. Two GO-based structures with distinctly different thicknesses were prepared as the moisture absorbing layer: a GO-pellet (GOP) and a thinner GO-film (GOF). Th...

The formation of highly concentrated and stable graphene derivatives dispersions remains a challenge towards their exploitation in various applications, including flexible optoelectronics, photovoltaics, 3D-printing, and biomedicine. Here, we demonstrate our extensive investigation on the dispersibility of graphene oxide (GO) and reduced graphene o...

A novel solution-processed, graphene-based material was synthesized by treating graphene oxide (GO) with 2,5,7-trinitro-9-oxo-fluorenone-4-carboxylic acid (TNF-COOH) moieties, via simple synthetic routes. The yielded molecule N-[(carbamoyl-GO)ethyl]-N’-[(carbamoyl)-(2,5,7-trinitro-9-oxo-fluorene)] (GO-TNF) was thoroughly characterized and it was sh...

Biodegradable polymeric nanoparticles (NPs) are safe, biocompatible nanosystems with tunable properties and controllable activity. These properties make them suitable candidates for a wide range of applications in the medical field, including drug delivery systems (DDS). Many different polymers, of natural and synthetic origin, are used for the for...

A novel solution-processed graphene-based material was synthesized by treating graphene oxide (GO) with 2,5,7-trinitro-9-oxo-fluorenone-4-carboxylic acid (TNF-COOH) moieties, via simple synthetic routes. The yielded molecule N-[(carbamoyl-GO)ethyl]-N’-[(carbamoyl)-(2,5,7-trinitro-9-oxo-fluorene)] (GO-TNF) was thoroughly characterized and it was sho...

This laboratory experiment is designed to train undergraduate students in the fundamental steps followed in engineering solution-processed organic solar cells and to offer insight on the operating principles of said device. Bulk heterojunction (BHJ) organic solar cells represent a photovoltaic architecture which has attracted a lot of attention due...

Green Synthesis of reduced Graphene Oxide for biocompatible applications

Abstract: Bulk heterojunction (BHJ) organic solar cells represent a photovoltaic architecture of high interest due to its promising properties and low cost.1,2,3Owing to its potential it is continuously being further investigated and improved. An organic solar cell is fabricated by depositing each integral material onto a glass substrate. The oper...