A5084438083- 2D Materials and Applications
- Graphene research and applications
- Perovskite Materials and Applications
- MXene and MAX Phase Materials
- Advanced Photocatalysis Techniques
- Carbon and Quantum Dots Applications
- Conducting polymers and applications
- Axial and Atropisomeric Chirality Synthesis
- Asymmetric Synthesis and Catalysis
- Graphene and Nanomaterials Applications
- Fullerene Chemistry and Applications
- Chalcogenide Semiconductor Thin Films
- Crystallization and Solubility Studies
- Synthesis and Catalytic Reactions
- Porphyrin and Phthalocyanine Chemistry
- Crystallography and molecular interactions
- X-ray Diffraction in Crystallography
- Luminescence and Fluorescent Materials
- Advanced Chemical Physics Studies
- Gas Sensing Nanomaterials and Sensors
- Nanoplatforms for cancer theranostics
- Nanocluster Synthesis and Applications
- Carbon Nanotubes in Composites
- Electrocatalysts for Energy Conversion
- Advanced biosensing and bioanalysis techniques
National Hellenic Research Foundation
2017-2025
Nagoya University
2020-2025
Osaka University
2024-2025
National Institute of Advanced Industrial Science and Technology
2020
Athens State University
2020
Universitat de València
2015
Rede de Química e Tecnologia
2015
Centro Médico Sanitas Valencia
2015
The emission of a bright blue fluorescence is unique feature common to the vast variety polymer carbon dots (CDs) prepared from carboxylic acid and amine precursors. However, difficulty assign precise chemical structure this class CDs yet hampers comprehension their underlying luminescence principle. In work, we show that highly fluorescent model types can be citric ethylenediamine through low temperature synthesis routes. Facilitating controlled polycondensation processes, reveal sizes...
N-methyl-2-pyrrolidone (NMP) has been shown to be the most effective solvent for liquid phase exfoliation and dispersion of a range 2D materials including graphene, molybdenum disulphide (MoS2) black phosphorus. However, NMP is also known susceptible sonochemical degradation during exfoliation. We report that this gives rise strong visible photoluminescence NMP. Sonochemical modification influence layered in optical absorbance dispersion. The emerging properties degraded present challenges...
Abstract A quinine‐derived thiourea organocatalyst promoted the highly enantioselective addition of naphthols and activated phenols to ketimines derived from isatins. The reaction afforded chiral 3‐amino‐2‐oxindoles with a quaternary stereocenter in high yields (up 99 %) excellent enantioselectivity % ee ). To best our knowledge, this transformation is first ketimines.
Abstract The covalent functionalization of exfoliated semiconducting MoS 2 by 1,2-dithiolanes bearing an ethylene glycol alkyl chain terminated to a butoxycarbonyl-protected amine and photoactive pyrene moiety is accomplished. -based nanohybrids were fully characterized complementary spectroscopic, thermal, microscopy techniques. Markedly, density functional theoretical studies combined with X-ray photoelectron spectroscopy analysis demonstrate preferential edge functionalization, primarily...
Abstract The functionalization of MoS 2 is paramount importance for tailoring its properties towards optoelectronic applications and unlocking full potential. Zinc phthalocyanine (ZnPc) carrying an 1,2‐dithiolane oxide linker was used to functionalize at defect sites located the edges. structure ZnPc‐MoS fully assessed by complementary spectroscopic, thermal, microscopy imaging techniques. An energy‐level diagram visualizing different photochemical events in established revealed a...
Exfoliated semiconducting MoS2 and WS2 were covalently functionalized with 1,2-dithiolane-modified carbon nanodots (CNDs). The newly synthesized CND-MoS2 CND-WS2 hybrids characterized by spectroscopic, thermal, electron microscopy imaging methods. Based on electronic absorption fluorescence emission spectroscopy, modulation of the optoelectronic properties TMDs interfacing CNDs was accomplished. Electrochemical studies revealed facile oxidation over in examined hybrids, suggesting it to be...
Although the synthesis of monolayer transition metal dichalcogenides has been established in last decade, synthesizing nanoribbons remains challenging. In this study, we have developed a straightforward method to obtain with controllable widths (25-8000 nm) and lengths (1-50 μm) by O2 etching metallic phase metallic/semiconducting in-plane heterostructures MoS2. We also successfully applied process for WS2, MoSe2, WSe2 nanoribbons. Furthermore, field-effect transistors show an on/off ratio...
Molybdenum disulfide nanosheets covalently modified with porphyrin were prepared and fully characterized. Neither the absorption nor its fluorescence was notably affected by covalent linkage to MoS2 . The use of transient spectroscopy showed that a complex ping-pong energy-transfer mechanism, namely from back porphyrin, operated. This study reveals potential transition-metal dichalcogenides in photosensitization processes.
An organocatalytic enantioselective aza-Friedel–Crafts addition of 2-naphthols to benzoxathiazine 2,2-dioxides is described using a quinine-derived bifunctional catalyst.
Ammonium-modified MoS2 and WS2 were prepared characterized by complementary spectroscopic, thermal, microscopic means. The positive charges on functionalized WS2, due to the presence of ammonium units, exploited electrostatically bring in contact an anionic porphyrin bearing a carboxylate moiety, yielding porphyrin/MoS2 porphyrin/WS2 ensembles, 5a 5b, respectively. Efficient photoluminescence quenching porphyrin's emission within nanoensembles combination with time-resolved assays, revealed...
Abstract A quinine‐derived thiourea organocatalyst promoted the highly enantioselective addition of naphthols and activated phenols to ketimines derived from isatins. The reaction afforded chiral 3‐amino‐2‐oxindoles with a quaternary stereocenter in high yields (up 99 %) excellent enantioselectivity % ee ). To best our knowledge, this transformation is first ketimines.
Abstract The preparation, characterization, and photophysical electrocatalytic properties of carbon dot (CD)/MoS 2 ensembles is reported. Based on electrostatic interactions, ammonium‐functionalized MoS , which was prepared upon reaction 1,2‐dithiolane tert ‐butyl carbamate with followed by acidic deprotection, coupled CDs bearing multiple carboxylates their periphery, as derived microwave‐assisted polycondensation citric acid ethylenediamine alkaline treatment. Insights into electronic...
We have developed a simple and straightforward way to realize controlled postdoping toward 2D transition metal dichalcogenides (TMDs). The key idea is use low-kinetic-energy dopant beams high-flux chalcogen beam simultaneously, leading substitutional doping with densities. Atomic-resolution transmission electron microscopy has revealed that atoms injected TMDs are incorporated substitutionally into the hexagonal framework of TMDs. electronic properties doped (Nb-doped WSe2) shown drastic...
Abstract Mechanical exfoliation of layered materials is one the most effective methods for obtaining two-dimensional (2D) nanosheets. However, this approach still limited to van der Waals (vdW) materials, where interlayer interactions are governed by weak vdW forces. In study, we used a perovskite ferroelectric (CsPb2Nb3O10) as model system explore mechanical behavior ionically bonded non-vdW materials. Due relatively out-of-plane bonds involving Cs⁺ ions, CsPb2Nb3O10 could be cleaved into...
Low-dimensional carbon allotropes belong to the most revolutionary materials of last decades. The latest materialization confined carbyne, a linear chain sp1-hybridized encapsulated inside small-diameter nanotube host, is one extraordinary nano-engineering example. Inspired by these hybrid structures, in this work, we demonstrate feasibility synthesize nitrogen-doped carbyne using azafullerene (C59N) molecules nanotubes ("peapods") as precursors for growth carbyne. Resonance Raman...
Low-dimensional carbon allotropes belong to the most revolutionary materials of recent decades. Confined carbyne, a linear chain sp1-hybridized encapsulated inside small-diameter nanotube host, is one extraordinary nanoengineering example. Inspired by these hybrid structures, we demonstrate feasibility synthesize nitrogen-doped confined carbyne using azafullerenes (C59N) in nanotubes ("peapods") as precursors for growth carbyne. Resonance Raman spectroscopy site selective local probe has...
Abstract The covalent functionalization of MoS 2 with a perylenediimide (PDI) is reported and the study accompanied by detailed characterization newly prepared ‐PDI hybrid material. Covalently functionalized interfacing organic photoactive species has shown electron and/or energy accepting, reflecting or bi‐directional accepting features. Herein, rationally designed PDI, unsubstituted at perylene core to act as acceptor, forces fully demonstrate for first time its donor capabilities....
Abstract The functionalization of MoS 2 is paramount importance for tailoring its properties towards optoelectronic applications and unlocking full potential. Zinc phthalocyanine (ZnPc) carrying an 1,2‐dithiolane oxide linker was used to functionalize at defect sites located the edges. structure ZnPc‐MoS fully assessed by complementary spectroscopic, thermal, microscopy imaging techniques. An energy‐level diagram visualizing different photochemical events in established revealed a...
Covalent functionalization of tungsten disulfide (WS2 ) with photo- and electro-active nickel-porphyrin (NiP) is reported. Exfoliated WS2 interfacing NiP moieties 1,2-dithiolane linkages assayed in the oxygen evolution reaction under both dark illuminated conditions. The hybrid material presented, -NiP, fully characterized complementary spectroscopic, microscopic, thermal techniques. Standard yet advanced electrochemical techniques, such as linear sweep voltammetry, impedance spectroscopy,...
The preparation and assessment of a crown ether covalently grafted onto MoS<sub>2</sub> as an ion-selective electrode for sodium ions in biological fluids is presented.
We fabricated sensors by modifying the surface of MoS2 and WS2 with COVID-19 antibodies investigated their characteristics, including stability, reusability, sensitivity, selectivity. Thiols disulfanes in strongly interact vacant Mo or W sites WS2, yielding durable devices that are stable for several days air water. More importantly, detachment is suppressed even during aggressive cleaning process at pH 3, which allows reusing same device experiments without appreciable loss sensitivity....
Transition metal dichalcogenides (TMDs) are promising 2D nanomaterials for diverse applications, but their intrinsic chemical inertness hinders modification. Herein, a novel approach is presented the photocatalytic acylation of 2H-MoS