Article
Chemistry, Applied
Asterios Charisiadis, Eleni Glymenaki, Aurelien Planchat, Sofia Margiola, Anna-Caroline Lavergne-Bril, Emmanouil Nikoloudakis, Vasilis Nikolaou, Georgios Charalambidis, Athanassios G. Coutsolelos, Fabrice Odobel
Summary: In this study, four different porphyrin-ruthenium dyads were utilized as sensitizers in both nand p-type DSSCs and DSPECs, demonstrating that dyads with ruthenium complexes exhibit improved performance in both systems.
Article
Nanoscience & Nanotechnology
Helena Uceta, Andrea Cabrera-Espinoza, Myriam Barrejon, Josei G. Sanchez, Edgar Gutierrez-Fernandez, Ivet Kosta, Jaime Martin, Silvia Collavini, Eugenia Martinez-Ferrero, Fernando Langa, Juan Luis Delgado
Summary: This study reports for the first time the incorporation of p-type functionalized carbon nanohorns (CNHs) in perovskite solar cells (PSCs) and compares them with p-type functionalized single- and double-walled carbon nanotubes (SWCNTs and DWCNTs). The p-type functionalized carbon nanomaterial (CNM) derivatives were successfully synthesized and incorporated into the hole transport layer (HTL) to evaluate their impact on PSCs. The results show that all p-type functionalized CNMs significantly improve the power conversion efficiency (PCE) by enhancing the short-circuit current density (J(sc)) and fill factor (FF). The incorporation of CNHs derivatives showed slightly better PCE compared to SWCNTs and DWCNTs derivatives. Moreover, the incorporation of p-type functionalized CNMs improves device stability by enhancing the hydrophobicity of the layer and hole transport across the interface.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Materials Science, Composites
Olga V. Sedelnikova, Kseniya I. Baskakova, Dzmitry S. Bychanok, Eugene A. Maksimovskiy, Lyubov G. Bulusheva, Alexander Okotrub
Summary: Functionalized carbon nanohorns were synthesized and used as fillers in polymer composites. The functionalization increased the conductivity of the carbon nanohorns, resulting in improved electromagnetic response and lower electrical percolation threshold of the composites.
COMPOSITES SCIENCE AND TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Arreerat Jiamprasertboon, Sarunya Sertwatsana, Lappawat Ngamwongwan, Weradesh Sangkhun, Anurak Waehayee, Praphaiphon Phonsuksawang, Atipong Bootchanont, Supinya Nijpanich, Wutthikrai Busayaporn, Hideki Nakajima, Suwit Suthirakun, Teera Butburee, Theeranun Siritanon
Summary: This study focuses on the impact of solvents/additives variation on the hydrothermal and solvothermal syntheses of nanocrystal BiVO4 films. The physico-chemical characteristics of the solvents/additives have significant effects on the crystal morphologies and surface crystal planes. The photoanodes with plate-like particles exhibit better catalytic activities due to the exposed {121} facets and improved charge transfer properties. The findings of this research may be valuable for the fabrication of photoelectrodes with wider applications.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Physical
Mohit Prasad, Vidhika Sharma, Subhash Pandharkar, Pratibha Shinde, Ashvini Punde, Vidya Doiphode, Ashish Waghmare, Rahul Aher, Priti Vairale, Vijaya Jadkar, Yogesh Hase, Sachin Rondiya, Sandesh Jadkar
Summary: Carbon functionalized bismuth vanadate (BVO) photoanodes were synthesized using a simple wet chemical process, and various characterizations were carried out to evaluate their performance. The C-BVO photoanodes demonstrated superior photoconversion efficiency and short circuit current compared to pristine BVO. In addition, PEC logic gates were designed based on bare BVO using pulsed white light beams.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Xin Sun, Min Wang, Qi Geng, Shuailin Chen, Xiaojun Lv, Xunlei Ding, Meicheng Li
Summary: This study demonstrates the use of aluminum ferrite (AFO) as a stable solar absorber in photoelectrochemical cells, showcasing its attractive performance. AFO thin-film photoelectrodes composed of vertically oriented nanosheets exhibit a photocurrent density of +0.78 mA.cm(-2) at 1.23 V vs. RHE, with a U-onset close to the flat band potential of 0.5 V vs. RHE in the presence of hole scavengers. AFO also exhibits rare coincidence between U-onset and flat band potential for solar water splitting, along with other favorable optoelectronic properties and carrier lifetimes, suggesting its great potential for photoelectrochemical cell applications.
Article
Chemistry, Multidisciplinary
Yuxiang Wang, Daoming Chen, Jingnan Zhang, M-Sadeeq (Jie Tang) Balogun, Pingshan Wang, Yexiang Tong, Yongchao Huang
Summary: Carbon doping and introduction of carbon quantum dots can improve the electronic conductivity and light absorption capability of BiVO4, thus enhancing the separation and transfer of photo-generated charges. Electroplating a polyaniline layer onto the catalyst can sustain a stable photocurrent density for a long time.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Physical
Yash Gargasya, Melissa K. Gish, Vineet V. Nair, Justin C. Johnson, Matt Law
Summary: The study found that beta-Mn2V2O7 dissolves in water, corrodes in electrolytes at pH 7 and 9, and converts to amorphous manganese (hydr)oxides at pH 13. The beta-Mn2V2O7 films showed minimal photocurrents even in electrolytes where film degradation was insignificant, likely due to fast hole trapping and recombination at the MVO surface.
CHEMISTRY OF MATERIALS
(2021)
Article
Biochemistry & Molecular Biology
Neda Karimi Khorrami, Mohsen Radi, Sedigheh Amiri, David Julian McClements
Summary: This study demonstrates the successful incorporation of NLCs into calcium-alginate films, improving their UV-absorbing properties and modulating their physicochemical characteristics. The increase in NLC concentration resulted in decreased mechanical properties but enhanced thermal stability and water vapor permeability of the films.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2021)
Article
Materials Science, Multidisciplinary
Tianyi Li, Vigneshwar Sakthivelpathi, Zhongjie Qian, Seong-Joong Kahng, Sanggyeun Ahn, Anthony B. Dichiara, Krithika Manohar, Jae-Hyun Chung
Summary: This paper presents a capacitive sensor composed of a nanostructured electrode array for contact and noncontact detection. By utilizing high aspect ratio cellulose fibers embedded with carbon nanotubes, the sensor achieves high sensitivity for proximity detection. It can detect both touch and noncontact gestures of human hands, as well as measure water mass in glass and metal cups. A smart pad capable of recognizing human gestures, gait, and water mass with unprecedented sensitivity is demonstrated.
ADVANCED MATERIALS TECHNOLOGIES
(2022)
Article
Engineering, Mechanical
Kuk-Jin Seo, Hyun-Joon Kim, Dae-Eun Kim
Summary: This work demonstrates that a soft, thin film made of randomly aligned carbon nanotubes can reduce surface wear more effectively than a homogeneous thin film due to its mesh structure, which enhances elastic recoverability and relieves contact stress. These findings provide insights for designing highly wear-resistant surfaces using nanostructures.
Article
Chemistry, Multidisciplinary
Florin Andrei, Valentin Ion, Ruxandra Birjega, Maria Dinescu, Nicoleta Enea, Dan Pantelica, Maria Diana Mihai, Valentin-Adrian Maraloiu, Valentin Serban Teodorescu, Ioan-Cezar Marcu, Nicu Doinel Scarisoreanu
Summary: The study investigates the formation of self-assembled nanodomains in LaFeO3 epitaxial thin films and their effects on the photoelectrochemical properties, revealing detrimental effects on PEC functional properties when nanopyramids-like domains appear after a thickness threshold. The research provides insights into the structural and stoichiometric features that influence the photocurrent density and onset potential exhibited by LFO photoelectrodes. Moreover, the highest photocurrent density values were observed for the thinnest LFO/Nb:SrTiO3 sample, showing excellent stability over time and unbiased hydrogen evolution from water.
Article
Chemistry, Multidisciplinary
Walid Ismail, Ghada Ibrahim, Mohamed A. Habib, Omar K. Alduaij, Mahmoud Abdelfatah, Abdelhamid El-Shaer
Summary: CdS thin films were grown on an FTO substrate at different temperatures using the hydrothermal method. The films exhibited a cubic structure with a (111) orientation. The films had a dense and uniform morphology, with strong adhesion to the substrate. The films showed green and red emission peaks, corresponding to free-carrier recombination and sulfur or cadmium vacancies. The CdS thin films had an optical absorption edge between 500 and 517 nm, and were n-type semiconductors. The resistivity to charge transfer decreased with temperature, while the flat band potential and donor density fluctuated with temperature. CdS thin films have potential in optoelectronic applications.
Article
Nanoscience & Nanotechnology
Julia Alvarez-Malmagro, Ana R. Oliveira, Cristina Gutierrez-Sanchez, Beatriz Villajos, Ines A. C. Pereira, Marisela Velez, Marcos Pita, Antonio L. De Lacey
Summary: This study investigates the covalent bonding of Desulfovibrio vulgaris Hildenborough FdhAB formate dehydrogenase to gold and graphite electrodes, showing a compact enzyme layer anchored to the electrode surface for the reduction of CO2 to formic acid via direct electron transfer. The operational stability of CO2 electroreduction to formate by direct electron transfer is demonstrated with approximately 100% Faradaic yield.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Kevin W. Kayang, Abu Horaira Banna, Alexey N. Volkov
Summary: The effect of nanotube chirality on the mechanical properties of materials composed of single-walled carbon nanotubes (CNTs) is studied. It is found that the shear modulus and strength increase with decreasing CNT diameter. The mechanical properties of CNT films are strongly dependent on CNT diameter, with increasing film modulus and decreasing tensile strength as the CNT diameter increases.
Article
Chemistry, Multidisciplinary
Shunta Nakamura, Hayato Sakai, Masaaki Fuki, Rikuto Ooie, Fumitaka Ishiwari, Akinori Saeki, Nikolai V. V. Tkachenko, Yasuhiro Kobori, Taku Hasobe
Summary: We have synthesized a series of Tc oligomers and proposed a molecular design strategy for efficient exciton transport in linear oligomers. By promoting correlated TT dissociation and controlling sequential exciton trapping process, we observed high-yield exciton trapping. The results reveal the importance of entropic effects and vibronic coupling for enhanced exciton migration.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Kazuhisa Yamasumi, Kentaro Ueda, Yohei Haketa, Yusuke Hattori, Masayuki Suda, Shu Seki, Hayato Sakai, Taku Hasobe, Ryoya Ikemura, Yoshitane Imai, Yukihide Ishibashi, Tsuyoshi Asahi, Kazuto Nakamura, Hiromitsu Maeda
Summary: A squarylium-based pi-electronic cation with an augmented dipole was synthesized by methylation, and it formed different ion pairs in combination with anions. These ion pairs showed unique photophysical properties and cation stacking in the dispersed and crystalline states, respectively. Notably, complete segregation of cations and anions was observed in a pseudo-polymorph, and the charge-segregated ion pairing assembly exhibited electric conductivity along the stacking axis.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Physical
Aspasia Stoumpidi, Adelais Trapali, Marie Poisson, Alexandre Barrozo, Sylvain Bertaina, Maylis Orio, Georgios Charalambidis, Athanassios G. Coutsolelos
Summary: Iron porphyrins are efficient molecular catalysts for CO2 reduction, and a suitably modified Fe-III porphyrin showed excellent catalytic activity in the photocatalytic reduction of CO2, producing mainly CO with high selectivity.
Article
Materials Science, Multidisciplinary
Hayato Sakai, Yudai Suzuki, Makoto Tsurui, Yuichi Kitagawa, Takuya Nakashima, Tsuyoshi Kawai, Yuta Kondo, Go Matsuba, Yasuchika Hasegawa, Taku Hasobe
Summary: Chiral 1,1'-bi-2-naphthol (BINOL)-substituted boron dipyrromethene (BODIPY) derivatives with different numbers of phenyl groups were synthesized to study their aggregation-enhanced emission and circularly polarized luminescence (CPL). The self-assembly of 0Ph-B-BODIPY resulted in fibrous nanoarchitectures, while spherical nanoparticles were formed in 1Ph-B-BODIPY and 2Ph-B-BODIPY. The nanofibers of 0Ph-B-BODIPY exhibited broad emission and CPL spectra in the red to NIR regions, with enhanced dissymmetry factors compared to the monomer and 1Ph-B-BODIPY nanoparticles.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Chemistry, Multidisciplinary
Antonia Kagkoura, Christina Stangel, Raul Arenal, Nikos Tagmatarchis
Summary: Functionalized molybdenum diselenide (MoSe2) and tungsten diselenide (WSe2) were synthesized via metal-ligand coordination and subsequent covalent grafting of a cobalt-porphyrin. The resulting hybrid materials exhibited enhanced activity for electrocatalytic hydrogen evolution reaction compared to pristine MoSe2 and WSe2. The modification route provides a versatile functionalization procedure for other transition metal dichalcogenides and opens new pathways for functional nanomaterials in electrocatalysis.
Article
Chemistry, Multidisciplinary
Zoi Georgiopoulou, Apostolis Verykios, Kalliopi Ladomenou, Katerina Maskanaki, Georgios Chatzigiannakis, Konstantina-Kalliopi Armadorou, Leonidas C. C. Palilis, Alexander Chroneos, Evangelos K. K. Evangelou, Spiros Gardelis, Abd. Rashid bin Mohd Yusoff, Athanassios G. G. Coutsolelos, Konstantinos Aidinis, Maria Vasilopoulou, Anastasia Soultati
Summary: In this study, carbon nanodots are shown to play a beneficial role as electron transport materials in OLEDs and OSCs. The properties of both pristine and nitrogen-functionalized carbon dots are systematically studied using various techniques to uncover their energetic alignment and interaction with the organic semiconductor's emissive layer. The results reveal significant improvements in the current and luminescent characteristics of the OLED devices, mainly due to a decrease in electron injection barrier. The power conversion efficiency of the OSCs using carbon dots as cathode interfacial layers also increases by nearly 10% compared to the reference device. The use of low-cost solution-processed materials in OLEDs and OSCs has the potential for widespread implementation in large-area applications.
Article
Chemistry, Multidisciplinary
Vasilis Nikolaou, James W. Wood, Georgios Charalambidis, Athanassios Coutsolelos, Eugen Stulz
Summary: The efficiency of attaching different porphyrins onto oligodeoxynucleotides (ODNs) using azide-alkyne cycloaddition (click chemistry), both Cu-catalysed and Cu-free, was compared to amide coupling reaction. Terminal attachment using the different methodologies provides varying yields of porphyrin-ODNs, and these porphyrin-ODNs can be transformed into multiporphyrin arrays using DNA-templated assembly. These arrays demonstrate efficient and alternative route to multiporphyrin assemblies by showing exciton coupling between the porphyrin units.
JOURNAL OF PORPHYRINS AND PHTHALOCYANINES
(2023)
Article
Chemistry, Multidisciplinary
Shinya Sugiura, Takashi Kubo, Yohei Haketa, Yuta Hori, Yasuteru Shigeta, Hayato Sakai, Taku Hasobe, Hiromitsu Maeda
Summary: Quinoidal molecules based on dipyrrolyldiketone boron complexes (QPBs) with partially conjugated pyrrole units as spin coupler were synthesized. The introduction of a benzo unit at the pyrrole beta-positions stabilized QPB, forming a closed-shell tautomer conformation with near-infrared absorption. By adding bases, the deprotonated species monoanion QPB- and dianion QPB2- were formed, showing over 1000 nm absorption and ion pairs with countercations. Ion-pairing with pi -electronic and aliphatic cations modulated the diradical properties of QPB2-, characterized by cation-dependent hyperfine coupling constants. VT NMR, ESR, and theoretical study revealed the higher stability of the singlet diradical compared to the triplet diradical.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Anastasia Soultati, Maria Verouti, Ermioni Polydorou, Konstantina-Kalliopi Armadorou, Zoi Georgiopoulou, Leonidas C. Palilis, Ioannis Karatasios, Vassilis Kilikoglou, Alexander Chroneos, Athanassios G. Coutsolelos, Panagiotis Argitis, Maria Vasilopoulou
Summary: Two gallium porphyrins were synthesized and used as an electron cascade in ternary organic bulk heterojunction films. The energy levels of the gallium porphyrins matched well with those of the polymer donor and fullerene acceptor, forming an efficient cascade system. The ternary organic solar cells using the gallium porphyrins showed enhanced efficiency, except at high concentrations where the nanomorphology of the films was affected. The best performing devices also exhibited improved photostability.
Article
Chemistry, Multidisciplinary
Vasilis Nikolaou, Eleni Agapaki, Emmanouil Nikoloudakis, Katerina Achilleos, Kalliopi Ladomenou, Georgios Charalambidis, Evitina Triantafyllou, Athanassios G. Coutsolelos
Summary: Dye-sensitized photocatalytic systems (DSPs) were developed using porphyrins as photosensitizer-catalyst (PS/CAT) entities chemisorbed onto platinum-doped titanium dioxide nanoparticles (Pt-TiO2 NPs). The DSPs coated with Pt-Tc3CP (PS/CAT entity) showed a record-high stability (25,500 TONs) and H2 evolution activity (707 mmol g-1 h-1) compared to similar DSPs in the literature.
CHEMICAL COMMUNICATIONS
(2023)
Article
Medicine, General & Internal
Ismene A. Dontas, Pavlos Lelovas, Sofia Parara, Antonios Galanos, Georgios Agrogiannis, Dimitris Goutas, Georgios Charalambidis, Vasilis Nikolaou, Georgios Landrou, Chrysoula Kokotidou, Chrysanthi-Pinelopi Apostolidou, Anna Mitraki, Athanassios G. Coutsolelos
Summary: The efficacy of hydrogel with encapsulated porphyrin (H+P) on surgically-induced skin defects was evaluated. The study showed that H+P benefited the healing process of skin defects in both young and mature animals, with more significant results observed in the mature animals.
CUREUS JOURNAL OF MEDICAL SCIENCE
(2023)
Article
Chemistry, Inorganic & Nuclear
Dimitra K. Gioftsidou, Georgios Landrou, Charikleia Tzatza, Antonios Hatzidimitriou, Emmanouil Orfanos, Georgios Charalambidis, Kalliopi Ladomenou, Athanassios G. Coutsolelos, Panagiotis A. Angaridis
Summary: Solar energy conversion to chemical energy through light-induced H2O splitting for hydrogen production can be achieved by developing sustainable photocatalytic systems. In this study, low-cost and high-abundance nickel catalysts combined with nitrogen-doped carbon dots were used to efficiently produce hydrogen from aqueous protons. The catalytic activity of the nickel catalysts was influenced by the electron-donating ability of the ligands, with the hexanuclear complex showing the highest catalytic efficiency. This study highlights the importance of precise polynuclear nickel catalysts in light-induced hydrogen production and provides a guide for future catalyst design.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Multidisciplinary
Tomokazu Kinoshita, Shunta Nakamura, Makoto Harada, Taku Hasobe, Gaku Fukuhara
Summary: This study aims to control exciton formation in a pentacene dimer through intramolecular singlet fission (SF) using hydrostatic pressure as an external stimulus. The use of hydrostatic pressure accelerates the SF dynamics and shortens the triplet lifetime, providing a new perspective for controlling SF-based materials. The findings suggest that hydrostatic pressure can be an attractive alternative to conventional control strategies.
