Article
Biochemistry & Molecular Biology
Antonio Baldanza, Maria Giovanna Pastore Carbone, Cosimo Brondi, Anastasios C. Manikas, Giuseppe Mensitieri, Christos Pavlou, Giuseppe Scherillo, Costas Galiotis
Summary: The study demonstrates the successful incorporation of graphene monolayers into a polymer matrix, resulting in a nanolaminate material with improved mechanical properties and gas barrier performance. This novel material has potential applications in various fields.
Article
Chemistry, Physical
Yun Ki Kim, Keun-Young Shin
Summary: This study presents a concise method to fabricate PPY on flexible graphene substrate, investigates the influence of initiators on pyrrole polymerization, and explores the effects of morphological changes and doping concentrations of PPY on capacitive behaviors. The assistance of dopamine enhances the uniformity of PPY layers and improves the supercapacitor performance, demonstrating the potential for wearable energy-storage devices application.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Alejandro Berdonces-Layunta, James Lawrence, Shayan Edalatmanesh, Jesus Castro-Esteban, Tao Wang, Mohammed S. G. Mohammed, Luciano Colazzo, Diego Pena, Pavel Jelinek, Dimas G. de Oteyza
Summary: Nanostructured graphene has been widely studied in recent years due to its tunable electronic properties for various fields. However, exposure of (3,1)-chiral graphene nanoribbons to oxidizing environments significantly oxidizes the ribbons and disrupts their electronic properties. Experiments show that even under gentle conditions, the ribbons are oxidized, providing insights into the reaction sites and defects caused by oxygen.
Review
Chemistry, Inorganic & Nuclear
Mohamed Bahri, Shushay Hagos Gebre, Mohamed Amin Elaguech, Fekadu Tsegaye Dajan, Marshet Getaye Sendeku, Chaker Tlili, Deqiang Wang
Summary: Graphene, with its high carrier mobility, thermal conductivity, optical transparency, and mechanical flexibility, is expected to find applications in environmental remediation, energy harvesting and storage, and medical gadgets. Chemical vapor deposition (CVD) is a promising method for synthesizing large-area graphene, and this review focuses on the design principles and applications of CVD techniques based on different conditions. The review also discusses recent advances and challenges in the growth of high-quality graphene for energy harvesting, environmental remediation, and health-related applications.
COORDINATION CHEMISTRY REVIEWS
(2023)
Article
Chemistry, Physical
Wen Qian Chen, Yi Heng Cheong, Xiaoxu Fu, Li Ya Ge, Andrei Veksha, Grzegorz Lisak
Summary: The study proposes a method for synthesizing GCN using Fe-assisted CCVD, resulting in higher yield and better functionality, leading to a 3D hierarchically porous material with higher specific capacitance, higher capacitance retention, and lower charge transfer resistance.
Article
Chemistry, Multidisciplinary
Valentin Jean Perillat, Erica Del Grosso, Cesare Berton, Francesco Ricci, Cristian Pezzato
Summary: This study demonstrates that DNA nanodevices can be controlled using visible light in a reversible and highly programmable manner in photo-switchable aqueous buffer solutions. The presented strategy is non-invasive and enables remote control of complex operations of DNA-based nanodevices, such as reversible release/loading of cargo molecules.
CHEMICAL COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Lachlan M. Oberg, Marietta Batzer, Alastair Stacey, Marcus W. Doherty
Summary: This study investigates the catalytic effect of surface-embedded nitrogen on diamond growth, revealing that nitrogen can promote nucleation of new diamond layers. A new model and mechanism for nitrogen overgrowth are proposed, shedding light on the role of nitrogen in enhancing diamond growth.
Article
Chemistry, Physical
Eric Navarrete, Frank Guell, Paulina R. Martinez-Alanis, Eduard Llobet
Summary: Different thicknesses of Au films were used in the growth of ZnO nanowires, with the 6 nm thick layers showing the most stable and repeatable gas sensing properties. Despite ZnO nanowires grown using the thickest Au layers reaching the highest responses under dry conditions, those grown using the thinnest Au film were more resilient at detecting NO2 in the presence of ambient moisture. The gas sensing results were discussed in light of defects and Au impurities in the ZnO nanowires, as revealed by characterization techniques such as X-ray diffraction, scanning electron microscopy, X-ray photoelectron spectroscopy, and photoluminescence spectroscopy.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Multidisciplinary
Muhammad Munem Ali, Jacob John Mitchell, Gregory Burwell, Klaudia Rejnhard, Cerys Anne Jenkins, Ehsaneh Daghigh Ahmadi, Sanjiv Sharma, Owen James Guy
Summary: The study focuses on creating a dielectric passivation film using molecular vapor deposition technology to protect graphene-based biosensing devices from harsh chemicals. By utilizing the reported healing effect of Al2O3 on graphene, the researchers aim to reduce photoresist residue and graphene defects for improved device homogeneity. This results in more reliable and homogeneous graphene devices that can be fabricated at wafer-scale for sensing and biosensing applications.
Article
Materials Science, Multidisciplinary
Justyna Kulczyk-Malecka, Isabella V. J. dos Santos, Marine Betbeder, Samuel J. Rowley-Neale, Zhaohe Gao, Peter J. Kelly
Summary: A cost-effective and scalable method for synthesizing high-quality vertically aligned graphene at low temperatures is proposed in this study, showing great potential for various advanced technologies. By optimizing the deposition conditions, the morphology, growth rate, and electrochemical performance of the graphene were tailored successfully.
Article
Energy & Fuels
Vusani M. Maphiri, Daba T. Bakhoum, Samba Sarr, Ndeye F. Sylla, Gift Rutavi, Ncholu Manyala
Summary: In this study, a binder free approach was used to prepare thermally reduced graphene oxide (TRGO) on Ni-Foam (NF) as a positive electrode for supercapacitors. The TRGO/NF electrode preparation method is simple, quick, cost-effective, and yields significant results. Experimental results showed that the TRGO/NF electrode exhibited high specific capacity and good electrochemical performance in 6 M KOH, with excellent stability.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Chemistry, Multidisciplinary
Xueyin Bai, Shisheng Li, Susobhan Das, Luojun Du, Yunyun Dai, Lide Yao, Ramesh Raju, Mingde Du, Harri Lipsanen, Zhipei Sun
Summary: The study demonstrates the successful synthesis of high-quality vertical bilayer MoS2/WS2 heterostructures with a grain size of up to 60 µm through a single-step CVD process. Unlike normal pyramid structures, an anti-pyramid MoS2/WS2 structure was synthesized, providing new insights into the synthesis and applications of two-dimensional heterostructures.
Article
Chemistry, Analytical
Mostafa A. Atia, Petr Smejkal, Vipul Gupta, Paul R. Haddad, Michael C. Breadmore
Summary: This study demonstrates the superior performance of chemical vapour deposition (CVD) coating for suppressing the electroosmotic flow (EOF) compared to liquid phase deposition (LPD) in capillary electrophoresis (CE). By adjusting the modification method and surface chemistry, the capillary can be easily and effectively modified, and the stability of the coating meets the long-term monitoring requirements for water chemistry.
ANALYTICA CHIMICA ACTA
(2023)
Article
Chemistry, Physical
Nabisab Mujawar Mubarak, J. N. Sahu, Rama Rao Karri, E. C. Abdullah, Manoj Tripathi
Summary: A new method for synthesizing carbon nanofibers by gas-phase with microwave-assisted chemical vapour deposition was introduced. The effects of hydrogen flow rate, microwave power, radiation time, and gas ratio were investigated. The optimized conditions for carbon nanofibers production were determined. The synthesized carbon nanofibers showed vertical alignment with a uniform diameter and high purity.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Materials Science, Composites
Kun Xi, Jiang Li, Yiwei Wang, Mengfei Guo, Kang Li
Summary: This study proposes a solution to the reduced thermal insulation performance caused by carbon nanotubes (CNTs) in composite insulation materials, by pre-coating the CNTs with a carbon layer. The experimental results show that the coated-CNTs formulation significantly reduces thermal conductivity and improves the char layer strength of the insulation material. Overall, the coated-CNTs not only enhance the thermal insulation performance by reducing thermal conductivity, but also improve particle erosion resistance by strengthening the char layer.
COMPOSITES SCIENCE AND TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Xin Chen, Malte Kohring, M'hamed Assebban, Bartlomiej Tywoniuk, Cian Bartlam, Narine Moses Badlyan, Janina Maultzsch, Georg S. Duesberg, Heiko B. Weber, Kathrin C. Knirsch, Andreas Hirsch
Summary: The study presents an efficient method to pattern 2D MoS2 into delicate ribbon patterns with a minimum feature size of 2 micrometers, combining electron beam lithography with surface covalent functionalization. The patterned monolayer MoS2 domain consists of a well-defined heterophase homojunction and alternately distributed surface characteristics, showing great potential for further exploration in MoS2 based devices.
CHEMISTRY-A EUROPEAN JOURNAL
(2021)
Article
Nanoscience & Nanotechnology
Shayan Parhizkar, Maximilian Prechtl, Anna Lena Giesecke, Stephan Suckow, Sophia Wahl, Sebastian Lukas, Oliver Hartwig, Nour Negm, Arne Quellmalz, Kristinn Gylfason, Daniel Schall, Matthias Wuttig, Georg S. Duesberg, Max C. Lemme
Summary: This article describes the study of low-cost, easily integrable photodetectors based on the two-dimensional material PtSe2, which can operate in a higher wavelength range and has high responsivity and low response time. The PtSe2 photodetectors integrated by direct growth outperform those manufactured by the standard 2D layer transfer method. PtSe2 shows promising potential for optoelectronics and photonic-integrated circuits due to its infrared responsivity, chemical stability, selective and conformal growth at low temperatures, and high carrier mobility.
Article
Chemistry, Multidisciplinary
E. Harriet Ahlgren, Alexander Markevich, Sophie Scharinger, Bernhard Fickl, Georg Zagler, Felix Herterich, Niall McEvoy, Clemens Mangler, Jani Kotakoski
Summary: Oxidation is the main cause of degradation in 2D materials, especially transition metal dichalcogenides (TMDs). This study investigates the chemical effects of oxygen on single-layer MoS2 and MoTe2 under controlled low-pressure oxygen environments using in situ electron microscopy. It is found that MoTe2 is reactive to oxygen and undergoes significant degradation, while MoS2 is inert. Additionally, hydrocarbon contamination accelerates the degradation rate of TMDs. The findings provide important insights into the oxygen-related deterioration of 2D materials.
ADVANCED MATERIALS INTERFACES
(2022)
Article
Chemistry, Physical
Hugo Nolan, Christian Schroder, Marc Brunet-Cabre, Filippo Pota, Niall McEvoy, Kim McKelvey, Tatiana S. Perova, Paula E. Colavita
Summary: The study investigates the effects of N-functionalities on MoS2 supported on carbon for hydrogen evolution reaction (HER) performance. It is found that the presence of pyridinic-N groups at the carbon support suppresses HER activity at high pH due to the modulation of deprotonation and lone-pair availability. This suggests important implications for the design of heterostructured electrocatalysts to control performance in HER electrocatalysis by exploiting synergistic/inhibitory behaviors.
Article
Chemistry, Multidisciplinary
Jonas Gosch, Kevin Synnatschke, Norbert Stock, Claudia Backes
Summary: Sonication-assisted liquid phase exfoliation was used to study the exfoliation of six different layered coordination polymers in aqueous surfactant solution. The research suggests that larger open pores are more conducive to producing nanosheets with a higher aspect ratio.
CHEMICAL COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Daire Tyndall, Michael John Craig, Lee Gannon, Cormac McGuinness, Niall McEvoy, Ahin Roy, Max Garcia-Melchor, Michelle P. Browne, Valeria Nicolosi
Summary: Nickel-iron layered double hydroxides are highly active catalysts for the oxygen evolution reaction, but their stability within the active voltage window is limited. This study identifies the source of catalyst instability by tracking changes in the material during OER activity. In-situ and ex-situ Raman analyses reveal long-term effects on catalyst performance due to crystallographic phase changes. Electrochemically stimulated compositional degradation and leaching of Fe metals from highly active edge sites are identified as the main causes of activity loss.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Materials Science, Multidisciplinary
Kangho Lee, Beata M. Szydlowska, Oliver Hartwig, Kevin Synnatschke, Bartlomiej Tywoniuk, Tomas Hartman, Tijana Tomasevic-Ilic, Cian P. Gabbett, Jonathan N. Coleman, Zdenek Sofer, Marko Spasenovic, Claudia Backes, Georg S. Duesberg
Summary: Liquid-phase exfoliation (LPE) is a versatile and scalable method for producing two-dimensional (2D) materials. In this study, highly conductive films made of platinum diselenide (PtSe2) flakes were successfully fabricated using LPE. These films showed uniform morphology and electrical behavior, and were used to create a chemiresistive sensor structure capable of detecting ammonia gas at sub-0.1 parts per million (ppm) levels. Remarkably, the PtSe2-based devices remained fully functional even after 15 months, demonstrating their high stability.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Chemistry, Multidisciplinary
Rita Tilmann, Cian Bartlam, Oliver Hartwig, Bartlomiej Tywoniuk, Nikolas Dominik, Conor P. Cullen, Lisanne Peters, Tanja Stimpel-Lindner, Niall McEvoy, Georg S. Duesberg
Summary: The interest in 2D materials is increasing due to the discovery of compounds with unique electrical, optical, chemical, and thermal characteristics. We report the presence of polymeric adlayers on layered transition metal dichalcogenides (TMDs), which are not easily identifiable using common analytic methods. These atomically thin layers consist of hydrocarbons, which preferentially adsorb to the hydrophobic surfaces of TMDs. The presence of polymeric films on 2D materials has implications for their investigation, processing, and applications.
Review
Chemistry, Multidisciplinary
Niamh Willis-Fox, Erica Watchorn-Rokutan, Etienne Rognin, Ronan Daly
Summary: Polymer mechanochemistry utilizes mechanical forces to break and manipulate chemical bonds, making it an ideal choice for force sensing in various emerging applications. In this review, the interdependencies between moiety design, matrix material choice, integration, and manufacturing processes are identified for polymer mechanochemistry force sensors. The challenges in commercializing these sensors based on polymer mechanophores are highlighted.
TRENDS IN CHEMISTRY
(2023)
Article
Nanoscience & Nanotechnology
Julia Lawless, Oisiin McCormack, Joshua Pepper, Niall McEvoy, A. Louise Bradley
Summary: Nanoparticle-on-mirror systems are a reliable method of compressing light into sub-nanometer volumes, and graphene can be used as a spacer in such systems to modulate the plasmonic modes. In this study, a simple system consisting of a gold nanosphere on top of a gold mirror separated by a graphene monolayer is investigated. The results show that the plasmonic response of the coupled nanosphere can be controlled by doping the graphene and adjusting the gap size, and at high doping levels, the plasmon energies can split due to the interaction between charge-transfer plasmon and gap plasmon. This study provides support for the unification of theories proposed by previous works.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Materials Science, Multidisciplinary
Kuanysh Zhussupbekov, Lida Ansari, Kenan Elibol, Ainur Zhussupbekova, Jani Kotakoski, Igor V. Shvets, Georg S. Duesberg, Paul K. Hurley, Niall Mcevoy, Cormac O'Coileain, Farzan Gity
Summary: The properties and performance of platinum diselenide (PtSe2) films, synthesized by thermally assisted conversion, were investigated using various spectroscopic and microscopic methods. The presence of distinct edge states was observed, and the origin of these states was investigated using theoretical tools and atomistic modeling. The results showed that the edges of polycrystalline films can have semiconducting or semimetallic properties depending on their configuration. The study also explored the potential of using a monomaterial heterojunction based field-effect transistor, which demonstrated excellent performance due to the critical role of the edge states in facilitating carrier transport.
APPLIED MATERIALS TODAY
(2023)
Proceedings Paper
Engineering, Electrical & Electronic
Arne Quellmalz, Simon Sawallich, Maximilian Prechtl, Oliver Hartwig, Georg S. Duesberg, Max C. Lemme, Frank Niklaus, Kristinn B. Gylfason
Summary: In this paper, a generic methodology for the large-area transfer of 2D materials and their heterostructures is presented. The approach utilizes adhesive wafer bonding and processes readily available in most large-scale semiconductor manufacturing lines. Experimental results demonstrate successful transfer and formation of different composite structures, indicating an important step towards the commercial use of 2D materials in optics and photonics.
2D PHOTONIC MATERIALS AND DEVICES V
(2022)
Article
Materials Science, Multidisciplinary
Tanyaradzwa N. Mangoma, Shunsuke Yamamoto, George G. Malliaras, Ronan Daly
Summary: Organic electrochemical transistors (OECTs) are essential in bioelectronics and printed electronics applications due to their simple structure, ease of tunability, biocompatibility, and suitability for different fabrication routes. This study presents a hybrid direct-write additive manufacturing approach to fabricating OECTs, combining 3D printing of conducting and insulating layers with inkjet printing of semiconducting thin films. The results demonstrate that this manufacturing method can rapidly produce OECTs and neuromorphic devices with good performance.
ADVANCED MATERIALS TECHNOLOGIES
(2022)
Article
Chemistry, Multidisciplinary
Kalpataru Panda, Jae-Eun Kim, Kamatchi Jothiramalingam Sankaran, I-Nan Lin, Ken Haenen, Georg S. Duesberg, Jeong Young Park
Summary: A novel method for writing charged areas on diamond nanowire surfaces using AFM tips was reported, revealing the presence of nano-sized diamond-graphite composites. Hydrogenation was observed to enhance charge-trapping properties through disintegration of the composites, increasing metallic nanographitic phase fractions. This study highlights the potential of hydrogenation in effective charge trapping and storage for diamond nanocarbon materials.
Article
Chemistry, Multidisciplinary
Conor P. Cullen, Cormac O. Coileain, John B. McManus, Oliver Hartwig, David McCloskey, Georg S. Duesberg, Niall McEvoy
Summary: This study explores the differences in characteristics and synthesis methods between PtS2 and non-layered PtS within Group-10 transition metal dichalcogenides (TMDs), providing a systematic characterization of these materials.
