jablonkagroup/rise_ai_scientists huggingface dataset:
Authors: Zhihao Sun | Zihao Guo | Shaoyao Tian | Jingyu Bi | Guangshen Li | Ying Sha | Jianshu Wang | Lanling Zhao | Lei Qian
Source: ACS Nano (article, 2024-09-23)
Field: Materials Science — Electronic, Optical and Magnetic Materials

Interfacial and Defective Construction from Diverse Cu<sub><i>x</i></sub>S<sub><i>y</i></sub> Quantum Dots toward Broadband Carbon-Based Microwave Absorber In this study, highly monodisperse copper sulfide (Cu<sub><i>x</i></sub>S<sub><i>y</i></sub>) quantum dots (QDs) have been successfully obtained using a ligand-chemistry strategy, and then a variety of S-deficient Cu<sub><i>x</i></sub>S<sub><i>y</i></sub>/nitrogen-doped carbon (NC) heterointerfaces are constructed by compositional fine-tuning (Cu<sub>9</sub>S<sub>5</sub> → Cu<sub>1.96</sub>S → Cu). First-principles calculations show that the S-deficient domains of Cu<sub><i>x</i></sub>S<sub><i>y</i></sub> QDs and N-doped domains of carbon synergistically enhance the electron transfer from Cu<sub><i>x</i></sub>S<sub><i>y</i></sub> to NC. In addition, the finite element simulations demonstrate that the diverse Cu<sub><i>x</i></sub>S<sub><i>y</i></sub> QDs exhibit their intrinsic size and dielectric confinement effects to precisely manipulate the electric field distortion and improve the relaxation polarization. Consequently, Cu<sub><i>x</i></sub>S<sub><i>y</i></sub>@NC achieves excellent impedance matching and a strong loss mode dominated by dielectric polarization. Among them, Cu<sub><i>x</i></sub>S<sub><i>y</i></sub>@NC-650 has a maximum effective absorption bandwidth of 7.7 GHz at 2.5 mm, while Cu<sub><i>x</i></sub>S<sub><i>y</i></sub>@NC-700 features a minimum reflection loss of -66.7 dB at 13.7 GHz, respectively. Furthermore, the simulations of radar cross-sections have confirmed that the Cu<sub><i>x</i></sub>S<sub><i>y</i></sub>@NC series is promising in the field of radar stealth. Quantum dot ; Microwave ; Materials science ; Carbon fibers ; Broadband ; Optoelectronics ; Carbon quantum dots ; Nanotechnology ; Physics ; Optics ; Quantum mechanics Electromagnetic wave absorption materials ; Advanced Antenna and Metasurface Technologies ; Carbon and Quantum Dots Applications
Authors: Seong Yeon Park | Seo Yeong Son | Inwoo Lee | Hyuck-Jin Nam | Boeun Ryu | Sejung Park | Changhun Yun
Source: ACS Applied Materials & Interfaces (article, 2024-08-24)
Field: Materials Science — Polymers and Plastics

Highly Sensitive Biosensors Based on All-PEDOT:PSS Organic Electrochemical Transistors with Laser-Induced Micropatterning Recent advances in numerous biological applications have increased the accuracy of monitoring the level of biologically significant analytes in the human body to manage personal nutrition and physiological conditions. However, despite promising reports about costly wearable devices with high sensing performance, there has been a growing demand for inexpensive sensors that can quickly detect biological molecules. Herein, we present highly sensitive biosensors based on organic electrochemical transistors (OECTs), which are types of organic semiconductor-based sensors that operate consistently at low operating voltages in aqueous solutions. Instead of the gold or platinum electrode used in current electrochemical devices, poly(3,4-ethylenedioxythiophene):poly(4-styrenesulfonate) (PEDOT:PSS) was used as both the channel and gate electrodes in the OECT. Additionally, to overcome the patterning resolution limitations of conventional solution processing, we confirmed that the irradiation of a high-power IR laser (λ = 1064 nm) onto the coated PEDOT:PSS film was able to produce spatially resolvable micropatterns in a digital-printing manner. The proposed patterning technique exhibits high suitability for the fabrication of all-PEDOT:PSS OECT devices. The device geometry was optimized by fine-tuning the gate area and the channel-to-gate distance. Consequently, the sensor for detecting ascorbic acid (vitamin C) concentrations in an electrolyte exhibited the best sensitivity of 125 μA dec<sup>-1</sup> with a limit of detection of 1.3 μM, which is nearly 2 orders of magnitude higher than previous findings. Subsequently, an all-plastic flexible epidermal biosensor was established by transferring the patterned all-PEDOT:PSS OECT from a glass substrate to a PET substrate, taking full advantage of the flexibility of PEDOT:PSS. The prepared all-plastic sensor device is highly cost-effective and suitable for single-use applications because of its acceptable sensing performance and reliable signal for detecting vitamin C. Additionally, the epidermal sensor successfully obtained the temporal profile of vitamin C in the sweat of a human volunteer after the consumption of vitamin C drinks. We believe that the highly sensitive all-PEDOT:PSS OECT device fabricated using the accurate patterning process exhibits versatile potential as a low-cost and single-use biosensor for emerging bioelectronic applications. PEDOT:PSS ; Materials science ; Biosensor ; Nanotechnology ; Ascorbic acid ; Optoelectronics ; Transistor ; Electrode ; Voltage ; Electrical engineering ; Chemistry ; Layer (electronics) Conducting polymers and applications ; Advanced Sensor and Energy Harvesting Materials ; Analytical Chemistry and Sensors
Authors: Dhrumil R. Shah | Iman Nezam | Wei Zhou | Laura Proaño | Christopher W. Jones
Source: Energy & Fuels (article, 2024-01-09)
Field: Chemistry — Inorganic Chemistry

Isomorphous Substitution in ZSM-5 in Tandem Methanol/Zeolite Catalysts for the Hydrogenation of CO<sub>2</sub> to Aromatics Intensified reactors for conversion of CO<sub>2</sub> to methanol (via hydrogenation) using metal oxide catalysts coupled with methanol conversion to aromatics in the presence of zeolites (e.g., H-ZSM-5) in a single step are investigated. Brønsted acid sites (BAS) in H-ZSM-5 are important sites in methanol aromatization reactions, and correlations of the reactivity with zeolite acid properties can guide reaction optimization. A classical way of tuning the acidity of zeolites is via the effect of the isomorphous substitution of the heteroatom in the framework. In this work, H-[Al/Ga/Fe]-ZSM-5 zeolites are synthesized with Si/<i>T</i> ratios = 80, 300, affecting the acid site strength as well as distribution of Brønsted and Lewis acid sites. On catalytic testing of the H-[Al/Ga/Fe]-ZSM-5/ZnO-ZrO<sub>2</sub> samples for tandem CO<sub>2</sub> hydrogenation and methanol conversion, the presence of weaker Brønsted acid sites improves the aromatics selectivity (CO<sub>2</sub> to aromatics selectivity ranging from 13 to 47%); however, this effect of acid strength was not observed at low <i>T</i> atom content. Catalytic testing of H-[B]-ZSM-5/ZnO-ZrO<sub>2</sub> provides no conversion of CO<sub>2</sub> to hydrocarbons, showing that there is a minimum acid site strength needed for measurable aromatization reactivity. The H-[Fe]-ZSM-5-80/ZnO-ZrO<sub>2</sub> catalyst shows the best catalytic activity with a CO<sub>2</sub> conversion of ∼10% with a CO<sub>2</sub> to aromatics selectivity of ∼51%. The catalyst is shown to provide stable activity and selectivity over more than 250 h on stream. Aromatization ; Catalysis ; Chemistry ; Methanol ; Acid strength ; ZSM-5 ; Zeolite ; Selectivity ; Brønsted–Lowry acid–base theory ; Reactivity (psychology) ; Inorganic chemistry ; Heteroatom ; Organic chemistry Zeolite Catalysis and Synthesis ; Catalysts for Methane Reforming ; Carbon dioxide utilization in catalysis
Authors: Hoang Thanh Tuyen Tran | Shammi Sultana Nisha | Racim Radjef | Mostafa Nikzad | Robert Bjekovic | Bronwyn Fox
Source: Polymers (article, 2024-04-09)
Field: Materials Science — Polymers and Plastics

Recyclable and Biobased Vitrimers for Carbon Fibre-Reinforced Composites—A Review Economic and environmental concerns over the accumulation of end-of-life carbon fibre composite waste have led to increased attention to sustainable materials with low environmental impact. Over decades of research, vitrimers, a modern class of covalent adaptable networks, have bridged the gap between thermoplastics and thermosets. With the distinguishing feature of dynamic covalent bonds, vitrimers can be rearranged and reprocessed within their existing network structures in response to external stimuli such as heat or light. This poses a unique solution to repairing damaged composites, extending their service life, and reducing post-consumer waste. However, the synthesis of vitrimers often requires petrochemical consumption, which increases their carbon footprint. Using bio-based materials could be a promising solution to reduce the reliance on petrochemicals and their related pollution. This review compiles the contemporary requirements for bio-based vitrimers regarding their properties, scalability, and recycling features. This article also presents a comprehensive overview of the pathways to produce sustainable bio-based vitrimers and an overview of promising studies showing the potential uses of bio-derived vitrimers on carbon fibre composite productions. Petrochemical ; Carbon footprint ; Materials science ; Composite number ; Environmental pollution ; Environmental science ; Computer science ; Composite material ; Environmental protection ; Environmental engineering ; Greenhouse gas ; Ecology Polymer composites and self-healing ; biodegradable polymer synthesis and properties ; Lignin and Wood Chemistry
Authors: Riddhi Kumari Riddhi | Francesc Penas-Hidalgo | Hongmei Chen | Elsje Alessandra Quadrelli | J. Canivet | Caroline Mellot‐Draznieks | Albert Solé‐Daura
Source: Chemical Society Reviews (review, 2024-01-01)
Field: Chemistry — Organic Chemistry

Experimental and computational aspects of molecular frustrated Lewis pairs for CO<sub>2</sub> hydrogenation: en route for heterogeneous systems? Catalysis plays a crucial role in advancing sustainability. The unique reactivity of frustrated Lewis pairs (FLPs) is driving an ever-growing interest in the transition metal-free transformation of small molecules like CO<sub>2</sub> into valuable products. In this area, there is a recent growing incentive to heterogenize molecular FLPs into porous solids, merging the benefits of homogeneous and heterogeneous catalysis - high activity, selectivity, and recyclability. Despite the progress, challenges remain in preventing deactivation, poisoning, and simplifying catalyst-product separation. This review explores the expanding field of FLPs in catalysis, covering existing molecular FLPs for CO<sub>2</sub> hydrogenation and recent efforts to design heterogeneous porous systems from both experimental and theoretical perspectives. Section 2 discusses experimental examples of CO<sub>2</sub> hydrogenation by molecular FLPs, starting with stoichiometric reactions and advancing to catalytic ones. It then examines attempts to immobilize FLPs in porous matrices, including siliceous solids, metal-organic frameworks (MOFs), covalent organic frameworks, and disordered polymers, highlighting current limitations and challenges. Section 3 then reviews computational studies on the mechanistic details of CO<sub>2</sub> hydrogenation, focusing on H<sub>2</sub> splitting and hydride/proton transfer steps, summarizing efforts to establish structure-activity relationships. It also covers the computational aspects on grafting FLPs inside MOFs. Finally, Section 4 summarizes the main design principles established so far, while addressing the complexities of translating computational approaches into the experimental realm, particularly in heterogeneous systems. This section underscores the need to strengthen the dialogue between theoretical and experimental approaches in this field. Frustrated Lewis pair ; Chemistry ; Materials science ; Computer science ; Lewis acids and bases ; Catalysis ; Organic chemistry Organoboron and organosilicon chemistry ; Carbon dioxide utilization in catalysis ; Crystallography and molecular interactions
Authors: Vincent Ball
Source: Nanotechnology Reviews (article, 2024-01-01)
Field: Materials Science — Surfaces, Coatings and Films

Polydopamine films: Versatile but interface-dependent coatings Abstract Polydopamine coatings have been shown to allow to coat almost all materials with conformal films having a tunable thickness from a few up to more than 100 nm (and even more in some specific cases). These films are able to reduce metal cations, to be modified with many chemical moieties and advent hence as a “Holy Grail” in surface chemistry with an impressive amount of applicative papers published since 2007. However, the broad application field and ease of deposition from aqueous solutions hidden the complexity of the deposition mechanism(s). The discovery that polydopamine (PDA) films also form at air/water interfaces (in the absence of stirring or in stirring dependent manner) to yield membranes with physicochemical properties different than PDA films deposited at solid/water interfaces highlighted for the first time that the nature of the interfaces plays a major role in the PDA film growth mechanism and in the film properties. More recent research allowed to show that the surface chemistry of the used solid substrate modifies the composition of the thin deposited PDA film during the early stages of the deposition process with further deposition yielding to an almost substrate-independent PDA film. It is the aim of this review to describe complex surface effects occurring in PDA deposition and hence to complement other reviews which described the complexity of the chemistry yielding to PDA coatings. Deposition (geology) ; Nanotechnology ; Materials science ; Substrate (aquarium) ; Thin film ; Chemical engineering Polymer Surface Interaction Studies ; Dendrimers and Hyperbranched Polymers ; Electrospun Nanofibers in Biomedical Applications
Authors: Baoming Zhao | Tuan Liu | Mingen Fei | Cheng Hao | Brian J. Bliss | Yiding Cao | Jinwen Zhang
Source: Sustainable polymer & energy (article, 2024-01-01)
Field: Materials Science — Biomaterials

Biobased Vitrimers: A Sustainable Future Vitrimers are crosslinked polymers containing dynamic covalent linkages. Because of their crosslinked structure, they are stable as thermosets at their service temperatures. At high enough temperatures, dynamic exchange reactions occur and rearrange the polymer network, thus vitrimers become malleable and reprocessable like thermoplastics. The dynamic covalent bonds can also undergo dissociative cleavage reactions under specific conditions, so vitrimers are inherently degradable. To achieve a sustainable future, various biomass resources have been used as raw materials in vitrimer preparation. This review summarizes recent developments in biobased vitrimers and highlights their preparation methods. The limitations of current biobased vitrimers are also discussed. Business ; Environmental ethics ; Philosophy biodegradable polymer synthesis and properties ; RNA Interference and Gene Delivery
Authors: Gunchita Kaur Wadhwa | Dattatray J. Late | Shrikant Charhate | Shashi Bhushan Sankhyan
Source: ACS Omega (article, 2024-06-12)
Field: Materials Science — Materials Chemistry

1D and 2D Boron Nitride Nano Structures: A Critical Analysis for Emerging Applications in the Field of Nanocomposites Boron nitride (BN) with its 1D and 2D nano derivatives have gained immense popularity in both the field of research and applications. These nano derivatives have proved to be one of the most promising fillers which can be incorporated in polymers to form nanocomposites with excellent properties. These materials have been around for 25 years whereas significant research has been done in this field for only the past decade. There are many interesting properties which are imparted to the nanocomposites wherein thermal stability, large energy band gap, resistance to oxidation, excellent thermal conductivity, chemical inertness, and exceptional mechanical properties are just a few worthy of mention. Hexagonal boron nitride (h-BN) was selected as the parent material by most researchers reviewed in this paper through which 2D derivative Boron nitride nanosheets (BNNS) and 1D derivative Boron nitride nanotubes (BNNTs) are synthesized. This review will focus on the in-depth properties of h-BN and further will concisely focus on BNNS and BNNTs for their various properties. A detailed discussion of the addition of BNNS and BNNTs into polymers to form nanocomposites, their synthesis, properties, and applications is followed by a summary determining the most suitable synthesizing processes and the materials, keeping in mind the current challenges. Boron nitride ; Materials science ; Nanocomposite ; Nanotechnology ; Hexagonal boron nitride ; Nano- ; Thermal stability ; Nitride ; Composite material ; Chemistry ; Graphene ; Organic chemistry Graphene research and applications ; Boron and Carbon Nanomaterials Research ; Thermal properties of materials
Authors: Jackson Comes | Emir Islamovic | Carlos Lizandara‐Pueyo | Jong Seto
Source: Frontiers in Chemistry (review, 2024-10-03)
Field: Materials Science — Biomaterials

Improvements in the utilization of calcium carbonate in promoting sustainability and environmental health Calcium carbonate (CaCO<sub>3</sub>) is an incredibly abundant mineral on Earth, with over 90% of it being found in the lithosphere. To address the CO<sub>2</sub> crisis and combat ocean acidification, it is essential to produce more CaCO<sub>3</sub> using various synthetic methods. Additionally, this approach can serve as a substitute for energy-intensive processes like cement production. By doing so, we have the potential to not only reverse the damage caused by climate change but also protect biological ecosystems and the overall environment. The key lies in maximizing the utilization of CaCO<sub>3</sub> in various human activities, paving the way for a more sustainable future for our planet. Sustainability ; Calcium carbonate ; Carbonate ; Environmental science ; Calcium ; Chemistry ; Business ; Environmental chemistry ; Ecology ; Biology Calcium Carbonate Crystallization and Inhibition
Authors: Zichen Du | Fan Chen | Siyuan Fang | Xiaokun Yang | Yulu Ge | Kobi Shurtz | Hong‐Cai Zhou | Yun Hang Hu | Ying Li
Source: ES Energy & Environments (article, 2024-01-01)
Field: Materials Science — Materials Chemistry

Engineering Bimetallic Ni-Cu Nanoparticles Confined in MOF-Derived Nanocomposite for Efficient Dry Reforming of Methane To harness the potential of two significant greenhouse gases, CO2 and CH4, the dry reforming of methane (DRM) shows promise while generation of syngas (CO and H2). Ni-based catalysts have shown promising catalytic activities, but they experience significant deactivation due to coke deposition and metal aggregation. In this study, we employed a metal-organic framework (MOF)-templated synthesis of novel structured catalysts, i.e. bimetallic Ni-Cu nanoparticles confined in MOF-derived carbon/ZrO2 nanocomposite (NiCu/C/ZrO2(MD)). Alloying a small amount of Cu with Ni reduced the overall metal particle size, enhanced CO2 adsorption and conversion, and facilitated NiO reducibility to Ni. In addition, the catalyst offered nanoconfinement of Ni-Cu NPs by the MOF-derived C/tegragonal-ZrO2 framework, which provided a large surface area, featured strong metal-support interaction, and hindered the detrimental filamentous carbon deposition and metal aggregation during DRM process. As a result, the 9Ni1Cu/C/ZrO2(MD) catalyst with a Ni/Cu weight ratio of 9:1 delivered high and stable DRM activities over 100-h DRM, with average CO2 and CH4 conversions at 76% and 77%, respectively, and H2/CO molar ratio at 1.07. This DRM performance is among the top ones reported in the literature, and it is much higher than that of a ZrO2-supported bimetallic Ni-Cu catalyst prepared by direct calcination with the same Ni/Cu weight ratio, 9Ni1Cu/ZrO2(DC). This work demonstrates the importance of two advanced DRM catalyst structures, bimetallic NiCu alloying and nanoconfinement in porous catalytic carbon/ZrO2 support, the combination of which significantly promoted carbon management and enhanced DRM activities. Bimetallic strip ; Methane ; Nanocomposite ; Nanoparticle ; Carbon dioxide reforming ; Materials science ; Chemical engineering ; Catalysis ; Metallurgy ; Nanotechnology ; Syngas ; Chemistry ; Organic chemistry ; Metal ; Engineering Catalytic Processes in Materials Science ; Catalysts for Methane Reforming ; Catalysis and Oxidation Reactions
Authors: Beihang Yu | Boyce S. Chang | Whitney S. Loo | Scott Dhuey | Padraic O’Reilly | Paul D. Ashby | Michael D. Connolly | Grigory Tikhomirov | Ronald N. Zuckermann | Ricardo Ruiz
Source: ACS Nano (article, 2024-02-27)
Field: Materials Science — Surfaces, Coatings and Films

Nanopatterned Monolayers of Bioinspired, Sequence-Defined Polypeptoid Brushes for Semiconductor/Bio Interfaces The ability to control and manipulate semiconductor/bio interfaces is essential to enable biological nanofabrication pathways and bioelectronic devices. Traditional surface functionalization methods, such as self-assembled monolayers (SAMs), provide limited customization for these interfaces. Polymer brushes offer a wider range of chemistries, but choices that maintain compatibility with both lithographic patterning and biological systems are scarce. Here, we developed a class of bioinspired, sequence-defined polymers, i.e., polypeptoids, as tailored polymer brushes for surface modification of semiconductor substrates. Polypeptoids featuring a terminal hydroxyl (-OH) group are designed and synthesized for efficient melt grafting onto the native oxide layer of Si substrates, forming ultrathin (∼1 nm) monolayers. By programming monomer chemistry, our polypeptoid brush platform offers versatile surface modification, including adjustments to surface energy, passivation, preferential biomolecule attachment, and specific biomolecule binding. Importantly, the polypeptoid brush monolayers remain compatible with electron-beam lithographic patterning and retain their chemical characteristics even under harsh lithographic conditions. Electron-beam lithography is used over polypeptoid brushes to generate highly precise, binary nanoscale patterns with localized functionality for the selective immobilization (or passivation) of biomacromolecules, such as DNA origami or streptavidin, onto addressable arrays. This surface modification strategy with bioinspired, sequence-defined polypeptoid brushes enables monomer-level control over surface properties with a large parameter space of monomer chemistry and sequence and therefore is a highly versatile platform to precisely engineer semiconductor/bio interfaces for bioelectronics applications. Monolayer ; Semiconductor ; Nanotechnology ; Materials science ; Sequence (biology) ; Chemistry ; Optoelectronics Polymer Surface Interaction Studies ; Molecular Junctions and Nanostructures ; Nanofabrication and Lithography Techniques