jablonkagroup/rise_ai_scientists huggingface dataset:
Authors: Simone Casadio | Angela Gondolini | Elisa Mercadelli | Alessandra Sanson
Source: Renewable and Sustainable Energy Reviews (article, 2024-06-01)
Field: Materials Science — Materials Chemistry

Advances and prospects in manufacturing of ceramic oxygen and hydrogen separation membranes Hydrogen and oxygen are considered essential gases for industrial processes. Hydrogen is the main candidate to store discontinuous electricity produced by renewable energy sources playing a crucial role in achieving the European Green Deal goals. Ceramic membranes can supply theoretically 100 % pure gases and can be directly applied to high-temperature plants (500–900 °C). This technology shows reduced production costs, higher chemical and thermal stability compared to the precious metal-based counterparts. Despite the recent progress, challenges linked to its production processes and performances for industrial applications remain to be addressed. This review aims to give a comprehensive overview of the most used techniques and new approaches regarding the manufacturing of the most performing asymmetric (porous-dense) ceramic membranes. Oxygen separation technology is based on well-established performing materials; tangible progress is expected considering a fine-tuning of the membrane microstructure and architecture. Hydrogen separation membranes show a lower degree of advancement than the oxygen ones, suggesting the need for new materials design. For both types of membranes, one of the key requirements for industrial applications remains the manufacturing process optimization to achieve increased gas permeability and reliable components on a mass-production scale. This review offers a critical vision of the membrane technology, emphasizing the opportunities and challenges of each manufacturing method and structure. New prospects and frontier of shaping for this technology are addressed. Membrane ; Ceramic ; Hydrogen ; Separation (statistics) ; Oxygen ; Materials science ; Engineering ; Air separation ; Chemical engineering ; Process engineering ; Chemistry ; Metallurgy ; Computer science ; Organic chemistry Advancements in Solid Oxide Fuel Cells ; Fuel Cells and Related Materials ; Chemical Looping and Thermochemical Processes
Authors: Kamil Witas | Shruthi S. Nair | Tamar Maisuradze | Linda Zedler | H.-G. Schmidt | Pablo Garcia-Porta | Alexandra Stefanie Jessica Rein | Tim Bolter | Sven Rau | Stephan Kupfer | Benjamin Dietzek‐Ivanšić | Dieter Sorsche
Source: Journal of the American Chemical Society (article, 2024-07-11)
Field: Materials Science — Electronic, Optical and Magnetic Materials

Beyond the First Coordination Sphere─Manipulating the Excited-State Landscape in Iron(II) Chromophores with Protons Molecular transition metal chromophores play a central role in light harvesting and energy conversion. Recently, earth-abundant transition-metal-based chromophores have begun to challenge the dominance of platinum group metal complexes in this area. However, the development of new chromophores with optimized photophysical properties is still limited by a lack of synthetic methods, especially with respect to heteroleptic complexes with functional ligands. Here, we demonstrate a facile and efficient method for the combination of strong-field carbenes with the functional 2,2'-bibenzimidazole ligand in a heteroleptic iron(II) chromophore complex. Our approach yields two isomers that differ predominantly in their excited-state lifetimes based on the symmetry of the ligand field. Deprotonation of both isomers leads to a significant red-shift of the metal-to-ligand charge transfer (MLCT) absorption and a shortening of excited-state lifetimes. Femtosecond transient absorption spectroscopy in combination with quantum chemical simulations and resonance Raman spectroscopy reveals the complex relationship between protonation and photophysical properties. Protonation is found to tip the balance between MLCT and metal-centered (MC) excited states in favor of the former. This study showcases the first example of fine-tuning of the excited-state landscape in an iron(II) chromophore through second-sphere manipulations and provides a new perspective to the challenge of excited-state optimizations in 3d transition metal chromophores. Chemistry ; Chromophore ; Excited state ; Coordination sphere ; Chemical physics ; State (computer science) ; Inner sphere electron transfer ; Photochemistry ; Crystallography ; Atomic physics ; Ion ; Crystal structure ; Organic chemistry ; Physics Magnetism in coordination complexes ; Lanthanide and Transition Metal Complexes ; Spectroscopy and Quantum Chemical Studies
Authors: Chang Liu | Yandong Han | Zhongshun Wang | Lin Zhang | Wensheng Yang
Source: Langmuir (article, 2024-06-05)
Field: Chemistry — Organic Chemistry

Preparation of (3-Aminopropyl)triethoxysilane-Modified Silica Particles with Tunable Isoelectric Point Silica particles modified with amino groups hold immense potential across diverse fields, owing to their distinctive properties. The widely adopted method of surface modification, utilizing (3-aminopropyl)triethoxysilane (APTES), facilitates the incorporation of amino-functional groups onto the silica surface, thereby creating sites for subsequent functionalization with other molecules. In this context, the ability to precisely tailor the surface properties of amino-functionalized silica particles is crucial for optimizing their performance in various applications. In this work, we systematically investigated the influence of the APTES concentration and water content on the density of amino groups grafted on the silica surface within an ethanol-water mixture. The rational control of hydrolysis and condensation of APTES enabled the precise regulation of the amino density on the silica surface, resulting in a notable shift in the isoelectric point from 2.9 to 9.2. Subsequently, we assembled amino-functionalized silica with different isoelectric points with gold nanoparticles to demonstrate their tunable ability as surface-enhanced Raman scattering (SERS) substrates. This controlled and tailored amino-functionalization process opens up new routes for fine-tuning the properties of silica particles, thereby expanding their utility across various applications in materials science, nanotechnology, and biomedicine. Triethoxysilane ; Surface modification ; Isoelectric point ; Bifunctional ; Materials science ; Chemical engineering ; Tetraethyl orthosilicate ; Context (archaeology) ; Raman scattering ; Nanotechnology ; Chemistry ; Organic chemistry ; Raman spectroscopy ; Catalysis ; Composite material Nanomaterials for catalytic reactions ; Gold and Silver Nanoparticles Synthesis and Applications ; Mesoporous Materials and Catalysis
Authors: Praeploy Chomkhuntod | Praphaiphon Phonsuksawang | Anurak Waehayee | Kamonwad Ngamchuea | Pawin Iamprasertkun | Santi Maensiri | Anuchit Ruangvittayanon | Theeranun Siritanon
Source: Journal of Energy Storage (article, 2024-03-25)
Field: Materials Science — Electronic, Optical and Magnetic Materials

Effect of solvent-dependent morphology on charge storage mechanism of NiCo2O4 for aqueous supercapacitors Supercapacitor ; Aqueous solution ; Mechanism (biology) ; Solvent ; Charge (physics) ; Morphology (biology) ; Chemical engineering ; Aqueous medium ; Chemistry ; Materials science ; Nanotechnology ; Electrochemistry ; Physics ; Organic chemistry ; Engineering ; Geology ; Physical chemistry Supercapacitor Materials and Fabrication ; Advanced battery technologies research ; Transition Metal Oxide Nanomaterials
Authors: Seema Rani | Subhabrata Das | Shumile Ahmed Siddiqui | Ayushi Jain | Daya Rani | Mansi Pahuja | Nikita Chaudhary | Mohd Afshan | Rishita Ghosh | Devansh Swadia | Sk Riyajuddin | Chandan Bera | Kaushik Ghosh
Source: ACS Applied Materials & Interfaces (article, 2024-05-14)
Field: Materials Science — Materials Chemistry

Harnessing Environmental Sensitivity in SnSe-Based Metal–Semiconductor–Metal Devices: Unveiling Negative Photoconductivity for Enhanced Photodetector Performance and Humidity Sensing The extreme sensitivity of 2D-layered materials to environmental adsorbates, which is typically seen as a challenge, is harnessed in this study to fine-tune the material properties. This work investigates the impact of environmental adsorbates on electrical properties by studying metal-semiconductor-metal (MSM) devices fabricated on CVD-synthesized SnSe flakes. The freshly prepared devices exhibit positive photoconductivity (PPC), whereas they gradually develop negative photoconductivity (NPC) after being exposed to an ambient environment for ∼1 day. While the photodetectors based on positive photoconductivity exhibit a responsivity and detectivity of 6.1 A/W and 5.06 × 10<sup>8</sup> Jones, the same for the negative photoconductivity-based photodetector reaches up to 36.3 A/W and 1.49 × 10<sup>9</sup> Jones, respectively. In addition, the noise-equivalent power of the NPC photodetector decreases by 300 times as compared to the PPC device, which implies a prominent detection capability of the NPC device against weak photo signals. To substantiate the hypothesis that negative photoconductivity stems from the photodesorption of water and oxygen molecules on the dangling bonds of SnSe flakes, the flakes are etched along the most active planes (010) with a focused laser beam in an inert environment, which enhances responsivity by 43%, supporting negative photoconductivity linked to photodesorption. Furthermore, the humidity-dependent dark current variation of the NPC photodetectors is used to design a humidity sensor for human respiration monitoring with faster response and recovery times of 0.72 and 0.68 s, respectively. These findings open up the possibility of tuning the photoelectrical response of layered materials in a facile manner to develop future sensors and optoelectronic multifunctional devices. Materials science ; Photodetector ; Photoconductivity ; Optoelectronics ; Semiconductor ; Sensitivity (control systems) ; Humidity ; Metal ; Nanotechnology ; Electronic engineering 2D Materials and Applications ; Nanowire Synthesis and Applications ; Gas Sensing Nanomaterials and Sensors
Authors: Zeyne Elomar | Andinet Kumella Eticha | Nurcan Doğan | Yasin Akgül | Cemhan Doğan
Source: Fibers and Polymers (article, 2024-06-04)
Field: Materials Science — Biomaterials

Tailoring of Gelatin-Chitosan Nanofibers Functionalized with Eucalyptus Essential Oil via Electroblowing for Potential Food Packaging and Wound Dressing Applications Abstract In recent years, new approaches to fabricating nanofiber networks for potential applications in wound dressing and food packaging have been in the spotlight. This study aimed to produce functional webs based on gelatin, chitosan, and eucalyptus essential oil using the electro-blowing method instead of traditional spinning methods such as electrospinning. The resultant nanofiber webs exhibit promising morphological characteristics, including reduced fiber diameters, enhanced air permeability, and improved thermal stability. The integration of chitosan and eucalyptus essential oil overcomes limitations associated with gelatin, offering enhanced mechanical properties, antibacterial efficacy, and potential attributes for wound healing and food packaging. The combination of gelatin and chitosan contributes to biodegradability and biocompatibility, crucial for developing materials compatible with the natural environment. The addition of eucalyptus essential oil provides an additional layer of antimicrobial protection, aligning with sustainability goals in wound care and active food packaging. A comprehensive analysis encompassing SEM morphologies, fiber diameters, air permeability, FTIR spectra, TGA thermograms, and contact angle measurements establishes a thorough understanding of the fabricated nanofiber webs’ characteristics. Despite the favorable properties exhibited by the developed nanofiber webs for wound healing and food packaging applications, the incorporation of eucalyptus essential oil resulted in a reduction in tensile strength and elongation ratios. This observation highlights the necessity for further optimization and fine-tuning of the formulation to strike a balance between antimicrobial benefits and mechanical properties. Distinguished by its unique combination of gelatin, chitosan, and eucalyptus essential oil, this research contributes to the advancement of nanofiber technology, expanding knowledge in the field and paving the way for the development of advanced materials with enhanced therapeutic properties for wound healing and food packaging. Graphical Abstract Gelatin ; Materials science ; Nanofiber ; Chitosan ; Electrospinning ; Food packaging ; Air permeability specific surface ; Biocompatibility ; Ultimate tensile strength ; Thermal stability ; Composite material ; Chemical engineering ; Polymer ; Layer (electronics) ; Organic chemistry ; Food science ; Chemistry Electrospun Nanofibers in Biomedical Applications ; Wound Healing and Treatments ; Nanocomposite Films for Food Packaging
Authors: Hiba Kassem | Emir H. Samat | Lucie Imbernon | Filip Du Prez
Source: Advanced Functional Materials (article, 2024-09-27)
Field: Materials Science — Polymers and Plastics

Foam‐to‐Foam Recycling Potential of PU‐Foams by Integration of Amino Esters Abstract The increasing market demand for flexible polyurethane foams (PUFs) is prompting the academic and industrial community to seek solutions for their end‐of‐life management. In this study, this issue is addressed by incorporating β‐amino ester (BAE) moieties into the foam structure. This addition results in flexible hybrid PU‐BAE foams that can be thermally reprocessed and chemically recycled, with cell sizes ranging from 780 to 990 µm and densities between 90 and 150 kg m −3 . These foams demonstrate thermomechanical reprocessability, yielding stable PU‐BAE elastomers, with glass transition temperature values ranging from 14 to 25 °C. Stress relaxation experiments reveal remarkably fast relaxation times for these hybrid elastomers (23 s at 160 °C). Furthermore, a systematic investigation of the chemical recyclability of these foams via glycosylation is conducted under mild conditions, achieving complete disintegration within 20 min at 65 °C. Finally, the chemically recycled product is converted into a foam again, achieving a closed loop foam‐to‐foam recycling process. These findings indicate that the integration of BAE into PUFs leads to an enhanced chemical recycling rate, providing a promising avenue for addressing end‐of‐life concerns in PUF‐applications. Materials science ; Metal foam ; Composite material ; Chemical engineering ; Polyurethane ; Polymer science ; Waste management ; Porosity ; Engineering Polymer composites and self-healing ; Carbon dioxide utilization in catalysis ; Catalysis and Hydrodesulfurization Studies
Authors: Nethmi De Alwis Watuthanthrige | Richard Whitfield | Simon Harrisson | Nghia P. Truong | Athina Anastasaki
Source: ACS Macro Letters (article, 2024-06-10)
Field: Materials Science — Biomaterials

Thermal Solution Depolymerization of RAFT Telechelic Polymers Thermal solution depolymerization is a promising low-temperature chemical recycling strategy enabling high monomer recovery from polymers made by controlled radical polymerization. However, current methodologies predominantly focus on the depolymerization of monofunctional polymers, limiting the material scope and depolymerization pathways. Herein, we report the depolymerization of telechelic polymers synthesized by RAFT polymerization. Notably, we observed a significant decrease in the molecular weight (<i>M</i><sub>n</sub>) of the polymers during monomer recovery, which contrasts the minimal <i>M</i><sub>n</sub> shift observed during the depolymerization of monofunctional polymers. Introducing Z groups at the center or both ends of the polymer resulted in distinct kinetic profiles, indicating partial depolymerization of the bifunctional polymers, as supported by mathematical modeling. Remarkably, telechelic polymers featuring R-terminal groups showed up to 68% improvement in overall depolymerization conversion compared to their monofunctional analogues, highlighting the potential of these materials in chemical recycling and the circular economy. Depolymerization ; Polymer ; Monomer ; Polymerization ; Polymer chemistry ; Bifunctional ; Raft ; Materials science ; Chemistry ; Organic chemistry ; Catalysis biodegradable polymer synthesis and properties ; Advanced Polymer Synthesis and Characterization ; Polymer Nanocomposites and Properties
Authors: Bin Lan | Jindong Xu | Lingyun Zhu | Xinyu Chen | Hideya Kono | Peihan Wang | Xin Zuo | Jianfeng Yan | Akiko Yagi | Yongshen Zheng | Songhua Chen | Yaofeng Yuan | Kenichiro Itami | Yuanming Li
Source: Precision Chemistry (article, 2024-03-13)
Field: Chemistry — Organic Chemistry

Side-Chain Type Ferrocene Macrocycles A class of side-chain type ferrocene macrocycles with a radially conjugated system is introduced in this study. The stereo configurations of these ferrocene rings were determined through single-crystal X-ray diffraction analysis. Notably, in the solid state, the ferrocene rings exhibit a distinctive herringbone stacking pattern imposed by a ferrocene-to-ring host-guest interaction. Through UV-vis absorption spectroscopy, electrochemical measurements, and theoretical calculations, valuable insights into the electronic properties of these rings were obtained. In addition, the single crystal of macrocycle <b>A</b> <sub><b>2</b></sub> <b>B</b> demonstrates a second-order nonlinear optical response. As a class of organometallic nanorings, this work holds great potential for further exploration in the fields of organometallic chemistry, molecular electronics, and host-guest chemistry. Ferrocene ; Crystallography ; Ring (chemistry) ; Stacking ; Conjugated system ; Chemistry ; Absorption spectroscopy ; Metallocene ; Materials science ; Nanotechnology ; Electrochemistry ; Organic chemistry ; Electrode ; Polymer ; Physics ; Physical chemistry ; Optics Synthesis and Properties of Aromatic Compounds ; Ferrocene Chemistry and Applications ; Organoboron and organosilicon chemistry
Authors: Jilong Han | Hanya Zhang | Yuheng Fan | Lilong Zhou | Zhikun Zhang | Pengfei Li | Zhengjie Li | Yongsheng Du | Qingfen Meng
Source: Molecules (article, 2024-04-03)
Field: Chemistry — Inorganic Chemistry

Progressive Insights into Metal-Organic Frameworks and Metal-Organic Framework-Membrane Composite Systems for Wastewater Management The sustainable management of wastewater through recycling and utilization stands as a pressing concern in the trajectory of societal advancement. Prioritizing the elimination of diverse organic contaminants is paramount in wastewater treatment, garnering significant attention from researchers worldwide. Emerging metal-organic framework materials (MOFs), bridging organic and inorganic attributes, have surfaced as novel adsorbents, showcasing pivotal potential in wastewater remediation. Nevertheless, challenges like limited water stability, elevated dissolution rates, and inadequate hydrophobicity persist in the context of wastewater treatment. To enhance the performance of MOFs, they can be modified through chemical or physical methods, and combined with membrane materials as additives to create membrane composite materials. These membrane composites, derived from MOFs, exhibit remarkable characteristics including enhanced porosity, adjustable pore dimensions, superior permeability, optimal conductivity, and robust water stability. Their ability to effectively sequester organic compounds has spurred significant research in this field. This paper introduces methods for enhancing the performance of MOFs and explores their potential applications in water treatment. It delves into the detailed design, synthesis strategies, and fabrication of composite membranes using MOFs. Furthermore, it focuses on the application prospects, challenges, and opportunities associated with MOF composite membranes in water treatment. Metal-organic framework ; Environmental remediation ; Wastewater ; Membrane ; Adsorption ; Materials science ; Water treatment ; Sewage treatment ; Context (archaeology) ; Waste management ; Composite number ; Porosity ; Nanotechnology ; Environmental science ; Engineering ; Composite material ; Chemistry ; Contamination ; Geology Metal-Organic Frameworks: Synthesis and Applications ; Membrane Separation Technologies ; Covalent Organic Framework Applications
Authors: Harjot Kaur | Samarjeet Singh Siwal | Reena V. Saini | Vijay Kumar Thakur
Source: ACS Omega (review, 2024-01-29)
Field: Materials Science — Materials Chemistry

Covalent–Organic Framework-Based Materials in Theranostic Applications: Insights into Their Advantages and Challenges Nanomedicine has been essential in bioimaging and cancer therapy in recent years. Nanoscale covalent-organic frameworks (COFs) have been growing as an adequate classification of biomedical nanomaterials with practical application prospects because of their increased porosity, functionality, and biocompatibility. The high sponginess of COFs enables the incorporation of distinct imaging and therapeutic mechanisms with a better loading efficiency. Nevertheless, preliminary biocompatibility limits their possibility for clinical translation. Thus, cutting-edge nanomaterials with high biocompatibility and improved therapeutic efficiency are highly expected to fast-track the clinical translation of nanomedicines. The inherent effects of nanoscale COFs, such as proper size, modular pore geometry and porosity, and specific postsynthetic transformation through simple organic changes, make them particularly appealing for prospective nanomedicines. The organic building blocks of COFs may also be postmodified for particular binding to biomarkers. The exceptional features of COFs cause them to be an encouraging nanocarrier for bioimaging and therapeutic applications. In this review, we have systematically discussed the advances of COFs in the field of theranostics by providing essential features of COFs along with their synthetic methods. Further, the applications of COFs in the field of theranostics (such as drug delivery systems, photothermal, and photodynamic therapy) are discussed in detail with the help of available literature to date. Furthermore, the advantages of COFs over other materials for therapeutics and drug delivery are discussed. Finally, the review concludes with potential future COF applications in the theranostic field. Nanotechnology ; Nanomedicine ; Nanocarriers ; Biocompatibility ; Drug delivery ; Materials science ; Computer science ; Nanoparticle Covalent Organic Framework Applications ; Metal-Organic Frameworks: Synthesis and Applications ; Advanced Photocatalysis Techniques