jablonkagroup/rise_ai_scientists huggingface dataset:
Authors: Rabiul Awal | Nilufer Yesmin Tanisa | Md. Arifur Rahman | Shamim Ahmed
Source: Micro & Nano Letters (article, 2024-01-01)
Field: Materials Science — Materials Chemistry

Preparation of nanostructured cuprous oxide (Cu <sub>2</sub> O) absorber layer for photovoltaic application Abstract In this investigation, a nanostructured Cu 2 O thin film absorber layer is electrodeposited, exploring the impact of varying negative applied voltages and deposition time. Notably, the Cu 2 O thin film demonstrated optimal absorbance at −0.95 V, contrasting sharply with a minimum at −0.97 V. The authors' findings underscore that the peak absorbance was achieved at −0.95 V, coinciding with the lowest transmittance observed after 80 min of deposition, aligning with a maximal absorption coefficient of 21 × 10 3 cm −1 . At a deposition time of 5 min, the Cu 2 O thin film exhibited a noteworthy maximum Urbach energy of 2.00 eV and a minimum steepness parameter of 0.013. In contrast, the lowest Urbach energy was recorded at 0.34 eV, with the highest steepness parameter occurring at an applied voltage of 0.93 V. Furthermore, this study revealed a gradual increase in the refractive index with higher applied voltages, reaching its pinnacle at −1.5 V. These results collectively emphasize the nuanced interplay between applied voltage, deposition time and the optical properties of the nanostructured Cu 2 O thin film. The observed trends hold significant implications for optimizing the performance of thin film absorber layers, particularly in the context of enhancing absorbance and tailoring optical characteristics for specific applications. Absorbance ; Materials science ; Thin film ; Transmittance ; Deposition (geology) ; Layer (electronics) ; Absorption (acoustics) ; Voltage ; Refractive index ; Analytical Chemistry (journal) ; Context (archaeology) ; Optoelectronics ; Optics ; Nanotechnology ; Composite material ; Chemistry ; Physics Copper-based nanomaterials and applications ; ZnO doping and properties ; Quantum Dots Synthesis And Properties
Authors: Jingyao Zhang | Beibei Liu | Hongying Chen | Lingshu Zhang | Xia Jiang
Source: International Journal of Nanomedicine (review, 2024-07-01)
Field: Materials Science — Electronic, Optical and Magnetic Materials

Application and Method of Surface Plasmon Resonance Technology in the Preparation and Characterization of Biomedical Nanoparticle Materials Surface Plasmon Resonance (SPR) technology, as a powerful analytical tool, plays a crucial role in the preparation, performance evaluation, and biomedical applications of nanoparticles due to its real-time, label-free, and highly sensitive detection capabilities. In the nanoparticle preparation process, SPR technology can monitor synthesis reactions and surface modifications in real-time, optimizing preparation techniques and conditions. SPR enables precise measurement of interactions between nanoparticles and biomolecules, including binding affinities and kinetic parameters, thereby assessing nanoparticle performance. In biomedical applications, SPR technology is extensively used in the study of drug delivery systems, biomarker detection for disease diagnosis, and nanoparticle-biomolecule interactions. This paper reviews the latest advancements in SPR technology for nanoparticle preparation, performance evaluation, and biomedical applications, discussing its advantages and challenges in biomedical applications, and forecasting future development directions. Surface plasmon resonance ; Nanotechnology ; Nanoparticle ; Materials science ; Characterization (materials science) ; Biomolecule ; Drug delivery ; Nanomedicine ; Computer science Gold and Silver Nanoparticles Synthesis and Applications ; Advanced biosensing and bioanalysis techniques ; Nanoparticle-Based Drug Delivery
Authors: Elahe Mashhadi | Javad Safaei‐Ghomi
Source: Scientific Reports (article, 2024-01-27)
Field: Chemistry — Organic Chemistry

Sulfonated magnetic spirulina nanobiomaterial as a novel and environmentally friendly catalyst for the synthesis of dihydroquinazolin-4(1H)-ones in aqueous medium Spirulina algae is an excellent candidate for catalyst preparation due to its reactive functional groups, cost-effectiveness, widespread commercial accessibility, and biodegradability. In this study, magnetized Spirulina was used for the synthesis of dihydroquinazolin-4(1H)-ones (DHQZs) as catalyst. Magnetized Spirulina was produced by CoFe<sub>2</sub>O<sub>4</sub> and sulfonation method using chlorosulfonic acid to create the catalyst [CoFe<sub>2</sub>O<sub>4</sub>-Sp-SO<sub>3</sub>H]. It was affirmed by various techniques, including Fourier transform infrared (FT-IR), Vibrating sample magnetometry (VSM), Powder X-ray diffraction (XRD), Energy-dispersive X-ray spectroscopy (EDS), Thermogravimetric analysis (TGA), Transmission electron microscopy (TEM), Field emission scanning electron microscopy (FE-SEM), and elemental mapping techniques. DHQZs synthesis was accomplished through a concise one-pot, three-component reaction involving a range of diverse aldehydes, isatoic anhydride, and primary aromatic amine, within an aqueous medium. The method offers several advantages, including using green conditions, the generation of several new 2-furan-quinazolinone derivatives, chromatography-free purification, short reaction times, appropriate yield of product (75-96%), and catalyst recyclability. The proposed catalyst and water as solvent demonstrated a strong synergistic effect, leading to the prosperous synthesis of various novel dihydroquinazolinones at 60 °C. These numerous benefits make our approach highly attractive for academic research and industrial applications. Catalysis ; Thermogravimetric analysis ; Spirulina (dietary supplement) ; Aqueous solution ; Materials science ; Fourier transform infrared spectroscopy ; Green chemistry ; Nuclear chemistry ; Solvent ; Chemical engineering ; Chemistry ; Organic chemistry ; Reaction mechanism ; Raw material Quinazolinone synthesis and applications ; Multicomponent Synthesis of Heterocycles ; Microwave-Assisted Synthesis and Applications
Authors: Yihao Chen | Songtao Zhang | Yong Chen | Hongye Ding | Shiyi Yao | Yijian Tang | Ziming Qiu | Kun Xu | Yaxun Hu | Hao Gong | Yongbin Hu | Huan Pang
Source: Nano Research (article, 2024-06-01)
Field: Materials Science — Electronic, Optical and Magnetic Materials

A confined derivative strategy of core–shell SiO <sub>2</sub> coating metal-organic framework structures for supercapacitors Metal-organic framework-derived porous carbon has garnered extensive interest. However, MOFs will shrink inward during carbonization, which will limit the structural diversity and potential for application. In this work, a general synthesis strategy was reported. Various MOF@mSiO<sub>2</sub> core-shell composites were synthesized by in-situ growth, utilizing MOFs as precursors. Further, hollow mesoporous carbon was prepared after calcination by the outward contraction effect induced by compact silica coating. Furthermore, the incorporation of metal heteroatoms can also significantly enhance electrochemical performance due to the synergistic influences of bimetallic atoms. The synthesized Fe-Zn-N-MC-600 MOF-derived carbon material achieved 453 F g<sup>-1</sup> at 0.5 A g<sup>-1</sup> and an outstanding capacity retention rate (97% after 5000 cycles at 5 A g<sup>-1</sup>). In addition, the prepared Fe-Zn-N-MC-600//AC asymmetric supercapacitors achieved 375 F g<sup>-1</sup> at 5 A g<sup>-1</sup>. Our task opens a universal path for MOF-derived carbon, offering new possibilities in supercapacitor technology. Coating ; Supercapacitor ; Materials science ; Derivative (finance) ; Shell (structure) ; Core (optical fiber) ; Metal-organic framework ; Metal ; Nanotechnology ; Chemical engineering ; Composite material ; Capacitance ; Chemistry ; Organic chemistry ; Metallurgy ; Business ; Electrode ; Physical chemistry ; Engineering Supercapacitor Materials and Fabrication ; Metal-Organic Frameworks: Synthesis and Applications ; Carbon dioxide utilization in catalysis
Authors: Arif Budiman | Agus Rusdin | Yoga Windhu Wardhana | Lisa Efriani Puluhulawa | Faradila Ratu Cindana Mo’o | Nur Ain Thomas | Amirah Mohd Gazzali | Diah Lia Aulifa
Source: Antioxidants (review, 2024-08-01)
Field: Materials Science — Materials Chemistry

Exploring the Transformative Potential of Functionalized Mesoporous Silica in Enhancing Antioxidant Activity: A Comprehensive Review Antioxidants are essential for reducing oxidative stress, protecting cells from damage, and supporting overall well-being. Functionalized mesoporous silica materials have garnered interest due to their flexible uses in diverse domains, such as drug delivery systems. This review aims to thoroughly examine and evaluate the progress made in utilizing functionalized mesoporous silica materials as a possible approach to enhancing antioxidant activity. The authors performed a thorough search of reliable databases, including Scopus, PubMed, Google Scholar, and Clarivate Web of Science, using precise keywords linked to functionalized mesoporous silica nanoparticles and antioxidants. The identified journals serve as the major framework for the main discussion in this study. Functionalized mesoporous silica nanoparticles have been reported to greatly enhance antioxidant activity by allowing for an increased loading capacity, controlled release behavior, the targeting of specific drugs, improved biocompatibility and safety, and enhanced penetration. The results emphasize the significant capacity of functionalized mesoporous silica (FSM) to bring about profound changes in a wide range of applications. FSM materials can be designed as versatile nanocarriers, integrating intrinsic antioxidant capabilities and augmenting the efficacy of current drugs, offering substantial progress in antioxidant therapies and drug delivery systems, as well as enhanced substance properties in the pharmaceutical field. Functionalized mesoporous silica materials are a highly effective method for enhancing antioxidant activity. They provide new opportunities for the advancement of cutting-edge treatments and materials in the field of antioxidant research. The significant potential of FSM materials to change drug delivery methods and improve substance properties highlights their crucial role in future breakthroughs in the pharmaceutical field and antioxidant applications. Mesoporous silica ; Nanocarriers ; Nanotechnology ; Drug delivery ; Mesoporous material ; Biocompatibility ; Materials science ; Chemistry ; Organic chemistry Mesoporous Materials and Catalysis ; Advanced Nanomaterials in Catalysis ; Electrochemical sensors and biosensors
Authors: Yingxiang Zhai | Jian Li | Shujun Li | Tony D. James | Zhijun Chen
Source: Trends in Chemistry (article, 2024-11-27)
Field: Materials Science — Materials Chemistry

Photoluminescent materials from woody biomass resources Biomass (ecology) ; Woody plant ; Environmental science ; Materials science ; Business ; Agroforestry ; Ecology Luminescence and Fluorescent Materials ; Polydiacetylene-based materials and applications ; Photochromic and Fluorescence Chemistry
Authors: Yingxu Hu | Jinfeng Peng | Rui Liu | Jing Gao | Gongxue Hua | Xu-Bo Fan | Shengjie Wang
Source: Molecules (review, 2024-12-23)
Field: Materials Science — Materials Chemistry

Porphyrin-Based Supramolecular Self-Assemblies: Construction, Charge Separation and Transfer, Stability, and Application in Photocatalysis As a key means to solve energy and environmental problems, photocatalytic technology has made remarkable progress in recent years. Organic semiconductor materials offer structural diversity and tunable energy levels and thus attracted great attention. Among them, porphyrin and its derivatives show great potential in photocatalytic reactions and light therapy due to their unique large-π conjugation structure, high apparent quantum efficiency, tailorable functionality, and excellent biocompatibility. Compared to unassembled porphyrin molecules, supramolecular porphyrin assemblies facilitate the solar light absorption and improve the charge transfer and thus exhibit enhanced photocatalytic performance. Herein, the research progress of porphyrin-based supramolecular assemblies, including the construction, the regulation of charge separation and transfer, stability, and application in photocatalysis, was systematically reviewed. The construction strategy of porphyrin supramolecules, the mechanism of charge separation, and the intrinsic relationship of assembling structure-charge transfer-photocatalytic performance received special attention. Surfactants, peptide molecules, polymers, and metal ions were introduced to improve the stability of the porphyrin assemblies. Donor-acceptor structure and co-catalysts were incorporated to inhibit the recombination of the photoinduced charges. These increase the understanding of the porphyrin supramolecules and provide ideas for the design of high-performance porphyrin-based photocatalysts. Porphyrin ; Photocatalysis ; Supramolecular chemistry ; Photoinduced charge separation ; Materials science ; Photochemistry ; Nanotechnology ; Molecule ; Combinatorial chemistry ; Catalysis ; Artificial photosynthesis ; Chemistry ; Organic chemistry Porphyrin and Phthalocyanine Chemistry ; Advanced Photocatalysis Techniques ; Covalent Organic Framework Applications
Authors: Sen Chen | Shicheng Huang | Zhenglu Yang | Xian Suo | Huabin Xing | Xili Cui
Source: Small (article, 2024-04-28)
Field: Materials Science — Materials Chemistry

Precise Construction of Nitrogen‐Enriched Porous Ionic Polymers as Highly Efficient Sulfur Dioxide Adsorbent Porous ionic polymers with unique features have exhibited high performance in various applications. However, the fabrication of functional porous ionic polymers with custom functionality and porosity for efficient removal of low-concentration SO<sub>2</sub> remains challenging. Herein, a novel nitrogen-enriched porous ionic polymer NH<sub>2</sub>Py-PIP is prepared featuring high-content nitrogen sites (15.9 wt.%), adequate ionic sites (1.22 mmol g<sup>-1</sup>), and a hierarchical porous structure. The proposed construction pathway relies on a tailored nitrogen-functionalized cross-linker NH<sub>2</sub>Py, which effectively introduces abundant functional sites and improves the porosity of porous ionic polymers. NH<sub>2</sub>Py-PIP with a well-engineered SO<sub>2</sub>-affinity environment achieves excellent SO<sub>2</sub>/CO<sub>2</sub> selectivity (1165) and high SO<sub>2</sub> adsorption capacity (1.13 mmol g<sup>-1</sup> at 0.002 bar), as well as enables highly efficient and reversible dynamic separation performance. Modeling studies further elucidate that the nitrogen sites and bromide anions collaboratively promote preferential adsorption of SO<sub>2</sub>. The unique design in this work provides new insights into constructing functional porous ionic polymers for high-efficiency separations. Ionic bonding ; Adsorption ; Polymer ; Porosity ; Ionic liquid ; Chemical engineering ; Bromide ; Nitrogen ; Materials science ; Porous medium ; Inorganic chemistry ; Chemistry ; Organic chemistry ; Ion ; Catalysis Covalent Organic Framework Applications ; Metal-Organic Frameworks: Synthesis and Applications ; Industrial Gas Emission Control
Authors: Roshan Akdar Mohamed Yunus | Marcus Koch | Philippe Dieudonné-George | Domenico Truzzolillo | Ralph H. Colby | Daniele Parisi
Source: ACS Macro Letters (article, 2024-01-29)
Field: Materials Science — Biomaterials

Water-Driven Sol–Gel Transition in Native Cellulose/1-Ethyl-3-methylimidazolium Acetate Solutions The addition of water to native cellulose/1-ethyl-3-methylimidazolium acetate solutions catalyzes the formation of gels, where polymer chain-chain intermolecular associations act as cross-links. However, the relationship between water content (<i>W</i><sub>c</sub>), polymer concentration (<i>C</i><sub>p</sub>), and gel strength is still missing. This study provides the fundamentals to design water-induced gels. First, the sol-gel transition occurs exclusively in entangled solutions, while in unentangled ones, intramolecular associations hamper interchain cross-linking, preventing the gel formation. In entangled systems, the addition of water has a dual impact: at low water concentrations, the gel modulus is water-independent and controlled by entanglements. As water increases, more cross-links per chain than entanglements emerge, causing the modulus of the gel to scale as <i>G</i><sub>p</sub> ∼ <i>C</i><sub>p</sub><sup>2</sup><i>W</i><sub>c</sub><sup>3.0±0.2</sup>. Immersing the solutions in water yields hydrogels with noncrystalline, aggregate-rich structures. Such water-ionic liquid exchange is examined via Raman, FTIR, and WAXS. Our findings provide avenues for designing biogels with desired rheological properties. Polymer ; Intermolecular force ; Hydrogen bond ; Chemical engineering ; Materials science ; Rheology ; Intramolecular force ; Self-healing hydrogels ; Polymer chemistry ; Cellulose ; Organic chemistry ; Chemistry ; Composite material ; Molecule Advanced Cellulose Research Studies ; Polysaccharides Composition and Applications ; Hydrogels: synthesis, properties, applications
Authors: Dongmei Zhang | Jing Zhang | Xiangbing Bian | Peigen Zhang | Weihua Wu | Xudong Zuo
Source: Nanomaterials (review, 2024-12-28)
Field: Materials Science — Biomaterials

Iron Oxide Nanoparticle-Based T1 Contrast Agents for Magnetic Resonance Imaging: A Review This review highlights recent progress in utilizing iron oxide nanoparticles (IONPs) as a safer alternative to gadolinium-based contrast agents (GBCAs) for magnetic resonance imaging (MRI). It consolidates findings from multiple studies, discussing current T<sub>1</sub> contrast agents (CAs), the synthesis techniques for IONPs, the theoretical principles for designing IONP-based MRI CAs, and the key factors that impact their T<sub>1</sub> contrast efficacy, such as nanoparticle size, morphology, surface modifications, valence states, and oxygen vacancies. Furthermore, we summarize current strategies to achieve IONP-based responsive CAs, including self-assembly/disassembly and distance adjustment. This review also evaluates the biocompatibility, organ accumulation, and clearance pathways of IONPs for clinical applications. Finally, the challenges associated with the clinical translation of IONP-based T<sub>1</sub> CAs are included. Magnetic resonance imaging ; Nanoparticle ; Contrast (vision) ; Materials science ; Nuclear magnetic resonance ; Iron oxide nanoparticles ; Iron oxide ; Nanotechnology ; Contrast enhancement ; Medicine ; Radiology ; Optics ; Metallurgy ; Physics Nanoparticle-Based Drug Delivery ; Advanced MRI Techniques and Applications ; Lanthanide and Transition Metal Complexes
Authors: Katia Ait Kaci Azzou | Achour Terbouche | Chafia Ait Ramdane-Terbouche | Thierry Bataille | Didier Hauchard | Djillali Mezaoui
Source: Materials Chemistry and Physics (article, 2024-05-29)
Field: Materials Science — Electronic, Optical and Magnetic Materials

Supercapacitor electrode based on ternary activated carbon/CuCoO2 hybrid material Supercapacitor ; Ternary operation ; Activated carbon ; Materials science ; Electrode ; Carbon fibers ; Chemical engineering ; Capacitance ; Composite material ; Composite number ; Chemistry ; Computer science ; Organic chemistry ; Physical chemistry ; Engineering Supercapacitor Materials and Fabrication ; Electrocatalysts for Energy Conversion ; Electrochemical sensors and biosensors
Authors: Kübra Erden | Dilek Söyler | Alberto Barsella | Onur Şahın | Saniye Söylemez | Cagatay Dengiz
Source: The Journal of Organic Chemistry (article, 2024-09-10)
Field: Materials Science — Electronic, Optical and Magnetic Materials

Synthesis and Optical Characterization of Hydrazone-Substituted Push–Pull-Type NLOphores Two distinct families of NLOphores featuring hydrazone donors were synthesized using click-type [2 + 2] cycloaddition retroelectrocyclizations (CA-RE). Despite the limitations in the substrate scope, it was shown for the first time that hydrazone-activated alkynes could undergo reactions with TCNE/TCNQ. The electrochemical, photophysical, and second-order nonlinear optical (NLO) characteristics of the chromophores were analyzed utilizing experimental and computational approaches. Chromophores <b>17</b>-<b>21</b> and <b>23</b>-<b>27</b> exhibited two reduction waves, along with one oxidation wave that can be attributed to the hydrazone moiety. All chromophores exhibit charge-transfer bands extending from the visible to the near-infrared region. The λ<sub>max</sub> of hydrazone-based chromophores falls within the range of 473 to 725 nm. Additionally, all chromophores exhibited positive solvatochromism. Computational studies have been performed to elucidate the origin of the low-energy absorption bands. Parameters such as dipole moment, band gaps, electronegativity, global chemical hardness/softness, average polarizability, and first hyperpolarizability were calculated to obtain information about NLO properties of the target structures. The thermal stabilities of the NLOphores were assessed through TGA. Experimental NLO measurements were conducted using the electric field-induced second harmonic generation (EFISHG) technique. The studied structures demonstrated NLO responses, with μβ values between 520 × 10<sup>-48</sup> esu and 5300 × 10<sup>-48</sup> esu. Hydrazone ; Chromophore ; Cycloaddition ; Nonlinear optical ; Scope (computer science) ; Chemistry ; Combinatorial chemistry ; Electrochemistry ; Materials science ; Photochemistry ; Stereochemistry ; Nonlinear system ; Computer science ; Organic chemistry ; Catalysis ; Physical chemistry ; Physics ; Electrode Nonlinear Optical Materials Research ; Synthesis and biological activity ; Photochromic and Fluorescence Chemistry
Authors: C. L. Folcia | J. Ortega | Teresa Sierra | Alejandro Martínez‐Bueno | J. Etxebarría
Source: Giant (article, 2024-06-28)
Field: Materials Science — Electronic, Optical and Magnetic Materials

Chiral ferroelectric nematic liquid crystals as materials for versatile laser devices We present a liquid-crystal laser device based on the chiral ferroelectric nematic phase (N F *). The laser medium is obtained by mixing a ferroelectric nematic material with a chiral agent and a small proportion of a fluorescent dye. Notably, in the N F * phase very low electric fields perpendicular to the helical axis are able to reorient the molecules, giving rise to a periodic structure whose director profile is not single harmonic but contains the contribution of various Fourier components. This feature induces the appearance of several photonic bandgaps whose spectral ranges depend on the field, which can be exploited to build tunable laser devices. Here we report the characterization of home-made N F * lasers that can be tunable under low electric fields and present laser action in two of the photonic bands of the material. The obtained results open a promising route for the design of new and more versatile liquid-crystal based lasers. Liquid crystal ; Ferroelectricity ; Materials science ; Laser ; Optoelectronics ; Optics ; Dielectric ; Physics Liquid Crystal Research Advancements ; Photonic Crystals and Applications ; Photonic and Optical Devices