jablonkagroup/rise_ai_scientists huggingface dataset:
Authors: Wafaa Azouzi | Ikram Boulahya | Robert Jérôme | Ahmed Essyed | Abdelfattah Mahmoud | Ahmed Al-Shami | Dris Ihiawakrim | H. Labrim | Mohammed Benaïssa
Source: Ultrasonics Sonochemistry (article, 2024-10-19)
Field: Materials Science — Materials Chemistry

Ultrasonic chemical synthesis of zinc-manganese ferrites with improved magnetic properties Zinc-Manganese spinel ferrites (Zn<sub>1-x</sub>Mn<sub>x</sub>Fe<sub>2</sub>O<sub>4</sub>) are nowadays very attractive magnetic materials for cancer diagnostic and therapy. With the help of intense ultrasonic waves, sonochemical synthesis method was used to prepare stoichiometric and chemically homogenous nanoparticles by varying the manganese content. The crystal structure along with the size and shape of the as-prepared nanoparticles were described using XRD, TEM and FT-IR techniques, while cations distribution was carefully investigated using XPS and Mössbauer spectroscopic techniques and supported with density functional theory calculations. The crystal structure study revealed the presence of a pure single cubic spinel phase, where the unit-cell and the size were observed to decrease as the manganese incorporation was increased with clear indication of cationic redistribution and degree of inversion variations. Due to the very small variation of the total energy between different configurations, the probability of formation of a mixed phase was found to be very high in such a way that the more mixed was the phase, the more stable it was. A relevant fact was the noticed quasi-systematic ionic exchange made possible by the very short reaction times and high energy offered by the ultrasonic waves. For manganese concentrations up to 60%, the systematic ionic process started by incorporating manganese ions into octahedral sites and pushing iron ions to migrate and replace those of zinc in tetrahedral sites. Such an ionic movement was of central importance for the improvement of the magnetic properties due to the establishment of super-exchange interactions. Such an ionic engineering should definitely open the way to promising applications in biomedical imaging. Manganese ; Zinc ; Ultrasonic sensor ; Materials science ; Chemical synthesis ; Chemistry ; Inorganic chemistry ; Chemical engineering ; Metallurgy Magnetic Properties and Synthesis of Ferrites ; Iron oxide chemistry and applications ; Multiferroics and related materials
Authors: Baidong Wu | James N. Monks | Liyang Yue | Andrew Hurst | Zengbo Wang
Source: Photonics (article, 2024-05-10)
Field: Materials Science — Electronic, Optical and Magnetic Materials

Optimized Wide-Angle Metamaterial Edge Filters: Enhanced Performance with Multi-Layer Designs and Anti-Reflection Coatings This study presents a systematic optimization of wide-angle metamaterial long-pass (LP) edge filters based on silicon nanospheres (SiNP). Multi-layered configurations incorporating SiNP-meta-films and anti-reflection coating (ARC) elements not previously considered in the literature are explored to enhance their filter performance in both stop and pass bands. This research has successfully developed an accurate model for the effective refractive index using Kramers–Kronig relations, enabling the use of classical thin-film design software for rapid device performance optimization, which is verified by full-wave numerical software. This systematic optimization has produced highly efficient, near-shift-free long-pass metamaterial filters, evidenced by their high optical density (OD = 2.55) and low spectral shift across a wide angular range (0°–60°). These advancements herald the development of high-efficiency metamaterial optical components suitable for a variety of applications that require a consistent performance across diverse angles of incidence. Materials science ; Metamaterial ; Reflection (computer programming) ; Enhanced Data Rates for GSM Evolution ; Optics ; Layer (electronics) ; Optoelectronics ; Optical filter ; Computer science ; Composite material ; Telecommunications ; Physics Metamaterials and Metasurfaces Applications ; Advanced Antenna and Metasurface Technologies ; Microwave Engineering and Waveguides
Authors: Mohamed S. Hodhod | Abdel‐Rhman Z. Gaafar | Bandar M. AlMunqedhi | Abdalla Elzein | Abdelmalik M. Abdelmalik
Source: Open Chemistry (article, 2024-01-01)
Field: Materials Science — Materials Chemistry

Exploitation of mangliculous marine fungi, <i>Amarenographium solium</i>, for the green synthesis of silver nanoparticles and their activity against multiple drug-resistant bacteria Abstract The green synthesis pathway for silver nanoparticles (AgNPs) used in bacterial treatment is regarded as crucial because of its cost-effectiveness, nontoxicity, and eco-friendliness. During the present work, the mangliculous marine fungi Amarenographium solium isolated from the Arabian Gulf Coast of Saudi Arabia were utilized for the synthesis of AgNP, through the bio-reduction of aqueous silver nitrate (AgNO 3 ) solution. The success in AgNP synthesis was visually identified by the development of dark brown color in the cell-free filtrate and was further confirmed by ultraviolet–visible spectroscopy, which showed a peak at 425 nm. The AgNPs produced were further characterized using X-ray diffraction data analysis that proved the bioreduction of silver to 20 nm, and transmission electron microscopy revealed the formation of well-dispersed spherical nanoparticles with an average mean size of 12 nm. The optimization reaction parameters of temperature, pH, and metal salt concentration were carried out and resulted in a combination of 30°C, 7 and 1.5 mM, respectively, for rapid and maximum yield production. The antibacterial activity of the produced nanoparticles was evaluated using the two-fold microdilution method and showed a minimum inhibitory concentration of 9.375 μg/mL of AgNP against multiple drug-resistant bacterial strains. Bacteria ; Silver nanoparticle ; Nanotechnology ; Marine fungi ; Microbiology ; Nanoparticle ; Biology ; Ecology ; Materials science Nanoparticles: synthesis and applications ; Medicinal Plants and Neuroprotection ; Graphene and Nanomaterials Applications
Authors: Lauren Fields | Nhu Q. Vu | Tina C. Dang | Hsu-Ching Yen | M Ma | Wenxin Wu | Mitchell Gray | Lingjun Li
Source: Journal of Proteome Research (article, 2024-03-01)
Field: Chemistry — Spectroscopy

EndoGenius: Optimized Neuropeptide Identification from Mass Spectrometry Datasets Neuropeptides represent a unique class of signaling molecules that have garnered much attention but require special consideration when identifications are gleaned from mass spectra. With highly variable sequence lengths, neuropeptides must be analyzed in their endogenous state. Further, neuropeptides share great homology within families, differing by as little as a single amino acid residue, complicating even routine analyses and necessitating optimized computational strategies for confident and accurate identifications. We present EndoGenius, a database searching strategy designed specifically for elucidating neuropeptide identifications from mass spectra by leveraging optimized peptide-spectrum matching approaches, an expansive motif database, and a novel scoring algorithm to achieve broader representation of the neuropeptidome and minimize reidentification. This work describes an algorithm capable of reporting more neuropeptide identifications at 1% false-discovery rate than alternative software in five <i>Callinectes sapidus</i> neuronal tissue types. Neuropeptide ; Expansive ; Computational biology ; Computer science ; Mass spectrometry ; Database search engine ; Software ; Data mining ; Biology ; Chemistry ; Biochemistry ; Information retrieval ; Chromatography ; Programming language ; Physics Mass Spectrometry Techniques and Applications ; Receptor Mechanisms and Signaling ; Neuropeptides and Animal Physiology
Authors: Na-Kyoung Yang | Yoo-Kyum Shin | Saeyoung Park | Sang‐Min Kim | Bonjae Koo | Joonsoo Jeong | Min‐Ho Seo
Source: Micro and Nano Systems Letters (article, 2024-02-27)
Field: Materials Science — Materials Chemistry

Exploring graphene structure, material properties, and electrochemical characteristics through laser-induced temperature analysis Abstract Laser-induced graphene (LIG) is a three-dimensional graphene structure fabricated through the irradiation of a polymer substrate with laser energy (or fluence, equivalently). This methodology offers a cost-effective and facile means of producing 3D nanostructures, yielding graphene materials characterized by extremely high surface area and superior electrical properties, rendering them advantageous for various electrochemical applications. Nonetheless, it is imperative to acknowledge that the structures and material properties of LIG are subject to substantial variations contingent upon processing parameters, thereby underscoring the necessity for systematic inquiry and systematic comprehension of processing conditions, such as fluence and multi-passing, and resultant outcomes. Herein, we explored the impact of different laser fluence levels on the structural and material properties of LIG. We, especially, focused on how laser fluence affected substrate temperature and found that it caused polyimide (PI) substrate pyrolysis, resulting in changes in 3D structures and material density to LIG properties. We also investigated the effects of a multi-passing process on 3D LIG structures and material qualities, varying fluences, and temperature fluctuations. Lastly, we assessed electrochemical properties using LIGs produced under different conditions as working electrodes, leading to distinct impedance profiles and cyclic voltammetry (CV) curves. These variations were linked to the unique structural and material characteristics of the LIG samples. Graphene ; Materials science ; Electrochemistry ; Laser ; Optoelectronics ; Engineering physics ; Nanotechnology ; Optics ; Electrode ; Engineering ; Chemistry ; Physics ; Physical chemistry Graphene research and applications ; Diamond and Carbon-based Materials Research ; Nanowire Synthesis and Applications
Authors: Rohit Kumar | Anurag Kumar | Dharmendra Kumar | Sneha Yadav | Neeraj Kumar Shrivastava | Jyoti Singh | Archana Bharti Sonkar | Pratibha Verma | Dilip Kumar Arya | Gaurav Kaithwas | Ashish Kumar Agrarwal | Sanjay Singh
Source: Pharmaceutics (article, 2024-07-09)
Field: Materials Science — Biomaterials

Harnessing Potential of ω-3 Polyunsaturated Fatty Acid with Nanotechnology for Enhanced Breast Cancer Therapy: A Comprehensive Investigation into ALA-Based Liposomal PTX Delivery Our hypothesis posited that incorporating alpha-linolenic acid (ALA) into liposomes containing Paclitaxel (PTX) could augment cellular uptake, decrease the therapeutic dosage, and alleviate PTX-related side effects. Our investigation encompassed characterization of the liposomal formulation, encompassing aspects like particle size, surface morphology, chemical structure, drug release kinetics, and stability. Compatibility studies were performed through Fourier transform infrared spectroscopy (FTIR). By utilizing the Box-Behnken design (BBD), we developed ALA-based liposomes with satisfactory particle size and entrapment efficiency. It is noteworthy that ALA incorporation led to a slight increase in particle size but did not notably affect drug entrapment. In vitro drug release assessments unveiled a sustained release pattern, with ALA-PTX liposomes demonstrating release profiles comparable to PTX liposomes. Morphological examinations confirmed the spherical structure of the liposomes, indicating that substituting ALA with phosphatidylcholine did not alter the physicochemical properties. Cellular uptake investigations showcased enhanced uptake of ALA-based liposomes in contrast to PTX liposomes, likely attributed to the heightened fluidity conferred by ALA. Efficacy against MCF-7 cells demonstrated concentration-dependent reductions in cell viability, with ALA-PTX liposomes exhibiting the lowest IC50 value. Morphological analysis confirmed apoptotic changes in cells treated with all formulations, with ALA-PTX liposomes eliciting more pronounced changes, indicative of enhanced anticancer efficacy. Liposome ; Drug delivery ; Particle size ; Phosphatidylcholine ; Chemistry ; Biophysics ; Paclitaxel ; Pharmacology ; Drug carrier ; Biochemistry ; Phospholipid ; Biology ; Medicine ; Membrane ; Organic chemistry ; Chemotherapy ; Surgery Nanoparticle-Based Drug Delivery ; Advanced NMR Techniques and Applications ; Dendrimers and Hyperbranched Polymers
Authors: Shyamashis Das | Biswajit Bhattacharyya | Ashutosh Mohanty | P. K. Mukherjee | A. K. Mukherjee | Anirban Dutta | Anshu Pandey | Priya Mahadevan | Ranjani Viswanatha | D. D. Sarma
Source: Nanoscale (article, 2024-11-07)
Field: Materials Science — Materials Chemistry

Boosting quantum efficiency and suppressing self-absorption in CdS quantum dots through interface engineering Applications of photoluminescence (PL) from semiconductor quantum dots (QDs) have faced the dichotomy of excitonic emission being susceptible to self-absorption and shallow defects reducing quantum yield (QY) catastrophically, and doped emissions sacrificing the tunability of the emission wavelength <i>via</i> a quantum size effect, making it extremely challenging, if not impossible, to optimize all desirable properties simultaneously. Here we report a strategy that simultaneously optimizes all desirable PL properties in CdS QDs by leveraging interface engineering through the growth of two crystallographic phases, namely wurtzite and zinc blende phases, within individual QDs. These engineered interfaces result in sub-bandgap emissions <i>via</i> ultrafast energy transfer (∼780 fs) from band-edge states to interface states protected from surface defects, enhancing stability and prolonging the PL lifetime. These sub-bandgap emissions involving the interface states show a high Stokes shift, significantly reducing self-absorption while achieving near-ideal quantum efficiencies (> 90%); we also achieved extensive emission tunability by controlling the QD size without sacrificing efficiency. Theoretical calculations confirm that the interface states act as planar antennas for an efficient energy transfer from the bandgap states, while the extended nature of these states imparts tunability <i>via</i> quantum confinement effects, underpinning remarkable optical performance. This interface-engineered approach offers a powerful strategy to overcome limitations in QD-based optoelectronic applications. Quantum dot ; Photoluminescence ; Boosting (machine learning) ; Materials science ; Interface (matter) ; Absorption (acoustics) ; Optoelectronics ; Electro-absorption modulator ; Semiconductor ; Quantum ; Ideal (ethics) ; Nanotechnology ; Quantum dot laser ; Computer science ; Physics ; Quantum mechanics ; Semiconductor laser theory ; Composite material Quantum Dots Synthesis And Properties ; Chalcogenide Semiconductor Thin Films ; Nanowire Synthesis and Applications
Authors: Mahmoud Ebrahimi | Bangcai Luo | Qudong Wang | Shokouh Attarilar
Source: Materials (review, 2024-08-12)
Field: Materials Science — Materials Chemistry

Enhanced Multifaceted Properties of Nanoscale Metallic Multilayer Composites This study explored the fascinating field of high-performance nanoscale metallic multilayer composites, focusing on their magnetic, optical, and radiation tolerance properties, as well as their thermal and electrical properties. In general, nanoscale metallic multilayer composites have a wide range of outstanding properties, which differ greatly from those observed in monolithic films. Their exceptional properties are primarily due to the large number of interfaces and nanoscale layer thicknesses. Through a comprehensive review of existing literature and experimental data, this paper highlights the remarkable performance enhancements achieved by the precise control of layer thicknesses and interfaces in these composites. Furthermore, it will discuss the underlying mechanisms responsible for their exceptional properties and provide insights into future research directions in this rapidly evolving field. Many studies have investigated these materials, focusing on their magnetic, mechanical, optical, or radiation-tolerance properties. This paper summarizes the findings in each area, including a description of the general attributes, the adopted synthesis methods, and the most common characterization techniques used. The paper also covers related experimental data, as well as existing and promising applications. The paper also covers other phenomena of interest, such as thermal stability studies, self-propagating reactions, and the progression from nanomultilayers to amorphous and/or crystalline alloys. Finally, the paper discusses challenges and future perspectives relating to nanomaterials. Overall, this paper is a valuable resource for researchers and engineers interested in harnessing the full potential of nanoscale metallic multilayer composites for advanced technological applications. Materials science ; Nanoscopic scale ; Characterization (materials science) ; Nanotechnology ; Nanomaterials ; Amorphous solid ; Field (mathematics) ; Thermal stability ; Composite material ; Engineering physics ; Engineering ZnO doping and properties ; Graphene research and applications ; Copper-based nanomaterials and applications
Authors: Sindisiwe Jakalase | Azile Nqombolo | Edson L. Meyer | Mojeed A. Agoro | Nicholas Rono
Source: Nanomaterials (article, 2024-12-15)
Field: Materials Science — Materials Chemistry

A Numerical Simulation Study of the Impact of Kesterites Hole Transport Materials in Quantum Dot-Sensitized Solar Cells Using SCAPS-1D Energy generation and storage are critical challenges for developing economies due to rising populations and limited access to clean energy resources. Fossil fuels, commonly used for energy production, are costly and contribute to environmental pollution through greenhouse gas emissions. Quantum dot-sensitized solar cells (QDSSCs) offer a promising alternative due to their stability, low cost, and high-power conversion efficiency (PCE) compared to other third-generation solar cells. Kesterite materials, known for their excellent optoelectronic properties and chemical stability, have gained attention for their potential as hole transport layer (HTL) materials in solar cells. In this study, the SCAPS-1D numerical simulator was used to analyze a solar cell with the configuration FTO/TiO<sub>2</sub>/MoS<sub>2</sub>/HTL/Ag. The electron transport layer (ETL) used was titanium dioxide (TiO<sub>2</sub>), while Cu<sub>2</sub>FeSnS<sub>4</sub> (CFTS), Cu<sub>2</sub>ZnSnS<sub>4</sub> (CZTSe), Cu<sub>2</sub>NiSnS<sub>4</sub> (CNTS), and Cu<sub>2</sub>ZnSnSe<sub>4</sub> (CZTSSe) kesterite materials were evaluated as HTLs. MoS<sub>2</sub> quantum dot served as the absorber, with FTO as the anode and silver as the back metal contact. The CFTS material outperformed the others, yielding a PCE of 25.86%, a fill factor (FF) of 38.79%, a short-circuit current density (J<sub>SC</sub>) of 34.52 mA cm<sup>-2</sup>, and an open-circuit voltage (V<sub>OC</sub>) of 1.93 V. This study contributes to the advancement of high-performance QDSSCs. Quantum dot ; Materials science ; Anode ; Kesterite ; Energy conversion efficiency ; Nanotechnology ; Optoelectronics ; Solar cell ; Chemistry ; CZTS ; Electrode Quantum Dots Synthesis And Properties ; Chalcogenide Semiconductor Thin Films ; ZnO doping and properties
Authors: Tabrej Khan | N. Karthikeyan | Jesuarockiam Naveen | Suya Prem Anand | Tamer A. Sebaey
Source: Heliyon (review, 2024-08-01)
Field: Materials Science — Polymers and Plastics

Coconut (Cocos nucifera) sheath-based polymeric composites - A review The ever-burgeoning sustainable need for humanity to produce lighter, tougher, and more cost-effective materials has led to the development of biodegradable composites. Ever since their creation, natural fiber-based composites have found themselves ubiquitous. Due to their exceptional performance, Natural fiber-reinforced composites have been predominantly used in several engineering applications. Coconut leaf sheath (CLS) is an abundantly available agro-waste that can be easily extracted from the coconut tree. This review investigates the potential of incorporating coconut sheath into polymeric matrices. Also, the effects of surface treatments, synthetic fiber hybridization, and nanofiller-modified matrices were analyzed in detail. It has been observed that surface modification of coconut sheath, hybridization with other natural or synthetic fibers, and nanofiller-modified polymeric composites exhibit better mechanical performance compared to monolithic coconut sheath-based polymeric composites. One of the key advantages of hybrid composites is that they can combine the strengths of different constituents to overcome their individual limitations. Moreover, coconut sheath-based hybrid composites enhance the composites' damage tolerance and reduce the material cost. Cocos nucifera ; Composite material ; Materials science ; Fiber ; Natural fiber ; Surface modification ; Mechanical engineering Natural Fiber Reinforced Composites ; Nanocomposite Films for Food Packaging ; Electrospun Nanofibers in Biomedical Applications
Authors: G. S. Agunbiade | Neema Rafizadeh | Ryan J. Scott | Hui Zhao
Source: Physical review. B./Physical review. B (article, 2024-01-11)
Field: Materials Science — Materials Chemistry

Transient absorption measurements of excitonic dynamics in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mn>3</mml:mn><mml:mi>R</mml:mi></mml:mrow><mml:mtext>−</mml:mtext><mml:msub><mml:mrow><mml:mi>MoS</mml:mi></mml:mrow><mml:mn>2</mml:mn></mml:msub></mml:math> The excitonic dynamics in ${\mathrm{MoS}}_{2}$ monolayer, bilayer, and bulk flakes with different stacking orders, namely $3R$ and $2H$, are investigated through transient absorption spectroscopy at room temperature. Samples are obtained by the mechanical exfoliation of bulk ${\mathrm{MoS}}_{2}$ crystals with $3R$ and $2H$ stacking orders. Photoluminescence spectroscopy is performed to characterize and compare the samples. Time-resolved differential reflection measurements reveal that monolayer flakes exfoliated from the $3R$ and $2H$ crystals exhibit similar exciton lifetimes of a few picoseconds. However, the exciton lifetime in the $3R$ bilayer flake is approximately 85 ps, about twice as long as that in the $2H$ bilayer. This prolonged exciton lifetime is attributed to the reduction of the electron-hole wavefunction overlap in the $3R$ bilayer due to the built-in polarization. Similarly, in bulk $3R$ ${\mathrm{MoS}}_{2}$, the exciton lifetime is around 220 ps, approximately twice as long as those in bulk $2H$ ${\mathrm{MoS}}_{2}$. The extension of the exciton lifetime in $3R$ transition metal dichalcogenides could be advantageous for their applications in optoelectronic devices. Exciton ; Materials science ; Picosecond ; Photoluminescence ; Bilayer ; Spectroscopy ; Ultrafast laser spectroscopy ; Absorption spectroscopy ; Monolayer ; Condensed matter physics ; Physics ; Optoelectronics ; Optics ; Chemistry ; Nanotechnology 2D Materials and Applications ; MXene and MAX Phase Materials ; Perovskite Materials and Applications