jablonkagroup/rise_ai_scientists huggingface dataset:
Authors: Bhaskar  Ghosh | R K Jain
Source: Journal of Scientific & Industrial Research (article, 2024-09-01)
Field: Materials Science — Materials Chemistry

Experimental Performance Evaluation of Shape Memory Alloy (SMA) Compliant Micro Gripper for Micro Assembly This study introduces an innovative design for a compliant micro gripper based on Shape Memory Alloy (SMA) technology, intended for micro-assembly applications where SMA wire is used as an active actuator for opening and closing the jaw of micro gripper and gripping the object because it has a flexible behavior with high strength and large defection. This SMA wire can achieve the active actuator property by shape-changing properties with temperature. To control the temperature, the mathematical modeling and electro-mechanical characterizations of SMA wire are carried out by applying Joule's heating law method for identifying shape-changing properties with temperature. An experimental testing setup is also developed for characterizations of SMA wire where the behavior of SMA wire is controlled by setting the control parameters using the Lab VIEW software. After testing the SMA wires, the key finding is that the SMA wire shows steady-state behavior. Further, an SMA-based compliant micro gripper is developed. This development demonstrates that SMA wire facilitate the opening and closing of the jaws during the handling of miniature objects which shows that this flexible SMA-based micro gripper can be utilized in futuristic micro-assembly applications. SMA* ; Shape-memory alloy ; Materials science ; Alloy ; Mechanical engineering ; Structural engineering ; Nanotechnology ; Composite material ; Computer science ; Engineering Shape Memory Alloy Transformations ; Topology Optimization in Engineering ; Piezoelectric Actuators and Control
Authors: Zhengcheng Yun | Jun Wei
Source: Frontiers in Nanotechnology (article, 2024-11-20)
Field: Materials Science — Materials Chemistry

Trends in the application of metal Nanobiomaterials in cancer therapy clinical trials Background Cancer is recognized as a major public health problem worldwide, which brings a large number of deaths and serious economic burden. Traditional cancer treatments generally have problems such as limited application, large side effects, and drug resistance. With the rise of nanomedicine technology, its unique advantages in precision drug delivery, imaging sensitivity, assisted drug release, and enhanced drug properties have brought new hope to cancer patients. These therapies, including photothermal therapy, drug delivery, and immunotherapy, use various nanoparticles such as gold and iron-oxide to improve targeted treatment and reduce side effects. The increasing interest in sustainable NP production and safety concerns has driven new research into biocompatible and eco-friendly methods. This study aims to analyze the current research status and global trends in cancer therapy using nanoparticles through a bibliometric analysis. Methods The Web of Science Core Collection database was searched for publications related to NP-based cancer therapies from January 1995 to December 2023. A bibliometric analysis was conducted using using Bibliometrix Online Analysis Platform, HistCite Pro 2.1, VOSviewer version 1.6.20 and RStudio version 4.3.1, covering metrics like the number of publications, citations, countries, institutions, journals, authors, references, and keywords. Results A total of 452 articles published in 233 journals. The number of publications on clinical cancer therapy with metal Nanomaterials has shown consistent annual growth. China and Chinese Academy of Sciences were the leading country and institution contributing to this field, respectively. The most prolific author was Zangeneh Mohammad Mahdi, and Biomaterials was the most prolific journal. Key research hotspots identified include keywords such as “gold nanoparticles”, “delivery”, “drug delivery,” “green synthesis,” and “cytotoxicity.” Conclusion This is one of the first studies to perform a bibliometric analysis and visualization of publications onclinical cancer therapy with metal Nanomaterials, offering valuable insights for researchers. Future studies should focus on enhancing the efficacy, biocompatibility, and sustainable synthesis of nanoparticles, with an emphasis on their use in personalized medicine and photodynamic therapy. Medicine ; Nanomedicine ; Drug delivery ; Cancer ; Clinical trial ; Cancer therapy ; Medical physics ; Nanotechnology ; Internal medicine ; Nanoparticle Nanoparticles: synthesis and applications ; Nanoplatforms for cancer theranostics ; Nanoparticle-Based Drug Delivery
Authors: Jiangke Tao | Di Liu | Zhichao Yu | Hui Pan
Source: Journal of Materials Chemistry A (article, 2024-01-01)
Field: Materials Science — Materials Chemistry

Enhanced reduction of CO to C<sub>2</sub> products on MoS<sub>2</sub> nanoribbons by edge engineering Engineering the edge of MoS 2 nanoribbons promotes selective CO reduction to C 2 products. Reduction (mathematics) ; Enhanced Data Rates for GSM Evolution ; Materials science ; Optoelectronics ; Engineering physics ; Physics ; Computer science ; Telecommunications ; Mathematics MXene and MAX Phase Materials ; Copper-based nanomaterials and applications ; Catalysis and Hydrodesulfurization Studies
Authors: Ahmad Yaser Alhaddad | Muni Raj Maurya | Mohamed Medhat Radwan | Usman Asghar | Kishor Kumar Sadasivuni | John‐John Cabibihan
Source: Discover Applied Sciences (article, 2024-07-31)
Field: Materials Science — Materials Chemistry

Characterization of water-controlled shape memory alloys for solar tracking applications Abstract Growing demands for cleaner energy sources lead to innovations that require investigations in solar energy harvesting. Though numerous organic and inorganic photovoltaic devices have been explored for the solar power conversion, achieving a high efficiency is still an open challenge for the researchers. In this context, an efficient, self-adjusting solar power panel coupled with low-cost and high reliability is of great significance and demand. In this study, we investigate the potential of Shape Memory Alloy (SMA) actuators for solar tracking applications. Three SMA configurations were considered containing one and up to three SMAs arranged in parallel. The temperature range for the displacement experiments was 40°–60°. Additionally, three levels of mass were used, namely, 500 g, 600 g, and 700 g. The displacement experiments revealed that the addition of more SMAs into the configuration provided a more consistent performance. The force experiment revealed that two-SMA configuration achieved 60% higher force production compared to the one-SMA configuration under the same conditions while the three-SMA configuration was 31% higher than in the two-SMA configuration and 110% compared to the one-SMA configuration. Additionally, the force hysteresis of the two-SMA setup was smaller and closer to that of single-SMA configuration. The two-SMA configuration force hysteresis exhibited a more linear trend as compared to that of the three-SMA configuration. The outcomes of this work highlight the potential of using SMAs as actuators in solar-powered applications and that optimization in terms of the needed number of SMAs is required to meet the displacement and/or force requirements. Characterization (materials science) ; Shape-memory alloy ; Materials science ; Tracking (education) ; Nanotechnology ; Computer science ; Optoelectronics ; Metallurgy ; Psychology Shape Memory Alloy Transformations ; Transition Metal Oxide Nanomaterials
Authors: Т. М. Сейлханов | Assel Ten | Khaidar S. Tassibekov | О. Т. Seilkhanov | Tolganay Zharkynbek | Bagila G. Tursynova | V. К. Yu
Source: Chemical Bulletin of Kazakh National University (article, 2024-10-08)
Field: Materials Science — Biomaterials

Supramolecular cyclodextrin complexes of biologically active nitrogen heterocycles The review is devoted to the rapidly developing field of modern supramolecular chemistry - cyclodextrin complexes of biologically active nitrogen heterocycles, such as piperidines, piperazines, morpholines and pyridines. Interest in cyclodextrin complexes is growing due to the search and construction of supramolecular assemblies for targeted drug delivery. The latter is achieved as a result of supramolecular self-assembly, based on the principles of molecular recognition, and is one of the areas of modern chemistry, leading to the creation of new materials with new properties. This review fully demonstrates the ongoing scientific and practical interest in the problem of encapsulation with cyclodextrins, including nanoencapsulation. Encapsulation with cyclodextrins provides a wide range of advantages: obtaining solid dosage forms from liquid ones, stabilizing and protecting active substances from the adverse effects of external factors, increasing solubility, increasing bioavailability, reducing toxicity, prolonging action, etc. The presented review includes recent advances in the field of supramolecular complexes of biologically active nitrogen heterocycles with cyclodextrins and concludes with a discussion and identification of future promising directions for research. The review presents the results of supramolecular self-assembly of biologically active azaheterocycles with cyclodextrins. Cyclodextrin ; Supramolecular chemistry ; Chemistry ; Nitrogen ; Combinatorial chemistry ; Environmental chemistry ; Organic chemistry ; Molecule Nanoparticle-Based Drug Delivery
Authors: Isabel C. Gouveia | Claúdia Mouro
Source: IntechOpen eBooks (review, 2024-01-17)
Field: Materials Science — Biomaterials

Development of Drug-Delivery Textiles Using Different Electrospinning Techniques: A Review Electrospinning, a remarkable and versatile technique has been related to medical textiles, aiming to produce nanomaterials for drug delivery and tissue regeneration applications. Furthermore, electrospun nanofibrous materials with unique properties as favorable pore size distribution, porosity, surface area, and wettability, along with effective mechanical properties, are the frontrunner solutions. Also, the features of the nanofibrous structures can be designed and optimized by controlling electrospinning parameters related to the solution properties, the setup parameters, and the environmental conditions to design nanofibrous textile materials for the desired applications. Further, to accomplish the required functionality of the drug-delivery systems, a rather broad range of drugs have been loaded into the nanofibers using different electrospinning techniques, namely the blending, side-by-side, coaxial, tri-axial, emulsion, and multi-needle electrospinning, in order to accomplish specific drug-release profiles of the designed nanofibrous textiles. Thus, this chapter describes the different electrospinning techniques that have been utilized in the production of the textile nanofibrous materials as the application of these materials in bone, nerve, periodontal, and vascular regeneration, as well as in wound dressings, personal-protective-equipment (PPE), and cancer treatment, providing an overview of the recent studies and highlighting the current challenges and future perspectives for their medical applications. Electrospinning ; Materials science ; Drug delivery ; Nanofiber ; Textile ; Nanotechnology ; Emulsion ; Composite material ; Polymer ; Engineering ; Chemical engineering Electrospun Nanofibers in Biomedical Applications ; Advanced Sensor and Energy Harvesting Materials ; Tissue Engineering and Regenerative Medicine
Authors: Rasha M. Kamel
Source: Journal of Fluorescence (article, 2024-03-08)
Field: Chemistry — Analytical Chemistry

Fabrication of Luminescent Microtiterplate Using Terbium Complex for Phenol Screening in Seawater Samples Tb(III)-2-aminoterphthalate complex Tb<sub>2</sub>-(ATPh)<sub>3</sub> was synthesized and characterized using FT-IR, thermal analysis and elemental analysis. Tb<sub>2</sub>(ATPh)<sub>3</sub> microtiter plate was fabricated through embedding Tb(III) complex in polyvinyl chloride membrane and used for environmental determination of phenol in sea water samples. The calculated detection (D<sub>L</sub>), quantification (Q<sub>L</sub>) limits, and binding constant (K<sub>D</sub>) were 00.63 µmol L<sup>- 1</sup>, 2.10 µmol L<sup>- 1</sup> and 1.32 × 10<sup>4</sup> mol<sup>- 1</sup> L, respectively. The fabricated microtiter plates exhibited high selectivity towards phenol over other hydrocarbon compounds. Furthermore, AGREE metric tool was used to assess the method's green nature as well as its practicability and applicability. These merit outcomes provide that the new method for phenol detection was environmentally benign and safe to humans. The prepared Tb<sub>2</sub>(ATPh)<sub>3</sub> MTP was validated through using gas chromatography for monitoring phenol in Suez Bay water accurately with high precision. The obtained results encouraged using Tb<sub>2</sub>(ATPh)<sub>3</sub> MTP for efficient, fast, selective, and direct screening of phenol in real samples. Chemistry ; Phenol ; Terbium ; Seawater ; Selectivity ; Figure of merit ; Detection limit ; Phenol red ; Luminescence ; Nuclear chemistry ; Chromatography ; Organic chemistry ; Geology Analytical chemistry methods development ; Analytical Chemistry and Sensors ; Electrochemical Analysis and Applications
Authors: S. Neumann | David Rafaja
Source: Preprints.org (preprint, 2024-09-05)
Field: Materials Science — Surfaces, Coatings and Films

Correlative Multi-scale Characterization of Nanoparticles Using Transmission Electron Microscopy Chemical and physical properties of nanoparticles (NPs) are strongly influenced not only by the crystal structure of the respective material including crystal structure defects, but also by the NP size and shape. Contemporary transmission electron microscopy (TEM) is capable of describing all of these NP characteristics, however typically with a different statistical relevance. While the size and shape of NPs are frequently determined on a large ensemble of NPs and thus with good statistics, the characteristics on the atomic scale are usually quantified for a small number of individual NPs and thus with a low statistical relevance. In this contribution, we present a TEM-based characterization technique, which is capable of determining relevant characteristics of NPs in a scale-bridging way – from the crystal structure and crystal structure defects up to the NP size and morphology – with a sufficient statistical relevance. This technique is based on a correlative multi-scale TEM approach that combines information on atomic scale obtained from the high-resolution imaging with the results of the low-resolution imaging assisted by a semi-automatic segmentation routine. The capability of the technique is illustrated on several examples including Au NPs having different shape, Au nanorods having different facet configurations and multi-core iron oxide nanoparticles having a hierarchical structure. Characterization (materials science) ; Correlative ; Transmission electron microscopy ; Electron microscope ; Nanotechnology ; Nanoparticle ; Materials science ; Electron tomography ; Scale (ratio) ; Energy filtered transmission electron microscopy ; Microscopy ; Nanoscopic scale ; Scanning transmission electron microscopy ; Physics ; Optics ; Quantum mechanics Electron and X-Ray Spectroscopy Techniques
Authors: Zachary Applebee | Caitlin Howell
Source: ChemRxiv (preprint, 2024-01-10)
Field: Materials Science — Surfaces, Coatings and Films

Multi-Component Liquid-Infused Systems: A New Approach to Functional Coatings Antifouling liquid-infused surfaces have generated interest in multiple fields due to their diverse applications in industry and medicine. In nearly all reports to date, the liquid component consists of only one chemical species. However, unlike traditional solid surfaces, the unique nature of liquid surfaces holds the potential for synergistic and even adaptive functionality simply by including additional elements in the liquid coating. In this work, we explore the concept of multi-component liquid-infused systems, in which the coating liquid consists of a primary liquid and a secondary component or components that provide additional functionality. For ease of understanding, we categorize recently reported multi-component liquid-infused surfaces according to the size of the secondary components: molecular scale, in which the secondary components are molecules; nanoscale, in which they are nanoparticles or their equivalent; and microscale, in which the additional components are micrometer size or above. We present examples at each scale, showing how introducing a secondary element into the liquid can result in synergistic effects, such as maintaining a pristine surface while actively modifying the surrounding environment, which are difficult to achieve in other surface treatments. The review highlights the diversity of fabrication methods and provides perspectives on future research directions. Introducing secondary components into the liquid matrix of liquid-infused surfaces is a promising strategy with significant potential to create a new class of multifunctional materials. Microscale chemistry ; Coating ; Component (thermodynamics) ; Nanotechnology ; Materials science ; Nanoscopic scale ; Fabrication ; Process engineering ; Computer science ; Engineering ; Physics Surface Modification and Superhydrophobicity ; Polymer Surface Interaction Studies ; Marine Biology and Environmental Chemistry
Authors: Е. А. Зауэр
Source: Chimica Techno Acta (article, 2024-03-04)
Field: Chemistry — Organic Chemistry

Modern instrumentation and practical application of flame atomic emission spectrometry The modern instrumentation for flame atomic emission spectrometry (FAES) is overviewed: the main technical (composition of the fuel gas used, dispersing element, number of analytical channels, reference channel, detecting element, sampling method) and analytical (determined elements, range of determined concentrations, limits and the accuracy of their determination, the duration of a single measurement, the equired amount of the analyzed sample) characteristics of flame photometers for industrial and clinical use as well as spectrophotometers currently made by various manufacturers such as Sherwood Scientific Ltd., BWB Technologies UK Ltd., Labtron Equipment Ltd., Labnics Equipment Ltd. and JENWAY Ltd (UK); A.KRÜSS Optronic (Germany); Cole Parmer Instrument Company and Labfon Equipment Inc. (USA); Inesa Analytical Instrument Co., Ltd (China); OJSC Zagorsk Optical and Mechanical Plant, Unico-SIS LLC and VMK-Optoelectronics LLC (Russia); Manti Lab Solutions, Labtronics, Systonic, Globe Instruments, Electronics India, Lasany (India). The main areas of application of FAES are presented – bioenergy, agriculture (analysis of plants, soil extracts and fertilizers), mineral raw materials (geology), clinical medicine and pharmaceuticals, food industry, environmental control (analysis of drinking, technical and waste water), nuclear energy, metallurgy and chemical industry, as well as some features and problems associated with the preparation of samples for analysis by the FAES method. The review includes references to works on the practical application of FAES, published mainly from 1998 to 2023. Instrumentation (computer programming) ; Atomic spectroscopy ; Atomic emission spectroscopy ; Mass spectrometry ; Analytical Chemistry (journal) ; Nuclear engineering ; Materials science ; Chemistry ; Engineering ; Computer science ; Environmental chemistry ; Spectroscopy ; Physics ; Nuclear physics ; Chromatography ; Plasma ; Programming language ; Inductively coupled plasma Chemical Thermodynamics and Molecular Structure ; Analytical chemistry methods development ; Adsorption, diffusion, and thermodynamic properties of materials
Authors: Yanjing Gao | Farbod Shirinchi | Audrey Hansrisuk | Runyao Zhu | Marya Lieberman | Matthew J. Webber | Yichun Wang
Source: ChemRxiv (preprint, 2024-04-15)
Field: Materials Science — Materials Chemistry

Sensitive Fluorometric Detection of Fentanyl-Class Agents by Competition-Mediated Supramolecular Displacement and Graphene Nanoparticle Quenching The emergence of synthetic opioids, and especially fentanyl and its analogues, has resulted in an epidemic of opioid abuse leading to a significant increase in overdose deaths in the United States, thus posing a threat to public health and safety. Current methods employed for the detection of fentanyl and its analogues have significant drawbacks in their sensitivity, scalability, and portability that limit use on a broader scale or in field-based application. The need to detect trace amounts of fentanyl in complex mixtures, and the continued emergence of new fentanyl analogues, further complicates these detection efforts. Accordingly, there is an urgent need to develop convenient, rapid, and reliable sensors for fentanyl detection. In this study, we have developed a fluorescent sensor based on the competitive displacement of a fluorophore (Hoechst 33342) from the cavity of a supramolecular macrocycle (cucurbit[7]uril), with subsequent fluorescence quenching from graphene quantum dots. This sensor can detect and quantify small quantities of fentanyl along with 58 fentanyl analogues, including detection of highly potent agents like carfentanil that are of increasing concern. Furthermore, the sensor achieves selective detection of these agents even when at 0.01 mol% in the presence of common interferents. In addition, the sensor provides results within seconds and offers stable performance over time. This simple, rapid, reliable, sensitive, and cost-effective sensor thus offers a valuable tool for detecting drugs in the fentanyl class, especially in the context of improving the effectiveness of field-based detection for law enforcement and military personnel in promoting public safety. Fentanyl ; Context (archaeology) ; Fluorophore ; Quenching (fluorescence) ; Nanotechnology ; Software portability ; Detection limit ; Materials science ; Chemistry ; Computer science ; Fluorescence ; Pharmacology ; Medicine ; Physics Luminescence and Fluorescent Materials ; Forensic Toxicology and Drug Analysis ; Mass Spectrometry Techniques and Applications
Authors: Zhongkai Liu | Peng Deng | Yuanfeng Xu | Haifeng Yang | Ding Pei | Cheng Chen | Shanmei He | Defa Liu | Sung‐Kwan Mo | T. K. Kim | Céphise Cacho | Hong Yao | Zhida Song | Xi Chen | Zhong Wang | Binghai Yan | Lexian Yang | B. Andrei Bernevig | Yulin Chen
Source: arXiv (Cornell University) (preprint, 2024-06-12)
Field: Materials Science — Surfaces, Coatings and Films

Massive 1D Dirac Line, Solitons and Reversible Manipulation on the Surface of a Prototype Obstructed Atomic Insulator, Silicon Topologically trivial insulators can be classified into atomic insulators (AIs) and obstructed atomic insulators (OAIs) depending on whether the Wannier charge centers are localized or not at spatial positions occupied by atoms. An OAI can possess unusual properties such as surface states along certain crystalline surfaces, which advantageously appear in materials with much larger bulk energy gap than topological insulators, making them more attractive for potential applications. In this work, we show that a well-known crystal, silicon (Si) is a model OAI, which naturally explains some of Si's unusual properties such as its famous (111) surface states. On this surface, using angle resolved photoemission spectroscopy (ARPES), we reveal sharp quasi-1D massive Dirac line dispersions; we also observe, using scanning tunneling microscopy/spectroscopy (STM/STS), topological solitons at the interface of the two atomic chains. Remarkably, we show that the different chain domains can be reversibly switched at the nanometer scale, suggesting the application potential in ultra-high density storage devices. Silicon on insulator ; Line (geometry) ; Insulator (electricity) ; Silicon ; Condensed matter physics ; Dirac (video compression format) ; Surface (topology) ; Physics ; Materials science ; Optoelectronics ; Quantum mechanics ; Geometry ; Mathematics Electron and X-Ray Spectroscopy Techniques ; Surface Roughness and Optical Measurements ; Distributed and Parallel Computing Systems