RSC Advances最新文献

{"title":"Wearable threads for monitoring sanitizer quality using dye displacement assay†","authors":"Pratham Joshi, Akhiya Shinde, Sukanya Sudhiram, Bibhu Ranjan Sarangi and Naresh Kumar Mani","doi":"10.1039/D4RA04379K","DOIUrl":"https://doi.org/10.1039/D4RA04379K","url":null,"abstract":"<p >This study employs zero-cost (≈0.01 $) and durable thread-based devices to evaluate the quality of simulated and commercial sanitizer samples through dye displacement assay (DDA). A diverse range of sanitizer compositions, including ethanol concentrations of 55%, 75%, and 95% (v/v), were analysed. This investigation encompasses an assessment of the marker type (Doms and Hauser brands) on the migration distance of the dye region marked on thread devices. Our results demonstrate a proportional increase in the migration distance of the dye with increasing ethanol concentrations due to a decrease in the coefficient of viscosity and solvation power of ethanol on dye molecules. Additionally, a field trial for the thorough assessment of commercial sanitizer quality using thread-based devices further underscores the efficacy of this methodology. A calibration plot for a braided thread with Doms marker dye provides a reliable means to quantitatively assess the ethanol content in different commercial sanitizer compositions. Our findings collectively highlight the significance of this innovative method as a valuable tool for quality control and assessment for public health and hygiene as well as for preparing us for another pandemic.</p>","PeriodicalId":102,"journal":{"name":"RSC Advances","volume":" 50","pages":" 37155-37163"},"PeriodicalIF":3.9,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/ra/d4ra04379k?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142672304","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sea foam contains hemoglycin from cosmic dust†","authors":"Julie E. M. McGeoch and Malcolm W. McGeoch","doi":"10.1039/D4RA06881E","DOIUrl":"https://doi.org/10.1039/D4RA06881E","url":null,"abstract":"<p >In-falling cosmic dust has left evidence of meteoritic polymer amide in stromatolites, both fossil and modern. In search of evidence for continued present day in-fall, sea foam was collected from two beaches in Rhode Island and subjected to Folch extraction to concentrate amphiphilic components in a chloroform water–methanol interphase layer. Hemoglycin polymer amide molecules previously characterized by MALDI mass spectrometry in meteorites and stromatolites were identified in sea foam either directly, or <em>via</em> their fragmentation patterns. Residual isotope enrichment pointed to an extra-terrestrial origin. The unique resiliency of sea foam may be due to the formation of extended hemoglycin lattices that stabilize its closed-cell structure and its lightness can potentially be explained by photolytic hydrogen production.</p>","PeriodicalId":102,"journal":{"name":"RSC Advances","volume":" 50","pages":" 36919-36929"},"PeriodicalIF":3.9,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/ra/d4ra06881e?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142672328","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Nanozymes: a promising solution for dental antibacterial applications","authors":"Lipeng Liu, Yaoyuan Zhang, Tianjuan Ju, Xutao Chen, Xinwei Li and Li-an Wu","doi":"10.1039/D4RA07303G","DOIUrl":"https://doi.org/10.1039/D4RA07303G","url":null,"abstract":"<p >Dental diseases pose significant public health challenges globally, affecting millions with conditions exacerbated by microbial-induced inflammation. Traditional natural enzymes, despite their antibacterial and anti-inflammatory capabilities, are limited by operational stability and environmental sensitivity. This review explores the revolutionary realm of nanozyme-artificial enzymes made from nanomaterials-which offer enhanced stability, cost-effectiveness, and ease of modification. We discuss the advent of nanozymes since their first recognition in 2007, emphasizing their enzyme-mimicking capabilities and applications in dental medicine, particularly for dental caries, pulpitis, periodontitis and peri-implantitis. This paper presents a comprehensive analysis of nanozymes' classification, mechanisms, and emerging applications, shedding light on their potential to revolutionize dental antibacterial treatments and addressing current challenges and future perspectives in their development.</p>","PeriodicalId":102,"journal":{"name":"RSC Advances","volume":" 50","pages":" 36945-36959"},"PeriodicalIF":3.9,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/ra/d4ra07303g?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142672331","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Production of aromatic hydrocarbons from catalytic fast pyrolysis of microalgae over Fe-modified HZSM-5 catalysts","authors":"Xinyun Wang, Chuan Li, Jiliang Yang, Yefeng Liu, Jinpei Hei, Shiqi Huang and Daming Gao","doi":"10.1039/D4RA06815G","DOIUrl":"https://doi.org/10.1039/D4RA06815G","url":null,"abstract":"<p >In this study, catalytic fast pyrolysis of the microalga <em>C. pyrenoidosa</em> over Fe-modified HZSM-5 catalysts was performed to produce aromatic hydrocarbons using analytical pyrolysis-gas chromatography/mass spectrometry (Py-GC/MS). Fe-modified HZSM-5 catalysts were prepared using wet impregnation and characterized through X-ray diffraction (XRD), scanning electron microscopy (SEM), N<small>₂</small> adsorption–desorption and temperature-programmed desorption of ammonia (NH<small>₃</small>-TPD) analysis. The effect of Fe loading (3, 5, 8, and 12 wt%) and pyrolysis temperature (450, 500, 550, 600 °C) on the content of pyrolysis products and the content and selectivity of aromatics was examined. Results showed that the parent HZSM-5 catalyst structure remained intact upon increasing Fe loading, although its specific surface area, micropore volume and average pore diameter decreased. In addition, its external specific surface area and total pore volume increased. The modification of Fe metal increased the total acid amount, especially strong acid sites, which were highest when Fe loading was 8 wt%. The prepared Fe-modified HZSM-5 catalysts exhibited pronounced deoxygenation and denitrogenation effects, which significantly decreased the acid, aldehyde, ketone, furan and nitrogenous compounds, thus improving the production of monocyclic aromatic hydrocarbons (MAHs) while effectively suppressing the formation of polycyclic aromatic hydrocarbons (PAHs). The highest content of aromatic hydrocarbons was obtained with an Fe loading of 8 wt% and pyrolysis temperature of 500 °C, which was 42.5%. As Fe loading increased, benzene selectivity decreased, while the selectivity of toluene and xylene first increased and then decreased. With an increase in pyrolysis temperature, benzene selectivity increased, whereas toluene and xylene selectivity increased at first and then decreased. Reaction mechanisms for the formation of aromatic hydrocarbons during the catalytic pyrolysis of microalgae are put forward. This research revealed that catalytic fast pyrolysis of microalgae over Fe-modified HZSM-5 catalysts is an effective method to produce MAHs.</p>","PeriodicalId":102,"journal":{"name":"RSC Advances","volume":" 50","pages":" 36970-36979"},"PeriodicalIF":3.9,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/ra/d4ra06815g?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142672333","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optimizing the optoelectronic properties of broadband FeS2/Si photodetectors via deposition temperature tuning in chemical bath deposition","authors":"Mustafa W. Fatehi, Huda Saadi Ali and Raid A. Ismail","doi":"10.1039/D4RA06930G","DOIUrl":"https://doi.org/10.1039/D4RA06930G","url":null,"abstract":"<p >This study investigates the fabrication and characterization of n-FeS<small>₂</small>/p-Si heterojunction photodetectors using chemical bath deposition (CBD) at deposition temperatures ranging from 50 °C to 80 °C. The impact of temperature on the structural, morphological, and optical properties of FeS<small>₂</small> thin films was evaluated. X-ray diffraction (XRD) revealed polycrystalline cubic FeS<small>₂</small> with improved crystallinity as the deposition temperature increased. The optical energy gaps of the films ranged from 2.41 eV to 1.6 eV, decreasing with higher temperatures. Scanning electron microscopy (FE-SEM) showed that grain size increased from 30 nm to 180 nm as the temperature rose. Hall effect measurements confirmed the n-type conductivity of the film, with mobility decreasing from 5 to 3.17 cm<small>²</small> V<small>⁻¹</small> s<small>⁻¹</small> at higher temperatures. The heterojunctions exhibited rectifying behavior, with the best ideality factor of 1.7 observed at 60 °C. The photodetector fabricated at 60 °C showed superior performance, with a responsivity of 0.37 A W<small>⁻¹</small> at 520 nm and 0.7 A W<small>⁻¹</small> at 770 nm, an external quantum efficiency of 52%, and a detectivity of 8 × 10<small>¹¹</small> Jones at 520 nm, making it the optimal configuration for efficient broadband photodetection.</p>","PeriodicalId":102,"journal":{"name":"RSC Advances","volume":" 50","pages":" 37019-37034"},"PeriodicalIF":3.9,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/ra/d4ra06930g?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142672335","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Charging toward sustainability: MgCl2 doped chitosan–dextran polyblend electrolytes for energy storage device applications†","authors":"Pradeep Nayak, Ismayil, Y. N. Sudhakar and Supriya K. Shetty","doi":"10.1039/D4RA06365A","DOIUrl":"https://doi.org/10.1039/D4RA06365A","url":null,"abstract":"<p >In this study, chitosan (CS), dextran (DN), and magnesium chloride (MgCl<small>₂</small>) salt-based soild blend polymer electrolyte (SBPE) membranes that conduct Mg<small>²⁺</small> ions have been developed. XRD revealed changes in the microstructure by incorporating MgCl<small>₂</small> salt into the polymer host due to polyblend–ion interaction, verified by Fourier transform infrared spectroscopy. At room temperature, the electrolyte membrane containing 30 wt% MgCl<small>₂</small> reached an ionic conductivity of 1.79 × 10<small>⁻⁵</small> S cm<small>⁻¹</small>. An ion transference number (<em>t</em><small>_ion</small>) of about 0.73 was achieved for 30 wt% of magnesium salt, suggesting the dominance of ion conduction in the SBPE sample. The SBPE membrane with the highest ion conductivity demonstrated an electrochemical stability window (ESW) of 2.66 V. Thermal degradation of the SBPE is influenced by the amount of salt incorporated in the poly-blend matrix as per TGA analysis. The discharge behaviour patterns of magnesium ion cells using the Mg|(CS + DN + MgCl<small>₂</small>)|cathode setup were investigated with two distinct cathode materials. Moreover, the fabricated electrochemical double-layer capacitor (EDLC) showed non-faradaic behaviour in cyclic voltammetry (CV) studies with the specific capacitance of 36 F g<small>⁻¹</small> at 5 mV s<small>⁻¹</small>. An environmentally friendly, biodegradable, and economically viable electrolyte that can effectively serve as a separator and electrolyte in devices such as magnesium-ion batteries and EDLCs has been investigated in this work.</p>","PeriodicalId":102,"journal":{"name":"RSC Advances","volume":" 50","pages":" 37045-37061"},"PeriodicalIF":3.9,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/ra/d4ra06365a?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142672293","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Preparation of biomass-derived red emission carbon dots for real-time and long-term tracking of cells and tumor growth","authors":"Yuefang Hu, Yuxin Chen, Wenwang Wei and Hanfu Liu","doi":"10.1039/D4RA05018E","DOIUrl":"https://doi.org/10.1039/D4RA05018E","url":null,"abstract":"<p >Effective real-time cell tracking and tumor growth monitoring are important for precise diagnosis and therapy of tumors and can also be used to monitor biological processes. In this study, a facile, green microwave method was developed to synthesize biomass-derived red emission carbon dots (RCDs) using the ethanolic extract of holly leaves. Owing to the advantages of the prepared RCDs, such as near infrared emission, stability, strong fluorescence intensity, excellent biocompatibility, penetration of thick tissues, avoiding background fluorescence interference, and improvement of the signal-to-noise ratio of biological imaging, they were applied to cell imaging, real-time cell tracking and tumor growth monitoring. Experimental results revealed that the RCDs could present strong red fluorescence emission when they entered the cells. The labeled cells still emitted red fluorescence after 13 generations of passage and could monitor tumor growth in real-time for more than 18 days. These results indicated that RCDs could be used as effective long-term near-infrared fluorescent imaging probes for cells and tumors, presenting broad application prospects in image-guided therapy.</p>","PeriodicalId":102,"journal":{"name":"RSC Advances","volume":" 50","pages":" 37104-37113"},"PeriodicalIF":3.9,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/ra/d4ra05018e?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142672301","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Antileishmanial potential of thiourea-based derivatives: design, synthesis and biological activity†","authors":"Abdul Hadi, Muhammad Yaqoob, Fahad Hussain, Yasser M.S.A Al-Kahraman, Muhammad Saeed Jan, Abid Mahmood, Thomas Shier and Umer Rashid","doi":"10.1039/D4RA04965A","DOIUrl":"https://doi.org/10.1039/D4RA04965A","url":null,"abstract":"<p >Leishmaniasis is a neglected tropical disease caused by protozoan parasites and transmitted to humans by the sandfly vector. Currently, the disease has limited therapeutic alternatives. Thiourea derivatives were designed, synthesized, and screened for antileishmanial activity. The synthesized compounds <strong>4g</strong>, <strong>20a</strong>, and <strong>20b</strong> demonstrated significant <em>in vitro</em> potency against <em>L. major</em>, <em>L. tropica</em>, and <em>L. donovani</em> promastigotes with IC<small>₅₀</small> values at low submicromolar concentrations. Compound <strong>4g</strong> showed the highest activity against the amastigotes of <em>L. major</em>. In enzyme inhibition assays, compounds <strong>4g</strong>, <strong>20a</strong>, and <strong>20b</strong> demonstrated good inhibitory potential against <em>L. major</em> dihydrofolate reductase (DHFR) and pteridine reductase 1 (PTR1). Reversal of the antileishmanial effect by adding folic acid revealed that the compounds <strong>4g</strong>, <strong>20a</strong>, and <strong>20b</strong> act through an antifolate mechanism. Cytotoxicity data on normal human embryonic kidney cells (HEK-293) showed that the synthesized compounds displayed better safety profiles. Docking experiments on the enzymes <em>L. major</em> DHFR and PTR1 demonstrated the significant interactions with the active pocket residues of the target enzymes.</p>","PeriodicalId":102,"journal":{"name":"RSC Advances","volume":" 50","pages":" 37131-37141"},"PeriodicalIF":3.9,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/ra/d4ra04965a?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142672302","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synthesis, crystal structure, and antiviral evaluation of new imidazopyridine-schiff base derivatives: in vitro and in silico anti-HIV studies†","authors":"Mohamed Azzouzi, Abderrahim Ait Ouchaoui, Omar Azougagh, Salah Eddine El Hadad, Mohamed Abou-salama, Adyl Oussaid, Christophe Pannecouque and Taoufik Rohand","doi":"10.1039/D4RA07561G","DOIUrl":"https://doi.org/10.1039/D4RA07561G","url":null,"abstract":"<p >A series of Imidazo[1,2-<em>a</em>]pyridine-Schiff base derivatives were synthesized and characterized using <small>¹</small>H NMR, <small>¹³</small>C NMR, Mass Spectrometry and FTIR techniques, and the structure of <strong>4a</strong> was further confirmed through single-crystal X-ray diffraction analysis. Density Functional Theory (DFT) has been used to investigate the structural and electronic properties. The synthesized compounds were evaluated <em>in vitro</em> for their antiviral activity against human immunodeficiency virus type-1 (HIV-1) and human immunodeficiency virus type-2 (HIV-2) in MT-4 cells. Compound <strong>4a</strong> displayed EC<small>₅₀</small> values of 82,02 and 47,72 μg ml<small>⁻¹</small> against HIV-1 and HIV-2, respectively. Molecular docking studies were conducted to gain insights into the interaction mechanism of the synthesized compounds with HIV-1 reverse transcriptase. ADME analysis suggested acceptable pharmacokinetic profiles, though solubility remains a limitation for these compounds, highlighting the need for further structural modifications to enhance bioavailability and therapeutic potential.</p>","PeriodicalId":102,"journal":{"name":"RSC Advances","volume":" 50","pages":" 36902-36918"},"PeriodicalIF":3.9,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/ra/d4ra07561g?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142672327","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synergistic effects of hierarchical micro/nanostructures and PDMS/lubricant composites for superior tribological and wetting performance on aluminum","authors":"Sung-Jun Lee, Dawit Zenebe Segu and Chang-Lae Kim","doi":"10.1039/D4RA04121F","DOIUrl":"https://doi.org/10.1039/D4RA04121F","url":null,"abstract":"<p >In this study, we propose a method to enhance the friction and wetting properties of aluminum surfaces with micro-/nanostructures by coating them with a PDMS/lubricant composite. Hierarchical micro/nanostructures were formed on the aluminum surface through an etching process, and coating solutions were prepared by mixing xylene and the PDMS/lubricant composites in various ratios. The surface morphology, roughness, and wettability of the coated specimens were analyzed, and their friction and wear characteristics were evaluated under dry and lubricated conditions. The results showed that the PDMS/lubricant composite coating significantly reduced friction and wear under both dry and lubricated conditions owing to the formation of a stable lubricating film. Additionally, the hierarchical micro/nanostructures formed by the etching process improved hydrophobicity and self-cleaning ability. The coated surface exhibited selective wettability towards water and oil, offering various advantages such as prevention of contamination, prevention of wear and performance degradation caused by lubricant oxidation, and enhanced corrosion resistance. The findings of this study are expected to contribute to the development of lightweight mechanical-component technologies with improved durability and wear resistance.</p>","PeriodicalId":102,"journal":{"name":"RSC Advances","volume":" 50","pages":" 37062-37073"},"PeriodicalIF":3.9,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/ra/d4ra04121f?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142672297","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}