Journal of Materials Research最新文献

{"title":"In situ synthesis of silver nanoparticles as a facile strategy to prepare PCL scaffolds with antibacterial activity for a potential treatment for decubitus ulcers","authors":"Ece Bayrak, Mehrdad Forough, Zeynep Tutumlu, Osman Eroğul","doi":"10.1557/s43578-024-01366-w","DOIUrl":"https://doi.org/10.1557/s43578-024-01366-w","url":null,"abstract":"<p>A single-step strategy was proposed for the in situ synthesis of silver nanoparticles (AgNps) to prepare polycaprolactone scaffolds with antibacterial activity for decubitus ulcers. AgNps were synthesized, by chemical reduction method, on the surface of electrospun polycaprolactone scaffolds that had been treated with argon plasma. Different AgNO₃:NaBH₄ molar ratios (1:1–1:6) and PVP concentrations (1–3–5–10%) were investigated. For further studies, AgNO₃:NaBH₄ molar ratio of 1:3 and a 3% PVP were selected, resulting AgNps with a diameter of 91.54 ± 7.62 nm. Silver release behavior of the scaffolds exhibited a burst release within the first 12 h, followed by a plateau within 2 weeks. The synthesized AgNps demonstrated a potent antibacterial effect against <i>Escherichia coli</i> and <i>Staphylococcus aureus</i> strains, reducing viability down to 15%. PCL scaffolds with AgNps showed increased inhibition zones, 13.33 ± 2.17 mm to 14.94 ± 2.37 mm for <i>E. coli</i> and 14.76 ± 0.24 mm to 16.24 ± 1.45 mm for <i>S. aureus</i>. As a result, this single-step approach can be used as an alternative antibacterial dressing for wound injuries.</p><h3 data-test=\"abstract-sub-heading\">Graphical abstract</h3>\u0000","PeriodicalId":16306,"journal":{"name":"Journal of Materials Research","volume":"7 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141530351","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Correction: Structural, magnetic, and photocatalytic properties of core–shell reversal nanocomposites of titanium-doped strontium ferrite and silica","authors":"Jaspreet Kaur Grewal, Manpreet Kaur, Manpreet Kaur Ubhi, Aderbal C. Oliveira, Vijayendra Kumar Garg, Virender K. Sharma","doi":"10.1557/s43578-024-01360-2","DOIUrl":"https://doi.org/10.1557/s43578-024-01360-2","url":null,"abstract":"","PeriodicalId":16306,"journal":{"name":"Journal of Materials Research","volume":"63 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141167015","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhanced yield of methanol using rGO-Bi2S3/CuO heterojunction photocatalyst for CO2 reduction","authors":"Arindam Mandal, Guruprasad Bhattacharya, Kajari Kargupta","doi":"10.1557/s43578-024-01352-2","DOIUrl":"https://doi.org/10.1557/s43578-024-01352-2","url":null,"abstract":"<p>A visible light-induced rGO-Bi₂S₃/CuO S-scheme heterojunction photocatalyst is explored for the production of methanol and formic acid through photocatalytic CO₂ reduction. In this work, the effect of CuO loading on rGO-Bi₂S₃ nano-hollow flower composite are investigated to improve the yield and selectivity of methanol production. The synthesised rGO-Bi₂S₃/CuO nanocomposite, being a highly efficient and robust photocatalyst, exhibits the maximum methanol yield of 423.52 μmol g_cat.⁻¹ h⁻¹ along with formic acid. CuO loading on rGO-Bi₂S₃ is responsible for achieving the maximum photocatalytic activity of the rGO-Bi₂S₃/CuO photocatalyst, the narrowest band gap, the lowest recombination rate of electron–hole pairs, and the increased specific surface area for CO₂ capture among all the related photocatalysts, rGO-Bi₂S₃, pristine Bi₂S₃, and Bi₂S₃/CuO nanocomposite. The selectivity of methanol is improved to 98.6% by the rGO-Bi₂S₃/CuO heterojunction photocatalyst. The absorption edge (652.4 nm) of the rGO-Bi₂S₃/CuO photocatalyst clearly exhibits outstanding visible light absorption and enhanced photo carrier transportation power.</p><h3 data-test=\"abstract-sub-heading\">Graphical Abstract</h3>\u0000","PeriodicalId":16306,"journal":{"name":"Journal of Materials Research","volume":"23 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140933739","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Correction: Insight into photocatalytic behavior of magnesium ferrite–bentonite nanocomposite for the degradation of organic contaminants","authors":"Manpreet Kaur Ubhi, Manpreet Kaur, Jaspreet Kaur Grewal, Aderbal C. Oliveira, Vijayendra Kumar Garg, Virender K. Sharma","doi":"10.1557/s43578-024-01354-0","DOIUrl":"https://doi.org/10.1557/s43578-024-01354-0","url":null,"abstract":"","PeriodicalId":16306,"journal":{"name":"Journal of Materials Research","volume":"157 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140933645","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Short-range nanoregions and nanosized defects in LiFeO $$_2$$ compound deduced from Mössbauer spectroscopy and Rietveld analysis","authors":"V. Panagopoulos, E. Devlin, Y. Sanakis, V. Psycharis, M. Pissas","doi":"10.1557/s43578-024-01338-0","DOIUrl":"https://doi.org/10.1557/s43578-024-01338-0","url":null,"abstract":"<p>We examined the crystal and magnetic properties of the polymorphic LiFeO<span>(_2)</span> compound using Mössbauer spectra (MS), X-ray diffraction data (XRD), and magnetic measurements. X-ray diffraction analysis of <span>(alpha)</span>-LiFeO<span>(_2)</span> and <span>(beta ')</span>-LiFeO<span>(_2)</span> phases reveals that short-range ordering observed in the <span>(alpha)</span>-LiFeO<span>(_2)</span> phase is potentially linked to the <span>(beta ')</span>-LiFeO<span>(_2)</span> phase nanoregions. Low-temperature MS of the <span>(alpha)</span>-LiFeO<span>(_2)</span> phase reveal a complicated disordered magnetic state below 90 K. Rietveld analysis of the XRD data of the <span>(gamma)</span>-LiFeO<span>(_2)</span> phase reveals a defect microstructure. These defects produce a complicated distribution of the hyperfine magnetic field estimated from MS. While it is not possible to produce the <span>(beta ')</span>-LiFeO<span>(_2)</span> phase in pure form, extended annealing of the <span>(alpha)</span>-LiFeO<span>(_2)</span> phase at 400 <span>(^circ)</span>C yields a nanocomposite material comprising nanoregions of both <span>(beta ')</span>-LiFeO<span>(_2)</span> and <span>(gamma)</span>-LiFeO<span>(_2)</span> phases.</p><h3 data-test=\"abstract-sub-heading\">Graphical abstract</h3>\u0000","PeriodicalId":16306,"journal":{"name":"Journal of Materials Research","volume":"2015 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140933545","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Influence of electrochemical hydrogen charging on the mechanical, diffusional, and interfacial properties of an amorphous alumina coating on Fe-8 wt% Cr alloy","authors":"Hariprasad Gopalan, Jing Rao, Piyush Patil, Chanwon Jung, Se-Ho Kim, Silas Goodrich, Marcel Wetegrove, Angela Kruth, Christina Scheu, Gerhard Dehm, Maria Jazmin Duarte","doi":"10.1557/s43578-024-01348-y","DOIUrl":"https://doi.org/10.1557/s43578-024-01348-y","url":null,"abstract":"<p>Amorphous alumina coatings, intended as hydrogen barriers, were successfully deposited on Fe-8 wt% Cr substrates by plasma ion-assisted deposition technique. The amorphous structure of the coatings was confirmed by transmission electron microscopy and X-ray diffraction. The interfacial and mechanical properties of the coating-substrate system were evaluated using an in-house custom-designed backside electrochemical hydrogen charging method. In this approach, the substrate side faces the electrolyte (hydrogen entry side) and the mechanical behavior was tested on the coating side (hydrogen exit side). A Kelvin-probe-based measurement was performed to determine the hydrogen diffusivity in these amorphous alumina coatings at room temperature using a similar backside charging approach. Chemical and microstructural characterizations, in combination with scratch and hardness testing, show that interfacial hydrogen accumulation is strongly responsible for drastic changes in the scratch morphology of the coating and its adhesion to the substrate. Scratch testing promises to be a quick and easy technique to fingerprint changes at the coating/substrate interface upon hydrogen exposure.</p><h3 data-test=\"abstract-sub-heading\">Graphical abstract</h3>\u0000","PeriodicalId":16306,"journal":{"name":"Journal of Materials Research","volume":"49 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140933742","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Influence of modified halloysite nanotube on the properties of poly(ether ether ketone)","authors":"Naved Siraj, S. A. R. Hashmi, Sarika Verma","doi":"10.1557/s43578-024-01351-3","DOIUrl":"https://doi.org/10.1557/s43578-024-01351-3","url":null,"abstract":"<p>This study focuses on the modification of halloysite nanotubes (diameter 30–70 nm and length 1–3 µ) using concentrated sulphuric acid to create modified HNTs (mHNTs) and investigates their impact on the properties of PEEK material. Co-rotating twin screw extrusion is employed to incorporate various loadings of mHNTs into the PEEK matrix. The experimental results demonstrate a significant increase in hardness, impact strength, elongation at break, tensile and flexural strengths, and tensile modulus with increasing mHNT concentration. The mHNTs function as bridging tools and reinforcing agents within the polar-nonpolar hybrid system, facilitating compatibility between the blend partners. The composites exhibit improved dynamic thermal and mechanical properties compared to the pure PEEK. The composite materials are further characterized using techniques such as TGA, FESEM, DSC, DMA and FTIR. The enhanced effects observed in the developed composites are attributed to improved interfacial adhesion and favorable interactions between the PEEK matrix and the mHNTs.</p><h3 data-test=\"abstract-sub-heading\">Graphical abstract</h3>\u0000","PeriodicalId":16306,"journal":{"name":"Journal of Materials Research","volume":"254 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140933745","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluating the effect of cryopreservation, cell migration and perfused media on degradation of porous scaffold","authors":"Khemraj Deshmukh, Arindam Bit","doi":"10.1557/s43578-024-01346-0","DOIUrl":"https://doi.org/10.1557/s43578-024-01346-0","url":null,"abstract":"<p>The degradation of scaffolds is a critical aspect in tissue engineering and regenerative medicine. Various factors that influence the degradation of scaffold are viscosity, density, hydrophilicity, temperature, cells and degradation environment. In present study, the degradation of scaffold were evaluated in presence of perfused media, Red blood cells (RBC), and cryogenic conditions. Different properties such as density, viscosity and contact angle of bio-ink used for fabrication of scaffold were also evaluated and their correlation to desired environment conditions were also evaluated. A poly electrolyte complex scaffolds (chitosan: alginate, chitosan: gelatine), and explicit scaffolds were considered for degradation study. Explicit scaffold and PEC scaffolds were fabricated form chitosan, alginate and gelatine at mixing ratio of 20:80, 50:50, and 80:20 concentration by solvent casting and etching method. The scaffold degradation studies in perfused media were performed at flow rate of 0.5 ml/min, 1 ml/min and 2 ml/min. The parameters related to degradation of scaffold such as weight and pH of discharge media were also evaluated. Results indicated that degradation of chitosan: alginate at 20:80 concentration had shown maximum degradation in presence of RBCs. Similarly, degradation pattern was equal to linear patten for all the scaffolds except 20:80 and 50:50 concentration of chitosan-alginate in cryogenic conditions. Result of scaffolds degradation in perfused media had shown that scaffolds were degraded maximal at a flow rate of 1 ml/min as compare to other flow rates. Contact angle measurement had proved that all PEC scaffold belongs to the category of hydrophilic family. The scaffold fabricated from higher concentration of chitosan had revealed slower degradation as compare to others configuration. The acceleration of scaffold degradation was tiggered by enzymatic and cellular activities in the presence of RBCs. Perfused media had caused scaffold degradation due to presence of mechanical shear stress.</p><h3 data-test=\"abstract-sub-heading\">Graphical abstract</h3>\u0000","PeriodicalId":16306,"journal":{"name":"Journal of Materials Research","volume":"13 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140838702","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Nanoarchitectonics of catalytic tubular nanomotors based on Cu/Fe@SBA-15 for lung cancer treatment","authors":"Mohamed S. El-Okaily, Ahmed M. A. El-Seidy, Eman H. Ismail, Rasha M. Allam, Ayman A. Saeed, Asim Bhaumik, Amany A. Mostafa","doi":"10.1557/s43578-024-01342-4","DOIUrl":"https://doi.org/10.1557/s43578-024-01342-4","url":null,"abstract":"<p>Fabrications of nanomotors (NMs) are at the forefront of exploring the true potential of nanotechnology. Tubular nanomotors (TNMs) have been attracting huge interest recently. NMs based on 2D-hexagonal mesoporous silica (SBA-15) have been prepared through the surfactant-assisted sol–gel method. Copper and/or iron oxide nanoparticles have been impregnated in SBA-15 to form catalytic tubular nanomotors. Characterization has been investigated by XPS, XRD, HR-TEM, SEM–EDS, and BET. The electrochemical measurements were used to confirm the motion of the nanomotors. By increasing the loading of metal oxide nanoparticles, the motion decreases; this could be observed from the current loss. The anti-cancer potential of synthesized nanomotors against two cell lines (A549 and H460) of human lung carcinoma has been tested. Among all tested NMs, high-metal oxide-loaded materials containing CuO only as well as CuO and Fe₂O₃ are potent and significant in apoptotic cell death for lung cancer treatment.</p><h3 data-test=\"abstract-sub-heading\">Graphical abstract</h3>","PeriodicalId":16306,"journal":{"name":"Journal of Materials Research","volume":"11 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140838940","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Microstructural, mechanical, room, and high temperature tribological properties of graphene oxide reinforced plasma sprayed alumina nanocomposite coatings","authors":"Suraj Prasad, S. Sharma, Chintham Satish, Pushpender Singh, Satish Indupuri, P. Sai Kiran, Niranjan Pandit, Shailesh Mani Pandey, Anup Kumar Keshri","doi":"10.1557/s43578-024-01347-z","DOIUrl":"https://doi.org/10.1557/s43578-024-01347-z","url":null,"abstract":"<p>High-temperature tribological performance novel coatings are much in demand, which requires improving the wear performance of prevalent and widespread ceramic coatings used presently. Hence, graphene oxide (GO) reinforced alumina coatings (0.5–2 wt %) were deposited on steel substrates via atmospheric plasma spraying (APS), enhancing wear performance for high-temperature applications. With 1.5 wt% GO, coating density increased from 88.5 to 94.61%, elevating hardness and elastic modulus by ~ 47.5% and ~ 62.9%, respectively. Tribological analysis at room temperature and elevated temperatures (473 K, 673 K, 873 K) demonstrated a significant reduction in friction coefficient and wear rate compared to monolithic alumina coatings. The enhanced wear resistance is attributed to the tribo-chemical layer formation and increased hardness, suggesting potential for the development of high-temperature operating coatings. This coating is thought to have the potential to open the door to the development of high-temperature operating coatings.</p><h3 data-test=\"abstract-sub-heading\">Graphical abstract</h3>","PeriodicalId":16306,"journal":{"name":"Journal of Materials Research","volume":"77 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140811414","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}