Materials Advances最新文献

{"title":"4D printed polymethacrylate lattices capable of dimensional switching and payload release via photoresponsive actuation of azobenzene units","authors":"James MacKay, Lewis R. Hart, Alarqam Z. Tareq, Simeng Wang, Valeria Gonzalez Abrego, Ian Maskery, Derek Irvine, Ricky D. Wildman and Wayne Hayes","doi":"10.1039/D5MA00670H","DOIUrl":"https://doi.org/10.1039/D5MA00670H","url":null,"abstract":"<p >In this report, we demonstrate the synthesis of photoresponsive polymeric hydrogel lattices using stereolithographic 3D printing to afford objects that can change shape when irradiated with UV-vis light. Methacrylate-based monomers featuring azobenzene units were used as the photo-actuator components. Co-polymerisation of these monomers with 2-hydroxyethyl methacrylate produced well-defined hydrogel lattices. Photo-actuation of the hydrogels led to contraction of the 3D printed lattices up to 23% by volume. The ability of such photoresponsive hydrogel lattices to exhibit payload release has been studied using methylene blue as a drug mimic. Upon irradiation, the hydrogel lattice was squeezed like a sponge through photo-induced actuation in pulses, resulting in the controlled release of the pro-drug over 24 hours.</p>","PeriodicalId":18242,"journal":{"name":"Materials Advances","volume":" 17","pages":" 6174-6182"},"PeriodicalIF":4.7,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/ma/d5ma00670h?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144909568","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Photoinduced supercapacitance and photocatalytic performance of TiO2 enhanced by electronic band structure modification using Cu-doping","authors":"Sakshi Chaudhary, Kanak Pal Singh Parmar, Prachi Jain and Ankush Vij","doi":"10.1039/D5MA00414D","DOIUrl":"https://doi.org/10.1039/D5MA00414D","url":null,"abstract":"<p >We demonstrate that doping a modest quantity of Cu impurity into anatase TiO<small>₂</small> enhances its photoinduced electrocatalytic supercapacitance by about 84% and its photocatalytic activity by more than two-fold. X-ray diffraction (XRD), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), and electron paramagnetic resonance (EPR) spectroscopy analyses validate that the Cu dopant is fully incorporated into the tetragonal crystal structure of the host material and creates Ti<small>³⁺</small> and oxygen vacancies. Furthermore, UV-vis spectroscopy and photoluminescence (PL) studies demonstrate that the smallest optical band gap energy (<em>E</em><small>_b</small>) of 2.85 eV and minimal recombination of photoinduced charge carrier pairs occur at a 3% Cu doping amount. Transmission electron microscopy (TEM) images reveal that pristine TiO<small>₂</small> and Cu-doped TiO<small>₂</small> exhibit nearly identical pebble-like nanoparticle morphologies. This 3% Cu-doped TiO<small>₂</small> demonstrates more than double photodegradation (95.7%; 150 min) of a toxic Rhodamine B dye molecule and a nearly 84% improved supercapacitance (347 F g<small>⁻¹</small>; 0.5 M aq. Na<small>₂</small>SO<small>₄</small>; pH = 7) compared to that of pristine anatase TiO<small>₂</small>. Under suitable testing conditions of other electrolytes, molecular dyes, light intensity, <em>etc.</em>, Cu-doped TiO<small>₂</small> with different particle shapes may demonstrate even greater supercapacitive behavior and photodissociation properties, leading to more advantageous applications for photoactive Cu-doped TiO<small>₂</small> materials.</p>","PeriodicalId":18242,"journal":{"name":"Materials Advances","volume":" 18","pages":" 6518-6527"},"PeriodicalIF":4.7,"publicationDate":"2025-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/ma/d5ma00414d?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145062091","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Unveiling the role of silver-promoted phase evolution in antimony sulfide thin films for photoelectrochemical activity","authors":"D. M. Kavya, Akshay Kumar Sonwane, Y. N. Sudhakar, Sajan D. George and Y. Raviprakash","doi":"10.1039/D5MA00616C","DOIUrl":"https://doi.org/10.1039/D5MA00616C","url":null,"abstract":"<p >Antimony sulfide (Sb<small>₂</small>S<small>₃</small>) is a promising candidate for photoelectrochemical (PEC) water splitting due to its narrow band gap (∼1.7 eV), high optical absorption coefficient, and the earth-abundant nature of its constituent elements. However, deep-level defects promoting charge carrier recombination often hinder PEC performance. In this study, we investigated the effects of silver (Ag) incorporation on the structural, morphological, and photoelectrochemical properties of thermally evaporated Sb<small>₂</small>S<small>₃</small> thin films. Compared with pristine films, Ag doping induces a shift in the preferred crystallographic orientation from (<em>hk</em>0) to (<em>hk</em>1), with notable morphological modifications and a reduction in surface roughness. Despite these structural improvements, the photocurrent density of the Ag-doped films decreased from 0.49 to 0.27 mA cm<small>⁻²</small> under standard illumination, indicating that Ag incorporation adversely affects charge transport and catalytic activity. These findings highlight the critical role of dopant-induced defects in governing the PEC performance of Sb<small>₂</small>S<small>₃</small>-based photoelectrodes.</p>","PeriodicalId":18242,"journal":{"name":"Materials Advances","volume":" 18","pages":" 6528-6541"},"PeriodicalIF":4.7,"publicationDate":"2025-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/ma/d5ma00616c?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145062092","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Control of cancer cell phenotypes via supramolecular hydrogels: the role of extracellular matrix stiffness","authors":"Virginie Baylot, Bruno Alies, Palma Rocchi and Philippe Barthélémy","doi":"10.1039/D5MA00579E","DOIUrl":"https://doi.org/10.1039/D5MA00579E","url":null,"abstract":"<p >Malignant cell lines are frequently used as a model to understand cancer and identify potential new treatments. However, maintaining the initial cancer cell phenotypes in a culture remains an important challenge and strongly impacts the proper evaluation of novel therapeutic approaches. The mechanical properties of the extracellular matrix (ECM) are known to strongly impact the fate and phenotype of cells. Herein, we report a tunable artificial ECM based on supramolecular gels, allowing the control of cancer cell phenotypes.</p>","PeriodicalId":18242,"journal":{"name":"Materials Advances","volume":" 18","pages":" 6257-6261"},"PeriodicalIF":4.7,"publicationDate":"2025-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/ma/d5ma00579e?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145062106","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"3D honeycomb porous sulfonated covalent organic polymer (PCOP) synthesized on carbon fabric at refrigerated temperature: supercapacitor and metal-free proton relay for water oxidation in alkaline and neutral media†","authors":"Roghayeh Azizi, Mojtaba Shamsipur, Avat (Arman) Taherpour, Maryam Miri and Afshin Pashabadi","doi":"10.1039/D5MA00451A","DOIUrl":"https://doi.org/10.1039/D5MA00451A","url":null,"abstract":"<p >The sluggish rate of proton transfers during proton-coupled electron transfer is one of the challenges in designing a holistic blueprint for complete biomimicry. Here, we present a one-pot, facile method for the refrigerated synthesis of two different covalent organic polymers by the separate copolymerization of diphenylamine-4-sulfonic acid and diphenylamine with <em>para</em>-aminophenol. Substituting diphenylamine with its porous sulfonate analog (PCOP) significantly alters the structural design and proton shuttling characteristics, resulting in remarkable efficiency in the uncommon non-concentrated proton-coupled electron transfer (n-PCET) during OER in both alkaline and neutral media. The functionalized carbon fabric (FCF)/PCOP requires an overpotential of 234 mV at 10 mA cm<small>⁻²</small>, comparable to metal-based electrocatalysts. A striking semi-reflective boundary condition in the Nyquist plot in acidic media introduces a net capacitive behavior upon protonation of –SO<small>₃</small><small>⁻</small>, revealing an ideal capacitor, which has been targeted in the design of a supercapacitor in 0.1 M H<small>₂</small>SO<small>₄</small> with capacitance <em>C</em><small>_sp</small> = 670.79 F g<small>⁻¹</small>, retaining 89.52% even after 12 000 charge–discharge cycles. Further experimental evidence was obtained by D/H isotope studies, proton inventory, pH dependence analysis, PCOP-water ATR spectroscopy and Gerischer impedance spectroscopy. The results of the DFT studies were used to further explore the structural engineering driven by water clusters and SDS molecules during the cooled synthesis of the COP.</p>","PeriodicalId":18242,"journal":{"name":"Materials Advances","volume":" 17","pages":" 6094-6108"},"PeriodicalIF":4.7,"publicationDate":"2025-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/ma/d5ma00451a?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144909548","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Advanced 2D MoS2–chitosan nanocomposites for ultra-sensitive and selective dopamine detection","authors":"Ratiba Wali, Rayhane Zribi, Viviana Bressi, Ramzi Maalej, Antonino Foti, Pietro Giuseppe Gucciardi, Wissem Cheikhrouhou-Koubaa and Giovanni Neri","doi":"10.1039/D5MA00133A","DOIUrl":"https://doi.org/10.1039/D5MA00133A","url":null,"abstract":"<p >Dopamine, an essential neurotransmitter in the central nervous system, plays a key role in neurological disorders such as Parkinson's disease, making its accurate monitoring critical for effective prevention, diagnosis, and management. This study introduces a novel and cost-effective electrochemical sensor for dopamine detection, leveraging molybdenum disulfide–chitosan (Cs–MoS<small>₂</small>) nanohybrids synthesized <em>via</em> a simple liquid-phase exfoliation (LPE) method. Chitosan nanoparticles were dispersed in a solution containing molybdenum disulphide (MoS<small>₂</small>) nanosheets to form the Cs–MoS<small>₂</small> nanohybrids. These nanohybrids were extensively characterized using UV-visible spectroscopy, Fourier transform infrared (FTIR) spectroscopy, Raman spectroscopy, thermogravimetric analysis (TGA), and atomic force microscopy (AFM), confirming their successful synthesis and unique properties. Commercial screen-printed electrodes (SPEs) were modified with the Cs–MoS<small>₂</small> nanohybrids and evaluated for dopamine sensing through cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and differential pulse voltammetry (DPV). The sensor exhibited high sensitivity, with two distinct linear response ranges: 4.48 μA μM<small>⁻¹</small> cm<small>⁻²</small> for 0–40 μM and 1.67 μA μM<small>⁻¹</small> cm<small>⁻²</small> for 40–440 μM. The limit of detection (LOD) was determined to be 0.8 μM. These performance metrics demonstrate superior analytical capabilities, including excellent selectivity against common interfering species in body fluids, good stability, and reproducibility. The findings underline the novelty of utilizing Cs–MoS<small>₂</small> nanohybrids in electrochemical dopamine detection and highlight their potential for practical applications in biomedical diagnostics.</p>","PeriodicalId":18242,"journal":{"name":"Materials Advances","volume":" 17","pages":" 6038-6051"},"PeriodicalIF":4.7,"publicationDate":"2025-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/ma/d5ma00133a?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144909540","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Countering in situ reduction of SnO2 during electrochemical CO2 conversion via oxidative pulsing†","authors":"Sven Arnouts, Kevin Van Daele, Nick Daems, Mathias van der Veer, Sara Bals and Tom Breugelmans","doi":"10.1039/D5MA00272A","DOIUrl":"10.1039/D5MA00272A","url":null,"abstract":"<p >The application of periodic anodic pulses in CO<small>₂</small> electroreduction (p-eCO<small>₂</small>R) offers a promising route to counteract the inevitable <em>in situ</em> reduction of metal oxide catalysts. This study demonstrates the first application of p-eCO<small>₂</small>R to a catalyst composed solely of a tin (oxide) active phase, using a pomegranate-structured SnO<small>₂</small>@C nanosphere. Periodic, prolonged anodic pulses (30 s) at 0.2 V <em>vs.</em> RHE improved faradaic efficiency towards formate after 6 hours, retaining 78 ± 2% <em>versus</em> 71 ± 6% under potentiostatic conditions, suggesting p-eCO<small>₂</small>R can extend Sn-based catalyst lifetimes for more sustainable CO<small>₂</small> conversion.</p>","PeriodicalId":18242,"journal":{"name":"Materials Advances","volume":" 17","pages":" 5857-5863"},"PeriodicalIF":4.7,"publicationDate":"2025-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12309465/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144775781","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synergistic effects of Ag/g-C3N4-incorporated bi-metallic ZnTi-LDH in CO2 photoreduction to hydrocarbons†","authors":"Jijoe Samuel Prabagar, C. Ashajyothi, Arpan Kumar Tripathi, Peter R. Makgwane, Akhtar Rasool, Mohammed H Alqarni, Ahmed I. Foudah, Dong-Kwon Lim and Harikaranahalli Puttaiah Shivaraju","doi":"10.1039/D5MA00650C","DOIUrl":"https://doi.org/10.1039/D5MA00650C","url":null,"abstract":"<p >Coupling solar energy with photocatalytic processes offers a viable route to address environmental challenges such as pollution remediation and CO<small>₂</small> reduction. The strategic construction of heterojunctions enhances charge separation efficiency, thereby improving photocatalytic performance. Herein, a bi-metallic ZnTi-LDH/Ag/g-C<small>₃</small>N<small>₄</small> heterojunction photocatalyst was rationally engineered to facilitate the photoreduction of CO<small>₂</small> into value-added hydrocarbon compounds, offering potential utility across energy, chemical, and environmental sectors. The distinctive peaks in the XRD patterns, along with the elemental interactions analyzed through XPS and surface atomic ratio calculations based on the XPS results, further established the successful formation of ZnTi-LDH-Ag/gC<small>₃</small>N<small>₄</small>. The composite exhibited an absorbance range within the spectrum window of 400–500 nm with a narrow bandgap of 2.13 eV, indicating its potential for photocatalysis in the visible light region. PL spectra suggested that the interface has the potential to suppress electron–hole recombination compared to pristine ZnTi-LDH and Ag/gC<small>₃</small>N<small>₄</small>. The photoreduction studies of CO<small>₂</small> using this interface composite demonstrated the successful generation of 36.66 mmol L<small>⁻¹</small> of CH<small>₃</small>OH and 10.86 mmol L<small>⁻¹</small> of HCOOH. Notably, the selectivity of CH<small>₃</small>OH was 91.01% compared to 8.99% of HCOOH. The stability and recyclability test revealed consistent generation of CH<small>₃</small>OH and HCOOH over three cyclic runs without alteration in the interface structures. The engineered photocatalyst composite demonstrates strong activity for visible-light-driven CO<small>₂</small> conversion into valuable hydrocarbons, underscoring solar energy as a viable route for both carbon mitigation and sustainable resource synthesis.</p>","PeriodicalId":18242,"journal":{"name":"Materials Advances","volume":" 17","pages":" 6008-6021"},"PeriodicalIF":4.7,"publicationDate":"2025-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/ma/d5ma00650c?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144909514","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Additive manufacturing of commercially pure magnesium and Mg–2Ag–2Sn alloys by in situ alloying during laser powder bed fusion","authors":"Ajit Kumar, Muralidhar Yadav, C. P. Paul, Sanjay Mishra, Satyam Suwas and Kaushik Chatterjee","doi":"10.1039/D5MA00390C","DOIUrl":"https://doi.org/10.1039/D5MA00390C","url":null,"abstract":"<p >Despite the advancements in additive manufacturing to prepare personalized implants of complex geometries, the additive manufacturing of Mg alloys has posed significant challenges. In this work, commercially pure (Cp) Mg and Mg–2Ag–2Sn alloys were additively manufactured <em>via</em> laser-powder bed fusion (L-PBF). Elemental powders were ball-milled to prepare the alloy powder for L-PBF. Optimized fabrication parameters were determined by preparing tracks at varying laser parameters. Non-spherical powders could be successfully utilized in this process. Microstructural analysis by optical microscopy, X-ray diffraction, scanning electron microscopy, and energy-dispersive X-ray spectroscopy revealed the presence of different phases, including some Al uptakes from the substrate. Hardness studies revealed a 63% increase in the hardness of the Mg–2Ag–2Sn alloy compared to Cp Mg. Additionally, the fabricated Mg–2Ag–2Sn alloy system demonstrated almost two-and-a-half-fold improved corrosion resistance than Cp–Mg, making it potentially viable for orthopaedic implants. This study demonstrates the fabrication of Cp Mg <em>via</em> additive manufacturing by laser powder bed fusion (LPBF), accompanied by systematic optimization of the processing parameters. Furthermore, a comparative analysis between pure Mg and the Mg–2Ag–2Sn alloy is conducted to evaluate their properties. The results demonstrate that LPBF is a promising process for the advanced manufacturing of Mg-based alloys for biomedical applications.</p>","PeriodicalId":18242,"journal":{"name":"Materials Advances","volume":" 18","pages":" 6243-6256"},"PeriodicalIF":4.7,"publicationDate":"2025-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/ma/d5ma00390c?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145062105","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Platinum catalyst-functionalized cylindrical graft copolymer micelles for dual catalytic and cytotoxic activity†","authors":"Kyosuke Seryu, Chieri Inada and Tomoki Nishimura","doi":"10.1039/D5MA00518C","DOIUrl":"https://doi.org/10.1039/D5MA00518C","url":null,"abstract":"<p >Catalytic prodrug activation offers a promising approach to cancer therapy, but integrating catalytic and therapeutic functions within a single platform remains challenging. In addition, low-molecular weight metal catalysts suffer from rapid clearance and limited <em>in vivo</em> efficacy. Here, we present a platinum complex-conjugated polymeric micellar system, constructed from amphiphilic poly(acrylic acid)-<em>graft</em>-poly(propylene oxide), which self-assembles into short cylindrical micelles (<em>ca.</em> 50 nm in length) in aqueous solution. The micelles are functionalized with a cisplatin-derived Pt(<small>IV</small>) metal complex, which is released under reductive conditions and converted into catalytically active Pt(<small>II</small>) species capable of deprotecting an <em>N</em>-propargylated 5-fluorouracil prodrug. The catalytic transformation proceeds more efficiently under mildly acidic conditions (pH = 6.0), achieving up to 35% conversion after 96 hours. Cell viability assays using CT26 cancer cells showed a decrease in viability from 60% (Pt-micelle alone) to below 50% when combined with the prodrug, indicating dual catalytic and cytotoxic activity <em>in vitro</em>. These findings provide a proof-of-concept for a dual-functional nanocarrier system capable of localized prodrug activation and therapeutic action, offering a promising strategy for advancing metal-catalyzed cancer therapy.</p>","PeriodicalId":18242,"journal":{"name":"Materials Advances","volume":" 17","pages":" 6001-6007"},"PeriodicalIF":4.7,"publicationDate":"2025-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/ma/d5ma00518c?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144909513","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}