RSC Applied Interfaces最新文献

{"title":"Non-cytotoxic molybdenum-based nanostructures as effective radical scavengers†","authors":"Stefania Mura, Pietro Rassu, Usama Anwar, Davide De Forni, Barbara Poddesu, Franco Lori and Plinio Innocenzi","doi":"10.1039/D5LF00085H","DOIUrl":"https://doi.org/10.1039/D5LF00085H","url":null,"abstract":"<p >Sodium molybdate is a potential candidate as an effective antioxidant even if no significant proof of its antioxidant properties has been reported so far, especially for nanoparticles. In the present work, we have synthesised sodium molybdate nanoparticles using MoS<small>₂</small> and NaOH as precursors. After thermal treatment at 200 °C for 20 hours, sodium molybdate nanoparticles with an average dimension of 26 nm have been obtained. An intermediate treatment time of 8 hours gives nanoparticles with a mixed composition, MoS<small>₂</small>–Na<small>₂</small>MoO<small>₄</small>. The nanoparticles have been characterized using Raman and infrared spectroscopy, X-ray diffraction, atomic force microscopy and dynamic light scattering. The radical scavenging capability has been tested using 1,1-diphenyl-2-picrylhydrazyl as a molecular probe. Both pure Na<small>₂</small>MoO<small>₄</small> and the heterostructured MoS<small>₂</small>–Na<small>₂</small>MoO<small>₄</small> nanoparticles have exhibited excellent radical scavenging activity in aqueous solutions, with MoS<small>₂</small>–Na<small>₂</small>MoO<small>₄</small> showing an enhanced response. Another test has been conducted in the solid state, introducing the nanoparticles within a mesoporous titania film matrix. The high photocatalytic activity of titania has been completely quenched by the presence of the sodium molybdate nanoparticles. Finally, <em>in vitro</em> studies using Hep G2 cells further confirmed the antioxidant capacity of the nanoparticles without inducing cytotoxicity. These findings suggest that sodium molybdate nanoparticles are promising candidates for biomedical and environmental applications, particularly in reducing oxidative stress.</p>","PeriodicalId":101138,"journal":{"name":"RSC Applied Interfaces","volume":" 5","pages":" 1299-1310"},"PeriodicalIF":0.0,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/lf/d5lf00085h?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145021469","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":"Functionalizing graphene oxide in polysulfone composite adsorption cartridges through in-flow, in situ treatment†","authors":"Angela Pintus, Andrea Trifoglio, Sara Khaliha, Sebastiano Mantovani, Davide Paci, Alessandro Kovtun, Letizia Bocchi and Manuela Melucci","doi":"10.1039/D5LF00105F","DOIUrl":"https://doi.org/10.1039/D5LF00105F","url":null,"abstract":"<p >We present a scalable chemical method to upcycle polysulfone–graphene oxide (PSU–GO) industrial waste into customized adsorbent materials through <em>in situ</em>, in flow <small>L</small>-lysine functionalization of GO embedded in the polymer composite. Enhanced carbamazepine removal from water is demonstrated for PSU–GOLys filled cartridges.</p>","PeriodicalId":101138,"journal":{"name":"RSC Applied Interfaces","volume":" 4","pages":" 917-921"},"PeriodicalIF":0.0,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/lf/d5lf00105f?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144573084","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":"Vanadium pentoxide mesoporous cathodes for Li-ion batteries†","authors":"Andrea Palumbo, Ullrich Steiner, Andrea Dodero and Ilja Gunkel","doi":"10.1039/D5LF00033E","DOIUrl":"https://doi.org/10.1039/D5LF00033E","url":null,"abstract":"<p >The combination of micro- and nanoporosity is advantageous for Li-ion intercalation in battery electrodes. In this work, we synthesize porous 10 μm-sized poly(styrene-vinylpyridine) block copolymer particles <em>via</em> an emulsion-based approach. The vinylpyridine-phase was then subjected to methanol swelling to enable vanadium ions infiltration, followed by calcination to obtain mesoporous vanadium pentoxide particles. These exhibited a hierarchical porosity, and electrodes manufactured from them displayed a very high specific surface area. Two liquid electrolytes were compared to manage solid-electrolyte-interface growth, which can clog nanopores. Notably, the combination of a lithium bis(trifluoromethane)sulfonimide-containing tetraethylene glycol dimethyl ether tetraglyme electrolyte with the hierarchically porous vanadium pentoxide electrodes demonstrated a substantial enhancement in cycling performance, surpassing established industry benchmarks.</p>","PeriodicalId":101138,"journal":{"name":"RSC Applied Interfaces","volume":" 4","pages":" 1082-1090"},"PeriodicalIF":0.0,"publicationDate":"2025-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/lf/d5lf00033e?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144573080","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":"DNA origami adsorption at single-crystalline TiO2 surfaces†","authors":"Xiaodan Xu, Sandra Gołębiowska, Teresa de los Arcos, Guido Grundmeier and Adrian Keller","doi":"10.1039/D5LF00109A","DOIUrl":"https://doi.org/10.1039/D5LF00109A","url":null,"abstract":"<p >The immobilization of DNA origami nanostructures on solid surfaces is an important prerequisite for their application in many biosensors. So far, DNA origami immobilization has been investigated in detail only on a few surfaces such as mica, SiO<small>₂</small>, and graphite. TiO<small>₂</small> is a conductive oxide with extensive applications in photocatalysis, energy conversion, and (bio)sensing. Despite its great importance, however, TiO<small>₂</small> has not been investigated as a substrate for DNA origami immobilization yet. Here, we systematically investigate the adsorption of 2D DNA origami triangles on single-crystalline TiO<small>₂</small> surfaces under various experimental conditions. Interestingly, the effect of the Mg<small>²⁺</small> concentration on DNA origami surface coverage is found to depend on the orientation of the TiO<small>₂</small> surface. On TiO<small>₂</small>(110) and TiO<small>₂</small>(111), 10 mM Mg<small>²⁺</small> yields a higher surface coverage than 5 mM. However, the inverse is observed for the TiO<small>₂</small>(001) surface, where the lower Mg<small>²⁺</small> concentration leads to an increase in surface coverage by up to 75%. This is explained by the interplay between Mg<small>²⁺</small> binding to the DNA phosphates and Mg<small>²⁺</small> adsorption at the TiO<small>₂</small> surfaces, which in the case of TiO<small>₂</small>(001) results in a maximum density of Mg<small>²⁺</small> salt bridges already at a low Mg<small>²⁺</small> concentration. At higher concentrations, both the surface and the DNA phosphates are getting saturated with Mg<small>²⁺</small> ions, which introduces electrostatic repulsion at the TiO<small>₂</small>–DNA interface and thus lowers the surface coverage. Our results demonstrate that DNA origami surface coverage at different TiO<small>₂</small> surfaces can be controlled by the Mg<small>²⁺</small> concentration. However, the same mechanism may also play a role in DNA origami adsorption at other single-crystalline oxide surfaces.</p>","PeriodicalId":101138,"journal":{"name":"RSC Applied Interfaces","volume":" 4","pages":" 931-939"},"PeriodicalIF":0.0,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/lf/d5lf00109a?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144573086","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":"Asymmetric nanocavity: from color-selective reflector to broadband near-infrared absorber","authors":"Kirtan P. Dixit and Don A. Gregory","doi":"10.1039/D4LF00421C","DOIUrl":"https://doi.org/10.1039/D4LF00421C","url":null,"abstract":"<p >Advances in photonics and energy systems increasingly rely on engineering material interfaces to achieve multifunctional performance. In this study, we present a scalable, lithography-free design for asymmetric Fabry–Perot nanocavities (AFPNs) that function as both narrowband visible reflectors and broadband near-infrared absorbers. By utilizing a dielectric–semiconductor–dielectric spacer with silicon as a critical material, we demonstrate tunable color reflection with just a 5 nm thickness variation and over 80% broadband absorption across the 0.8–1.3 μm range. Adding an anti-reflection coating further extends absorption efficiency to near unity while preserving color fidelity. This planar architecture reduces angular sensitivity and eliminates the need for complex nanopatterning, addressing key challenges in scalability and optical efficiency. These findings highlight a versatile platform for optical coatings in display technologies, photovoltaics, and thermal emitters, advancing the design of multifunctional nanophotonic devices.</p>","PeriodicalId":101138,"journal":{"name":"RSC Applied Interfaces","volume":" 4","pages":" 1059-1068"},"PeriodicalIF":0.0,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/lf/d4lf00421c?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144573078","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":"Amino acid interactions dependent on the polymerization of charged residues and surface properties of monolayers†","authors":"Akira Nomoto, Kentaro Shiraki and Tsukuru Minamiki","doi":"10.1039/D5LF00069F","DOIUrl":"https://doi.org/10.1039/D5LF00069F","url":null,"abstract":"<p >Charged amino acids are the key residues that regulate protein function and stability, and successive sequences of charged amino acids contribute significantly to protein assembly. Therefore, an in-depth understanding of the strengths and manners of amino acid–amino acid interactions (AAIs) caused by successive sequences of charged residues is required. In this study, we prepared self-assembled monolayers (SAMs) bearing charged alkanethiols as ligands to mimic protein surfaces with accumulated charged amino acids. Moreover, we used peptides as analytes to evaluate the AAIs based on chain length. The strengths of the AAIs of tri- and tetrapeptides varied per residue, depending on the properties of the SAMs, such as their densities and hydrophobicities, whereas those of mono- and dipeptides did not vary significantly. Remarkably, the strengths of the AAIs per residue decreased significantly with increasing peptide length, even when the strengths of the AAIs increased at the peptide scale. These results enabled us to quantify the microscopic changes in the AAIs, in addition to the overall interactions governed by the reaction field and alignment of the charged amino acids. Our analysis of AAIs shall be beneficial in protein engineering <em>via</em> genetic mutations based on charged amino acids.</p>","PeriodicalId":101138,"journal":{"name":"RSC Applied Interfaces","volume":" 4","pages":" 976-983"},"PeriodicalIF":0.0,"publicationDate":"2025-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/lf/d5lf00069f?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144573132","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":"Functionalization of siliceous materials, part 4: immobilization of fluorinated dyes for optical chemical sensor applications","authors":"Saskia Czihal, Frank Bauer, Marko Bertmer, Axel Kahnt, Sergej Naumov, Matthias Lau and Dirk Enke","doi":"10.1039/D5LF00060B","DOIUrl":"https://doi.org/10.1039/D5LF00060B","url":null,"abstract":"<p >Porous glass (PG) particles are ideal supports in developing optical gas sensors as they combine fast mass transfer in macropores with large specific surface areas which are predestined for the deposition of indicator molecules. The well-established PG material is chemically stable and can be post-synthetically functionalized for introducing specific surface properties. Thus, surface functionalization with 3-mercaptopropyltrimethoxysilane (MPTMS) or 3-aminopropyl-triethoxysilane (APTES) provides the basis for the covalent coupling of the indicator molecule platinum(<small>II</small>)-5,10,15,20-<em>meso</em>-tetrakis-(2,3,4,5,6-pentafluorophenyl)-porphyrin (PtTFPP) to the sensor matrix, reducing the risk of migration, aggregation, and leaching of the fluorescent dye. Nucleophilic substitution of a fluorine atom of the pentafluorophenyl PtTFPP groups by amino (APTES) and thiol (MPTMS) groups enables a covalent linkage of the oxygen indicator PtTFPP to the PG surface. The spectroscopic detection of the PtTFPP-silica bonding by solid-state <small>¹³</small>C CP MAS NMR spectroscopy has turned out to be rather difficult due to very low indicator amounts. As an inexpensive alternative for PtTFPP, hexafluorobenzene C<small>₆</small>F<small>₆</small> was used successfully for the spectroscopic proof of covalent bonds between fluorophenyl groups of an indicator dye and amino- or mercapto-silane cross-linker molecules. The PtTFPP/MPTMS- and the PtTFPP/APTES-modified PG sensor particles showed no leaching in organic solvents and have been applied for oxygen sensing up to oxygen pressures of 400 mbar <em>p</em><small>_{O<small>₂</small>}</small>. The PG sensor particles show non-linear Stern–Volmer calibration plots and it has been found that the covalent bonding of PtTFPP <em>via</em> APTES linkage onto silica surfaces is better suited for various sensor applications.</p>","PeriodicalId":101138,"journal":{"name":"RSC Applied Interfaces","volume":" 4","pages":" 995-1007"},"PeriodicalIF":0.0,"publicationDate":"2025-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/lf/d5lf00060b?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144573027","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":"DNA-guided interparticle energy transfer between rare earth doped nanoparticles†","authors":"Mingrui Guo, Vivienne Tam, Fiorenzo Vetrone and Marta Cerruti","doi":"10.1039/D5LF00083A","DOIUrl":"https://doi.org/10.1039/D5LF00083A","url":null,"abstract":"<p >Rare earth doped nanoparticles (RENPs) emit upconverted radiation in the ultraviolet (UV), visible (vis), and higher energy near-infrared (NIR) range, and downshifted, lower NIR energy. Most RENP-based optical sensors depend on energy transfer between the RENP and another entity that emits UV/vis light upon detection of the target of interest. However, attenuation of the emitted UV/vis light by biological tissue components prevents <em>in vivo</em> sensing in deep tissue regions. To avoid this, we propose a sensor that works entirely in the NIR range, composed of two RENPs. The sensor is based on core@shell RENPs comprising Tm<small>³⁺</small> (energy donor) and Nd<small>³⁺</small> (energy absorber) ions doped in a LiYF<small>₄</small> host matrix, functionalized with complementary DNA strands. Hybridization of the DNA strands reduces interparticle distance allowing interparticle energy transfer (IPET) to occur, as shown by a decrease in intensity of the NIR emission from the Tm<small>³⁺</small> doped RENPs observed only in the presence of DNA-functionalized Nd<small>³⁺</small> doped RENPs. While previous works showed IPET occurring between RENPs held in close proximity by hydrophobic interactions between surface molecules, this work shows that responsive linkers (in our case, DNA) can be used to enable IPET. This result lays the foundation for an RENP-based NIR-excited and NIR-emitting optical sensor for deep tissue sensing.</p>","PeriodicalId":101138,"journal":{"name":"RSC Applied Interfaces","volume":" 4","pages":" 1069-1081"},"PeriodicalIF":0.0,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/lf/d5lf00083a?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144573079","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":"Effect of synergy on selective low-temperature dehydrogenation of propane to propylene over a defect-induced copper titanium catalyst†","authors":"Himanshu Raghav, Tuhin Suvra Khan, A. V. Sri Jyotsna, Piyush Gupta, Shailendra Tripathi and Bipul Sarkar","doi":"10.1039/D5LF00031A","DOIUrl":"https://doi.org/10.1039/D5LF00031A","url":null,"abstract":"<p >The TiO<small>₂</small>-supported Cu catalyst exhibits high activity in the dehydrogenation of propane at low temperatures, enabling the selective production of propylene over a prolonged period. The defect-induced Cu–TiO<small>₂</small> catalyst provided a propylene yield of 10.4% with high selectivity (∼91.9%) even at 375 °C. Surface analysis shows that the defects on the TiO<small>₂</small> surface are extrinsic and arise from doping with Cu entities. This enhanced metal–support synergy between Cu and TiO<small>₂</small> passivates C–C bond breaking, which indirectly reduces methane formation. To understand the effect of different Cu planes on the adsorption of propane molecules for their activation and conversion, the DFT-optimized geometry and reaction coordinates were investigated. The DFT study revealed that the Cu–TiO<small>₂</small> surface enhances C–H activation at lower temperatures while maintaining an encouraging propylene yield. Furthermore, the kinetic study suggests that adsorption is the rate-limiting step besides the surface reaction, and the activation energy for the propane dehydrogenation reaction is 50.04 kJ mol<small>⁻¹</small>.</p>","PeriodicalId":101138,"journal":{"name":"RSC Applied Interfaces","volume":" 4","pages":" 984-994"},"PeriodicalIF":0.0,"publicationDate":"2025-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/lf/d5lf00031a?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144573133","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":"Cathodically electrodeposited nitrogen-doped carbon dot–acrylic nanocomposite coatings: a dual-function corrosion barrier and real-time corrosion sensor†","authors":"Sushmit Sen, Amrita Chatterjee, Keshav Dev, Shakshi Bhardwaj and Pradip K. Maji","doi":"10.1039/D5LF00058K","DOIUrl":"https://doi.org/10.1039/D5LF00058K","url":null,"abstract":"<p >In this study, nitrogen-doped carbon dots (N-CDs) were successfully incorporated into an acrylic-based cathodic electrodeposition (CED) coating to develop an advanced nanocomposite system. The N-CDs, synthesized <em>via</em> a hydrothermal method, were directly integrated into the electrodeposition bath without requiring isolation, simplifying the fabrication process. The resulting coatings demonstrated enhanced mechanical strength, improved adhesion, and superior corrosion resistance compared to conventional acrylic coatings, increasing the impedance by a factor of 10<small>⁴</small>. In addition, the fluorescence quenching property of N-CDs in the presence of Al<small>³⁺</small> was utilized for real-time corrosion monitoring. A simple pH-paper-like sensor was fabricated using N-CDs as an ink, enabling naked-eye detection of aluminum corrosion through a “turn-off” fluorescence mechanism. This dual functionality—both as a corrosion barrier and a corrosion sensor—presents a novel approach to material protection and monitoring. This study highlights the potential of N-CDs in the development of next-generation intelligent coatings for structural materials.</p>","PeriodicalId":101138,"journal":{"name":"RSC Applied Interfaces","volume":" 5","pages":" 1220-1236"},"PeriodicalIF":0.0,"publicationDate":"2025-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/lf/d5lf00058k?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145021462","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}