{"title":"Anisotropic Redox on Pristine Graphene","authors":"Akshat R. Saraf, Jay Min Lim, Ravi F. Saraf","doi":"10.1002/admi.202400374","DOIUrl":"https://doi.org/10.1002/admi.202400374","url":null,"abstract":"<p>Chemically modified graphene is an attractive electrode material for electrocatalysis, energy devices, and sensors, whereas pristine graphene is electrochemically passive. The remarkable anisotropic electrochemical nature of graphene is uncovered by <i>π–π</i> interaction, making pristine graphene more active than bare Au. The <i>π–π</i> stacking during redox reaction “dopes” the graphene, disrupting the passivating hydration layer, making it a facile electrochemical electrode. The structure during <i>π–π</i> stacking-mediated redox of methylene blue (MB) is quantitatively measured by the differential reflectivity of a polarized laser on a ≈100 micron spot. The local redox reaction current varies over fourfold due to the orientation of the ≈10 micron size grains. The mosaic-grain anisotropy on each spot shows local uniaxial orientation. The redox signal at the optimum orientation is over 2.5-fold greater than that for bare Au on the same electrode. The redox signal is over fivefold greater at the edges of graphene compared bare Au. Remarkably, the <i>π–π</i> interaction increases chemical stability significantly, leading to negligible photo-degradation at the approximate absorption wavelength of MB. The exclusive redox activity due to <i>π–π</i> interaction on pristine graphene adds to the toolbox of making exotic opto-electrochemical electrode materials for electrocatalysis, sensing, and electronics.</p>","PeriodicalId":115,"journal":{"name":"Advanced Materials Interfaces","volume":"11 32","pages":""},"PeriodicalIF":4.3,"publicationDate":"2024-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/admi.202400374","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142641886","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Nafise Elahpour, Isabella Niesner, Nora Abdellaoui, Boris Michael Holzapfel, Lukas Gritsch, Edouard Jallot, Susanne Mayer-Wagner, Jonathan Lao
{"title":"Antibacterial Therapeutic Ions Incorporation into Bioactive Glasses as a Winning Strategy against Antibiotic Resistance","authors":"Nafise Elahpour, Isabella Niesner, Nora Abdellaoui, Boris Michael Holzapfel, Lukas Gritsch, Edouard Jallot, Susanne Mayer-Wagner, Jonathan Lao","doi":"10.1002/admi.202400068","DOIUrl":"https://doi.org/10.1002/admi.202400068","url":null,"abstract":"<p>This work focuses on combating bacterial infections in bone tissue using metal elements embedded in bioactive glass. While there is an urgent need for alternative methods with a shrinking number of effective treatment options untouched by antimicrobial resistance, it is crucial to first understand the mechanisms of pathogenesis, persistence, and bacterial resistance in skeletal infection, and then develop effective counterstrategies and innovative alternatives. This review considers the role of antimicrobial metal ions, their mechanism of action, and their incorporation into bioactive glass formulations as these materials can serve as delivery platforms with the least possible complexities. Furthermore, the bacterial infection risk in bone is also examined with specific attention to antibiotic resistance and biofilm formation. This review sheds light on the most promising materials as novel antibacterial agents by presenting a wide range of possible bioactive glass formulations equipped with potential antibacterial ions and in vitro/ in vivo insights, and it also reinforces the importance of continuing studies to develop multi-faceted antibacterial bioactive glasses.</p>","PeriodicalId":115,"journal":{"name":"Advanced Materials Interfaces","volume":"11 32","pages":""},"PeriodicalIF":4.3,"publicationDate":"2024-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/admi.202400068","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142641887","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Michael McKinlay, Lewis Fleming, Manuel Pelayo García, Lucía Nieto Sierra, Pilar Villar Castro, Daniel Araujo, Basilio Javier García, Des Gibson, Carlos García Nuñez
{"title":"On the Piezoelectric Properties of Zinc Oxide Thin Films Synthesized by Plasma Assisted DC Sputter Deposition","authors":"Michael McKinlay, Lewis Fleming, Manuel Pelayo García, Lucía Nieto Sierra, Pilar Villar Castro, Daniel Araujo, Basilio Javier García, Des Gibson, Carlos García Nuñez","doi":"10.1002/admi.202400252","DOIUrl":"https://doi.org/10.1002/admi.202400252","url":null,"abstract":"<p>This work presents a study of piezoelectric zinc oxide (ZnO) thin films deposited by a novel post-reactive sputtering method. The process utilizes a rotating drum with DC magnetron sputtering deposition onto substrates with subsequent DC plasma-assisted oxidation of the deposited metal to metal oxide. The paper analyzes the influence of plasmaassisted magnetron sputtering (PA-MS) deposition parameters (O<sub>2</sub> plasma source power, O<sub>2</sub> flow, and Ar flow) on the morphological, structural, optical, and piezoelectric properties of ZnO thin films. Design of experiments has been utilized to evaluate the role of these parameters on the growth rate (<i>r</i><sub>g</sub>) and the properties of resulting films. Results indicate a predominant influence of the plasma power on the <i>r</i><sub>g</sub> over other parameters. Among the eight tested samples, three of them show high crystal quality with high intensity (0001) diffraction peak, characteristic of the wurtzite crystalline structure of ZnO, and one of them exhibits piezoelectric coefficient values of ≈11pC N<sup>−1</sup>. That sample corresponding to a ZnO film deposited at the lowest <i>r</i><sub>g</sub> of 0.075 nm s<sup>−1</sup>, confirmed the key role of the deposition parameters on the piezoelectric response of films, and demonstrated PA-MS as a promising technique to produce high-quality piezoelectric thin films.</p>","PeriodicalId":115,"journal":{"name":"Advanced Materials Interfaces","volume":"11 32","pages":""},"PeriodicalIF":4.3,"publicationDate":"2024-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/admi.202400252","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142641661","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Sudheer Kumar Yadav, Daniel Deckenbach, Sandeep Yadav, Christian Njel, Vanessa Trouillet, Jörg J. Schneider
{"title":"CoFe2O4@N-CNH as Bifunctional Hybrid Catalysts for Rechargeable Zinc-Air Batteries (Adv. Mater. Interfaces 28/2024)","authors":"Sudheer Kumar Yadav, Daniel Deckenbach, Sandeep Yadav, Christian Njel, Vanessa Trouillet, Jörg J. Schneider","doi":"10.1002/admi.202470068","DOIUrl":"https://doi.org/10.1002/admi.202470068","url":null,"abstract":"<p><b>Bifunctional Catalysts</b></p><p>Cobalt ferrite nanoparticle catalysts generated from homoleptic iron and cobalt urea complexes and deposited onto dahlia like arrangements of nitrogen doped carbon nanohorns are shown on the le: side. These carbon/ferrite composites convert molecular oxygen into hydroxyl ions and back to oxygen (right side) and are thus efficient catalysts to drive a secondary zinc/air battery with high efficiency. More details can be found in article 2400415 by Jörg J. Schneider and co-workers. Image art by Dr. Sherif Okeil.\u0000\u0000 <figure>\u0000 <div><picture>\u0000 <source></source></picture><p></p>\u0000 </div>\u0000 </figure></p>","PeriodicalId":115,"journal":{"name":"Advanced Materials Interfaces","volume":"11 28","pages":""},"PeriodicalIF":4.3,"publicationDate":"2024-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/admi.202470068","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142404451","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ignasia Handipta Mahardika, Jeong-Hyeop Shin, Jutiporn Yukird, Sang Ho Lee, Nayoon Pyun, Byung-Keun Oh, Kwanwoo Shin
{"title":"From Pregnancy to Pathogens: Boosting Lateral Flow Assays Sensitivity with a Hydrogel Reaction Trap (Adv. Mater. Interfaces 27/2024)","authors":"Ignasia Handipta Mahardika, Jeong-Hyeop Shin, Jutiporn Yukird, Sang Ho Lee, Nayoon Pyun, Byung-Keun Oh, Kwanwoo Shin","doi":"10.1002/admi.202470066","DOIUrl":"https://doi.org/10.1002/admi.202470066","url":null,"abstract":"<p><b>Hydrogel Reaction Trap</b></p><p>The cover image of the article 2400341 by Kwanwoo Shin and co-workers showcases a simple, cost-effective method to enhance the sensitivity of lateral flow assay (LFA) kits. By using a drop-casting process to apply a hydrogel reaction trap, the flow rate and reaction time are optimized, significantly boosting diagnostic performance. This method can increase the sensitivity of commercial LFA kits by up to sevenfold.\u0000\u0000 <figure>\u0000 <div><picture>\u0000 <source></source></picture><p></p>\u0000 </div>\u0000 </figure></p>","PeriodicalId":115,"journal":{"name":"Advanced Materials Interfaces","volume":"11 27","pages":""},"PeriodicalIF":4.3,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/admi.202470066","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142316833","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Marco Natali, Andrea Ciavatti, Matteo Verdi, Margherita Taddei, Franco Corticelli, Mario Prosa, Mirko Seri, Giampiero Ruani, Michele Muccini, Stefano Toffanin, Margherita Bolognesi, Beatrice Fraboni
{"title":"Air-Stable and Flexible Photodiode for X-Rays Detection Based on a Hybrid Perovskite Active Layer and Organic Interlayers","authors":"Marco Natali, Andrea Ciavatti, Matteo Verdi, Margherita Taddei, Franco Corticelli, Mario Prosa, Mirko Seri, Giampiero Ruani, Michele Muccini, Stefano Toffanin, Margherita Bolognesi, Beatrice Fraboni","doi":"10.1002/admi.202300968","DOIUrl":"https://doi.org/10.1002/admi.202300968","url":null,"abstract":"Solution-processed organic and hybrid semiconductor materials have great potential for ionizing radiation direct detection, as they combine high sensitivity, low-power consumption, and flexibility. There is, however, an open challenge related to the stability in ambient/operational conditions of this class of devices. In this work, an air-stable, solution-processed and flexible X-ray detector is reported, based on the integration of hybrid perovskite and organic thin films used as active layer and functional interlayers, respectively. The diode architecture and the engineering of the interface between the hybrid perovskite and the organic hole transporting material (solvent-modified poly(3,4-ethylenedioxythiophene):polystyrene sulfonate) is the key to achieve enhanced detector's air stability and performance. The unencapsulated flexible device, measured in air and in passive operation (0 V), shows a limit-of-detection of 0.37 ± 0.04 µGy s<sup>−1</sup> and a sensitivity as high as 5.2 µC Gy<sup>−1</sup> cm<sup>−2</sup>, which is retained within 25% after 42 days exposure to ambient conditions.","PeriodicalId":115,"journal":{"name":"Advanced Materials Interfaces","volume":"41 1","pages":""},"PeriodicalIF":5.4,"publicationDate":"2024-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142252831","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Coupling Charge-Regulated Interfacial Chemistry to Electrokinetic Ion Transport in Bipolar SiO2-Al2O3 Nanofluidic Diodes","authors":"Alexander Eden, Sumita Pennathur","doi":"10.1002/admi.202400495","DOIUrl":"https://doi.org/10.1002/admi.202400495","url":null,"abstract":"Due to the surface-dominant nature of electrokinetic ion transport in confined geometries, ionic currents in nanofluidic channels are fundamentally governed by the interfacial chemistry of the constituent substrates. In this work, the intrinsic coupling between charge-regulated oxide surfaces and local changes in concentration and pH induced during the operation of bipolar nanofluidic diodes is numerically explored. Using a heterogeneous SiO<sub>2</sub>-Al<sub>2</sub>O<sub>3</sub> nanochannel as a representative example, field-dependent ion accumulation and depletion effects are shown to have a marked effect on the local surface chemistry and resulting charge density of the amphoteric Al<sub>2</sub>O<sub>3</sub> surface in particular. While the SiO<sub>2</sub> surface tends to remain relatively indifferent to the presence of an applied potential due to its low point of zero charge (PZC), the comparatively high PZC of Al<sub>2</sub>O<sub>3</sub> renders it much more susceptible to the extent of ion accumulation and depletion events which drive localized concentration and pH changes. Including this surface coupling in models can be necessary to capture the true behavior of real-world devices; comparison with a fixed-charge model demonstrates that only a fully coupled model can quantitatively reproduce reported experimental current measurements in heterogeneous SiO<sub>2</sub>-Al<sub>2</sub>O<sub>3</sub> nanochannels, the limiting behavior of which is revealed to stem from this surface-to-bulk coupling.","PeriodicalId":115,"journal":{"name":"Advanced Materials Interfaces","volume":"54 1","pages":""},"PeriodicalIF":5.4,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142252895","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Nicola Antonio Di Spirito, Wanli Liu, Stephen Williams, Adam M. Squires, Mirella Di Lorenzo
{"title":"Green Synthesis of Catalytic 3D Platinum Nanostructures from a Body-Centered Cubic Pluronic Micellar Array Template","authors":"Nicola Antonio Di Spirito, Wanli Liu, Stephen Williams, Adam M. Squires, Mirella Di Lorenzo","doi":"10.1002/admi.202400446","DOIUrl":"https://doi.org/10.1002/admi.202400446","url":null,"abstract":"Ordered and well-interconnected 3D electrode nanostructures open up exciting perspectives in catalysis, sensing and energy harvesting. Here, highly ordered 3D nano-sized Pt mesoporous structures based on the I-Wrapped Package (I-WP) architecture with 13.5 nm unit cell size, previously unreported for metal nanomaterials, are presented. The samples are synthetized by soft-template electrodeposition, using the body-centred cubic (BCC) lyotropic crystalline micellar phase of Pluronic F68 as the template. The specific surface area of the resulting Pt nanoarchitecture is 36 ± 13 m<sup>2</sup> g<sup>−1</sup>. The oxygen reduction reaction kinetic current is 0.98 mA cm<sup>−2</sup>; the current density normalized by the electrochemical active surface area and the weight of deposited Pt are 0.92 mA cm<sup>−2</sup> and 153.53 A g<sup>−1</sup>, respectively, showing superior properties than conventional Pt nanostructures produced by surfactant templates. These results suggest a nanostructure based on the topology of the I-WP minimal surface, representing the first case at this length scale from a metallic material, opening up new research directions in fundamental physics based on predicted thermal and phononic properties for this topology. The water-based template provides a chemical-free, eco-friendly route for ordered mesoporous conductive nanomaterials manufacturing, inspiring future trends in the field.","PeriodicalId":115,"journal":{"name":"Advanced Materials Interfaces","volume":"42 1","pages":""},"PeriodicalIF":5.4,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142252896","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}