The accelerating development of solar energy conversion technology has raised an urgent demand for high-performance antireflective (AR) materials to enhance photon transmission. However, conventional AR materials are constrained by limited spectral bandwidth and pronounced angular dependence, leading to significant reductions in photon transmission under broadband and wide-angle conditions. Herein, we propose a broadband omnidirectional antireflective (BOAR) film with unique nanocone-grid-like (NCGL) hybrid structures, inspired by dragonfly wings. Optical characterization reveals that the biomimetic NOA61 film with the NCGL structure achieves approximately 96.3% transmittance in the visible spectrum at normal incidence, which is about 3.7% higher than that of the smooth NOA61 film. This transmittance enhancement remains at ∼2.9% within a 30° incidence range, and even at an extreme 75° incidence, the transmittance still reaches ∼78%. The excellent optical performance stems from the continuous, effective refractive index gradient constructed by the NCGL structure, which enables a smooth optical transition from air to the substrate by mitigating interfacial optical discontinuities. Moreover, the biomimetic BOAR film exhibits good environmental stability and mechanical properties. Notably, under AM1.5G simulated solar illumination at 25 °C, the solar panel integrated with the NOA61 film exhibits a 36.6% relative improvement in power conversion efficiency compared to that with the smooth film. In the 350-900 nm spectral range, the structured NOA61 film achieves an average 2.9% enhancement in external quantum efficiency. These results confirm that the NCGL hybrid structure enhances transmittance by suppressing Fresnel reflection, thereby increasing the photon flux into the active layer. This work provides new design principles for developing high-performance optical interfaces in photoelectric and photothermal conversion systems.
{"title":"Broadband and omnidirectional antireflective film with bioinspired nanocone-grid hybrid structures for enhanced solar energy harvesting.","authors":"Zhibin Jiao,Shuhan Zhang,Chuanhao Zhao,Xueyang Li,Zhaozhi Wang,Jing Zhao,Hanliang Ding,Bo Li,Shichao Niu,Zhiwu Han","doi":"10.1039/d5nr03946k","DOIUrl":"https://doi.org/10.1039/d5nr03946k","url":null,"abstract":"The accelerating development of solar energy conversion technology has raised an urgent demand for high-performance antireflective (AR) materials to enhance photon transmission. However, conventional AR materials are constrained by limited spectral bandwidth and pronounced angular dependence, leading to significant reductions in photon transmission under broadband and wide-angle conditions. Herein, we propose a broadband omnidirectional antireflective (BOAR) film with unique nanocone-grid-like (NCGL) hybrid structures, inspired by dragonfly wings. Optical characterization reveals that the biomimetic NOA61 film with the NCGL structure achieves approximately 96.3% transmittance in the visible spectrum at normal incidence, which is about 3.7% higher than that of the smooth NOA61 film. This transmittance enhancement remains at ∼2.9% within a 30° incidence range, and even at an extreme 75° incidence, the transmittance still reaches ∼78%. The excellent optical performance stems from the continuous, effective refractive index gradient constructed by the NCGL structure, which enables a smooth optical transition from air to the substrate by mitigating interfacial optical discontinuities. Moreover, the biomimetic BOAR film exhibits good environmental stability and mechanical properties. Notably, under AM1.5G simulated solar illumination at 25 °C, the solar panel integrated with the NOA61 film exhibits a 36.6% relative improvement in power conversion efficiency compared to that with the smooth film. In the 350-900 nm spectral range, the structured NOA61 film achieves an average 2.9% enhancement in external quantum efficiency. These results confirm that the NCGL hybrid structure enhances transmittance by suppressing Fresnel reflection, thereby increasing the photon flux into the active layer. This work provides new design principles for developing high-performance optical interfaces in photoelectric and photothermal conversion systems.","PeriodicalId":92,"journal":{"name":"Nanoscale","volume":"19 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145704430","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}
Sahil Sahoo, Andre Yaroshevsky, Dima Cheskis, Yuri Gorodetski
We present a comprehensive study on the spatio-temporal weak–measurement of a chiral ultrafast optical pulse. We create a chiral vector wave packet by transmitting ultrashort laser pulse via a birefringent or magneto-optic medium. Employing time-resolved leakage radiation microscopy, we examine how the real and imaginary components of the weak–value parameter (ε) influence pulse propagation over time. Our technique allows us to detect and categorize the temporal polariza- tion fluctuation in a 75 f s pulse with an excellent repeatability. The achieved experimental results demonstrate a satisfactory consistency with the theoretical predictions.
{"title":"Spatio – Temporal Weak Measurement of Chiral Ultrashort Laser Pulse","authors":"Sahil Sahoo, Andre Yaroshevsky, Dima Cheskis, Yuri Gorodetski","doi":"10.1039/d5nr03443d","DOIUrl":"https://doi.org/10.1039/d5nr03443d","url":null,"abstract":"We present a comprehensive study on the spatio-temporal weak–measurement of a chiral ultrafast optical pulse. We create a chiral vector wave packet by transmitting ultrashort laser pulse via a birefringent or magneto-optic medium. Employing time-resolved leakage radiation microscopy, we examine how the real and imaginary components of the weak–value parameter (ε) influence pulse propagation over time. Our technique allows us to detect and categorize the temporal polariza- tion fluctuation in a 75 f s pulse with an excellent repeatability. The achieved experimental results demonstrate a satisfactory consistency with the theoretical predictions.","PeriodicalId":92,"journal":{"name":"Nanoscale","volume":"4 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145704820","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}
West Kristian Paraiso,Carlos Palacín Ramos,Parisa Mishal Hossain,Carla Alvarez Gordi,Pablo Adrian Guillen-Poza,Sebastián Zagmutt,Sabina Quader,Rosalía Rodríguez-Rodríguez
For therapeutics to reach the brain, the several administration routes available come with some disadvantages, with the primary biological obstacle being the blood-brain barrier (BBB), which is not easy to penetrate despite the sophisticated technologies which have been developed. In addition, reaching specific brain structures invokes additional challenges, entailing more complicated delivery strategies. Nose-to-brain (N2B) delivery or the intranasal (IN) administration route provides a less invasive alternative. With the wealth of knowledge available on N2B delivery of nanomedicines and biotherapeutics, there is an opportunity to synthesize the current literature, especially in terms of promising strategies to improve N2B delivery of nanomedicines, highlighting experimental evaluation and translational challenges. We also emphasized the latest advancements in experimental models for nasal delivery. Aiming to bridge the gap between bench research and clinical application, we reviewed the cases of insulin and oxytocin, two biotherapeutics with high clinical potential for CNS-related diseases, and explore how nanomedicine-based platforms can enhance their effectiveness. This review offers a roadmap for overcoming barriers and accelerating the clinical translation of N2B therapeutics.
{"title":"Overcoming barriers: nanomedicine-based strategies for nose-to-brain delivery.","authors":"West Kristian Paraiso,Carlos Palacín Ramos,Parisa Mishal Hossain,Carla Alvarez Gordi,Pablo Adrian Guillen-Poza,Sebastián Zagmutt,Sabina Quader,Rosalía Rodríguez-Rodríguez","doi":"10.1039/d5nr02259b","DOIUrl":"https://doi.org/10.1039/d5nr02259b","url":null,"abstract":"For therapeutics to reach the brain, the several administration routes available come with some disadvantages, with the primary biological obstacle being the blood-brain barrier (BBB), which is not easy to penetrate despite the sophisticated technologies which have been developed. In addition, reaching specific brain structures invokes additional challenges, entailing more complicated delivery strategies. Nose-to-brain (N2B) delivery or the intranasal (IN) administration route provides a less invasive alternative. With the wealth of knowledge available on N2B delivery of nanomedicines and biotherapeutics, there is an opportunity to synthesize the current literature, especially in terms of promising strategies to improve N2B delivery of nanomedicines, highlighting experimental evaluation and translational challenges. We also emphasized the latest advancements in experimental models for nasal delivery. Aiming to bridge the gap between bench research and clinical application, we reviewed the cases of insulin and oxytocin, two biotherapeutics with high clinical potential for CNS-related diseases, and explore how nanomedicine-based platforms can enhance their effectiveness. This review offers a roadmap for overcoming barriers and accelerating the clinical translation of N2B therapeutics.","PeriodicalId":92,"journal":{"name":"Nanoscale","volume":"1 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145696629","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}
Xuan Yang,Lixin Xuan,Weiwei Men,Muwen Niu,Xiao Wu,Jingyu Bi,Lei Qian
In this work, Ag nanoparticle-immobilized carbon fiber felt metacomposites (CFF@PDA-Ag) were first fabricated by a chemical-plating method to achieve multi-strategy modulation of their negative dielectric properties. Three routes including Ag nanoparticle content regulation, heat treatment and compression were developed, and their effects on the negative dielectric performance were investigated. It was found that with the increase of deposited Ag nanoparticles, negative permittivity was achieved for the metacomposite with 15 wt% Ag nanoparticles (CFF@PDA-Ag15), resulting from the formation of three-dimensional conductive networks. After heating at 500 °C, the permittivity of CFF@PDA-Ag11 changed from a positive to negative value, which was attributed to its enhanced ac conductivity owing to the grain activation and interparticle bonding of melted Ag nanoparticles. In addition, the results indicated that the dynamic process also adjusted its dielectric properties. After compression, negative permittivity of CFF@PDA-Ag11 was observed and the corresponding absolute value increased with further compression. In addition, the Drude and parallel models composed of conductive carbon fibers and an air phase were used to explain the regulation mechanism of negative permittivity. This work developed a multi-strategy method for achieving adjustable negative permittivity based on Ag nanoparticles, and demonstrated its importance and significance for the development of novel metacomposites.
{"title":"Multi-strategy modulation towards negative dielectric properties in Ag nanoparticle-immobilized carbon fiber felt metacomposites.","authors":"Xuan Yang,Lixin Xuan,Weiwei Men,Muwen Niu,Xiao Wu,Jingyu Bi,Lei Qian","doi":"10.1039/d5nr04255k","DOIUrl":"https://doi.org/10.1039/d5nr04255k","url":null,"abstract":"In this work, Ag nanoparticle-immobilized carbon fiber felt metacomposites (CFF@PDA-Ag) were first fabricated by a chemical-plating method to achieve multi-strategy modulation of their negative dielectric properties. Three routes including Ag nanoparticle content regulation, heat treatment and compression were developed, and their effects on the negative dielectric performance were investigated. It was found that with the increase of deposited Ag nanoparticles, negative permittivity was achieved for the metacomposite with 15 wt% Ag nanoparticles (CFF@PDA-Ag15), resulting from the formation of three-dimensional conductive networks. After heating at 500 °C, the permittivity of CFF@PDA-Ag11 changed from a positive to negative value, which was attributed to its enhanced ac conductivity owing to the grain activation and interparticle bonding of melted Ag nanoparticles. In addition, the results indicated that the dynamic process also adjusted its dielectric properties. After compression, negative permittivity of CFF@PDA-Ag11 was observed and the corresponding absolute value increased with further compression. In addition, the Drude and parallel models composed of conductive carbon fibers and an air phase were used to explain the regulation mechanism of negative permittivity. This work developed a multi-strategy method for achieving adjustable negative permittivity based on Ag nanoparticles, and demonstrated its importance and significance for the development of novel metacomposites.","PeriodicalId":92,"journal":{"name":"Nanoscale","volume":"31 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145696628","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}
Bing Liu, Lin Yan, Jing Ma, Chaohui Liu, Peng Xiao
The electrochemical CO2 reduction reaction (CO2RR) to carbon monoxide (CO) represents a promising route for sustainable fuel production and carbon neutrality. While bimetallic catalysts often exhibit superior performance, the fundamental understanding of how their structure governs activity and selectivity, particularly under varying reaction temperatures, remains limited. Herein, we report an atomically precise titanium-silver bimetallic nanocluster catalyst (Ti5Ag) as an ideal model system to unravel the temperature-dependent behavior in CO2RR. This catalyst achieves a maximum CO Faradaic efficiency (FECO) of ~60% and a yield rate of ~64 mmol·g-1·h-1. A strong temperature-dependent catalytic performance was discovered: elevated reaction temperature (55°C) dramatically enhances activity by reducing interfacial resistances by 1-2 orders of magnitude. In contrast, lowered temperature (-1°C) favors superior CO selectivity by suppressing the competing hydrogen evolution reaction (HER) more effectively. Mechanistic studies identify the surface reduction of COOH* to CO* as the rate-determining step (RDS) with a Tafel slope of 50-56 mV/dec. This study transcends the conventional catalyst screening by providing deep mechanistic insights into reaction dynamics, offering a new design principle for efficient CO2 conversion catalysts through the manipulation of operational temperature.
{"title":"Temperature-dependent electrochemical CO2-to-CO conversion on the bimetallic Ti-Ag nanocluster","authors":"Bing Liu, Lin Yan, Jing Ma, Chaohui Liu, Peng Xiao","doi":"10.1039/d5nr03587b","DOIUrl":"https://doi.org/10.1039/d5nr03587b","url":null,"abstract":"The electrochemical CO2 reduction reaction (CO2RR) to carbon monoxide (CO) represents a promising route for sustainable fuel production and carbon neutrality. While bimetallic catalysts often exhibit superior performance, the fundamental understanding of how their structure governs activity and selectivity, particularly under varying reaction temperatures, remains limited. Herein, we report an atomically precise titanium-silver bimetallic nanocluster catalyst (Ti5Ag) as an ideal model system to unravel the temperature-dependent behavior in CO2RR. This catalyst achieves a maximum CO Faradaic efficiency (FECO) of ~60% and a yield rate of ~64 mmol·g-1·h-1. A strong temperature-dependent catalytic performance was discovered: elevated reaction temperature (55°C) dramatically enhances activity by reducing interfacial resistances by 1-2 orders of magnitude. In contrast, lowered temperature (-1°C) favors superior CO selectivity by suppressing the competing hydrogen evolution reaction (HER) more effectively. Mechanistic studies identify the surface reduction of COOH* to CO* as the rate-determining step (RDS) with a Tafel slope of 50-56 mV/dec. This study transcends the conventional catalyst screening by providing deep mechanistic insights into reaction dynamics, offering a new design principle for efficient CO2 conversion catalysts through the manipulation of operational temperature.","PeriodicalId":92,"journal":{"name":"Nanoscale","volume":"20 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145696991","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}
Jithin Kundalam Kadavath, Bindu Krishnan, Rene F. Cienfuegos-Pelaes, David Avellaneda Avellaneda, Selene SEPULVEDA-GUZMAN, Nora Aleyda Garcia-Gomez, Sadasivan Shaji
This study reports an ultra-sensitive, surface engineered, three-dimensional nanostructured Surface-Enhanced Raman Spectroscopy (3D SERS) platform for the label-free detection of glucose and uric acid at picomolar, aromatic dye molecule up to femtomolar concentrations. This sensor integrates bimetallic AgAu nanoparticles into silver (Ag) nanostructures on a silicon (Si) substrate with precision UV laser scribing. 3D SERS sensor of high sensitivity and stability is achieved through a synergistic approach combining bimetallic nanoparticles produced by laser ablation in liquid, and laser patterning for nanostructuring of Ag layer on Si substrate immersed in this nanocolloid, yielding an architecturally configured surface with highdensity plasmonic hotspots. The homogeneous distribution, structural and morphological investigations, and chemical purity of the synthesized nanostructures are analyzed using advanced characterizations. The sensor achieves an analytical enhancement factor (AEF) of 1.36 × 10 11 for a Raman reporter molecule (R6G), with resolvable spectral features for glucose and uric acid down to 10 -12 M (1 pM), thereby emphasizing its exceptional detection limit, surpassing most of the analytical techniques reported for their detection in the literature. The sensor exhibits outstanding spectral reproducibility (RSD = 5.56% for 1 nM of uric acid), robust linearity across six orders of magnitude (R 2 = 0.98), remarkable temporal stability, maintaining signal fidelity for over 10 weeks under ambient conditions. The capability for multiplexed analyte identification is demonstrated through co-detection of glucose and uric acid at 1 pM. The facile fabrication, architectural scalability, and long-term operational stability, position this 3D SERS sensor as a formidable candidate for next-generation, portable diagnostic platforms for bioanalytical application.
{"title":"Ultra-low limit of detection for glucose and uric acid using 3D silver nanostructures decorated with bimetallic (AgAu) nanoparticles as SERS sensor","authors":"Jithin Kundalam Kadavath, Bindu Krishnan, Rene F. Cienfuegos-Pelaes, David Avellaneda Avellaneda, Selene SEPULVEDA-GUZMAN, Nora Aleyda Garcia-Gomez, Sadasivan Shaji","doi":"10.1039/d5nr03465e","DOIUrl":"https://doi.org/10.1039/d5nr03465e","url":null,"abstract":"This study reports an ultra-sensitive, surface engineered, three-dimensional nanostructured Surface-Enhanced Raman Spectroscopy (3D SERS) platform for the label-free detection of glucose and uric acid at picomolar, aromatic dye molecule up to femtomolar concentrations. This sensor integrates bimetallic AgAu nanoparticles into silver (Ag) nanostructures on a silicon (Si) substrate with precision UV laser scribing. 3D SERS sensor of high sensitivity and stability is achieved through a synergistic approach combining bimetallic nanoparticles produced by laser ablation in liquid, and laser patterning for nanostructuring of Ag layer on Si substrate immersed in this nanocolloid, yielding an architecturally configured surface with highdensity plasmonic hotspots. The homogeneous distribution, structural and morphological investigations, and chemical purity of the synthesized nanostructures are analyzed using advanced characterizations. The sensor achieves an analytical enhancement factor (AEF) of 1.36 × 10 11 for a Raman reporter molecule (R6G), with resolvable spectral features for glucose and uric acid down to 10 -12 M (1 pM), thereby emphasizing its exceptional detection limit, surpassing most of the analytical techniques reported for their detection in the literature. The sensor exhibits outstanding spectral reproducibility (RSD = 5.56% for 1 nM of uric acid), robust linearity across six orders of magnitude (R 2 = 0.98), remarkable temporal stability, maintaining signal fidelity for over 10 weeks under ambient conditions. The capability for multiplexed analyte identification is demonstrated through co-detection of glucose and uric acid at 1 pM. The facile fabrication, architectural scalability, and long-term operational stability, position this 3D SERS sensor as a formidable candidate for next-generation, portable diagnostic platforms for bioanalytical application.","PeriodicalId":92,"journal":{"name":"Nanoscale","volume":"29 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145696992","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}
Eunji Jeong, Seo Yeong Oh, Seong Uk Son, Sojeong Lee, Ryunhyung Kim, Jaewook Lim, Sunjoo Kim, Taejoon Kang, Juyeon Jung, Seung-Yong Seong, In-Young Jang, Jong Hyun Kim, Eunhee Jang, Hyoung Hwa Jeong, Eun-Kyung Lim, Seungjoo Haam
Correction for ‘Nanobody engineering for enhanced-sensitivity rapid COVID-19 tests’ by Eunji Jeong et al., Nanoscale, 2025, 17, 23329–23342, https://doi.org/10.1039/D5NR02568K.
The oxygen reduction reaction is significantly important for metal-air batteries, yet the sluggish reaction kinetics limited by slow proton-coupled electron transfer has hindered their further application. Here, dual Cr and Fe atoms are incorporated into a high-curvature carbon nano-onion (Onion-CrFeDSA) to demonstrate significantly synergistic regulation of proton generation and transfer from the dual catalytic centers. The electrochemical measurements confirmed that the dual-site configuration in Onion-CrFeDSA could enhance the ORR performance with a half-wave potential of 0.916 V and a kinetic current density of 26.45 mA cm-2. Besides, a high turnover frequency (TOF) of 7.44 s-1 together with a high mass activity of 51.42 A mgFe-1 are also achieved for the as-obtained dual atomic catalysts. A series of operando techniques, combined with density functional theory calculations, revealed that Cr atoms mainly contribute to water dissociation and proton transfer, while Fe atoms predominantly catalyze oxygen reduction and intermediate conversion. Moreover, the Onion-CrFeDSA-assembled aqueous and quasi-solid zinc-air batteries achieve impressively high maximum power densities of 314.7 mW cm-2 and 163.3 mW cm-2, representing a top-tier Fe-based ORR catalyst. This work proposes a feasible way to enhance the ORR performance by engineering adjacent catalytic centers to cooperatively mediate the proton-coupled electron transfer.
氧还原反应对金属-空气电池至关重要，但质子耦合电子转移缓慢所限制的反应动力学缓慢阻碍了其进一步应用。在这里，双Cr和Fe原子被整合到一个高曲率的碳纳米洋葱（Onion-CrFeDSA）中，以证明质子的产生和从双催化中心转移的显著协同调节。电化学测试结果表明，洋葱- crfedsa的双位点结构可以提高ORR性能，其半波电位为0.916 V，动态电流密度为26.45 mA cm-2。此外，所制备的双原子催化剂具有7.44 s-1的高周转率和51.42 a mgFe-1的高质量活性。一系列operando技术结合密度泛函理论计算表明，Cr原子主要催化水解离和质子转移，Fe原子主要催化氧还原和中间转化。此外，洋葱- crfedsa组装的水溶液和准固体锌空气电池的最大功率密度分别为314.7 mW cm-2和163.3 mW cm-2，代表了顶级的铁基ORR催化剂。本工作提出了一种可行的方法，通过工程设计相邻催化中心协同介导质子耦合电子转移来提高ORR性能。
{"title":"Synergistically promoting proton-coupled electron transfer of oxygen reduction with dual atomic sites on high-curvature carbon onions for highly efficient Zn-air batteries.","authors":"Yunxiang Lin,Qixin Wang,Ruyun Zheng,Bo Geng,Yuanyue Bao,Anhui Ke,Chao Wang,Hengjie Liu,Xue Liu,Lei Shan,Li Yang,Li Song","doi":"10.1039/d5nr03918e","DOIUrl":"https://doi.org/10.1039/d5nr03918e","url":null,"abstract":"The oxygen reduction reaction is significantly important for metal-air batteries, yet the sluggish reaction kinetics limited by slow proton-coupled electron transfer has hindered their further application. Here, dual Cr and Fe atoms are incorporated into a high-curvature carbon nano-onion (Onion-CrFeDSA) to demonstrate significantly synergistic regulation of proton generation and transfer from the dual catalytic centers. The electrochemical measurements confirmed that the dual-site configuration in Onion-CrFeDSA could enhance the ORR performance with a half-wave potential of 0.916 V and a kinetic current density of 26.45 mA cm-2. Besides, a high turnover frequency (TOF) of 7.44 s-1 together with a high mass activity of 51.42 A mgFe-1 are also achieved for the as-obtained dual atomic catalysts. A series of operando techniques, combined with density functional theory calculations, revealed that Cr atoms mainly contribute to water dissociation and proton transfer, while Fe atoms predominantly catalyze oxygen reduction and intermediate conversion. Moreover, the Onion-CrFeDSA-assembled aqueous and quasi-solid zinc-air batteries achieve impressively high maximum power densities of 314.7 mW cm-2 and 163.3 mW cm-2, representing a top-tier Fe-based ORR catalyst. This work proposes a feasible way to enhance the ORR performance by engineering adjacent catalytic centers to cooperatively mediate the proton-coupled electron transfer.","PeriodicalId":92,"journal":{"name":"Nanoscale","volume":"29 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145696627","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}
Sukanya Das, Michael Klos, Tobias Kraus, Roland Bennewitz
Inks of gold nanoparticles with stabilizing and conducting polymer shells are promising materials for printed electronics. Local measurements of their electrical properties at the single-particle scale are required to understand the relation between particle network and electrical functionality. Here we report on conductive atomic force microscopy (cAFM) on films produced from hybrid Au nanoparticles that carry a covalently bound shell of the conducting polymer poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) and are distributed in a non-conductive matrix of polyvinyl alcohol (PVA). Current maps reveal a clustering of particles into electrically well-connected local networks and allow us to quantify the contact resistance between particles or clusters of particles. We find that the contact resistance between particles inside clusters is lower than those between clusters, indicating a hierarchical layer structure. By comparing inkjet-printed thicker bulk films and drop-casted films of single- or few-layer thickness, the experimental results offer valuable insights into the relation between structure of nanoparticle networks and electrical conductance in these hybrid systems.
{"title":"Local Networks of Electrical Conductance in Hybrid Gold Nanoparticle-Polymer Films","authors":"Sukanya Das, Michael Klos, Tobias Kraus, Roland Bennewitz","doi":"10.1039/d5nr04335b","DOIUrl":"https://doi.org/10.1039/d5nr04335b","url":null,"abstract":"Inks of gold nanoparticles with stabilizing and conducting polymer shells are promising materials for printed electronics. Local measurements of their electrical properties at the single-particle scale are required to understand the relation between particle network and electrical functionality. Here we report on conductive atomic force microscopy (cAFM) on films produced from hybrid Au nanoparticles that carry a covalently bound shell of the conducting polymer poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) and are distributed in a non-conductive matrix of polyvinyl alcohol (PVA). Current maps reveal a clustering of particles into electrically well-connected local networks and allow us to quantify the contact resistance between particles or clusters of particles. We find that the contact resistance between particles inside clusters is lower than those between clusters, indicating a hierarchical layer structure. By comparing inkjet-printed thicker bulk films and drop-casted films of single- or few-layer thickness, the experimental results offer valuable insights into the relation between structure of nanoparticle networks and electrical conductance in these hybrid systems.","PeriodicalId":92,"journal":{"name":"Nanoscale","volume":"127 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145696995","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}
Enxi Shi, Hongmei Cao, Yiyuan Hua, Adila Abulimiti, Jie Zhao, Can Cui, Weiji Dai, Cuijiao Zhao, Yudong Zhang, Saifang Huang
Aqueous zinc-ion batteries (AZIBs) have emerged as strategic energy storage devices for large-scale power grids and wearable electronics due to their high safety, low cost, high theoretical specific capacity, and environmental friendliness. However, the practical application of AZIBs under extreme conditions, such as low and high temperatures, mechanical deformation, and chemical/electrochemical abuse, still suffers from significant challenges. These harsh environments can exacerbate issues, including freezing or evaporation of the aqueous electrolyte, side reactions at the electrode-electrolyte interface, zinc dendrite growth, and structural degradation of cathode materials, leading to severe performance degradation or failure of the batteries. This review summarizes recent advances in the optimization strategies to enhance the environmental adaptability of AZIBs. The electrode material modifications, electrolyte designs, and interface regulations are mainly introduced. Finally, current challenges and future research directions are outlined.
{"title":"Advances and Challenges in Aqueous Zinc-Ion Batteries for Extreme Environmental Adaptability","authors":"Enxi Shi, Hongmei Cao, Yiyuan Hua, Adila Abulimiti, Jie Zhao, Can Cui, Weiji Dai, Cuijiao Zhao, Yudong Zhang, Saifang Huang","doi":"10.1039/d5nr04573h","DOIUrl":"https://doi.org/10.1039/d5nr04573h","url":null,"abstract":"Aqueous zinc-ion batteries (AZIBs) have emerged as strategic energy storage devices for large-scale power grids and wearable electronics due to their high safety, low cost, high theoretical specific capacity, and environmental friendliness. However, the practical application of AZIBs under extreme conditions, such as low and high temperatures, mechanical deformation, and chemical/electrochemical abuse, still suffers from significant challenges. These harsh environments can exacerbate issues, including freezing or evaporation of the aqueous electrolyte, side reactions at the electrode-electrolyte interface, zinc dendrite growth, and structural degradation of cathode materials, leading to severe performance degradation or failure of the batteries. This review summarizes recent advances in the optimization strategies to enhance the environmental adaptability of AZIBs. The electrode material modifications, electrolyte designs, and interface regulations are mainly introduced. Finally, current challenges and future research directions are outlined.","PeriodicalId":92,"journal":{"name":"Nanoscale","volume":"1 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145704829","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}
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