Langmuir最新文献

{"title":"Protamine Drives Liquid and Solid Condensation of DNA and Glycosaminoglycans","authors":"Florian J. F. van der Harten,&nbsp;, ,&nbsp;Vahid Sheikhhassani,&nbsp;, and ,&nbsp;Alireza Mashaghi*,&nbsp;","doi":"10.1021/acs.langmuir.5c01954","DOIUrl":"10.1021/acs.langmuir.5c01954","url":null,"abstract":"<p >Phase-separated biomolecular condensates play a crucial role in cellular organization. In the nucleus, phase separation regulates the assembly and function of nuclear proteins and the genome. Here, we demonstrate that protamine, an arginine-rich nuclear protein responsible for promoting double-stranded DNA (dsDNA) compaction in sperm, undergoes phase separation with single-stranded DNA (ssDNA) and induces dsDNA aggregation. The protamine-ssDNA condensates behave as viscoelastic liquid droplets and can be modulated by varying salt concentrations or by treatment with heparin, a glycosaminoglycan polyanion, which we show displaces ssDNA. Moreover, protamine-dsDNA aggregates dissolve upon exposure to heparin, leading to the formation of condensates with a distinct morphology. This observation provides a compelling example of an aggregate-to-condensate transition in polyelectrolyte systems. Notably, direct combination of protamine with heparin results in the formation of similar phase-separated liquid-like droplets, suggesting that heparin can compete with both ssDNA and dsDNA for protamine binding. We performed a comparative analysis using other positively charged proteins and negatively charged glycosaminoglycans to gain insights into the condensation behavior of protamine and heparin. Finally, we leveraged these findings to conduct a proof-of-concept analysis aimed at developing programmable biomolecular condensates for protamine-assisted nucleic acid delivery. Given that polyanionic glycosaminoglycans have been used for sperm capacitation and that DNA fragmentation is a biomarker for infertility in males, our findings offer new insights into the mechanisms of protamine-driven DNA compaction in sperm and its potential implications for reproductive medicine.</p>","PeriodicalId":50,"journal":{"name":"Langmuir","volume":"41 38","pages":"25893–25902"},"PeriodicalIF":3.9,"publicationDate":"2025-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/pdf/10.1021/acs.langmuir.5c01954","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145103324","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Insights into Growth of a Photoactive Layer Based on Perylene Diimide Bearing Alkoxysilane Groups","authors":"Karolina Socha,&nbsp;, ,&nbsp;Maciej Krzywiecki,&nbsp;, ,&nbsp;Patryk Mroczko,&nbsp;, ,&nbsp;Dawid Nastula,&nbsp;, ,&nbsp;Karol Erfurt,&nbsp;, ,&nbsp;Radosław Motyka*,&nbsp;, and ,&nbsp;Agata Blacha-Grzechnik*,&nbsp;","doi":"10.1021/acs.langmuir.5c03319","DOIUrl":"10.1021/acs.langmuir.5c03319","url":null,"abstract":"<p >The chemical grafting of organic photosensitizers onto solid surfaces has gained increasing attention lately as an effective strategy for the formation of stable, functional layers, with promising applications in areas such as antimicrobial coatings and optoelectronic devices. In this work, a perylene diimide (PDI) derivative bearing alkoxysilane groups, APTES-PDI-APTES, was synthesized and chemically grafted onto a glass surface. The presence of two alkoxysilanes enabled competing processes to occur, i.e., condensation reactions, which led to the formation of complex multilayer structures, and covalent bonding to the glass surface. The influence of deposition process parameters, such as solvent polarity and immersion time, on the chemical structure and the morphology of the resulting layer was studied using X-ray photoelectron spectroscopy, Raman spectroscopy, and atomic force microscopy. The singlet oxygen photogeneration was tested using an indirect detection method, proving that after immobilization, APTES-PDI-APTES retains its photosensitizing properties. These findings highlight the influence of the process parameters on the development of the PDI-containing multilayer and its potential application as a heterogeneous source of singlet oxygen.</p>","PeriodicalId":50,"journal":{"name":"Langmuir","volume":"41 38","pages":"26290–26299"},"PeriodicalIF":3.9,"publicationDate":"2025-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/pdf/10.1021/acs.langmuir.5c03319","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145103353","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Overlooked Roles of Long-Chain Alkyl Quaternary Ammonium Cations in the Mesopore Engineering of ZSM-5 Zeolite","authors":"Jiale Zhao,&nbsp;, ,&nbsp;Keyu Yang,&nbsp;, ,&nbsp;Ning Wei,&nbsp;, ,&nbsp;Yunxuan Ji,&nbsp;, ,&nbsp;Bingru Li,&nbsp;, ,&nbsp;Jiaxu Liu,&nbsp;, ,&nbsp;Guiqiu Wang*,&nbsp;, ,&nbsp;Peidong Li*,&nbsp;, and ,&nbsp;Shengjun Huang,&nbsp;","doi":"10.1021/acs.langmuir.5c02613","DOIUrl":"10.1021/acs.langmuir.5c02613","url":null,"abstract":"<p >The introduction of a specific concentration of long-chain alkyl quaternary ammonium cations inhibits the construction of mesoporosities inside MFI zeolites through alkaline treatment. The spontaneously formed micelles bear an electrical double-layer structure, which imposes repulsion on the caustic hydroxide ions (OH^–) and therefore restrains the dissolution of the zeolite in the alkaline media. The aforementioned inhibitive effect of long-chain alkyl quaternary ammonium cations can be disabled by the addition of an inorganic salt, such as NaBr, which induces a transformation in micelle morphology and the micellar electrical double-layer structure. In the case of alkyl quaternary ammonium cations with short alkyl chains (e.g., trimethyloctylammonium: C₈TA⁺), such an inhibitive effect cannot be eliminated by the addition of an inorganic salt like NaBr. These findings update the understanding of the roles of alkyl quaternary ammonium cations and their micelle forms in tailoring the porosities inside zeolites.</p>","PeriodicalId":50,"journal":{"name":"Langmuir","volume":"41 38","pages":"25970–25977"},"PeriodicalIF":3.9,"publicationDate":"2025-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145089013","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of Short-Term Thermal Annealing on the Nanostructure of Nafion Thin Films on Platinum Substrates","authors":"Shigeki Uzuki*,&nbsp;, ,&nbsp;Masako Yamada,&nbsp;, ,&nbsp;Reiji Kumai,&nbsp;, ,&nbsp;Koji Michishio,&nbsp;, ,&nbsp;Kenji Yamaoka,&nbsp;, ,&nbsp;Yoshihisa Fujii,&nbsp;, ,&nbsp;Ryuji Maruyama,&nbsp;, and ,&nbsp;Norifumi L. Yamada,&nbsp;","doi":"10.1021/acs.langmuir.5c02893","DOIUrl":"10.1021/acs.langmuir.5c02893","url":null,"abstract":"<p >At the cathode of a polymer electrolyte fuel cell (PEFC), protons transported from the anode react with the oxygen gas at the interface of a platinum (Pt) catalyst and an ionomer thin film, where protons pass through a water network in the thin film and the oxygen permeates through it. This implies that the conductivity and permeability of the film, which are influenced by the nanostructure of the film, can be the rate-limiting factors for the reaction. In this study, the effect of short-term thermal annealing, which imitates the industrial decal process and results in high gas permeability, on the nanostructure of a Nafion thin film coated on a Pt layer on a substrate was examined using a combination of grazing-incidence small-angle X-ray scattering (GI-SAXS), neutron reflectometry (NR), and positron annihilation spectroscopy (PAS). The structural evolution during thermal annealing was observed using GI-SAXS and NR analyses. An initial isotropic water network structure was transformed into a transient homogeneous structure after 20 min of thermal annealing, and a stable multilayered interfacial structure was induced at the interface with the Pt substrate in the out-of-plane direction after 4 h of long-term annealing. A significant increase in the free volume size of the Nafion thin film was observed using PAS analysis after 20 min of thermal annealing, which could increase the oxygen permeability a few times and one order of magnitude more than the initial state and equilibrium state after annealing, respectively. These results indicate that the transient disordered structure of the Nafion thin film may be the origin of the oxygen permeability enhancement by the decal process, in which the structure is quenched during the transformation from the initial metastable state to the final stable state during short-term thermal annealing.</p>","PeriodicalId":50,"journal":{"name":"Langmuir","volume":"41 38","pages":"26140–26148"},"PeriodicalIF":3.9,"publicationDate":"2025-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145089008","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Bioinspired Mossene Membrane Integrating Sulfhydryl-Modified MOFs for Efficient Solar-Driven Seawater Desalination","authors":"Zhixi Wu,&nbsp;, ,&nbsp;Zhitao He,&nbsp;, ,&nbsp;Wanxiu Zhao,&nbsp;, ,&nbsp;Md Hobaib,&nbsp;, ,&nbsp;Yi Zhou,&nbsp;, ,&nbsp;Zhao Ding,&nbsp;, ,&nbsp;Hongxiang Chen,&nbsp;, and ,&nbsp;Yang Zhou*,&nbsp;","doi":"10.1021/acs.langmuir.5c03744","DOIUrl":"10.1021/acs.langmuir.5c03744","url":null,"abstract":"<p >A fundamental challenge in the design of solar evaporators is balancing the conflicting requirements of salt rejection and high evaporation efficiency. Consequently, bioinspired membrane design has emerged as a promising strategy for enhancing solar-driven interfacial water evaporation and desalination. Here, we report a bioinspired asymmetric photothermal membrane that is denoted as Mossene. Its design is inspired by the ecological water-regulation strategies of niche bryophytes. This Mossene membrane integrates dual-layer functionality: a hydrophilic substrate for water transport and retention and a hydrophobic top layer for light absorption and floatation. The lower hydrophilic layer is fabricated by electrospinning polyamide-6 blended with a sulfhydrylated UiO-66 metal–organic framework. This structure enables rapid water uptake, storage, and sustained molecular transport, emulating the function of water-storage cells in bryophyte leaves. The upper hydrophobic layer, composed of multiwalled carbon nanotubes and polyvinylidene fluoride, replicates the surface hydrophobicity and chlorophyll-mimetic light-harvesting characteristics of moss leaves. This design ensures efficient solar absorption and thermal confinement. Under 1 kW m^–2 irradiation, the dry surface of Mossene heats from 16 to 109.9 °C within 6 min. When floated on 3.5 wt % NaCl solution, the membrane reaches 78.5 °C in 5 min, demonstrating excellent photothermal conversion. The optimized Mossene membrane (MCM-6.5–0.75) achieves an outstanding water evaporation rate of 1.55 kg m^–2 h^–1 and an energy conversion efficiency of 97.5%. This study introduces Mossene as a biomimetic photothermal membrane that integrates hierarchical structure, selective wettability, and efficient energy utilization and underscores the potential of next-generation solar evaporators for practical implementation in sustainable water purification.</p>","PeriodicalId":50,"journal":{"name":"Langmuir","volume":"41 38","pages":"26464–26481"},"PeriodicalIF":3.9,"publicationDate":"2025-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145089009","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Simple Preparation of AP@CuDHT Core–Shell Structure: A “One Stone, Three Birds” Method for Comprehensively Improving the Energy, Thermal Properties, and Hygroscopicity of AP","authors":"Shilong Li,&nbsp;, ,&nbsp;Xiaodong Gou,&nbsp;, ,&nbsp;Wei Liu*,&nbsp;, ,&nbsp;Zhongliang Ma,&nbsp;, ,&nbsp;Xiaojun Wang,&nbsp;, and ,&nbsp;Xiaojuan Yang,&nbsp;","doi":"10.1021/acs.langmuir.5c02820","DOIUrl":"10.1021/acs.langmuir.5c02820","url":null,"abstract":"<p >Comprehensive improvement in the thermal properties, energy characteristics, and hygroscopicity of ammonium perchlorate (AP) carries substantial significance to its utilization in solid propellants. In the present study, a novel coating agent, CuDHT, was synthesized via the self-assembly of 3,6-dihydrazino-1,2,4,5-tetrazine (DHT) and transition metal ions (Cu²⁺), which can comprehensively enhance the performance of AP. The morphology, composition, and thermal properties of samples prepared in this work were examined via scanning electron microscopy, Fourier transform infrared spectroscopy, powder X-ray diffraction, differential scanning calorimetry, and thermogravimetric analysis techniques. Meanwhile, the burning rate and combustion temperature of AP@CuDHT-based solid propellants were tested via infrared thermography. The findings show that AP particles have their surfaces coated with a homogeneous and compact CuDHT coating layer. Moreover, the CuDHT coating layer is capable of markedly catalyzing AP’s thermal decomposition and reducing its hygroscopicity. As the CuDHT coating content increases, the peak temperature of AP@CuDHT’s high-temperature decomposition and moisture absorption rate gradually decrease. When the CuDHT content reaches 10 wt %, the HTD peak temperature of AP@CuDHT moves forward by 69.5 °C relative to pure AP, and the moisture absorption rate is cut by 0.326 wt %. Compared with pure AP, AP@CuDHT (10%)’s impact and friction sensitivities are higher by 4% and 8%. Additionally, CuDHT can remarkably enhance the combustion performance of solid propellants. With an increase in CuDHT content, the burning rate of AP@CuDHT-based propellants and their combustion temperature gradually increase. At 10 wt % CuDHT, the burning rate and combustion temperature are enhanced by 6.1 mm·s^–1 and 572.6 °C, respectively, compared to those of pure AP-based propellants. In summary, this study provides references for comprehensively improving the hygroscopicity, energy, and thermal properties of AP and, meanwhile, demonstrates a significant application outlook for promoting the combustion performance in solid propellants.</p>","PeriodicalId":50,"journal":{"name":"Langmuir","volume":"41 38","pages":"26076–26087"},"PeriodicalIF":3.9,"publicationDate":"2025-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145089011","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Electrocatalytic Nitrate Reduction to Ammonia Using Metal-Free Nitrogen-Doped Carbon Catalysts Derived from Setaria viridis","authors":"Yuting Qu,&nbsp;, ,&nbsp;Boran Yang,&nbsp;, ,&nbsp;Hongli Wang*,&nbsp;, ,&nbsp;Xingcheng Ma,&nbsp;, ,&nbsp;Lixin Chen,&nbsp;, ,&nbsp;Ying Gao,&nbsp;, and ,&nbsp;Shicheng Sun*,&nbsp;","doi":"10.1021/acs.langmuir.5c03389","DOIUrl":"10.1021/acs.langmuir.5c03389","url":null,"abstract":"<p >Electrocatalytic reduction of nitrate to ammonia is one potential strategy to remove nitrate and produce ammonia under ambient conditions. The use of carbonaceous materials as metal-free electrocatalysts is crucial for achieving high activity and precise product selectivity. Here, we propose a facile one-step calcination strategy to produce nitrogen-doped carbon (N–C-900–3) electrocatalysts derived from <i>Setaria viridis</i> (SV) for highly efficient nitrate-to-ammonia reduction (NO₃RR). Benefiting from the high concentration of defects and the high content of graphitic-N moiety, which play a crucial role in promoting the dissociation of water and the N–H bond formation, the resultant N–C-900–3 displays outstanding electrocatalytic performance with a maximum NH₃ yield rate of 6.23 mg h^–1 cm^–2 and a Faradaic efficiency (FE) of ca. 97.4%.</p>","PeriodicalId":50,"journal":{"name":"Langmuir","volume":"41 38","pages":"26322–26329"},"PeriodicalIF":3.9,"publicationDate":"2025-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145083558","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Construction of a Ce–F Bond in CeO2–xFx Nanoabrasives and Its Dispersion-Polishing Coupling Enhancement Mechanism","authors":"Ning Xu*,&nbsp;, ,&nbsp;Ziheng Gao,&nbsp;, ,&nbsp;Yu Huo,&nbsp;, ,&nbsp;Kailong Gao,&nbsp;, ,&nbsp;Yansong Wang,&nbsp;, ,&nbsp;Guosheng Zhang,&nbsp;, ,&nbsp;Yu Lin,&nbsp;, and ,&nbsp;Zhuo Wang,&nbsp;","doi":"10.1021/acs.langmuir.5c03386","DOIUrl":"10.1021/acs.langmuir.5c03386","url":null,"abstract":"<p >As a commonly used abrasive in chemical mechanical polishing (CMP), CeO₂ enables high-precision material removal during SiO₂ polishing due to its unique chemical tooth effect. Its performance is heavily influenced by the dispersion stability of the polishing slurry and the concentration of Ce³⁺ in the CeO₂ particles. Traditional methods that rely on dispersant additives have inherent limitations, including sensitivity to environmental factors such as pH and temperature, which can lead to dispersant failure and particle reagglomeration, thereby compromising polishing uniformity. Additionally, excessive dispersant may coat the abrasive surfaces, reducing direct contact with the workpiece and, consequently, diminishing the material removal rate (MRR) and chemical activity. To overcome these challenges, this study proposes a fluorine doping strategy that enhances both the Ce³⁺ concentration and dispersion stability by precisely controlling the F^– doping levels in CeO₂ abrasives. Experimental results show that fluorine doping significantly improves the colloidal stability, as evidenced by a reduced sedimentation rate, an increased optical absorbance, a higher zeta potential (63.1 mV), and a more uniform particle size distribution with suppressed agglomeration. These changes enhance the effective contact area between the abrasives and SiO₂ substrates. Notably, at an optimal F^– doping concentration of 0.05, the modified abrasives exhibited a 12.28% increase in surface oxygen vacancy density and Ce³⁺ concentration compared to the undoped abrasives, alongside a 31% improvement in SiO₂ MRR. Furthermore, the polishing mechanism of the doped abrasives on SiO₂ substrates was systematically investigated, revealing an enhanced chemical–mechanical synergy through controlled oxygen vacancy generation and optimized surface charge characteristics.</p>","PeriodicalId":50,"journal":{"name":"Langmuir","volume":"41 38","pages":"26330–26341"},"PeriodicalIF":3.9,"publicationDate":"2025-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145083556","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Biomimetic Ventilation Cap Structure Enables Passive Water Collection and Stable Power Generation","authors":"Junhao Liu,&nbsp;, ,&nbsp;Congji Zhang,&nbsp;, ,&nbsp;Tianze Zhang,&nbsp;, ,&nbsp;Guopeng Chen,&nbsp;, ,&nbsp;Yanshu Zhong,&nbsp;, ,&nbsp;Fengxiang Chen*,&nbsp;, ,&nbsp;Shangzhen Xie*,&nbsp;, and ,&nbsp;Zhiguang Guo*,&nbsp;","doi":"10.1021/acs.langmuir.5c03431","DOIUrl":"10.1021/acs.langmuir.5c03431","url":null,"abstract":"<p >This study aimed to address the global challenges of freshwater scarcity and energy shortage by developing a bioinspired and multifunctional fog collector. Drawing inspiration from the architecture of unpowered ventilation caps and the surface structure of desert beetles, the researchers engineered a three-dimensional device featuring a wettability gradient. This advanced structure featured a 360° array of blades composed of superhydrophobic surfaces and superhydrophilic regions, enabling omnidirectional fog collection while simultaneously utilizing rotational motion to generate electricity. Experimental evaluations demonstrated that the device achieved a fog collection efficiency of 7620 mg cm^–2 h^–1 under conditions of 2.6 m/s wind speed and 100% relative humidity. Additionally, the system generated a stable electrical output of 0.6 V and 5 mA at a wind speed of 7 mph. The fabrication process involved laser scanning and chemical modification to establish superhydrophobic and superhydrophilic regions, thereby creating a wettability gradient. This configuration, in conjunction with centrifugal forces, facilitated the effective capture and directed transport of water droplets. The device also exhibited robust durability across repeated experimental trials, underscoring its suitability for prolonged use. This work presented a novel design paradigm for fog collection systems and offered promising applications in mitigating both water and energy scarcity.</p>","PeriodicalId":50,"journal":{"name":"Langmuir","volume":"41 38","pages":"26411–26419"},"PeriodicalIF":3.9,"publicationDate":"2025-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145089587","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Engineering Coordination-Modulated Binary Nickel Cobalt MOF Nanoarchitectures for Enhanced Supercapacitor Performance.","authors":"Jaya Shree Korapatti Selamayya,Ajay Rakkesh Rajendran,Balakumar Subramanian","doi":"10.1021/acs.langmuir.5c03749","DOIUrl":"https://doi.org/10.1021/acs.langmuir.5c03749","url":null,"abstract":"A strategy focused on modulating the coordination environment facilitated the development of an optimized NiCo metal-organic framework (MOF). This advancement has directly contributed to a higher capacitance and improved efficiency for supercapacitor applications. The present study investigates how coordination modulation (CM) affects deprotonation of the organic linker and nucleation, as well as their subsequent influence on the electrochemical performance of bimetallic NiCo MOFs. This CM strategy resulted in the formation of NiCo MOFs with different pH levels at various concentrations, resulting in distinct morphologies, further highlighting the critical role that pH plays in determining the structural, textural, surface charge, and electrochemical properties of the materials. These outcomes emphasize the significance of CM in the pH-induced surface charge effect for supercapacitors. Notably, the NiCo MOFs synthesized at pH 6.0 exhibited an extraordinary specific capacitance of 576.4 F/g at a current density of 1 A/g, along with energy and power densities of 24.2 Wh/Kg and 275 W/kg, respectively. Furthermore, the asymmetric device composed of pH 6.0 NiCo MOF and activated carbon achieved a specific capacitance of 61.03 F/g with an energy density of 20.4 Wh/kg, a Coulombic efficiency of 92.75%, and capacity retention of 87.50% after 2500 cycles. Armed with the knowledge of the CM strategy, this article successfully elucidated the effect of CM and pH on bimetallic NiCo MOFs, pinpointing that NiCo MOF at pH 6.0 is a potential candidate by all beneficial means.","PeriodicalId":50,"journal":{"name":"Langmuir","volume":"55 1","pages":""},"PeriodicalIF":3.9,"publicationDate":"2025-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145083557","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}