ACS Applied Nano Materials最新文献

{"title":"Next-Generation Self-Powered Photodetectors using 2D Bismuth Oxide Selenide Crystals","authors":"Pradip Kumar Roy*,&nbsp;Kseniia Mosina,&nbsp;Sofia Hengtakaeh,&nbsp;Kalyan Jyoti Sarkar,&nbsp;Vlastimil Mazánek,&nbsp;Jan Luxa and Zdenek Sofer*,&nbsp;","doi":"10.1021/acsanm.4c0359410.1021/acsanm.4c03594","DOIUrl":"https://doi.org/10.1021/acsanm.4c03594https://doi.org/10.1021/acsanm.4c03594","url":null,"abstract":"<p >The concept of self-powered photodetectors has attracted significant attention due to their versatile applications in areas such as intelligent systems and hazardous substance detection. Among these, <i>p–n</i> junction and Schottky junction photodetectors are the most widely studied types; however, their fabrication processes are often complex and costly. To overcome these challenges, we focused on the emerging self-powered, ultrasensitive photodetector platform based on photoelectrochemical (PEC) principles. This platform leverages the unique properties of the emerging material bismuth oxide selenide (Bi₂O₂Se), which features a wide bandgap (∼2 eV) and a high absorption coefficient. We utilized chemical exfoliation to obtain thin layers of Bi₂O₂Se, enabling highly efficient photodetection. The device characterization demonstrated impressive performance metrics, including a responsivity of 97.1 μA W^–1 and a specific detectivity of 2 × 10⁸ cm Hz ^1/2 W^–1. The PEC photodetector also exhibits broad-spectrum sensitivity, from blue to infrared wavelengths, and features an ultrafast response time of ∼82 ms and a recovery time of ∼86 ms, highlighting its practical potential. Moreover, these self-powered photodetectors show excellent stability in electrochemical environments, positioning them promising candidates for integration into future high-efficiency devices.</p>","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":null,"pages":null},"PeriodicalIF":5.3,"publicationDate":"2024-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acsanm.4c03594","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142608983","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"MXene Quantum Dot-Modified Flower-Like FeOOH for Dual-Mode Nitrite Sensing","authors":"Xiaoyu Zhan,&nbsp;Zhiyun Ding,&nbsp;Shiyao Shang,&nbsp;Ke Chu and Yali Guo*,&nbsp;","doi":"10.1021/acsanm.4c0480010.1021/acsanm.4c04800","DOIUrl":"https://doi.org/10.1021/acsanm.4c04800https://doi.org/10.1021/acsanm.4c04800","url":null,"abstract":"<p >Nowadays, the rational design of high-performance simulated nanozymes applied to environmental detection has become a current research hotspot. Herein, we employ a urea/ethanol solution synergistic-mediated approach to prepare MQDs@FeOOH nanozymes with significant peroxidase activity. The steady-state fluorescence analysis and density-functional theory calculations (DFT) investigated that the MQDs@FeOOH nanozymes possess remarkable catalytic activity. This is attributed to the active sites of the Fe-Ti dimer, which effectively adsorb H₂O₂ and activate its decomposition into reactive •OH. We have developed a dual-mode assay combining colorimetric and electrochemical methods for the determination of nitrite in the environment. The detection limits are 1.58 and 2.99 μM, achieving a facile determination in the range of 50–300 μM. It also demonstrates the advantages of high sensitivity, anti-interference, and reliability. This work provides an idea for the preparation of nanomaterials with high-performance peroxidase activity and demonstrates their wide application in environmental monitoring.</p>","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":null,"pages":null},"PeriodicalIF":5.3,"publicationDate":"2024-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142608971","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"High-Density Single Nickel Sites via an Encapsulation-Substitution Strategy for Nonenzymatic Glucose Sensing","authors":"Xiao Bai,&nbsp;Hang Yin and Ziyin Yang*,&nbsp;","doi":"10.1021/acsanm.4c0446910.1021/acsanm.4c04469","DOIUrl":"https://doi.org/10.1021/acsanm.4c04469https://doi.org/10.1021/acsanm.4c04469","url":null,"abstract":"<p >The content of metal single atoms is an important factor for restricting the electrocatalytic activity. In this work, the substitution-encapsulation strategy was reported to obtain high-density nickel single atoms (Ni SAs). This strategy was not only based on ion exchange between Zn nodes and adsorbed Ni²⁺ ions but also utilized porous ZIF-8 as a host to trap metal precursor guests in situ in their cages. The synergistic effect of ion exchange and precursor encapsulation significantly increased the content of Ni SAs. The structures of the Ni SAs were studied via transmission electron microscopy (TEM), high-angle annular dark-field scanning TEM (HAADF-STEM), X-ray diffractometry (XRD), X-ray photoelectron spectroscopy (XPS), and atomic absorption spectroscopy (AAS). Electrochemical studies revealed that the prepared high-density Ni SA catalyst is beneficial for increasing the electrocatalytic activity toward glucose. The sensitivity and the detection limit were 653.9 μA·mM^–1·cm^–2 and 0.51 μM, respectively. Furthermore, a sensor based on high-density Ni SAs can achieve highly sensitive determination of glucose content in energy drinks and serum samples. This work provides an idea for designing highly active electrocatalysts to improve glucose electrochemical sensing.</p>","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":null,"pages":null},"PeriodicalIF":5.3,"publicationDate":"2024-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142608827","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Bifunctional Oxygen Reduction/Evolution Reaction Activity of Transition Metal-Doped T-C3N2 Monolayer: A Density Functional Theory Study Assisted by Machine Learning","authors":"Jing Zhang,&nbsp;Lin Ju,&nbsp;Zhenjie Tang,&nbsp;Shu Zhang,&nbsp;Genqiang Zhang and Wentao Wang*,&nbsp;","doi":"10.1021/acsanm.4c0446710.1021/acsanm.4c04467","DOIUrl":"https://doi.org/10.1021/acsanm.4c04467https://doi.org/10.1021/acsanm.4c04467","url":null,"abstract":"<p >Designing efficient and cost-effective bifunctional electrocatalysts for the bifunctional oxygen reduction reaction (ORR)/oxygen evolution reaction (OER) is crucial for sustainable and renewable energy technologies. In this study, we systematically investigate the potential of single transition metal (TM)-doped T-C₃N₂ as bifunctional ORR/OER electrocatalysts using density functional theory and machine learning. The results reveal that TM atoms can be stably incorporated into the N vacancy (TM_N) and the central hexagonal hole (TM_i) of T-C₃N₂, creating various coordination environments for the TM atoms, which can influence the ORR/OER electrocatalytic performance. The TM atom embedded in the central hexagonal hole (Cu_i) is a robust bifunctional ORR/OER electrocatalyst due to its low overpotentials (0.53 V for ORR and 0.52 V for the OER) and superior thermodynamic stability. The ORR/OER catalytic performance of Cu_i maintains well under the biaxial strain (−1% to +6%), as the ORR and OER overpotentials of Cu_i change slightly with the biaxial strain. Nevertheless, the ORR and OER overpotentials increase sharply once the biaxial compressive strain exceeds −1%. Hence, substrates with lattice constants equal to or larger than T-C₃N₂ are required to obtain good bifunctional ORR/OER activity in experimental equipment. Lastly, we employ the machine learning method with a gradient-boosted regression model to determine the origin of ORR and OER activity. The results indicate that the charge transfer of TM atoms (<i>Q</i>_e) is the dominant descriptor for ORR activity, while the d-electron counts (<i>N</i>_e) and the d-band center (ε_d) are critical descriptors for OER. Our research highlights the efficiency of TM atom-doped T-C₃N₂ as bifunctional electrocatalysts and offers valuable insights for developing electrocatalysts for future clean energy conversion and storage applications.</p>","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":null,"pages":null},"PeriodicalIF":5.3,"publicationDate":"2024-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142608826","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Electrochemistry of Nickelocene-Ferrocene Organometallic Complexes for Electrodeposition of Nickel–Iron–Based Nanostructured Film under Ambient Conditions for Oxygen Evolution Reaction","authors":"Kamlesh,&nbsp;Parul Aggarwal,&nbsp;Manish Mudgal,&nbsp;Avanish Kumar Srivastava,&nbsp;Pankaj Raizada,&nbsp;Pardeep Singh,&nbsp;Amit Paul and Archana Singh*,&nbsp;","doi":"10.1021/acsanm.4c0408410.1021/acsanm.4c04084","DOIUrl":"https://doi.org/10.1021/acsanm.4c04084https://doi.org/10.1021/acsanm.4c04084","url":null,"abstract":"<p >This study explores the interesting redox chemistry of organometallic complexes nickelocene (Nc) and ferrocene (Fc) as well as their instability as metal inorganic complexs in electrolytes on the application of bias to derive bimetallic NiFe-based nanostructured films at room temperature conditions in the presence of atmospheric oxygen. The cyclic voltammogram of the two complexes under optimized conditions revealed that the redox peaks for Fc lie between the two redox peaks of Nc, which gave us the freedom of individual potential windows for the deposition of Ni and Fe in one step. The transformation of the metal inorganic complex to the respective nanostructured oxides was investigated using in situ UV–visible spectroscopy method, and the electrodeposited product was characterized using XRD, TEM, Raman, and XPS techniques. Furthermore, the bimetallic films were tested for their catalytic activity toward oxygen evolution reaction (OER) and urea oxidation reaction (UOR). The optimized nanoscale thicknesses of Ni and NiFe films deposited in 15 cyclic voltammetry (CV) cycles showed the best performance toward both urea and water oxidation, respectively. The NiFe-15 showed only 258 mV overpotential to achieve a current density of 10 mAcm^–2 and an impressive TOF of 1.02 s^–1 at 300 mV overpotential. Electrocatalytic studies reveal that the presence of iron increases the OER efficiency and adversely affects UOR. In-situ ultraviolet–visible (UV–vis) spectroscopy combined with in situ Raman spectroscopy revealed that the active site for the OER is higher valence oxo species of NiOOH while for UOR, NiOOH was found to be an active species. Our research reports an improved, user-friendly approach for electrode fabrication of an NiFe-based catalyst but also opens a different pathway toward the application of organometallic complexes for the design of catalysts for the oxygen evolution reaction.</p>","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":null,"pages":null},"PeriodicalIF":5.3,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142609216","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Patterned Au@Ag Nanoparticles for Surface-Enhanced Raman Scattering","authors":"Zhenkai Huang,&nbsp;Yutong Chen,&nbsp;Liguo Xu,&nbsp;Jianping Peng* and Peijiang Liu*,&nbsp;","doi":"10.1021/acsanm.4c0506310.1021/acsanm.4c05063","DOIUrl":"https://doi.org/10.1021/acsanm.4c05063https://doi.org/10.1021/acsanm.4c05063","url":null,"abstract":"<p >Herein, a surface-enhanced Raman scattering (SERS) substrate with good sensitivity and reproducibility is fabricated by using a “one-step” process. Patterned Au nanostructures were generated employing copolymer brushes as templates, subsequently undergoing the reduction of AgNO₃. Impressively, the entire experimental procedure eschews intricate synthesis steps or the necessity for stabilizer additives. The resultant Ag shell layer evenly encapsulates the Au core, yielding densely packed Ag-coated Au (Au@Ag) nanoparticles. These patterned Au@Ag nanoparticle assemblies exhibited remarkable Raman performance, achieving a minimum concentration of detection of 100 pM and an average enhancement factor of 8.8 × 10⁹ when using 4-mercaptobenzoic acid served as the probe molecule. Experimental outcomes and analyses pertaining to thiram, methylene blue, and rhodamine 6G (R6G) confirm the substrate’s pronounced Raman effect and its broad range of potential applications.</p>","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":null,"pages":null},"PeriodicalIF":5.3,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142609215","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Nanoporous Membranes from Bacterial Cellulose Derivatives for Water Treatment","authors":"Waramporn Boonyaporn,&nbsp;Muenduen Phisalaphong,&nbsp;Pisut Painmanakul,&nbsp;Panida Thanyasrisung,&nbsp;Pattarasiri Fagkaew and Voravee P. Hoven*,&nbsp;","doi":"10.1021/acsanm.4c0415210.1021/acsanm.4c04152","DOIUrl":"https://doi.org/10.1021/acsanm.4c04152https://doi.org/10.1021/acsanm.4c04152","url":null,"abstract":"<p >Ultrafiltration (UF) membranes often suffer from fouling by microorganisms or biomolecules, causing reduced permeability, shorter life spans, and enhanced operating costs. This research aims to develop naturally derived and antifouling UF membranes for wastewater filtration using bacterial nanocellulose (BNC or BC) and its chemically modified derivatives, namely, oxidized BC (OBC), quaternary ammonium-containing BC (QABC), mixed zwitterionic BC (MZBC) and zwitterionic BC (ZBC) with various charge characteristics. A thin layer of the derivatized BC nanofibers with varied area density (90–1080 mg/m²) was deposited on commercial poly(vinylidene fluoride) microfiltration (PVDF-MF) membranes by vacuum filtration followed by oven drying, and chemical cross-linking with glutaraldehyde. The chemical functionality, zeta potential, surface morphology, and surface wettability of the fabricated membranes were characterized. The asymmetric membrane fabricated from the OBC had an area density of 1080 mg/m² (OBC1080) and exhibited filtration characteristics in terms of water permeability (0.70 ± 0.27 Lm^–2 h^–1 kPa^–1), bovine serum albumin (BSA) permeability (0.50 ± 0.11 Lm^–2 h^–1 kPa^–1), flux reduction (25 ± 13%), BSA rejection (98 ± 2%), and flux recovery (68 ± 16%) upon 3-cycled filtration equivalent to those of a commercial poly(ether sulfone) (PES) UF membrane. Its superior antiadhesion of both Gram-negative (<i>Escherichia coli</i>, <i>E. coli</i>) and Gram-positive (<i>Staphylococcus aureus</i>, <i>S. aureus</i>), bacteria to the PES-UF membrane was also demonstrated. It is strongly believed that the BC derivatives can potentially be further developed into naturally derived and antifouling materials for the fabrication of effective antifouling UF membranes for wastewater filtration in the future.</p>","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":null,"pages":null},"PeriodicalIF":5.3,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acsanm.4c04152","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142609217","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Selective Tl(I) Removal by Prussian Blue–Zero Valent Iron Nanoparticles","authors":"Qingrui Li,&nbsp;Chenyong Chen,&nbsp;Xiaoqin Li*,&nbsp;Yajing Huang,&nbsp;Weizhen Liu,&nbsp;Zhang Lin and Liyuan Chai,&nbsp;","doi":"10.1021/acsanm.4c0371610.1021/acsanm.4c03716","DOIUrl":"https://doi.org/10.1021/acsanm.4c03716https://doi.org/10.1021/acsanm.4c03716","url":null,"abstract":"<p >Thallium (Tl) is a trace metal with high toxicity and exists in the aquatic environment as Tl(III) and Tl(I). Tl(I) is a major species in industrial wastewater and natural water, which has high solubility, stability, and mobility and is difficult to remove. In this study, Prussian blue–zerovalent iron nanoparticles (PB-nZVI) were successfully prepared at room temperature. The performance of PB-nZVI in removing Tl(I) was studied and compared with PB and nZVI. The experimental results showed that PB-nZVI can remove Tl(I) efficiently (&gt;97%) in a pH range of 3–9, while the highest removal rates of PB and nZVI for Tl(I) were only 83.8% and 53.1% (pH = 9), respectively. Additionally, the variation of Tl(I) removal efficiency in different relative parameters has been studied, such as Tl(I) initial concentration, dosage of absorbent materials, and coexisting cations (K⁺, Ni²⁺, Pb²⁺, Zn²⁺, Ca²⁺, Mg²⁺, Cd²⁺, and Cu²⁺). PB-nZVI showed extremely high selectivity for Tl(I), and the efficiency of Tl(I) removal was slightly affected by the coexisting cations with 100 and 1000 mg/L. However, the Tl(I) removal by PB and nZVI was significantly inhibited under identical conditions. The involved mechanisms are as follows: adsorption, precipitation, and ion exchange. The synergistic effect of PB and nZVI enables PB-nZVI to efficiently remove thallium from wastewater.</p>","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":null,"pages":null},"PeriodicalIF":5.3,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142609207","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"CuCo-Based Carbonate Hydrosulfide Nanoarray Supported on Carbon Cloth as Electrocatalysts for Glucose Sensing","authors":"Yujie Tian,&nbsp;Qiaoling Wang,&nbsp;Jianning Niu,&nbsp;Jiayu Liang,&nbsp;Yanfei Geng,&nbsp;Xin Liu,&nbsp;Jianlong Wang and Min Ma*,&nbsp;","doi":"10.1021/acsanm.4c0557710.1021/acsanm.4c05577","DOIUrl":"https://doi.org/10.1021/acsanm.4c05577https://doi.org/10.1021/acsanm.4c05577","url":null,"abstract":"<p >Earth-abundant transition-metal-based nanomaterials are recognized as one of the most promising materials for electrochemical sensing. Developing facile methods to prepare transition-metal-based catalysts for nonenzyme glucose sensing is an attractive issue in the electrochemical fields. In this study, we employed carbon cloth (CC) as a self-supporting substrate and developed a nonenzymatic electrochemical glucose platform based on a self-supporting CuCo-based carbonate hydrosulfide nanoarray (CuCoS/CC) via a green sulfurization strategy. In contrast to those of the original catalyst, the electrical conductivity and electrocatalytic activity of CuCoS/CC were significantly enhanced after sulfurization. The developed electrode presented an ultrahigh sensitivity of 12113 μA mM^–1 cm^–2, a wide linear range of 0.25–1883.25 μM, and a low limit of detection (LOD) of 0.29 μM (<i>S</i>/<i>N</i> = 3). Meanwhile, the CuCoS/CC also exhibited satisfactory reproducibility, stability, and anti-interference together with feasibility in actual sample analysis, proving its excellent potential for real-world applications. Our work provides a facile strategy for designing CuCo-based sulfide nanoarrays and could serve as an inspiration for the development of transition-metal-based compounds for enzyme-free glucose sensing.</p>","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":null,"pages":null},"PeriodicalIF":5.3,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142608914","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Oxygen-Deficient Mn2O3 Nanosheets for Dual Colorimetric and Electrochemical Detection of Epinephrine","authors":"Shams Ur Rehman,&nbsp;Sivakumar Musuvadhi Babulal and Hui-Fen Wu*,&nbsp;","doi":"10.1021/acsanm.4c0490410.1021/acsanm.4c04904","DOIUrl":"https://doi.org/10.1021/acsanm.4c04904https://doi.org/10.1021/acsanm.4c04904","url":null,"abstract":"<p >We report using the 2D oxygen-deficient mesoporous Mn₂O₃ nanosheets to act as laccase enzyme mimicked dual colorimetric and electrochemical nanosensors for highly sensitive detection of epinephrine. Scientists have been highly motivated to develop nanomaterial-based sensors for the practical detection of epinephrine (EP) in real samples. EP is a crucial biomarker for different mental disorders, including Parkinson’s disease. Manganese oxides and their composites are extensively utilized as oxidase-mimicked catalysts, in which chromogenic compound is utilized for colorimetric sensing. For the first time, we utilized the 2D Mn₂O₃ nanosheets as laccase-mimicked nanosensors for both colorimetric and electrochemical detection without using any chromogenic compounds. The oxygen-deficient mesoporous structures of the 2D Mn₂O₃ nanosheets provide high surface areas and abundant reactive sites for activation and adsorption of the analytes. When the EP molecules are adsorbed onto the porous structures of the Mn₂O₃ nanosheets, electron transfer occurs and EP converts into adrenochrome, which is a colorful compound. The response of color change was measured in absorption intensity. The linear range of detection of the nanosensor was 1–100 μM, and the limit of the detection (LOD) was 0.25 μM. The Mn₂O₃ nanosheets were further utilized as an electrochemical sensor too for the detection of EP, and the LOD observed for the electrochemical nanosensor was 0.13 μM with a linear range of 500 nM to 325 μM. The nanosensor’s performance was evaluated in blood serum and urine, yielding <i>R</i>² values of 0.9985 and 0.9948, respectively. This highlights the potential of the 2D Mn₂O₃ nanosheets for EP sensing. We believe that our laccase-mimicked 2D Mn₂O₃ nanosheets and their application as dual colorimetric and electrochemical nanosensors is a good platform that can be equally applied for biological and environmental applications.</p>","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":null,"pages":null},"PeriodicalIF":5.3,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acsanm.4c04904","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142608004","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}