ACS Applied Nano Materials最新文献

{"title":"ZnO-TiO2 Binary Compound Core–Shell Nanorods for Selective Sensing of Short-Chain Alcohols","authors":"Yingkai Liu*,&nbsp;Lei Liu,&nbsp;Yujiang Li,&nbsp;Shaoyu Liu,&nbsp;Weibin Zhang*,&nbsp;Ruifeng Zhang,&nbsp;Yao Liu,&nbsp;Qian Rong* and Jie Zheng*,&nbsp;","doi":"10.1021/acsanm.4c0666510.1021/acsanm.4c06665","DOIUrl":"https://doi.org/10.1021/acsanm.4c06665https://doi.org/10.1021/acsanm.4c06665","url":null,"abstract":"<p >The regularly ordered core–shell nanorods provide an effective transport channel for the adsorption and desorption of the target molecules. However, it remains a great challenge to precisely control the shell thickness of the ordered core–shell nanorods and improve the catalytic activity of their surfaces due to the complexity of the reaction system, especially by enhancing their selectivity to short-chain alcohols. Herein, we propose ZnO/TiO₂ core–shell nanorod arrays (NRs) with different shell thicknesses prepared by electron beam evaporation and found that they possess advanced selectivity for short-chain alcohols. The response time of a ZnO/TiO₂ core–shell NR with a TiO₂ shell of 30 nm to 100 ppm isoamyl alcohol is 17 s. Its response to 100 ppm of isoamyl alcohol is 807, which is approximately 158 times that of the pure ZnO NR. The ZnO/TiO₂ NR (30 nm) sensor exhibited excellent selectivity for methanol, ethanol, isopropanol, <i>n</i>-butanol, and isoamyl alcohol. The response to alcohols increased with the increase of the alcohols’ chain length. Its sensing mechanism for short-chain alcohols is explained in terms of adsorption energy, acidity, and electronegativity of H in organic groups by density functional theory in detail. Our results open an alternative route for the design of sensitive materials for the selective detection of short-chain alcohols.</p>","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":"8 12","pages":"5941–5950 5941–5950"},"PeriodicalIF":5.3,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143713972","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":"Anisotropic Bacterial Cellulose/MXene Aerogel Coated with MoS2 Nanosheets for Electromagnetic Wave Adsorption","authors":"Shiqi Li,&nbsp;Qingfeng Zhang,&nbsp;Yixuan Zhang,&nbsp;Shengyong Mo,&nbsp;Xuezhen Qi and Yurong Cai*,&nbsp;","doi":"10.1021/acsanm.5c0026110.1021/acsanm.5c00261","DOIUrl":"https://doi.org/10.1021/acsanm.5c00261https://doi.org/10.1021/acsanm.5c00261","url":null,"abstract":"<p >Loss capacity and impedance matching are critical factors that govern the electromagnetic wave-absorption performance of materials. However, achieving an optimal synergistic balance between these two factors remains a significant challenge. In this study, we fabricate an ultralight and anisotropic aerogel synthesized using directional freeze-drying with bacterial cellulose and MXene as the structural framework. Subsequently, MoS₂ nanosheets were uniformly deposited onto the aerogel via an in situ hydrothermal process, forming nanoarrays that enhance multiple scattering and interfacial polarization. The aerogel demonstrates an ultralow reflection loss of −53.6 dB (2.26 mm thickness) and an ultrawide absorption bandwidth of 8.16 GHz (2.66 mm thickness). The oriented porous architecture and multiphase composition of the bacterial cellulose/MXene aerogel synergistically enhance performance through multiscale loss mechanisms (e.g., conductive loss and polarization loss) and adjustable impedance matching. Furthermore, the aerogel demonstrated excellent thermal insulation. This work provides valuable insights into the rational design of electromagnetic wave-absorbing materials with enhanced adaptability for diverse application scenarios.</p>","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":"8 12","pages":"6094–6105 6094–6105"},"PeriodicalIF":5.3,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143714059","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":"Battery-Free Neuromorphic Computing Based on PMMA/SiO2 Nanoparticle Memristor and Near-Field Communication","authors":"Lin Liu,&nbsp;Jingyu Wang and Yong Yan*,&nbsp;","doi":"10.1021/acsanm.5c0000710.1021/acsanm.5c00007","DOIUrl":"https://doi.org/10.1021/acsanm.5c00007https://doi.org/10.1021/acsanm.5c00007","url":null,"abstract":"<p >The human intelligent perceptional system employs two fundamental modules─sensing and computing─to engage with the external environment. The von Neumann architectures, however, inherently face the memory-wall and power-wall challenges. In response to these issues, neuromorphic computing has emerged as a potential paradigm, minimizing data migration via in-memory computing frameworks and eliminating analog-to-digital conversion through near-sensor processing. Despite this, conventional methods of power supply and data transmission constrain the application of this nanoscale neuromorphic architecture in edge computing. This article presents a battery-free neuromorphic computing approach that integrates memristor-based neuromorphic computing with near-field communication (NFC) transponder chip-assisted power supply and wireless communication. The performance of this system is evaluated based on its ability to classify distinct optical characters. The battery-free power supply ensures energy consumption only during the execution of the classification task, while neuromorphic computing reduces the volume of data to be transferred. Our demonstration offers a promising avenue for the application of neuromorphic computing, particularly in the field of edge computing.</p>","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":"8 12","pages":"5971–5978 5971–5978"},"PeriodicalIF":5.3,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143713973","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":"Bimetallic Ag–Ir/CeO2–Fe2O3 Nanostructured Catalysts with Single-Atom Species for Room-Temperature Nitrophenol Reduction","authors":"Maria V. Grabchenko,&nbsp;Maria V. Chernykh,&nbsp;Mikhail A. Salaev and Grigory V. Mamontov*,&nbsp;","doi":"10.1021/acsanm.5c0118110.1021/acsanm.5c01181","DOIUrl":"https://doi.org/10.1021/acsanm.5c01181https://doi.org/10.1021/acsanm.5c01181","url":null,"abstract":"<p >The preparation of catalysts that can effectively operate under mild conditions remains a challenge in accordance with green chemistry principles. Here, a series of nanostructured CeO₂–Fe₂O₃-supported Ag–Ir bimetallic catalysts with a low total content of metals (2 wt %) is prepared and tested in 4-nitrophenol reduction into 4-aminophenol at room temperature and atmospheric pressure. The 1Ir–1Ag/CeO₂–Fe₂O₃ sample shows the highest activity (<i>k</i> = 1.11 min^–1), which significantly exceeds those of monometallic Ag and Ir counterparts due to the synergistic effect between highly dispersed 2 nm silver nanoparticles and single-atom and cluster iridium species. The interaction of the two metals is confirmed by H₂-TPR and UV–vis spectroscopy and results in a shortening of the induction period and enhanced catalytic activity. The results obtained can serve as a ground to prepare more affordable catalysts, where expensive Ir is partially substituted by more affordable Ag.</p>","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":"8 12","pages":"6255–6265 6255–6265"},"PeriodicalIF":5.3,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143713975","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":"Gold Decoration on Palladium Barley Stripe Mosaic Virus Biotemplate: Implications for Drug Delivery Applications","authors":"Che-Yu Chou,&nbsp;Josephine Lesley Liebrata,&nbsp;Jad W. Khansa,&nbsp;Shirly S. Huang,&nbsp;Akash J. Vaidya,&nbsp;Mruthula Rammohan,&nbsp;Wei-Ling Huang,&nbsp;Jeffrey Miller,&nbsp;Kevin V. Solomon,&nbsp;L. Sue Loesch-Fries and Michael T. Harris*,&nbsp;","doi":"10.1021/acsanm.4c0617010.1021/acsanm.4c06170","DOIUrl":"https://doi.org/10.1021/acsanm.4c06170https://doi.org/10.1021/acsanm.4c06170","url":null,"abstract":"<p >Barley stripe mosaic virus (BSMV) is a promising biotemplate for the mineralization of metal–organic nanorods. Biomineralization of palladium occurs without an external reducing agent; however, the reduction of gold on wild-type BSMV requires a reducing agent. Recently, histidine has been adopted as a capping and reducing agent for the mineralization of gold nanoparticles. BSMV virus-like particles (BSMV-VLPs) tagged with histidine were investigated for direct gold deposition. However, gold nanoparticles were not formed during the mineralization process. Therefore, the aim of this research was to decorate gold nanoparticles onto palladium-coated BSMV (Pd-BSMV). The gold decoration was achieved through the addition of free histidine. X-ray absorption spectroscopy and energy-dispersive X-ray spectroscopy were used to verify the formation of metallic gold, and a kinetic study of the gold decoration process and the pH effect on the morphologies of gold particles was performed. The development of gold-decorated Pd-BSMV will be crucial for therapeutic applications, such as drug delivery, gene therapy, and photothermal therapy.</p>","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":"8 12","pages":"5900–5907 5900–5907"},"PeriodicalIF":5.3,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143714065","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":"Two-Dimensional Nano-PtTe2 for Higher-Order Harmonic Mode-Locking Polarization-Locking Vector Soliton Ultrafast Fiber Laser","authors":"Yutian He,&nbsp;Songshi Xu,&nbsp;Lezheng Wang,&nbsp;Shixian Sun,&nbsp;Xiaoyu Zhao,&nbsp;Faming Ye,&nbsp;Yunqi Tang,&nbsp;Hao Tan,&nbsp;Shenggui Fu,&nbsp;Wenfei Zhang,&nbsp;Guomei Wang,&nbsp;Caixun Bai,&nbsp;Zhao Li,&nbsp;Cheng Lu* and Huanian Zhang*,&nbsp;","doi":"10.1021/acsanm.5c0075310.1021/acsanm.5c00753","DOIUrl":"https://doi.org/10.1021/acsanm.5c00753https://doi.org/10.1021/acsanm.5c00753","url":null,"abstract":"<p >The unique physicochemical properties of nanomaterials have attracted much attention in the field of light modulation. Their small sizes enable them to be characterized by large edge ratios and high surface atom counts. These features make nanomaterials possess high light modulation efficiency. The two-dimensional (2D) nanomaterial PtTe₂ (nano-PtTe₂) is a typical transition metal dichalcogenides (TMD) material. The nano-PtTe₂ has the advantages of narrow and tunable bandgap, excellent stability and easy exfoliation, and thus has good modulation capability for 1.5 μm lasers. We used the liquid-phase exfoliation (LPE) technique to obtain a dispersion of few-layer PtTe₂ nanosheet. PtTe₂-saturable absorber (SA) was obtained by optical deposition using a tapered optical fiber. The saturation absorption curve of PtTe₂–SA was acquired by a self-constructed two-arm balanced detection system. The modulation depth of SA reached 6.6%, while the saturation absorption intensity measured 5.44 MW/cm². Subsequently, we built a ring-shaped ultrafast fiber laser. Polarization-locking vector soliton (PLVS) of conventional soliton (CS) of 852 fs and PLVS of harmonic mode-locking (HML) of 82th order with repetition frequency of 638 MHz were realized. These results show that nano-PtTe₂ has excellent nonlinear absorption properties, and nano-PtTe₂ has the potential to be used in the application of multisoliton fiber laser systems applied in the fields of communication and optical detection et.al. Furthermore, the experimentally obtained PtTe₂–SA has polarization-independent property, which helps to further study the vectorial properties of light.</p>","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":"8 12","pages":"6210–6222 6210–6222"},"PeriodicalIF":5.3,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143713968","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":"Effect of Photodeposited Noble Metal Nanoparticles on the Sacrificial-Agent-Free H2O2 Photosynthesis Performance of g-C3N4","authors":"Guodan Wang,&nbsp;Tengfei Huang,&nbsp;Yongsheng Tan,&nbsp;Shiyan Liu,&nbsp;Rong Wu,&nbsp;Zebo Fang*,&nbsp;Baocheng Yang* and Shunhang Wei*,&nbsp;","doi":"10.1021/acsanm.5c0031110.1021/acsanm.5c00311","DOIUrl":"https://doi.org/10.1021/acsanm.5c00311https://doi.org/10.1021/acsanm.5c00311","url":null,"abstract":"<p >Photodeposition of noble metal nanoparticles is one of the effective strategies to enhance the photocatalytic activity of g-C₃N₄, but there are few reports about its application to improve the photocatalytic production of hydrogen peroxide (H₂O₂) by g-C₃N₄. In this work, different types and surface states of noble metal (Pt, Rh, Ru, Au, and Ag) nanoparticles were loaded on the surface of g-C₃N₄ through photodeposition. Based on their decomposition activity to H₂O₂, it was found that the weak adsorption between noble metals (such as metallic Ag, metallic Au, and negatively charged Au) and H₂O₂ was an important factor in inhibiting H₂O₂ decomposition. In addition, compared with metallic Au and metallic Ag, negatively charged Au was more conducive to O₂ adsorption and activation. More importantly, besides the inhibition of carrier recombination benefiting from cocatalyst loading, the surface plasmon resonance effect of Au facilitated more electrons to participate in the reduction reaction. Thereby, the g-C₃N₄ loaded with negatively charged Au obtained the highest H₂O₂ concentration (16.98 μM in the first hour) in the absence of sacrificial agents through a two-step single-electron O₂ reduction reaction pathway.</p>","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":"8 12","pages":"6125–6132 6125–6132"},"PeriodicalIF":5.3,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143713974","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":"Light-Responsive Hydrogel with Nano-Microstructures for Bacteria Eradication and Tumor Therapy","authors":"Hanyin Hu,&nbsp;Zhuoming Xu,&nbsp;Jintao Liu,&nbsp;Haodong Hu,&nbsp;Haiyang Yang,&nbsp;Jun Ma,&nbsp;Jiayi Chen,&nbsp;Hongwei Xu,&nbsp;Zhenhai Cai,&nbsp;Xiaoguang Wang*,&nbsp;Huanhuan Luo* and Gang Chen*,&nbsp;","doi":"10.1021/acsanm.5c0111610.1021/acsanm.5c01116","DOIUrl":"https://doi.org/10.1021/acsanm.5c01116https://doi.org/10.1021/acsanm.5c01116","url":null,"abstract":"<p >The insufficient immunogenicity of the tumor microenvironment coupled with intratumoral bacteria are important causes of poor prognosis in osteosarcoma patients. The strategy for eliminating intratumoral bacteria and enhancing the immunogenicity of the tumor microenvironment is key to improving the therapeutic effect in osteosarcoma treatment. In this study, light-responsive hydrogel with nano-microstructures was constructed by microfluidic technology, enabling targeting the eradication of tumor bacteria and optically controlled programmed reconstruction of tumor microenvironment, which was composed of a hyaluronic acid-coated microshell and a polyadenylation drug-loaded mesoporous silica nanoparticles core modified by bacteria-targeting LPS antibody and heat-responsive plate. This study aims to promote the selective retention and photoresponsive release of drugs in osteosarcoma and finally realize the combined effect of antibacterial and antineoplastic photoimmunochemotherapy. The distinctive structure of the hydrogel with nano-microstructures enables inhibiting the progression of osteosarcoma, simultaneously eliminating bacteria and enhancing the immunogenicity of the tumor microenvironment. In vitro and in vivo experiments showed that the hydrogel with nano-microstructures improved the therapeutic effect on osteosarcoma by eliminating intratumoral bacteria through the synergistic action of photoimmunochemotherapy. On the other hand, the hydrogel with nano-microstructures activated the expression of CD4 and CD8 in osteosarcoma, regulated the tumor microenvironment, and enhanced the antineoplastic effect. In summary, the hydrogel with nano-microstructures can achieve the combined effect of antibacterial and antineoplastic photoimmunochemotherapy by eliminating the intratumoral bacteria and regulating the microenvironment, which provides an idea for the clinical application of injectable hydrogel with nano-microstructures in the treatment of osteosarcoma.</p>","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":"8 12","pages":"6242–6254 6242–6254"},"PeriodicalIF":5.3,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143713970","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":"Mo2C Supported by Oxidized Carbon Nanotubes for Reinforcing Epoxy Composite","authors":"Qi Wang,&nbsp;Pengfei Xiao,&nbsp;Yaqing Liu*,&nbsp;You Zeng* and Bingwei Zhong*,&nbsp;","doi":"10.1021/acsanm.5c0003310.1021/acsanm.5c00033","DOIUrl":"https://doi.org/10.1021/acsanm.5c00033https://doi.org/10.1021/acsanm.5c00033","url":null,"abstract":"<p >It is crucial to weaken the influence of sacrificing the mechanical properties of epoxy matrices by enhancing the efficiency of flame retardants. Herein, we utilized oxidized carbon nanotube (oCNT) as a dual-functional component, serving as both carbon sources and supports for Mo₂C nanoparticles, and effectively modified N species to oCNT, improved the dispersion of Mo₂C, and combined Mo₂C with oCNT simultaneously. The physical and chemical properties of the resulting Mo₂C@oCNT were characterized. Remarkably, the incorporation of merely 0.18 wt % Mo₂C in the epoxy composite yielded simultaneous and significant improvements in mechanical and flame-retardant properties. The composite exhibited substantial enhancements in key mechanical parameters, with tensile strength, impact strength, and storage modulus increasing by 6.5, 38.1, and 10.5%, respectively. Concurrently, the flame retardancy performance showed marked improvement, as evidenced by a 12% increase in the limiting oxygen index, an 8.6% extension in time to peak heat release rate, and a 52.5% elevation in char yield. Furthermore, critical fire safety parameters demonstrated significant reduction, with the peak heat release rate, total heat release, and total smoke production decreasing by 19.2, 10.2, and 12.7%, respectively. Mo₂C@oCNT/epoxy nanocomposite exhibited the lowest fire growth rate value of 5.05 kW·m^–2·s^–1. The enhanced mechanical performance was attributed to the strong and extensive interfacial interactions that facilitated efficient stress transfer from the epoxy matrix to the strong Mo₂C@oCNT. The superior catalytic dehydrogenation performance of Mo₂C contributed to carbonization and forming protective chars during combustion, leading to enhanced flame retardant performances of Mo₂C@oCNT/epoxy nanocomposite. This work presents a promising strategy for developing high-performance epoxy nanocomposites with balanced mechanical and flame-retardant properties through rational nanohybrid design.</p>","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":"8 12","pages":"5951–5960 5951–5960"},"PeriodicalIF":5.3,"publicationDate":"2025-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143713834","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":"Spinel Chromite MCr2O4 (M = Cu, Mg, Zn) Nanoparticle-Based Sensors for Trace Acetone Detection and Noninvasive Diabetes Diagnosis from Exhaled Breath","authors":"Subhajit Mojumder,&nbsp;Tanushri Das,&nbsp;Sagnik Das,&nbsp;Subhajit Das,&nbsp;Maitrayee Biswas,&nbsp;Srabanti Ghosh and Mrinal Pal*,&nbsp;","doi":"10.1021/acsanm.5c0056110.1021/acsanm.5c00561","DOIUrl":"https://doi.org/10.1021/acsanm.5c00561https://doi.org/10.1021/acsanm.5c00561","url":null,"abstract":"<p >A noninvasive point-of-care diagnostic approach for detecting diabetes through exhaled breath analysis has been developed utilizing a highly sensitive spinel chromite-based sensor to detect acetone, a key biomarker in diabetic patients. Various spinel chromites, namely, MgCr₂O₄, CuCr₂O₄, and ZnCr₂O₄, were synthesized through the chemical route, and required characterizations were performed using relevant sophisticated tools. Our study reveals that MgCr₂O₄ exhibits outstanding sensing capabilities for trace acetone, surpassing other contenders in terms of response, selectivity, response and recovery times, repeatability, reproducibility, and long-term stability. The exceptional sensing performance of MgCr₂O₄ can be attributed to a synergistic combination of chromium’s bivalency, increased oxygen defects, and enhanced active surface area. The selectivity of the MgCr₂O₄ sensor toward acetone is largely governed by the maximum adsorption energy of acetone molecules compared to other interfering gases. The sensor’s efficacy in detecting diabetes was validated using both healthy subjects and simulated breath samples. Furthermore, its practical feasibility was successfully demonstrated through integration into a hand-held, Arduino-based breath analyzer prototype. This breakthrough may have far-reaching implications and poised to make a profound societal impact in the years to come.</p>","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":"8 12","pages":"6188–6200 6188–6200"},"PeriodicalIF":5.3,"publicationDate":"2025-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143713828","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}