ACS Applied Nano Materials最新文献

{"title":"Accelerating Early-Stage Skin Wound Healing with Atomically Hydrogenated Silicene Nanosheets","authors":"Xingyu Zhang*,&nbsp; and ,&nbsp;Jize Dong,&nbsp;","doi":"10.1021/acsanm.5c0253110.1021/acsanm.5c02531","DOIUrl":"https://doi.org/10.1021/acsanm.5c02531https://doi.org/10.1021/acsanm.5c02531","url":null,"abstract":"<p >Delayed healing of skin wounds influences patient life quality and adds a heavy burden to healthcare services, and hence, it requires early-stage acceleration. Improper oxidative stress acts as a primary factor that hinders tissue repair and regeneration. Neutrophils that gather within the wound can produce excessive reactive oxygen species (ROS) to start the subsequent inflammatory cascade effects. However, neutrophil extracellular traps (NETs) generated by the overreactive neutrophils prevent normal function of the fibroblasts in the skin wound tissue. Herein, a practical ROS scavenger, the atomically hydrogenated silicene (HSi) nanosheets, was employed to alleviate the oxidative stress and decrease inflammatory cytokines and redundant NETs in inflamed neutrophils via local hydrogen generation, thus enabling proliferation and migration of the fibroblasts. In a mouse model of a back skin wound, HSi nanosheets accelerated wound healing and tissue reconstruction through rebuilding the normal skin surface and collagen deposition through a biosafe approach. Taken together, the fabricated HSi nanosheets in this study represent a highly promising alternative for skin wound treatment in an early stage.</p>","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":"8 23","pages":"12429–12438 12429–12438"},"PeriodicalIF":5.3,"publicationDate":"2025-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144269868","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":"Smartphone-Assisted Label-Free Bicolor Colorimetric Assay for on-site Detection of 5-Fluorouracil","authors":"Zihui Chen,&nbsp;Cuiping Wu,&nbsp;Yue Guan,&nbsp;Houcheng Zhou,&nbsp;Yiwen Qian,&nbsp;Guoqing Zhao,&nbsp;Lamei Zhou* and Wanqing Yue*,&nbsp;","doi":"10.1021/acsanm.5c0246810.1021/acsanm.5c02468","DOIUrl":"https://doi.org/10.1021/acsanm.5c02468https://doi.org/10.1021/acsanm.5c02468","url":null,"abstract":"<p >5-Fluorouracil (5-FU) is a widely used anticancer drug, and its production and biological metabolic process have serious impacts on the ecological environment. Therefore, developing a platform capable of instantly monitoring 5-FU is critical to address this issue. In this study, we successfully developed folic acid (FA)-functionalized ultrasmall copper-based nanozymes (Cu-FA), which exhibit good dispersibility and peroxidase-like activity (POD-like) in a neutral environment. We further proposed a strategy for bicolor colorimetric detection of urease over a wide detection range by utilizing Cu-FA in synergy with phenolphthalein (PP) in water. This strategy effectively circumvents the acid–base buffering effect and the inconvenience of buffer replacement encountered in conventional assays, thereby improving the accuracy and sensitivity of the results. A label-free bicolor colorimetric sensor was developed for the detection of 5-FU by employing a dual-enzyme cascade reaction involving urease and Cu-FA+PP. Furthermore, the sensor was validated for detection of 5-FU residues in environmental samples in a portable manner. This method effectively bridges the gap left by traditional colorimetric techniques for 5-FU detection and holds promise for applications in environmental monitoring, which is expected to play a significant role in drug production and ecological protection.</p>","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":"8 23","pages":"12413–12422 12413–12422"},"PeriodicalIF":5.3,"publicationDate":"2025-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144269667","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":"Solid Lubrication Performance of Multilayer Ti3CNTx Carbonitrides","authors":"Dario Zambrano*,&nbsp;Bo Wang,&nbsp;Beichen Duan,&nbsp;Paulina Valenzuela,&nbsp;William Gacitúa,&nbsp;Brian C. Wyatt,&nbsp;Babak Anasori and Andreas Rosenkranz*,&nbsp;","doi":"10.1021/acsanm.5c0199310.1021/acsanm.5c01993","DOIUrl":"https://doi.org/10.1021/acsanm.5c01993https://doi.org/10.1021/acsanm.5c01993","url":null,"abstract":"<p >2D MXene nanosheets have gained increasing attention in tribology due to their excellent wear resistance and solid lubrication capabilities. While carbide-based MXenes have been extensively studied, the tribological performance of carbonitride MXenes, especially under dry conditions, has yet to be assessed. Therefore, we studied the mechanical and tribological performance of multilayer Ti₃CNT<i>_<i>x</i></i> coatings, revealing their load-dependent tribochemical response. Using linear-reciprocating ball-on-disk tribometry combined with advanced structural and surface characterization, we demonstrate that Ti₃CNT<i>_<i>x</i></i> coatings provide excellent friction reduction and wear resistance at low loads due to the formation of compact, aligned, and protective tribofilms. Under higher loads, however, the coatings undergo a transition to severe wear dominated by the formation of rutile TiO₂, a behavior not previously observed in carbide-based MXenes (anatase TiO₂). Our findings highlight the critical role of X-site chemistry (C, N, or CN) in governing tribo-oxidation pathways and tribolayer stability, underscoring the influence of carbonitride composition on the long-term performance of MXene coatings in solid lubrication applications, which are essential for aerospace applications, electrical contacts, or dry-running bearings.</p>","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":"8 23","pages":"12261–12271 12261–12271"},"PeriodicalIF":5.3,"publicationDate":"2025-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144269685","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":"3D Self-Supported FeOOH@C Hybrid Nanosheet Arrays as Electrocatalyst for Oxygen Evolution","authors":"Shuiqiang Chen,&nbsp;Fang Su,&nbsp;Yong Gao,&nbsp;Zheng Li and Hua Li*,&nbsp;","doi":"10.1021/acsanm.5c0188210.1021/acsanm.5c01882","DOIUrl":"https://doi.org/10.1021/acsanm.5c01882https://doi.org/10.1021/acsanm.5c01882","url":null,"abstract":"<p >FeOOH has attracted great research attention in the electrocatalytic oxygen evolution reaction (OER) because of its low cost, natural abundance, environmental friendliness, and high intrinsic activity. However, the practical utilization of FeOOH is seriously restricted by its inherent poor conductivity. Herein, the hybridization of FeOOH with N<b>-</b>doped porous carbon (NPC) nanosheets derived from metal–organic framework (MOF) supported on Ni foam (NF) has been proved to be an effective approach to improve the electrocatalytic OER activity of FeOOH. The MOF-derived porous NPC nanosheets have a unique interpenetrating three-dimensional (3D) network architecture, which can not only serve as a highly conductive layer to promote electron transfer but also improve the utilization rate of FeOOH and facilitate mass transport. Owing to the advantages in structure and composition, the as<b>-</b>obtained FeOOH@C/NF exhibits significantly enhanced electrocatalytic performance toward OER in alkaline media, with a current density of 10 mA cm^–2 at an overpotential of 182 mV, a small Tafel slope of 27.9 mV dec^–1, and excellent durability.</p>","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":"8 23","pages":"12202–12209 12202–12209"},"PeriodicalIF":5.3,"publicationDate":"2025-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144269552","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":"Nanocrystalline Hexagonal Boron Nitride Thin Films Deposited by Dynamic Glancing Angle Deposition for UV-Emitting Devices and Detectors","authors":"Saron R. S.de Mello,&nbsp;Felipe Cemin,&nbsp;Fernando G. Echeverrigaray,&nbsp;Mawin J. M. Jimenez,&nbsp;Vanessa Piroli,&nbsp;Fábio J. R. Costa,&nbsp;Carla D. Boeira,&nbsp;Leonardo M. Leidens,&nbsp;Antonio Riul Jr,&nbsp;Carlos A. Figueroa,&nbsp;Luiz F. Zagonel,&nbsp;Antonio R. Zanatta and Fernando Alvarez*,&nbsp;","doi":"10.1021/acsanm.5c0221410.1021/acsanm.5c02214","DOIUrl":"https://doi.org/10.1021/acsanm.5c02214https://doi.org/10.1021/acsanm.5c02214","url":null,"abstract":"<p >This study investigates thin films of hexagonal boron nitride (<i>h</i>-BN), a promising material for the development of UV optoelectronic and wide-band gap semiconductor applications. A comprehensive analysis of the structural and optical properties of <i>h</i>-BN films deposited by radio frequency sputtering, using both stationary and Dynamic Glancing Angle Deposition (DGLAD) techniques, demonstrates that the film nanostructure can be effectively tailored by controlling key deposition parameters such as substrate bias, deposition plasma composition, and substrate oscillation. The introduction of hydrogen into the deposition atmosphere promotes the formation of <i>turbostratic</i> polycrystalline films with tunable crystallite sizes and significantly impacts the bonding environment, leading to a controlled shift of the optical band gap from ∼3.7 to ∼4.2 eV. Substrate oscillation modulates the angle of precursor impinging on the substrate, influencing the nano- and microstructure of the films and their optical properties. The physical characteristics introduced by the specific method of preparation of <i>h-</i>BH, such as morphological and topographical features, were characterized via SEM and AFM. At the same time, photoluminescence (PL) measurements revealed defect-related emission states, highlighting the influence of structural disorder on radiative transitions. Importantly, the DGLAD approach emerges as a useful strategy to engineer the structural and optical features of the <i>h</i>-BN films. The reported findings provide valuable insights into the correlation between growth dynamics, crystallographic disorder, and optoelectronic properties, reinforcing the potential of <i>h</i>-BN for integration into UV photodetectors, light-emitting devices, and other possible wide-bandgap electronic applications such as sensors.</p>","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":"8 23","pages":"12380–12392 12380–12392"},"PeriodicalIF":5.3,"publicationDate":"2025-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144269588","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":"Lead-Free Copper Halide LEDs: Leapfrogging in Performance with Device Engineering Employing Coevaporation of Precursors with Nanoscale Process Control","authors":"Anjali K. Sajeev,&nbsp;Kavya Rajeev and K. N. Narayanan Unni*,&nbsp;","doi":"10.1021/acsanm.5c0125210.1021/acsanm.5c01252","DOIUrl":"https://doi.org/10.1021/acsanm.5c01252https://doi.org/10.1021/acsanm.5c01252","url":null,"abstract":"<p >Lead-free copper halide light-emitting diodes (LEDs) have emerged as a promising alternative to perovskite LEDs, particularly in the context of environmental challenges. This study investigates the performance enhancement of cesium copper iodide (CsCu₂I₃) LEDs through device engineering techniques, including precursor coevaporation, cohost engineering, and process optimization. Coevaporation of cesium iodide (CsI) and copper iodide (CuI) offers better control over film composition compared with conventional techniques such as wet chemical synthesis or solution processing, thereby simplifying the device fabrication. This dry deposition method minimizes issues related to solvent residues and simplifies the fabrication process. Incorporating the cohosts, 1,3,5-tri(m-pyridin-3-ylphenyl)benzene (TmPyPB) and 4,4’,4-tris(carbazol-9-yl)triphenylamine (TcTa), in the emissive layer improves charge balancing and film formation, enhancing overall performance. The optimal results were achieved with a 6:1 cohost ratio and a 2.5% CsCu₂I₃ doping ratio, resulting in a maximum luminance of 6278 cd/m², a current efficiency (CE) of 4.14 cd/A, a power efficiency (PE) of 1.22 lm/W, and an external quantum efficiency (EQE) of 1.44%. The substrate temperature of 60 °C further influenced device performance, with almost 50% improvement in EQE, reaching 2.14%. The device improvements are a result of the nanoscale control over film morphology, composition, and interface quality enabled using controlled coevaporation. Overall, this study highlights the potential of coevaporation of precursors with cohosts and the benefits of substrate temperature in fabricating high-performance and stable CsCu₂I₃-based LEDs.</p>","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":"8 23","pages":"11896–11905 11896–11905"},"PeriodicalIF":5.3,"publicationDate":"2025-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144269555","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":"Carbon Dot- and Curcumin Dye-Based Dual-Emission Fluorescence Ratiometric Probes for Rapid Smartphone Detection of Brilliant Blue in Food","authors":"Fen Gao,&nbsp;Kexin An,&nbsp;Xinwei Chen,&nbsp;Yunhui Fu,&nbsp;Jing Li,&nbsp;Aoxue Zhang,&nbsp;Li Zhang*,&nbsp;Hongyan Jia* and Wei Bian*,&nbsp;","doi":"10.1021/acsanm.5c0220710.1021/acsanm.5c02207","DOIUrl":"https://doi.org/10.1021/acsanm.5c02207https://doi.org/10.1021/acsanm.5c02207","url":null,"abstract":"<p >Brilliant blue (BB), a synthetic food additive widely employed in commercial food products, such as beverages and confectioneries, has raised health concerns due to potential risks associated with prolonged consumption and excessive intake. This necessitates the development of rapid analytical methods for BB monitoring in food matrices. Herein, we present a ratiometric fluorescent probe system integrating red-emitting carbon dots (R-CDs) with curcumin (Cur) for sensitive BB detection. The R-CDs were synthesized through a hydrothermal method using phosphoric acid and <i>o</i>-phenylenediamine as precursors. In this design, the R-CDs function as the responsive signal element, while Cur serves as an internal reference due to its exceptional photostability. The proposed sensing platform demonstrates BB concentration-dependent fluorescence quenching of R-CDs through a dual mechanism involving the inner filter effect and static quenching interactions. A linear correlation (<i>R</i>² = 0.996) was established between the fluorescence intensity ratio (F₅₆₅/F₆₂₄) and BB concentrations ranging from 0 to 5.5 μM, achieving a detection limit of 67.78 nM. The practical applicability of probe was validated through successful BB quantification in commercial beverages and fruit juices, showing recovery rates of 97–109%. Notably, we developed a portable smartphone-assisted detection platform utilizing RGB color analysis, enabling real-time onsite visual monitoring. This ratiometric fluorescence strategy combining R-CDs and Cur establishes a reliable analytical approach characterized by enhanced accuracy, precision, and anti-interference capability compared with single-signal detection systems, demonstrating significant potential for food safety applications.</p>","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":"8 23","pages":"12322–12328 12322–12328"},"PeriodicalIF":5.3,"publicationDate":"2025-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144269686","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":"Enhancing Luminescence in Lanthanide-Doped Fluoride Nanoparticles via Oil-Thermal Annealing Strategy for Efficient X-ray-Excited Photodynamic Therapy","authors":"Bang Yao,&nbsp;Xiaoxu Liu*,&nbsp;Fanyuan Xu,&nbsp;Zuhong Tian,&nbsp;Yang Li,&nbsp;Mengyan Dai,&nbsp;Ruijing Li,&nbsp;Hongbing Lu* and Wenli Zhang*,&nbsp;","doi":"10.1021/acsanm.5c0101310.1021/acsanm.5c01013","DOIUrl":"https://doi.org/10.1021/acsanm.5c01013https://doi.org/10.1021/acsanm.5c01013","url":null,"abstract":"<p >X-ray excited photodynamic therapy (X-PDT), a synergistic therapy combining radiotherapy (RT) with photodynamic therapy (PDT), not only demonstrates more effective therapeutic outcomes but also overcomes the limitation of PDT’s shallow penetration depth. Lanthanide-doped fluoride nanoparticles exhibit excellent X-ray excitation optical luminescence (XEOL), tunable luminescence, and favorable biosafety, making them promising for X-ray excited photodynamic therapy (X-PDT). However, excessive surface defects in nanoparticles diminish luminescence efficiency and quench XEOL, significantly compromising the efficacy of X-PDT. Here, we report an oil-thermal annealing strategy to obtain small-sized nanocrystals with strong luminescence by repairing surface defects and improving the luminescence intensity while keeping the particle morphology and size. Specifically, the XEOL intensity of NaYF₄:Er@NaYF₄ core–shell nanocrystals is enhanced by about 11.6 times compared to the pristine NaYF₄:Er core nanocrystals after Y/Na oil-thermal annealing treatment. This demonstrates that the oil-thermal annealing treatment is able to remodel the surface lattice structure, effectively inhibiting nonradiative recombination and improving crystallinity. Water-soluble modification of annealed NaYF₄:Er@NaYF₄ core–shell nanocrystals via 2-aminoethylphosphonic acid (AEP) ligand exchange and loading Rose Bengal (RB) photosensitizer showed good antitumor efficacy against CT26 cancer cells <i>in vitro</i> and <i>in vivo</i>, with an <i>in vivo</i> tumor inhibition rate of 87.6% and no side effects. This study provides insight into the future synthesis and luminescence enhancement of high-performance X-ray excited luminescent nanoparticles and their role in reducing side effects and enhancing therapeutic efficacy in X-PDT applications.</p>","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":"8 23","pages":"11835–11846 11835–11846"},"PeriodicalIF":5.3,"publicationDate":"2025-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144269812","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":"Graphene Oxide/Silver/l-Arginine Nanocomposite for Healing of Drug-Resistant Bacteria-Infected Wounds","authors":"Jinyao Zheng,&nbsp;Juan Qin,&nbsp;Yuanhao Zhang,&nbsp;Zongjia Li,&nbsp;Miaomiao Zhang,&nbsp;Qianyu Guo,&nbsp;Ying Chen,&nbsp;Yu Chen,&nbsp;Wei Wei,&nbsp;Xiue Jiang and Jilin Tang*,&nbsp;","doi":"10.1021/acsanm.5c0147910.1021/acsanm.5c01479","DOIUrl":"https://doi.org/10.1021/acsanm.5c01479https://doi.org/10.1021/acsanm.5c01479","url":null,"abstract":"<p >Infected wound healing is a multifaceted biological process, particularly in the context of the emergence of antibiotic-resistant bacteria that compromise the efficacy of conventional treatments, thereby rendering the management of infected wounds exceedingly challenging. Developing highly effective antibacterial materials to fight resistant bacteria and promote wound healing remains a major challenge. In this study, a graphene oxide (GO)-based synergistic multifunctional nanomaterial, GO-Ag-<span>l</span>-Arg, is developed to promote wound healing by effectively combating antibiotic-resistant bacterial infections and promoting angiogenesis. The excellent antibacterial activity of GO-Ag-<span>l</span>-Arg is attributed to the synergistic effect of highly dispersed silver nanoparticles (Ag NPs) and <span>l</span>-Arginine (<span>l</span>-Arg). GO-Ag-<span>l</span>-Arg can effectively avoid the aggregation of Ag NPs and fully exert the antibacterial ability of Ag NPs in GO-Ag-<span>l</span>-Arg. By precisely regulating the pH, <span>l</span>-Arg is further loaded onto the GO-Ag nanosheets through an esterification reaction between the hydroxyl on the surface of GO and <span>l</span>-Arg. The highly positively charged guanidyl in <span>l</span>-Arg can interact with negatively charged bacteria, improving the targeting ability between the nanocomposite and bacteria and further enhancing the antibacterial effect of GO-Ag-<span>l</span>-Arg. At the same time, GO-Ag-<span>l</span>-Arg can produce nitric oxide (NO) under the action of cells, thus effectively promoting angiogenesis. The <i>in vivo</i> experiments show GO-Ag-<span>l</span>-Arg exhibits an outstanding ability to accelerate the healing of bacterial-infected wounds by inhibiting bacterial growth and stimulating angiogenesis at the wound site, offering a promising strategy for the treatment of wounds infected by drug-resistant bacteria.</p>","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":"8 23","pages":"11940–11951 11940–11951"},"PeriodicalIF":5.3,"publicationDate":"2025-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144269473","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":"A Self-Powered p-CuO/n-Si Heterojunction-Type Ultraviolet Photodetector","authors":"Runmin Wu,&nbsp;Hailin Yang,&nbsp;Yiping Cheng,&nbsp;Sidi Huang and Chengyun Zhang*,&nbsp;","doi":"10.1021/acsanm.5c0197010.1021/acsanm.5c01970","DOIUrl":"https://doi.org/10.1021/acsanm.5c01970https://doi.org/10.1021/acsanm.5c01970","url":null,"abstract":"<p >A self-powered p-CuO/n-Si ultraviolet (UV) photodetector (PD) operating without a bias voltage was prepared by using femtosecond (fs) laser direct writing and magnetron sputtering coating technology. A large area of randomly distributed nanopore structures (NPs) was induced on the n-Si surface by a fs laser, enhancing light absorption. A p-CuO nanofilm was sputtered on a fs-laser treated Si surface to construct a PD with a heterojunction region. The PD with NPs (CuO/NPs-Si PD) exhibits exceptional performance at zero bias, with an ultralow dark current (∼4 pA) and a photogenerated current (2.5 nA) under 365 nm UV illumination (5 mW/cm²), achieving an impressive current response ratio of ∼639.25. In contrast, the untreated CuO/Si PD shows no stable photocurrent, highlighting the critical role of laser-induced NPs. The device exhibits selective UV sensitivity, with an optimal response at 365 nm compared to other wavelengths at the same light intensity. The comparison between CuO/NPs-Si and CuO/Si PDs demonstrated that the former has good response, practicality, and repeatability due to the incorporation of NPs on the n-Si surface. These structures increase the adsorbable specific surface area of p-CuO, thereby further enhancing the photovoltaic effect. The detector is simple to prepare and has minimal dark current noise and high photogenerated current switching ratio. The fs laser-induced NPs eliminate the transient sharp peak currents dominated by the pyroelectric effect of the sensor. Furthermore, the introduction of a silicon substrate also improves the possibility of device-integrated application. Structural features and UV detection performance of the device determine its potential application prospects.</p>","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":"8 23","pages":"12243–12250 12243–12250"},"PeriodicalIF":5.3,"publicationDate":"2025-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144269551","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}