Nanotechnology最新文献

{"title":"Prediction by density functional theory of auxetic behaviour in hydroxyl-terminated Mo₂B₂MBenes.","authors":"Di Zhao, Mengqing Hu, Ming Zhou, Mingli Li, Lei Zhang, Irfan Ali Soomro, Feixue Han, Liang Wang, Porun Liu, Yuan Mei, Yun Wang","doi":"10.1088/1361-6528/ae0e2a","DOIUrl":"10.1088/1361-6528/ae0e2a","url":null,"abstract":"<p><p>Auxetic materials exhibit unique properties, such as enhanced energy absorption and increased shear stiffness, making them beneficial for various applications. In this study, we employ first-principles calculations to investigate the structural, mechanical, and electronic properties of pristine and terminated Mo₂B₂MBenes. Our findings reveal that some hexagonal Mo₂B₂(OH)₂configurations present a remarkable negative Poisson's ratio, indicating auxetic behaviour. This mechanical response is attributed to its unique bridging coordination of hydroxyl groups. The analysis of their structural and electronic properties establishes a clear correlation between termination type, bond characteristics, and the resulting mechanical properties. Our theoretical results, therefore, provide valuable insights for the design of novel 2D auxetic materials.</p>","PeriodicalId":19035,"journal":{"name":"Nanotechnology","volume":" ","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145206921","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Insight into the synthesis of colloidal cesium tin halide perovskite nanocrystals: size, shape control and phase transition.","authors":"Pujun Niu, Chengyang Wang, Jiawen Li, Jun Zhu","doi":"10.1088/1361-6528/ae0e29","DOIUrl":"10.1088/1361-6528/ae0e29","url":null,"abstract":"<p><p>Colloidal nanocrystals (NCs) of fully inorganic perovskites have attracted much attention for their wide optoelectronic applications. Cesium tin halide (CsSnX₃, X= Cl, Br, I) NCs possess the advantage of environmental friendliness. While there have been some reports on the synthesis of CsSnX₃NCs, the systematic study on turning the size and morphology through reaction temperature and surface ligands is lacking. In this report, CsSnX₃NCs were synthesized using a hot injection method with three precursors for Cs, Sn and X sources, respectively. We systematically altered the reaction temperature and ligands concentration to investigate their influence on the NC products. Upon decreasing the reaction temperature from 180 °C to 90 °C, the photoluminescence peak underwent a blue shift from 869 nm to 847 nm. Nanorods with a diameter as low as 3 nm were achieved at a lower reaction temperature, while cubic NCs with a size of 15 nm were achieved at the higher reaction temperature. The NCs show an increasing size and a wider distribution with the concentration of oleic acid and oleylamine (OAm) increasing. However, hexagonal Cs₄SnI₆NCs other than CsSnI₃NCs will be produced when the OAm concentration is larger than 0.4 M. The study shed a light on the controllable synthesis of Sn-based perovskite NCs.</p>","PeriodicalId":19035,"journal":{"name":"Nanotechnology","volume":" ","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145206980","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhanced bendability and viscoelastic behavior in high-quality 2H-SiC@SiO₂nanowires.","authors":"Zhifeng Chen, Cairong Ding, Jingying Sun, Yong Sun, Chengxin Wang","doi":"10.1088/1361-6528/ae0419","DOIUrl":"10.1088/1361-6528/ae0419","url":null,"abstract":"<p><p>Silicon carbide nanowires (SiC NWs) combine the benefits of bulk SiC materials with the properties of low-dimensional nanomaterials. They are known for their excellent mechanical strength and durability, which are critical for their potential applications in high-stress environments and micro-nano functional systems. Here, the mechanical properties and deformation mechanisms of 2H-SiC NWs with rare defects in the [0001] orientation are reported. A series of<i>in situ</i>operational experiments were carried out to evaluate the mechanical behavior and deformation processes of the nanowires, obtaining dynamic images, quantitative force profiles, stress-strain curves and lattice evolution during bending. Experimental results indicate that the maximum bending strain reached 17.7%, and the viscoelastic behavior during the recovery process after fracture was captured. Based on the elastic deformation and brittle fracture behavior of SiC NWs, this is attributed to the presence of the amorphous SiO₂layer encapsulating the surface of the nanowires, which can also enhance their flexibility, enabling their application under higher pressure conditions. These advancements contribute to the further mechanical design of SiC NWs, expand the photonic application scenarios, and promote their application in high-performance electronic devices.</p>","PeriodicalId":19035,"journal":{"name":"Nanotechnology","volume":" ","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145015848","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"On-chip silicon thermal diode: nanostructure spacing dependence of the thermal rectification ratio.","authors":"Carlotta Ragazzo Capello, Antonella Masci, Elisabetta Dimaggio, Giovanni Pennelli","doi":"10.1088/1361-6528/ae0b78","DOIUrl":"10.1088/1361-6528/ae0b78","url":null,"abstract":"<p><p>We present a silicon-based thermal diode integrated on a chip, capable of direction-dependent heat transport. The device is built upon a thin suspended membrane featuring an asymmetric arrangement of nanometer-scale holes. Integrated nano-heaters and resistance-based temperature sensors enable full electrical control and measurement of the thermal response. Two nanofabrication methods were used for the nanohole patterns: anisotropic chemical etching using potassium hydroxide combined with electron beam patterning, and direct nanostructuring using focused ion beam (FIB). Three-dimensional simulations based on models reconstructed from electron microscopy images were used to interpret the experimental results and to quantify the thermal conductivity and the thermal rectification performance. A rectification ratio of 0.26 was achieved in devices fabricated with the FIB method. These findings demonstrate the potential for implementing nanoscale thermal rectification in scalable silicon platforms compatible with conventional microelectronic technologies, with promising applications in thermal logic, energy conversion, and adaptive thermal management.</p>","PeriodicalId":19035,"journal":{"name":"Nanotechnology","volume":" ","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145150208","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Highly porous CeO₂nanoparticles for real-time hydrogen gas sensing application at room temperature.","authors":"Asha P Shirni, Madhura N Talwar, Ashadevi K S, Sai Prasad Goud R, Naresh Nalajala, Ganapati V Shanbhag, Nageswara Rao S V S, Gnana Prakash A P","doi":"10.1088/1361-6528/ae0ccf","DOIUrl":"10.1088/1361-6528/ae0ccf","url":null,"abstract":"<p><p>Hydrogen (H₂) is widely recognized as a clean and sustainable energy source, but its highly flammable nature emphasizes the crucial need for efficient, room-temperature (RT) H₂gas sensors. In the present study, cerium oxide (CeO₂) nanoparticles were synthesized using a facile solution combustion synthesis (SCS) and explored for H₂gas sensing at RT. The synthesized CeO₂nanoparticles were comprehensively characterized to evaluate their structural, morphological, optical and surface properties. The sample exhibited highly porous morphology with mesoporous structures, has a crystallite size of 14.5 nm with an average particle size of 46 nm, a high surface area of 142 m²g^-1and a lower bandgap of 2.28 eV. These characteristics enabled enhanced gas adsorption and rapid surface reactions on the material. The CeO₂-based sensor demonstrated excellent sensitivity at RT, exhibiting a notable response of 4% even at a low concentration of 1000 ppm H₂gas. The peak response of 52.3% was observed for 10000 ppm of H₂gas and the results obtained showed linear response with increasing concentrations. The sensor exhibited brilliant repeatability, long-term stability over 200 days, high selectivity and the limit of detection of 106 ppm at RT. The enhanced sensing performance is attributed to the synergistic effect of mesoporosity, high surface area and favorable Knudsen diffusion within the porous network of CeO₂. This study establishes SCS-derived CeO₂as a promising material for low-cost, energy-efficient and real-time H₂sensing at ambient conditions.</p>","PeriodicalId":19035,"journal":{"name":"Nanotechnology","volume":" ","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145192227","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Highly Sensitive Ultraviolet Power Meter based on Two-Dimensional van der Waals Heterostructure.","authors":"Bangchi Huang, Xiang Li, Jianlin Shi, Zhipeng Zhong, Yezhao Zhuang, Yizihan Zhang, Tie Lin, Xiangjian Meng, Hai Huang, Junhao Chu, Jiao Peng","doi":"10.1088/1361-6528/ae1141","DOIUrl":"https://doi.org/10.1088/1361-6528/ae1141","url":null,"abstract":"<p><p>The increasing demand for high-precision ultraviolet (UV) detection in applications such as environmental monitoring, industrial inspection, and public safety necessitates the development of advanced UV power meters with high sensitivity, and low detection limits. In this work, we demonstrate a high-performance UV photodetector based on the interface barrier controlled two-dimensional heterostructure of Au/hBN/MoS 2 on Si/SiO 2 substrate, which can function as a precise UV power meter with high precision. The device exhibits an ultrahigh photoresponsivity up to 1.03×10 5 A/W to 254 nm UVC light with an excellent spectral selectivity. In particular, the distinctive inverse relationship between the response time and incident light intensity enables accurate power calibration for incident UV irradiation. The device, demonstrated in a TO-46 packaged configuration, is capable of detecting UV light with intensities as low as 0.7 μW/cm 2 . Its measurement accuracy is verified through the power radiation law, and the detection limit surpasses that of commercial UV power meters. These results highlight a promising strategy for developing next-generation UV photodetectors based on two-dimensional heterostructures.</p>","PeriodicalId":19035,"journal":{"name":"Nanotechnology","volume":" ","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145258629","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Geometrically asymmetricBC3monolayer as a thermal diode: a molecular dynamics study.","authors":"Farrokh Yousefi, Omid Farzadian, Mehdi Shafiee","doi":"10.1088/1361-6528/ae0cd2","DOIUrl":"10.1088/1361-6528/ae0cd2","url":null,"abstract":"<p><p>In this study, we employ non-equilibrium molecular dynamics simulations to investigate the unique thermal transport properties of an asymmetricBC3monolayer. We demonstrate the existence of<i>infinite thermal rectification</i>, wherein heat flows preferentially in one direction with complete suppression in the reverse, mimicking the behavior of an electrical diode. This phenomenon is attributed to the<i>negative thermal conductivity</i>that arises below a critical temperature difference, referred to as the transition point, where the heat counterintuitively flows from the cold reservoir to the hot one. Furthermore, the system exhibits a spontaneous heat current, allowing persistent heat flow even in the absence of an applied temperature gradient. These remarkable behaviors suggest promising applications in passive cooling, fuel-free refrigeration, and thermal logic devices. We further analyze the impact of geometric and thermal parameters, including length, width, and temperature, on the system's heat conduction and rectification performance. To explain the underlying mechanisms, we propose an analytical model based solely on geometric asymmetry, which shows excellent agreement with our simulation results. Overall, our findings establish theBC3monolayer as a promising platform for efficient nanoscale thermal control.</p>","PeriodicalId":19035,"journal":{"name":"Nanotechnology","volume":" ","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145192193","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Rotational chemical bath deposited flexible MnO₂/MXene thin film as an electrode for all solid state asymmetric supercapacitor.","authors":"Rutuja A Chavan, Gokul P Kamble, Akash S Rasal, Sanjay S Kolekar, Jia-Yaw Chang, Anil Vithal Ghule","doi":"10.1088/1361-6528/ae0cd0","DOIUrl":"10.1088/1361-6528/ae0cd0","url":null,"abstract":"<p><p>MXenes are stealing the spotlight due to their metallic conductivity and hydrophilicity; however, the restacking of 2D layers in MXene hampers the electrochemical performance. On the contrary, MnO₂is considered a promising electrode material for its variable oxidation states, but its weak conductivity limits practical applications. Taking the complementary properties, studies on the<i>in-situ</i>synthesis of MnO₂@MXene by chemical bath deposition (CBD) for energy-related (supercapacitor) applications have not yet been explored. Thus, exploring the opportunity for the first time to examine the performance of MnO₂/Ti₃C₂T<i>_x</i>supercapacitor applications by directly growing nano architectures on a flexible stainless steel mesh substrate utilising a binder-free synthesis approach was of our interest. With this motivation, the present investigation deals with a MnO₂/Ti₃C₂T<i>_x</i>(MnO₂/MXene) composite thin film designated as an MMC electrode deposited on the stainless steel mesh (300 mesh size) via an<i>in-situ</i>modified CBD method called rotational CBD (R-CBD). The synthesised MMC exhibits an excellent specific capacitance of 1130 F g^-1when compared to MnO₂(628.3 F g^-1) and MXene (32.5 F g^-1) at a current density of 1 mA cm^-2. A flexible MnO₂/MXene//MXene-based asymmetric supercapacitor device exhibited specific capacitance of 43.7 F g^-1at 2 mA cm^-2current density, maximum energy density (6.06 Wh kg^-1), and power density (0.6 kW kg^-1).</p>","PeriodicalId":19035,"journal":{"name":"Nanotechnology","volume":" ","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145192186","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Pseudo-SAMOs array in positively charged semiconductor single-walled carbon nanotubes.","authors":"S A Votyakov, A V Osadchy, E D Obraztsova","doi":"10.1088/1361-6528/ae08bc","DOIUrl":"10.1088/1361-6528/ae08bc","url":null,"abstract":"<p><p>Super Atom Molecular Orbitals (SAMOs) are electronic excited states found in fullerenes in which an electron is excited to one or, more generally, several virtual orbitals with hydrogen like character. The existence of hydrogen-like metastable SAMO states has previously been demonstrated both experimentally and theoretically in fullerenes. In single-walled carbon nanotubes (SWCNTs), the existence of similar states with a maximum in the center of the hollow structure was theoretically demonstrated. In fullerenes, the SAMOs were classified according to their localization form by the orbital quantum number and named s, p, d-SAMOs. In this paper, we show the existence of different states with a maximum in the center of the SWCNTs, which are called pseudo-SAMOs. For the first time in SWCNTs, high-energy pseudo-SAMOs, which appear under high positive charging of the structure, have been demonstrated. As the positive charge of the SWCNT increases, the number of these states also increases as the depth of the Coulomb potential well increases. In the cross-section of the nanotube, the pseudo-SAMOs resemble the SAMOs in fullerenes, but due to the cylindrical symmetry of the nanotube, their shape along the tube axis z deviates from the shape of spherically symmetric wave functions. It is shown that quantization of pseudo-SAMOs along the<i>z</i>-axis occurs in finite SWCNTs, and the pseudo-z quantum number is used in addition to their characterization. For pseudo-SAMOs, the general set of quantum numbers does not repeat: in the case of invariance of the principal and orbital quantum numbers, the magnetic quantum number (the orientation of the orbital in space) changes. In the case of finite structures for pseudo-SAMOs with the same principal and orbital quantum number, the pseudo-z quantum number increases with increasing state number. The lifetimes of the pseudo-SAMOs in the finite SWCNT were estimated. In this nanotube, the lifetime of the pseudo-SAMOs is 1-2 orders of magnitude longer than the lifetime of the surface-localized states and is generally in the order of 10^-8s.</p>","PeriodicalId":19035,"journal":{"name":"Nanotechnology","volume":" ","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145086483","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhanced cytotoxicity of cisplatin-loaded Brij S100-alginate-taurine nanogels against HeLa cervical cancer cells.","authors":"Phuong Le Thi, Hoai Tam Nguyen, Viet Quoc Nguyen, Ha Tran Nguyen, Tien Thinh Nguyen, Van Toan Nguyen","doi":"10.1088/1361-6528/ae0cd1","DOIUrl":"10.1088/1361-6528/ae0cd1","url":null,"abstract":"<p><p>Water-insoluble anti-cancer drug delivery systems play a vital role in enhancing the effectiveness, stability, and selectivity of chemotherapeutic agents. By improving these properties, such systems offer better clinical outcomes, reduced systemic toxicity, and expanded therapeutic options, particularly for cancers that exhibit resistance to conventional treatments. In this context, nanogel-based delivery platforms constructed from Brij S100 grafted with alginate have demonstrated considerable promise. Two formulations were studied: Brij-Alg and Brij-Alg-Tau, the latter featuring surface modification of Brij-Alg nanogel particles with taurine molecules. These nanogels were used to encapsulate the anti-cancer drug cisplatin. The resulting drug-loaded nanogels exhibited desirable physicochemical characteristics, including optimal particle size, morphology, surface charge, and controlled drug release profiles suitable for targeted drug delivery applications. Importantly, both Brij-Alg and Brij-Alg-Tau nanogels displayed excellent biocompatibility, with minimal cytotoxicity toward fibroblast cells, indicating their safety for biological use. Cytotoxicity assay against the HeLa cervical cancer cell line revealed that Brij-Alg-Tau/CIS nanogels induced significantly greater cell death than both free CIS and Brij-Alg/CIS nanogels. The enhanced cytotoxicity is attributed to improved cellular uptake and sustained drug release enabled by the taurine-functionalized nanogel structure. These findings suggest that Brij-Alg-Tau nanogels are a promising vehicle for CIS delivery and hold strong potential for advancing cervical cancer therapy.</p>","PeriodicalId":19035,"journal":{"name":"Nanotechnology","volume":" ","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145192259","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}