Nanotechnology最新文献_第6页

CRISPR-based strategies for sample-to-answer monkeypox detection: current status and emerging opportunities. 基于 CRISPR 的猴痘样本检测策略：现状与新机遇》。

IF 2.9 4区材料科学

Nanotechnology Pub Date : 2024-11-04 DOI: 10.1088/1361-6528/ad892b

Md Ahasan Ahamed, Anthony J Politza, Tianyi Liu, Muhammad Asad Ullah Khalid, Huanshu Zhang, Weihua Guan

{"title":"CRISPR-based strategies for sample-to-answer monkeypox detection: current status and emerging opportunities.","authors":"Md Ahasan Ahamed, Anthony J Politza, Tianyi Liu, Muhammad Asad Ullah Khalid, Huanshu Zhang, Weihua Guan","doi":"10.1088/1361-6528/ad892b","DOIUrl":"10.1088/1361-6528/ad892b","url":null,"abstract":"The global health threat posed by the Monkeypox virus (Mpox) requires swift, simple, and accurate detection methods for effective management, emphasizing the growing necessity for decentralized point-of-care (POC) diagnostic solutions. The clustered regularly interspaced short palindromic repeats (CRISPR), initially known for its effective nucleic acid detection abilities, presents itself as an attractive diagnostic strategy. CRISPR offers exceptional sensitivity, single-base specificity, and programmability. Here, we reviewed the latest developments in CRISPR-based POC devices and testing strategies for Mpox detection. We explored the crucial role of genetic sequencing in designing crRNA for CRISPR reaction and understanding Mpox transmission and mutations. Additionally, we showed the integration of CRISPR-Cas12 strategy with pre-amplification and amplification-free methods. Our study also focused on the significant role of Cas12 proteins and the effectiveness of Cas12 coupled with recombinase polymerase amplification (RPA) for Mpox detection. We envision the future prospects and challenges, positioning CRISPR-Cas12-based POC devices as a frontrunner in the next generation of molecular biosensing technologies.","PeriodicalId":19035,"journal":{"name":"Nanotechnology","volume":" ","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11533882/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142470508","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

NiO/MnO₂coated on carbon felt as an electrode material for supercapacitor applications. 碳毡上包覆的 NiO/MnO2 作为超级电容器应用的电极材料。

IF 2.9 4区材料科学

Nanotechnology Pub Date : 2024-11-04 DOI: 10.1088/1361-6528/ad87fa

Sadegh Azizi, Mohammad Bagher Askari, Seyed Mohammad Rozati, Mojtaba Masoumnezhad

{"title":"NiO/MnO2coated on carbon felt as an electrode material for supercapacitor applications.","authors":"Sadegh Azizi, Mohammad Bagher Askari, Seyed Mohammad Rozati, Mojtaba Masoumnezhad","doi":"10.1088/1361-6528/ad87fa","DOIUrl":"10.1088/1361-6528/ad87fa","url":null,"abstract":"Transition metal oxides have demonstrated excellent capability for charge storage when used in supercapacitor electrodes. This study undertook the hydrothermal synthesis of bimetallic nickel and manganese oxide (NiO/MnO2) on a carbon-felt (CF) substrate. NiO/MnO2/CF electrode was characterized and examined in a three-electrode system in a potassium hydroxide electrolyte. Cyclic voltammetry, electrochemical impedance spectroscopy, and galvanostatic charge-discharge analyses revealed Faradaic behavior during charge storage, a specific capacity of 1627 F g-1, and a stability of 96.8% after 5000 consecutive charge-discharge cycles. Subsequent investigations were conducted in a two-electrode system for constructing a symmetrical supercapacitor using the NiO/MnO2/CF electrode. The energy and power densities were determined as 43Wh kg-1and 559 W kg-1. Additionally, the stability of the constructed supercapacitor device was examined over 5000 consecutive cycles, verifying a 92% stability through charge-discharge cycles. Finally, the fabricated supercapacitor was utilized to power an LED lamp, successfully maintaining the illumination for 53 s.","PeriodicalId":19035,"journal":{"name":"Nanotechnology","volume":" ","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142470515","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}

引用次数: 0

In situRaman investigation to electrochemical synthesis of ammonia on Pd nanocrystals. 在钯纳米晶体上电化学合成氨的原位拉曼研究。

IF 2.9 4区材料科学

Nanotechnology Pub Date : 2024-11-04 DOI: 10.1088/1361-6528/ad8164

Xiaoxia Bai, Jingying Luo, Keming Wu, Congcong Sun, Haili Pang, Hui Zhang, Ajit Khosla

引用次数: 0

Application of NiS modified WS₂/TiO₂heterostructure in photocathodic protection. NiS 修饰的 WS2/TiO2 异质结构在光阴极保护中的应用。

IF 2.9 4区材料科学

Nanotechnology Pub Date : 2024-11-04 DOI: 10.1088/1361-6528/ad8b53

Hanbing Wu, Zhiming Bai, Hongmei Cheng, Zhengqing Zhou, Zhibo Zhang

{"title":"Application of NiS modified WS2/TiO2heterostructure in photocathodic protection.","authors":"Hanbing Wu, Zhiming Bai, Hongmei Cheng, Zhengqing Zhou, Zhibo Zhang","doi":"10.1088/1361-6528/ad8b53","DOIUrl":"10.1088/1361-6528/ad8b53","url":null,"abstract":"Stainless steel, as a popular corrosion resistant material, is still vulnerable to pitting corrosion in the marine environment. Therefore, in order to ensure the safety of stainless steel in the marine environment, it is necessary to implement corresponding protective measures. Titanium dioxide (TiO2), as an N-type semiconductor with excellent photoelectric properties, is widely used in the field of cathodic protection. However, as a photogenerated cathodic corrosion protection material, TiO2has the disadvantages of low conductivity and high carrier recombination rate. Therefore, WS2and NIS were introduced in this paper to modify it. TiO2/WS2/NiS (TWN) composites with Type-Ⅱ heterojunction structure were prepared by hydrothermal method and titration method. The results reveal TWN5 showed the best photoelectrochemical (PEC) performance, and the photocurrent density was 69% higher than that of a pure TiO2photoanode, and the photochemical and photocathodic protection performance was significantly better than that of pure TiO2. Under simulated ocean conditions, the self-corrosion potential of 304ss combined with TW5 and TWN5 photoanodes is reduced to -0.64 V and -0.7 V, respectively. The main reason is that the contact surfaces of WS2and TiO2formed a Type II heterostructure, which accelerates the separation and diffusion processes of photoinduced carriers. In addition, the plasmon resonance effect of NiS improves the ability to absorb visible light, and the metallic-like feature of NiS also promotes charge separation.","PeriodicalId":19035,"journal":{"name":"Nanotechnology","volume":" ","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142504568","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}

引用次数: 0

Exploring nonlinear correlations among transition metal nanocluster properties using deep learning: a comparative analysis with LOO-CV method and cosine similarity. 利用深度学习探索过渡金属纳米簇特性之间的非线性相关性：与 LOO-CV 方法和余弦相似性的比较分析。

IF 2.9 4区材料科学

Nanotechnology Pub Date : 2024-11-04 DOI: 10.1088/1361-6528/ad892c

Zahra Nasiri Mahd, Alireza Kokabi, Maryam Fallahzadeh, Zohreh Naghibi

{"title":"Exploring nonlinear correlations among transition metal nanocluster properties using deep learning: a comparative analysis with LOO-CV method and cosine similarity.","authors":"Zahra Nasiri Mahd, Alireza Kokabi, Maryam Fallahzadeh, Zohreh Naghibi","doi":"10.1088/1361-6528/ad892c","DOIUrl":"10.1088/1361-6528/ad892c","url":null,"abstract":"A novel approach is introduced for the rapid and accurate correlation analysis of nonlinear properties in Transition Metal (TM) clusters utilizing the Deep Leave-One-Out Cross-Validation technique. This investigation demonstrates that the Deep Neural Network (DNN)-based approach offers a more efficient predictive method for various properties of fourth-row TM nanoclusters compared to conventional Density Functional Theory methods, which are computationally intensive and time-consuming. The feature space, also known as descriptors, is established based on a broad spectrum of electronic and physical characteristics. Leveraging the similarities among these clusters, the DNN-based model is employed to explore the correlations among TM cluster properties. The proposed method, in conjunction with cosine similarity, achieves remarkable accuracy up to 10-9 for predicting total energy, lowest vibrational mode, binding energy, and HOMO-LUMO energy gap of TM2, TM3, and TM4nanoclusters. By analyzing correlation errors, the most closely coupled TM clusters are identified. Notably, Mn and Ni clusters exhibit the highest and lowest levels of energy coupling with other TMs, respectively. Generally, energy prediction for TM2, TM3, and TM4clusters exhibit similar trends, while an alternating behavior is observed for vibrational modes and binding energies. Furthermore, Ti, V, and Co demonstrate the highest binding energy correlations with TM2, TM3, and TM4sets, respectively. Regarding energy gap predictions, Ni exhibits the strongest correlation in the smallest TM2clusters, while Cr shows the highest dependence in TM3and TM4sets. Lastly, Zn displays the largest error in HOMO-LUMO energy gap across all sets, indicating distinctive independent energy gap characteristics.","PeriodicalId":19035,"journal":{"name":"Nanotechnology","volume":" ","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142470510","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}

引用次数: 0

Quantitative evaluation of residual resist in electron beam lithography based on scanning electron microscopy imaging and thresholding segmentation algorithm. 基于扫描电子显微镜成像和阈值分割算法的电子束光刻残留抗蚀剂定量评估。

IF 2.9 4区材料科学

Nanotechnology Pub Date : 2024-11-01 DOI: 10.1088/1361-6528/ad8a6a

Qingyuan Mao, Jingyuan Zhu, Zhanshan Wang

{"title":"Quantitative evaluation of residual resist in electron beam lithography based on scanning electron microscopy imaging and thresholding segmentation algorithm.","authors":"Qingyuan Mao, Jingyuan Zhu, Zhanshan Wang","doi":"10.1088/1361-6528/ad8a6a","DOIUrl":"10.1088/1361-6528/ad8a6a","url":null,"abstract":"Electron beam lithography is a critical technology for achieving high-precision nanoscale patterning. The presence of resist residues in the structures can significantly affect subsequent processes such as etching and lift-off. However, the evaluation and optimization of resist residues currently relies on qualitative observations like scanning electron microscopy (SEM), necessitating multiple experiments to iteratively optimize exposure parameters, which is not only labor-intensive but also costly. Here, we propose a quantitative method to evaluate resist residues. By processing the obtained SEM images using a threshold segmentation algorithm, we segmented the resist structure region and the residual resist region in the images. The grayscale values of these two regions are identified, and the residues are quantified based on the ratio of these values. Furthermore, a relationship curve between the residue amount and the exposure dose is plotted to predict the optimal exposure dose. To validate this method, we fabricated hydrogen silsesquioxane annular grating structures with 30 nm linewidth and analyzed the residue levels over an exposure dose range of 2000-2500μC cm-2, predicting the optimal dose to be 1800μC cm-2and confirming this through experiments. Additionally, we applied the method to polymethyl methacrylate and ZEP-520A structures, achieving similarly accurate results, further confirming the method's general applicability. This method has the potential to reduce experimental costs and improve yield and production efficiency in nano fabrication.","PeriodicalId":19035,"journal":{"name":"Nanotechnology","volume":" ","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142504569","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}

引用次数: 0

Effect of hydrogen sulfide concentration on two-dimensional SnS₂film by atomic layer deposition in annealing process. 退火过程中原子层沉积硫化氢浓度对二维 SnS2 薄膜的影响

IF 2.9 4区材料科学

Nanotechnology Pub Date : 2024-10-30 DOI: 10.1088/1361-6528/ad89b7

Heejun Yoon, Hyeongtag Jeon

{"title":"Effect of hydrogen sulfide concentration on two-dimensional SnS2film by atomic layer deposition in annealing process.","authors":"Heejun Yoon, Hyeongtag Jeon","doi":"10.1088/1361-6528/ad89b7","DOIUrl":"10.1088/1361-6528/ad89b7","url":null,"abstract":"Two-dimensional materials are widely studied due to its unique physical, optical, electrical properties, and good compatibility with various synthesis methods. And among the many fabrication methods, tin disulfide (SnS2) material, a two-dimensional (2D) material that can be achieved with accurate thickness control using atomic layer deposition (ALD), high uniformity and conformality even at low process temperatures is attracting attention. However, since the crystallinity of the thin film is low at a low process temperature, various post-annealing methods are being studied to compensate for film quality. In this work, we compared the crystal structures, chemical binding energies, and electrical properties of the thin films by post-annealing SnS2thin films according to the hydrogen sulfide concentrations of 4.00% and 99.99% in the hydrogen sulfide atmospheres. The crystallinity, grain size, and carrier concentrations of the SnS2thin film were the highest at a post-annealing temperature of 350 °C at a hydrogen sulfide concentration of 99.99%, and the chemical binding energies also corresponded with the standard Sn4+states, forming a pure 2D-hexagonal SnS2phase. In addition, SnS2thin films deposited via ALD showed high uniformity and conformality in large-scale wafers and trench structure wafers.","PeriodicalId":19035,"journal":{"name":"Nanotechnology","volume":" ","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142470509","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}

引用次数: 0

MOF-derived three-dimensional porous dodecahedral structured bimetallic Mn/Co-C-N composite for high-performance durable oxygen reduction reaction electrocatalysts. MOF衍生的三维多孔十二面体结构双金属Mn/Co-C-N复合材料用于高性能耐久性氧还原反应电催化剂。

IF 2.9 4区材料科学

Nanotechnology Pub Date : 2024-10-29 DOI: 10.1088/1361-6528/ad8929

Yelin Qiao, Yuanyuan Guo, Yueqi Zhao, Caiyun Chang, Shuo Wang, Xiaoting Zhang, Faming Gao, Rongna Chen, Li Hou

{"title":"MOF-derived three-dimensional porous dodecahedral structured bimetallic Mn/Co-C-N composite for high-performance durable oxygen reduction reaction electrocatalysts.","authors":"Yelin Qiao, Yuanyuan Guo, Yueqi Zhao, Caiyun Chang, Shuo Wang, Xiaoting Zhang, Faming Gao, Rongna Chen, Li Hou","doi":"10.1088/1361-6528/ad8929","DOIUrl":"10.1088/1361-6528/ad8929","url":null,"abstract":"Investigating high-efficiency oxygen reduction reaction (ORR) catalysts is one of the most effective methods for addressing the sluggish kinetics at the fuel cell cathode. Bimetallic three-dimensional porous materials have garnered significant attention due to their diverse structures, large specific surface area and synergistic catalytic effects. Herein, we synthesized a bimetallic three-dimensional porous dodecahedral structure, Mn/Co-C-N, derived from MOF using a straightforward approach. Experimental reults confirm that the strategic incorporation of Mn enhances the electrocatalytic activity for ORR. Meanwhile, the synergistic effects of Mn and Co, as well as the advantages of the dodecahedral structure for expediting electron transfer, all contribute to the exceptional ORR performance. Arc testing in an alkaline electrolyte reveals that the initial potential (Eonset) and the half-wave potential (E1/2) are 0.89 V and 0.80 V, closely approximating those of commercial Pt/C (20 wt%). Following 10 000 stability test cycles, the half-wave potential exhibits a mere 8 mV change, confirming its remarkable stability.","PeriodicalId":19035,"journal":{"name":"Nanotechnology","volume":" ","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142470514","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}

引用次数: 0

High thermoelectric performances of monolayer GeTe allotropes. 单层 GeTe 同素异形体的高热电性能。

IF 2.9 4区材料科学

Nanotechnology Pub Date : 2024-10-29 DOI: 10.1088/1361-6528/ad88e1

L J Gong, Q Z Han, J Yang, H L Shi, Y H Ren, Y H Zhao, H Yang, Q H Liu, Z T Jiang

{"title":"High thermoelectric performances of monolayer GeTe allotropes.","authors":"L J Gong, Q Z Han, J Yang, H L Shi, Y H Ren, Y H Zhao, H Yang, Q H Liu, Z T Jiang","doi":"10.1088/1361-6528/ad88e1","DOIUrl":"https://doi.org/10.1088/1361-6528/ad88e1","url":null,"abstract":"Aiming at finding wide-temperature-zone thermoelectric (TE) materials, five kinds of monolayer GeTe allotropes including the newly designedγ-,δ-, andɛ-GeTe monolayers and the usualα- andβ-GeTe ones are constructed. By using the density functional theory and the nonequilibrium Green's function method, all their electronic properties and TE transport properties are comparatively investigated. It is found that the room-temperature figure of meritZTof theγ-GeTe (ɛ-GeTe) along the armchair (zigzag) direction can amount to 4.5 (3.5), which is further increased to 7.15 (5.91) at 700 K. TheseZTvalues are much higher than the other IV-VI compounds usually withZT < 3, indicating that the armchairγ-GeTe and the zigzagɛ-GeTe we designed here can be used as superior wide-temperature-zone and high-performance TE materials in the temperature range from 300 K to 700 K. Moreover, with the increase of temperature, theZTpeaks will become wider in width and move towards the position of zero chemical potential, which will make the GeTe-based TE devices work at low bias voltages more efficiently. This work should be an important reference on the way to the stage ofZT⩾4, which will motivate more explorations into the high-performance TE materials working in a wider temperature scope.","PeriodicalId":19035,"journal":{"name":"Nanotechnology","volume":"36 3","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142522505","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}

引用次数: 0

Fabrication of a uniform quantum dot film with a high quantum yield. 制造具有高量子产率的均匀量子点薄膜。

IF 2.9 4区材料科学

Nanotechnology Pub Date : 2024-10-29 DOI: 10.1088/1361-6528/ad86c6

Min Woo Oh, Byung Hee Son, Jee Sang Yoon, Yonghwan Yoo, Yongduk Kim, Soo Bong Choi, Yeong Hwan Ahn, Won Bae Cho, Doo Jae Park

引用次数: 0