Nanotechnology最新文献_第8页

Analysis of coupling effect between TID and SET in SOI Tri-Gate nanowire field-effect transistors. SOI 三栅极纳米线场效应晶体管中 TID 与 SET 的耦合效应分析。

IF 2.9 4区材料科学

Nanotechnology Pub Date : 2024-10-04 DOI: 10.1088/1361-6528/ad7f63

Xilong Zhou, Chenyu Yin, Hongxia Liu, Shupeng Chen, Shulong Wang, Junjie Huang, Zhanpeng Yan, Chang Liu

引用次数: 0

Improving the coverage area and flake size of ReS₂through machine learning in APCVD. 在 APCVD 中通过机器学习改进 ReS2 的覆盖面积和薄片尺寸。

IF 2.9 4区材料科学

Nanotechnology Pub Date : 2024-10-04 DOI: 10.1088/1361-6528/ad7e2e

Mario Flores Salazar, Christian Mateo Frausto-Avila, Javier A de Jesús Bautista, Gowtham Polumati, Barbara A Muñiz Martínez, K Chandra Sekhar Reddy, Miguel Ángel Hernández-Vázquez, Elodie Strupiechonski, Parikshit Sahatiya, Mario Alan Quiroz-Juárez, Andres De Luna Bugallo

{"title":"Improving the coverage area and flake size of ReS2through machine learning in APCVD.","authors":"Mario Flores Salazar, Christian Mateo Frausto-Avila, Javier A de Jesús Bautista, Gowtham Polumati, Barbara A Muñiz Martínez, K Chandra Sekhar Reddy, Miguel Ángel Hernández-Vázquez, Elodie Strupiechonski, Parikshit Sahatiya, Mario Alan Quiroz-Juárez, Andres De Luna Bugallo","doi":"10.1088/1361-6528/ad7e2e","DOIUrl":"10.1088/1361-6528/ad7e2e","url":null,"abstract":"Machine learning is playing a crucial role in optimizing material synthesis, particularly in scenarios where several parameters related to growth exhibit different and significant outcomes. An example of such complexity is the growth of atomically thin semiconductors through chemical vapor deposition (CVD), where multiple parameters can influence the thermodynamics and reaction kinetics involved in the synthesis. Herein, we performed a set of orthogonal experiments, varying the key parameters such as temperature, carries gas flux and precursor position to identify the optimal conditions for maximizing covered area and the size of rhenium disulfide (ReS2) crystals. The experimental results were used to establish correlations among the three thermodynamic variables through an artificial neural network. Contour plots were then generated to visualize the impact on the coverage and flake size of the crystals. This study demonstrates the capability of machine learning to enhance the potential of CVD-growth for the integration of 2D semiconductors like ReS2at larger scales.","PeriodicalId":19035,"journal":{"name":"Nanotechnology","volume":null,"pages":null},"PeriodicalIF":2.9,"publicationDate":"2024-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142308177","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

Structural and excitonic properties of the polycrystalline FAPbI₃thin films, and their photovoltaic responses. 多晶 FAPbI3 薄膜的结构和激子特性及其光电响应。

IF 2.9 4区材料科学

Nanotechnology Pub Date : 2024-10-04 DOI: 10.1088/1361-6528/ad7f5b

Yi-Chun Huang, I-Jane Yen, Chih-Hsien Tseng, Hui-Yu Wang, Anjali Chandel, Sheng Hsiung Chang

{"title":"Structural and excitonic properties of the polycrystalline FAPbI3thin films, and their photovoltaic responses.","authors":"Yi-Chun Huang, I-Jane Yen, Chih-Hsien Tseng, Hui-Yu Wang, Anjali Chandel, Sheng Hsiung Chang","doi":"10.1088/1361-6528/ad7f5b","DOIUrl":"10.1088/1361-6528/ad7f5b","url":null,"abstract":"Faormamadinium based perovskites have been proposed to replace the methylammonium lead tri-iodide (MAPbI3) perovskite as the light absorbing layer of photovoltaic cells owing to their photo-active and chemically stable properties. However, the crystal phase transition from the photo-activeα-FAPbI3to the non-perovksiteδ-FAPbI3still occurs in un-doped FAPbI3films owing to the existence of crack defects, which degrads the photovoltaic responses. To investigate the crack ratio (CR)-dependent structure and excitonic characteristics of the polycrystalline FAPbI3thin films deposited on the carboxylic acid functionalized ITO/glass substrates, various spectra and images were measured and analyzed, which can be utilized to make sense of the different devices responses of the resultant perovskite based photovoltaic cells. Our experimental results show that the there is a trade-off between the formations of surface defects and trapped iodide-mediated defects, thereby resulting in an optimal crack density or CR of the un-dopedα-FAPbI3active layer in the range from 4.86% to 9.27%. The decrease in the CR (tensile stress) results in the compressive lattice and thereby trapping the iodides near the PbI6octahedra in the bottom region of the FAPbI3perovskite films. When the CR of the FAPbI3film is 8.47%, the open-circuit voltage (short-circuit current density) of the resultant photovoltaic cells significantly increased from 0.773 V (16.62 mA cm-2) to 0.945 V (18.20 mA cm-2) after 3 d. Our findings help understanding the photovoltaic responses of the FAPbI3perovskite based photovoltaic cells on the different days.","PeriodicalId":19035,"journal":{"name":"Nanotechnology","volume":null,"pages":null},"PeriodicalIF":2.9,"publicationDate":"2024-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142350579","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

Characterization of identical lithium-ion battery electrodes before and after charge/discharge cycles via in-plane large-area polishing. 通过面内大面积抛光对充电/放电循环前后的相同锂离子电池电极进行表征。

IF 2.9 4区材料科学

Nanotechnology Pub Date : 2024-10-04 DOI: 10.1088/1361-6528/ad7f60

Mingi Cho, So Yeon Park, Heechul Jung, Seong Heon Kim

{"title":"Characterization of identical lithium-ion battery electrodes before and after charge/discharge cycles via in-plane large-area polishing.","authors":"Mingi Cho, So Yeon Park, Heechul Jung, Seong Heon Kim","doi":"10.1088/1361-6528/ad7f60","DOIUrl":"10.1088/1361-6528/ad7f60","url":null,"abstract":"As an effective method to fabricate a large-area cross-sectional sample for lithium-ion battery electrodes, we perform in-plane polishing of LiNi0.8Co0.15Al0.05O2(NCA) cathode samples and obtain a large cross-sectional area with a diameter of 1.5 mm. The polished cross-sections of NCA cathode particles are sufficiently flat to perform the atomic force microscopy (AFM) measurements on each cathode particle. Following AFM-based Kelvin probe force microscopy and scanning spreading resistance microscopy measurements, an identical in-plane polished NCA sample is assembled into a coin cell for the charge and discharge processes. After 90 charge/discharge cycles, the in-plane-polished sample is successfully disassembled from the coin cell without causing critical damage. In addition, a microcrack structure, which is a typical degradation feature of the cycles of NCA particles, is observed for the identical in-plane polished NCA sample. This indicates that the in-plane polishing method is effective for investigating identical NCA electrode samples before and after the charge/discharge process. Furthermore, the in-plane polishing method can be successfully applied to the large-area polishing of a Si-based anode which is a mixture of Si carbon complexes and graphite particles. This study presents a novel methodology for analyzing the degradation of lithium-ion battery electrode materials.","PeriodicalId":19035,"journal":{"name":"Nanotechnology","volume":null,"pages":null},"PeriodicalIF":2.9,"publicationDate":"2024-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142350569","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

A review on recent advances in g-C₃N₄-MXene nanocomposites for photocatalytic applications. 光催化应用 g-C3N4-MXene 纳米复合材料的最新进展综述。

IF 2.9 4区材料科学

Nanotechnology Pub Date : 2024-10-04 DOI: 10.1088/1361-6528/ad7e2f

N Subha, Lakshmana Reddy Nagappagari, A Ravi Sankar

{"title":"A review on recent advances in g-C3N4-MXene nanocomposites for photocatalytic applications.","authors":"N Subha, Lakshmana Reddy Nagappagari, A Ravi Sankar","doi":"10.1088/1361-6528/ad7e2f","DOIUrl":"10.1088/1361-6528/ad7e2f","url":null,"abstract":"The solutions for environmental remediation and renewable energy generation have intensified the exploration of efficient photocatalytic materials. Recently, the composites of g-C3N4and MXene have gained considerable interest for their potential applications in photocatalysis. In the g-C3N4-MXene composite, the g-C3N4possesses unique physical, chemical, and optical properties to increase visible light absorption. At the same time, MXene improves conductivity, adsorption of reactant molecules or the active sites, and charge transfer properties. Combining the unique physico-chemical properties of MXene and g-C3N4, the resulting composite exhibits superior photo-responsive behavior and is critical in photocatalytic reactions. Furthermore, the g-C3N4-MXene composite exhibits stability and recyclability, making it a promising candidate for sustainable and scalable photocatalytic material in environmental remediation. This review offers an in-depth analysis of the development and design of g-C3N4-MXene composites through diverse synthesis procedures and a comprehensive analysis of their application in carbon dioxide (CO2) reduction, photocatalytic degradation, water splitting processes, mainly hydrogen (H2) generation, H2O2production, N2fixation, and NOxremoval. The charge transfer mechanism of g-C3N4-MXene composite for photocatalytic application has also been discussed. This review provides insights into the photocatalytic capabilities of g-C3N4-MXene composites, showing their potential to address current environmental challenges and establish a robust foundation for sustainable energy conversion technologies.","PeriodicalId":19035,"journal":{"name":"Nanotechnology","volume":null,"pages":null},"PeriodicalIF":2.9,"publicationDate":"2024-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142308175","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

Coherent random fiber laser emission from CdSe/ZnS quantum dots. CdSe/ZnS 量子点的相干随机光纤激光发射。

IF 2.9 4区材料科学

Nanotechnology Pub Date : 2024-10-04 DOI: 10.1088/1361-6528/ad7e33

Lihua Ye, Zhixiang Cheng, Ziang Zhang, Shaoqiang Hong, Qing Zhao

引用次数: 0

Recent advances in scanning electrochemical microscopy for energy applications. 用于能源应用的扫描电化学显微镜的最新进展。

IF 2.9 4区材料科学

Nanotechnology Pub Date : 2024-10-04 DOI: 10.1088/1361-6528/ad7e30

Qi Wang, Qianlin Tang, Peipei Li, Xiaoxia Bai

{"title":"Recent advances in scanning electrochemical microscopy for energy applications.","authors":"Qi Wang, Qianlin Tang, Peipei Li, Xiaoxia Bai","doi":"10.1088/1361-6528/ad7e30","DOIUrl":"10.1088/1361-6528/ad7e30","url":null,"abstract":"Scanning electrochemical microscopy (SECM) is a scanning probe technique capable of imaging substrate topography and measuring the local electrochemical reactivity of interfaces. Since introduced by Allen J. Bard and co-workers in 1989, it has expanded into a wide variety of fields, such as nanomaterial characterization, energy, kinetics, electrocatalysis, metal anti-corrosion, biology and instrumental development. SECM uses an ultra-microelectrode as the probe to record redox current during probe scanning across sample surfaces to obtain local topography and electrochemical reactivity of samples. Specifically, three main topics are reviewed and discussed: (1) the working principles and operating modes of SECM; (2) the recent developments in the application of SECM in energy science, including solar cell, rechargeable batteries, fuel cells and supercapacitors, with an emphasis on the last five years (2019-2023); (3) the perspectives and outlook of SECM in various energy devices. We anticipate that a wider adoption of SECM by the energy community will allow for the operando characterization of many types of reactions, and hold the potential to provide new insights into the structure/activity and composition/activity relationships.","PeriodicalId":19035,"journal":{"name":"Nanotechnology","volume":null,"pages":null},"PeriodicalIF":2.9,"publicationDate":"2024-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142308179","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

Fe(OH)3/Ti3C2Tx nanocomposites for enhanced ammonia gas sensor at room temperature. 用于室温下增强型氨气传感器的 Fe(OH)3/Ti3C2Tx 纳米复合材料。

IF 2.9 4区材料科学

Nanotechnology Pub Date : 2024-10-03 DOI: 10.1088/1361-6528/ad82f3

Zhihua Zhao, Hepeng Zhang, Pu Chen, Guixin Jin, Lan Wu

{"title":"Fe(OH)3/Ti3C2Tx nanocomposites for enhanced ammonia gas sensor at room temperature.","authors":"Zhihua Zhao, Hepeng Zhang, Pu Chen, Guixin Jin, Lan Wu","doi":"10.1088/1361-6528/ad82f3","DOIUrl":"https://doi.org/10.1088/1361-6528/ad82f3","url":null,"abstract":"Two-dimensional material (2D material) MXene has great application potential in gas sensors because of its excellent controllable performance and vast specific surface area. In this study, we used a straightforward in-situ electrostatic self-assembly technique to create Fe(OH)3/Ti3C2Tx nanocomposites, which were then used to fabricate gas sensors for ammonia detection at room temperature (25 ℃). Several characterization methods were performed aimed at determining the surface appearance and construction of the nanocomposites, and the sensing characteristics and mechanism were also systematically examined. The findings demonstrate the effective incorporation of amorphous Fe(OH)3 nanoparticles on the surface of Ti3C2Tx. Additionally the nanocomposites of Fe(OH)3/Ti3C2Tx have considerably higher specific surface area than pure Ti3C2Tx, hence offering more active NH3 adsorption sites. The response of the sensor to 100 ppm NH3 was 48.6% at room temperature, which was 9.3 times more higher than that of pure Ti3C2Tx. The sensors also have the advantages of long-term stability (33 days), low NH3 detection limit (500 ppb), and rapid recovery time (85 s) and response times (78 s). It is anticipated that this work will be helpful for developing the new generation of wearable ammonia sensors at room temperature.","PeriodicalId":19035,"journal":{"name":"Nanotechnology","volume":null,"pages":null},"PeriodicalIF":2.9,"publicationDate":"2024-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142372364","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

Doxorubicin-loaded methoxy-intercalated kaolinite as a repackaging of doxorubicin for an enhanced breast cancer treatment: in vitro and in vivo investigation. 装载多柔比星的甲氧基夹杂高岭石作为多柔比星的再包装，用于增强乳腺癌治疗：体外和体内研究。

IF 2.9 4区材料科学

Nanotechnology Pub Date : 2024-10-02 DOI: 10.1088/1361-6528/ad823f

Fatma Al-Zahraa Sayed, Ayman S Mohamed, Heba Mohamed Fahmy

{"title":"Doxorubicin-loaded methoxy-intercalated kaolinite as a repackaging of doxorubicin for an enhanced breast cancer treatment: in vitro and in vivo investigation.","authors":"Fatma Al-Zahraa Sayed, Ayman S Mohamed, Heba Mohamed Fahmy","doi":"10.1088/1361-6528/ad823f","DOIUrl":"https://doi.org/10.1088/1361-6528/ad823f","url":null,"abstract":"Doxorubicin is one of the most common wide-spectrum chemotherapeutics. However, its efficacy is limited due to off-target accumulation and selectivity issues. In this study, we compared the anti-cancer effect and biocompatibility of KaoliniteMeOH-Dox, a doxorubicin repackaging, to doxorubicin monotherapy. The formulation was extensively tested using transmission electron microscopy, dynamic light scattering, zeta potential, Fourier transform infrared, x-ray diffraction, and in vitro drug release. The MTT assay measured MCF-7 cell growth inhibition in vitro. In vivo testing involved 20 naïve mice and 40 Ehrlich solid tumor-inoculated mice. The tumor size was monitored for 18 days. In all experimental groups, tumor and cardiac tissues were evaluated for cytotoxicity and genotoxicity by addressing oxidative stress, histopathology, and comet assay. We found that kaoliniteMeOH-Dox has many advantages in terms of size, charge, shape, high loading efficiency (90.16%), and pH-dependent release. The MTT assay showed that the formulation outperformed doxorubicin in growth inhibition and selectivity. In vivo, research showed that kaoliniteMeOH-Dox suppressed tumors by 86.075% compared to 60.379% for free doxorubicin. Histological analysis showed that kaoliniteMeOH-Dox reduced tumor size, metastasis, and carcinogenic oxidative stress and inflammation in mice without harming naive mice. Based on the obtained data, the kaoliniteMeOH-Dox formulation holds promise for breast cancer treatment and warrants further investigation.","PeriodicalId":19035,"journal":{"name":"Nanotechnology","volume":null,"pages":null},"PeriodicalIF":2.9,"publicationDate":"2024-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142365881","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

Clustered ultra-small iron oxide nanoparticles as potential T₁/T₂dual-modal magnetic resonance imaging contrast agents and application to tumor model. 簇状超小氧化铁纳米粒子作为潜在的 T1/T2 双模态磁共振成像造影剂及在肿瘤模型中的应用。

IF 2.9 4区材料科学

Nanotechnology Pub Date : 2024-10-01 DOI: 10.1088/1361-6528/ad8203

Ying Liu, Son Long Ho, Tirusew Tegafaw, Dejun Zhao, Mohammad Yaseen Ahmad, Abdullah Khamis Ali Al Saidi, Hyunsil Cha, Sangyeol Lee, Hansol Lee, Seungho Kim, Mun Han, Kwon Seok Chae, Yongmin Chang, Gang Ho Lee

{"title":"Clustered ultra-small iron oxide nanoparticles as potential T1/T2dual-modal magnetic resonance imaging contrast agents and application to tumor model.","authors":"Ying Liu, Son Long Ho, Tirusew Tegafaw, Dejun Zhao, Mohammad Yaseen Ahmad, Abdullah Khamis Ali Al Saidi, Hyunsil Cha, Sangyeol Lee, Hansol Lee, Seungho Kim, Mun Han, Kwon Seok Chae, Yongmin Chang, Gang Ho Lee","doi":"10.1088/1361-6528/ad8203","DOIUrl":"https://doi.org/10.1088/1361-6528/ad8203","url":null,"abstract":"Many studies have been conducted on the use of ultra-small iron oxide nanoparticles (USIONs) (d < 3 nm) as potential positive magnetic resonance imaging (MRI)-contrast agents (CAs); however, there is dearth of research on clustered USIONs. In this study, nearly monodispersed clustered USIONs were synthesized using a simple two-step one-pot polyol method. First, USIONs (d = 2.7 nm) were synthesized, and clustered USIONs (d = 27.9 nm) were subsequently synthesized through multiple cross-linking of USIONs with poly(acrylic acid-co-maleic acid) (PAAMA) polymers with many -COOH groups. The clustered PAAMA-USIONs exhibited very weak ferromagnetism owing to the magnetic interaction between superparamagnetic USIONs; this was evidenced by their appreciable r1= 3.9 s‒1mM‒1and high r2/r1ratio of 14.6. Their ability to function as a dual-modal T1/T2MRI-CA in T1-weighted MRI was demonstrated when they simultaneously exhibited positive and negative contrasts in T1-weighted MRI of tumor model mice after intravenous injection. They displayed positive contrasts at the kidneys, bladder, heart, and aorta and negative contrasts at the liver and tumor.&#xD.","PeriodicalId":19035,"journal":{"name":"Nanotechnology","volume":null,"pages":null},"PeriodicalIF":2.9,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142365879","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