Nanoscale最新文献_第7页

Graphene Oxide/Niobium Carbide MXene Composite-Based Functional Nanocomposite Scaffold for Artificial Cornea 基于氧化石墨烯/碳化铌MXene复合材料的人工角膜功能纳米复合支架

IF 6.7 3区材料科学

Nanoscale Pub Date : 2025-06-24 DOI: 10.1039/d5nr01312g

Li Peng, Wei Ma, Liwei Zhang, Siming Liu, Kai Han, Baihua Chen

{"title":"Graphene Oxide/Niobium Carbide MXene Composite-Based Functional Nanocomposite Scaffold for Artificial Cornea","authors":"Li Peng, Wei Ma, Liwei Zhang, Siming Liu, Kai Han, Baihua Chen","doi":"10.1039/d5nr01312g","DOIUrl":"https://doi.org/10.1039/d5nr01312g","url":null,"abstract":"Artificial cornea offers the only hope to end-stage cornea disease patient. A highly desirable artificial cornea requires high mechanical strength, good biocompatibility, sufficient durability to withstand hostile environment and possesses specific biological activities. This study reports the physical characteristics, cytocompatibility, and biocompatibility of nanocomposite by graphene oxide and niobium carbide MXene (GO/Nb2C) used in normal rabbit cornea and corneal alkali burn model. Nanoindentation and long-term corrosion assay in combination with atomic force and scanning electron microscopy were used to study mechanical properties and corrosion resistance. In vitro biocompatibility was evaluated based on the survival, proliferation, and attachment of human corneal stromal cells. In vivo stability and host tissue responses were conducted using GO/Nb2C scaffolds implanted inside rabbit corneas and in a vivo corneal alkali burn model. Fibrosis index Hsp47, FN, and a-SMA were negative. Furthermore, IL-2 and IL-6 were downregulated, along with oxidative stress indices in the rabbit cornea after implanting GO/Nb2C scaffolds. In vivo corneal alkali burns model, IF indicated GO/ Nb2C scaffolds decreased CD11b expression around surgical area. The GO/Nb2C scaffolds have significantly high biocompatibility with biological activity, safety, efficacy, antioxidative stress, and anti-inflammatory property. This promising bioactivity corneal scaffold provides new ideas for constructing a functional scaffold of artificial cornea.","PeriodicalId":92,"journal":{"name":"Nanoscale","volume":"21 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144479650","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Nanometrology assisted chemical fabrication: direct laser writing of porphyrins onto complex surfaces. 纳米计量辅助化学制造：直接激光在复杂表面上书写卟啉。

IF 6.7 3区材料科学

Nanoscale Pub Date : 2025-06-24 DOI: 10.1039/d5nr00765h

Baptiste Maillot, Haroon Rashid, Roxanne Bercy, Jean Frédéric Audibert, Manuel J. Llansola-Portoles, Isabelle LERAY, Fabien Miomandre, Vitor Brasiliense

{"title":"Nanometrology assisted chemical fabrication: direct laser writing of porphyrins onto complex surfaces.","authors":"Baptiste Maillot, Haroon Rashid, Roxanne Bercy, Jean Frédéric Audibert, Manuel J. Llansola-Portoles, Isabelle LERAY, Fabien Miomandre, Vitor Brasiliense","doi":"10.1039/d5nr00765h","DOIUrl":"https://doi.org/10.1039/d5nr00765h","url":null,"abstract":"The association of operando monitoring methodologies with micro and nanoscale surface modification strategies has recently been shown to enable the preparation of complex yet highly precise organic functional surfaces. While promissing, such demonstrations have so far been limited to model systems, consisting on minimally functionalized aryl radicals. With a growing demand for more sophisticated surfaces, bearing multiple functions, a demonstration of the generality of the strategy to chemically complex moieties and surfaces is deeply needed. In this work, we aim to fill this gap by preparing tetraphenyl porphyrin derivatives modified to become radical precursors that can be activated with light. Operando optical monitoring is used to non-invasively analyze their grafting behavior in different conditions, optimizing the routes to enable modification of inert glass surfaces with high precision (30 atto L). We demonstrate that the methodology is compatible with direct laser writing technologies, and use it to prepare photophysically active surfaces with high resolution. We demonstrate that the instrinsic emissive properties of Tetraphenylporphyrin derivatives are well preserved, and that several surface modifing steps can be sequentially stacked, leading to the preparation of surfaces with mulitple functions. By controlling the microscale distribution of chemical groups with different photophysical properties, we demonstrate that complex chemical designs can be readily and reliably implemented. This work therefore shows that light activated radical pathways can be broadly used to modify surfaces, opening interesting new perspectives for the implementation of functional materials.","PeriodicalId":92,"journal":{"name":"Nanoscale","volume":"636 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144370819","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Nanoscale Chemical Characterization of Functionalized Graphene by Heterodyne AFM-IR and Chemical Force Microscopy 外差AFM-IR和化学力显微镜表征功能化石墨烯的纳米尺度化学性质

IF 6.7 3区材料科学

Nanoscale Pub Date : 2025-06-24 DOI: 10.1039/d5nr01862e

Reiji Kumagai, Mariko Takahashi, Nozomu Suzuki, Kenji Hirai, Hirohmi Watanabe, Hiroshi Uji-i, Yasuhiko Fujita

{"title":"Nanoscale Chemical Characterization of Functionalized Graphene by Heterodyne AFM-IR and Chemical Force Microscopy","authors":"Reiji Kumagai, Mariko Takahashi, Nozomu Suzuki, Kenji Hirai, Hirohmi Watanabe, Hiroshi Uji-i, Yasuhiko Fujita","doi":"10.1039/d5nr01862e","DOIUrl":"https://doi.org/10.1039/d5nr01862e","url":null,"abstract":"Nanoscale analysis is of critical importance for understanding and engineering the functional properties of advanced materials, particularly in applications requiring precise control of surface chemistry. In this work, we present a powerful strategy to probe the nanoscale heterogeneity of chemical functional species on graphene by combining heterodyne AFM-based infrared (AFM-IR) microscopy and chemical force microscopy (CFM). AFM-IR provides nanoscale-resolved chemical fingerprint information, enabling direct characterization of surface functional species, while complementary CFM reveals specific surface chemical interaction at the nanoscale with surface morphology. This combined approach successfully visualizes the nanoscale heterogeneity of chemical functional species on graphene introduced by a liquid-phase photoinduced covalent modification (PICM) method. Specifically, our results reveal that oxidative functional groups such as carboxyl, hydroxyl, and epoxide groups are relatively uniformly distributed across the PICM-modified regions. In contrast, methoxy groups form nanosized domains concentrated at the center of the PICM regions. This study represents the first successful molecular fingerprint visualization of nanoscale heterogeneity in functional groups introduced on graphene surfaces. As this method is fundamentally applicable to a wide range of sample systems—including other 2D atomic layer materials, polymers, and biological samples—, our work provides significant implications for both basic science and industrial applications.","PeriodicalId":92,"journal":{"name":"Nanoscale","volume":"32 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144370820","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Impacts of Localized Charge Accumulation on Photocurrent Dynamics in Metal-MoS2 Contacts 局部电荷积累对金属- mos2触点光电流动力学的影响

IF 6.7 3区材料科学

Nanoscale Pub Date : 2025-06-24 DOI: 10.1039/d4nr04610b

Deogkyu Choi, Seungho Bang, Juchan Lee, Chaewon Lee, jieun Jo, Young Joo Yu, Chan Kwon, Hayoung Ko, Ki Kang Kim, Jin Ho Ahn, Eun Kyu Kim, Mun Seok Jeong

{"title":"Impacts of Localized Charge Accumulation on Photocurrent Dynamics in Metal-MoS2 Contacts","authors":"Deogkyu Choi, Seungho Bang, Juchan Lee, Chaewon Lee, jieun Jo, Young Joo Yu, Chan Kwon, Hayoung Ko, Ki Kang Kim, Jin Ho Ahn, Eun Kyu Kim, Mun Seok Jeong","doi":"10.1039/d4nr04610b","DOIUrl":"https://doi.org/10.1039/d4nr04610b","url":null,"abstract":"Monolayer molybdenum disulfide (1L-MoS2) has attracted a lot of attention due to its excellent electrical and optoelectronic properties. However, the challenge remains the instability of the metal-semiconductor junction, which greatly affects the performance of the drain/source contacts. Despite the promising potential offered by 1L-MoS2 as an ultrathin two-dimensional semiconductor, its optoelectronic performance is often compromised by contact issues at the metal-semiconductor junctions. Especially, the localized charge accumulation (LCA) can cause barrier height fluctuation, which affects carrier transport and activated trap states. In this study, we use photocurrent mapping to investigate photocurrent reduction and its optoelectronic properties depending on device position. The results show a significant reduction in the photoresponsivity and photodetectivity of the LCA region compared to the channel. Moreover, the decay time of the LCA region was approximately twice as long compared to the channel, indicating the presence of deep traps leading to slow switching. This investigation highlights the significant role of photo-generated LCA region affecting metal-semiconductor junctions in degrading optoelectronics performance. It also provides a critical understanding necessary for engineering next-generation optoelectronics based on 2D semiconductors.","PeriodicalId":92,"journal":{"name":"Nanoscale","volume":"17 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144370904","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Efficient photochemical production of H2O2 on carbon nitride photocatalysts with optimized multi-synergistic effect of enhanced visible-light absorption, charge separation, and surface kinetics 在氮化碳光催化剂上高效光化学生产H2O2，增强可见光吸收、电荷分离和表面动力学的优化多重协同效应

IF 6.7 3区材料科学

Nanoscale Pub Date : 2025-06-23 DOI: 10.1039/d5nr01427a

Jiaqiao Hu, Xing Wang, Xingang Kong, Shinobu Uemura, Takafumi Kusunose, Yasuhiro Tanaka, Qi Feng

{"title":"Efficient photochemical production of H2O2 on carbon nitride photocatalysts with optimized multi-synergistic effect of enhanced visible-light absorption, charge separation, and surface kinetics","authors":"Jiaqiao Hu, Xing Wang, Xingang Kong, Shinobu Uemura, Takafumi Kusunose, Yasuhiro Tanaka, Qi Feng","doi":"10.1039/d5nr01427a","DOIUrl":"https://doi.org/10.1039/d5nr01427a","url":null,"abstract":"Photochemical production of hydrogen peroxide (H2O2) using visible-light response photocatalysts offers a sustainable green strategy. In this study, the g-C3N4-based (CN) photocatalysts for the photochemical production of H2O2were facilely synthesized through multi-step calcination and alkali metal ion intercalation processes. The n-π* electronic transition was achieved by disrupting the symmetrical planar of the heptazine layers to enhance visible-light absorption. The alkali metal ion intercalations greatly enhanced photocatalytic activities of CN by redshift in the π-π* electronic transitions in visible-light and introduction of cyano groups into the photocatalysts. In the alkali metal ion intercalated photocatalysts, the K+-intercalated photocatalyst demonstrates the greatest photocatalytic efficiency because of its effective introduction of cyano groups into the CN structure, which enhances the kinetics of O2 reduction reaction on the photocatalyst surface by reducing the interfacial charge-transfer resistance. A gradient energy band structure was introduced into the photocatalyst by a gradient K+-doping, which improved the charge separation efficiency. The photocatalyst with the optimized multi-synergistic effect of improved visible-light absorption, charge separation, and surface kinetics achieved a H2O2 production rate of 2720 µM/h under simulated sunlight, which is 64 times higher than that of the photocatalyst prepared by traditional thermal decomposition process. This study offers a straightforward approach to designing of high-efficiency CN photocatalysts for the photochemical H2O2 production.","PeriodicalId":92,"journal":{"name":"Nanoscale","volume":"50 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144341326","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Recent progress in outermost surface engineering for solar panels 太阳能电池板外表面工程的最新进展

IF 6.7 3区材料科学

Nanoscale Pub Date : 2025-06-23 DOI: 10.1039/d5nr00621j

Yicai Wang, Junhui He

引用次数: 0

A smart nanocomposite system for controlled insulin release and glucose sensing in diabetes management 一种在糖尿病管理中控制胰岛素释放和葡萄糖传感的智能纳米复合系统

IF 6.7 3区材料科学

Nanoscale Pub Date : 2025-06-23 DOI: 10.1039/d5nr01437a

Dan Wang, Yaoyao Wang, Wilson Dumisani Gamuchirai Dube, Jiarong Zhang, Jie Gao, Xue Tang, Gisèle Ineza Urujeni, Yajie Zhang, Linjie Zhao, Hua He, Deli Xiao, Pierre Dramou

{"title":"A smart nanocomposite system for controlled insulin release and glucose sensing in diabetes management","authors":"Dan Wang, Yaoyao Wang, Wilson Dumisani Gamuchirai Dube, Jiarong Zhang, Jie Gao, Xue Tang, Gisèle Ineza Urujeni, Yajie Zhang, Linjie Zhao, Hua He, Deli Xiao, Pierre Dramou","doi":"10.1039/d5nr01437a","DOIUrl":"https://doi.org/10.1039/d5nr01437a","url":null,"abstract":"Diabetes is a global health challenge, driving the need for novel solutions in glucose monitoring and insulin delivery. Here, we present a next-generation glucose-responsive nanocomposite, ZIF-8@Ins-GOx/AuNCs, designed for simultaneous controlled insulin release and real-time glucose sensing. This dual-functional system synergistically integrates zeolite imidazolate framework-8 (ZIF-8), glucose oxidase (GOx), and gold nanoclusters (AuNCs), creating a highly efficient platform for personalized diabetes management. The nanocomposite exhibits an impressive glucose detection range (2.50–200 mM) with high sensitivity (LOD = 0.80 mM), offering unprecedented accuracy for early diagnosis and monitoring. In addition, it demonstrates a glucose-triggered insulin release profile with exceptional encapsulation efficiency (90%) and sustained release under hyperglycemic conditions. Comprehensive in vitro studies reveal excellent biocompatibility, with cell viability greater than 80% at concentrations up to 22.2 mM, highlighting the safety for potential clinical use. This work represents a significant leap forward in the development of adaptive drug delivery systems, offering a versatile, scalable platform with the potential to revolutionize not only diabetes treatment but also broader biomedical applications demanding precise, self-regulated therapeutic interventions.","PeriodicalId":92,"journal":{"name":"Nanoscale","volume":"269 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144341325","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Molecular additive-driven control of Cu/Cu₂O nanoparticle growth on mesoporous silica for enhanced photocatalytic hydrogen production 分子添加剂驱动的Cu/Cu₂O纳米颗粒在介孔二氧化硅上生长以增强光催化制氢

IF 6.7 3区材料科学

Nanoscale Pub Date : 2025-06-23 DOI: 10.1039/d5nr02191j

Santosh V Mohite, Artavazd Kirakosyan, Kwangchan An, Yeong Seok Shim, Jihoon Choi, Yeonho Kim

{"title":"Molecular additive-driven control of Cu/Cu₂O nanoparticle growth on mesoporous silica for enhanced photocatalytic hydrogen production","authors":"Santosh V Mohite, Artavazd Kirakosyan, Kwangchan An, Yeong Seok Shim, Jihoon Choi, Yeonho Kim","doi":"10.1039/d5nr02191j","DOIUrl":"https://doi.org/10.1039/d5nr02191j","url":null,"abstract":"Size-controlled cuprous oxide-based nanoparticles (NPs) are promising materials for enhancing visible-light-driven photocatalytic hydrogen production by increasing the number of Cu+ surface-active sites. This study investigates the role of molecular additives in the growth of Cu/Cu₂O NPs on mesoporous silica (m-SiO2) templates. The molecular additives, cetyltrimethylammonium bromide (CTAB), ascorbic acid (AA), and citric acid (CA) are analyzed for their ability to modify the zeta potential of m-SiO₂, facilitating the adsorption of Cu⁺ ions. The modified surface effectively controlled the interaction between Cu⁺ ions and the m-SiO₂ surface through the influence of molecular additives. The CTAB system facilitates a rapid nanoparticle (NP) growth rate and significant aggregation, thereby promoting Cu⁺ ion adsorption and subsequent larger NP formation. In contrast, CA provides better control over NPs formation, preventing aggregation through Cu²⁺ chelation and stabilizing it on the mesoporous voids of silica. Furthermore, the intensity ratio of metallic Cu to Cu₂O is the lowest value of 0.47 in the CA system, indicating a higher Cu₂O content compared to CTAB and AA systems. It was observed that the CTAB and AA systems are more favorable for the formation of metallic Cu in the NPs. As a result, the CA system achieves a 5-fold increase in hydrogen production rate under visible light compared to the CTAB system. These findings highlight the critical role of molecular additives in tailoring NPs growth and photocatalytic performance.","PeriodicalId":92,"journal":{"name":"Nanoscale","volume":"177 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144341330","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Advancing Electrocatalytic CO₂ Reduction: Key Strategies for Scaling Up to Industrial Applications 推进电催化二氧化碳减排：扩大工业应用的关键战略

IF 6.7 3区材料科学

Nanoscale Pub Date : 2025-06-23 DOI: 10.1039/d5nr01624j

Lei Wang, Yimin A. Wu

引用次数: 0

Rashba effect modulation in two-dimensional A2B2Te6 (A = Sb, Bi; B = Si, Ge) materials via charge transfer 二维A2B2Te6 （A = Sb, Bi）中的Rashba效应调制B = Si, Ge)材料通过电荷转移

IF 6.7 3区材料科学

Nanoscale Pub Date : 2025-06-23 DOI: 10.1039/d4nr04601c

Haipeng Wu, Qikun Tian, Jinghui Wei, Ziyu Xing, Guangzhao Qin, Zhenzhen Qin

{"title":"Rashba effect modulation in two-dimensional A2B2Te6 (A = Sb, Bi; B = Si, Ge) materials via charge transfer","authors":"Haipeng Wu, Qikun Tian, Jinghui Wei, Ziyu Xing, Guangzhao Qin, Zhenzhen Qin","doi":"10.1039/d4nr04601c","DOIUrl":"https://doi.org/10.1039/d4nr04601c","url":null,"abstract":"Designing two-dimensional (2D) Rashba semiconductors, exploring the underlying mechanism of Rashba effect, and further proposing efficient and controllable approaches are crucial for the development of spintronics. On the basis of first-principles calculations, we here theoretically design all possible types (typical, inverse, and composite) of Janus structures and successfully achieve numerous ideal 2D Rashba semiconductors from a series of five atomic-layer A2B2Te6 (A = Sb, Bi; B = Si, Ge)materials. Considering the different Rashba constant αR and its modulation trend under external electric field, we comprehensively analyze the intrinsic electric field Ein in terms of work function, electrostatic potential, dipole moment, and inner charge transfer. Inspired by the quantitative relationship between charge transfer and the strength of Ein and even the αR, we propose a straightforward strategy of introducing a single adatom onto the surface of 2D monolayer to introduce and modulate the Rashba effect. Lastly, we also examine the growth feasibility and electronic structures of the Janus Sb2Ge2Se3Te3 system and Janus-adsorbed systems on a 2D BN substrate. Our work not only conducts a detailed analysis of A2B2Te6-based Rashba systems, but also proposes a new strategy for efficiently and controllably modulating the αR through the reconfiguration of charge transfer.","PeriodicalId":92,"journal":{"name":"Nanoscale","volume":"101 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144370865","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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