Nanoscale最新文献

Propulsion mechanisms of micro/nanorobots: a review

IF 6.7 3区材料科学

Nanoscale Pub Date : 2024-06-28 DOI: 10.1039/d4nr01776e

Tao He, Yonghui Yang, Xue-Bo Chen

引用次数: 0

Correction: Phase behavior of patchy colloids confined in patchy porous media

IF 6.7 3区材料科学

Nanoscale Pub Date : 2024-06-28 DOI: 10.1039/d4nr90128b

Yurij V. Kalyuzhnyi, Taras Patsahan, Myroslav Holovko, Peter T. Cummings

引用次数: 0

High-performance flexible resistive random-access memory based on SnS₂ quantum dots with a charge trapping/de-trapping effect. 基于具有电荷捕获/解捕获效应的 SnS2 量子点的高性能柔性电阻式随机存取存储器。

IF 5.8 3区材料科学

Nanoscale Pub Date : 2024-06-27 DOI: 10.1039/d4nr00745j

Hua An, Yiyang Li, Yi Ren, Yili Wan, Weigao Wang, Zhenhua Sun, Junwen Zhong, Zhengchun Peng

引用次数: 0

Size Onset of Metallic Behavior in Neutral Aluminum Clusters

IF 6.7 3区材料科学

Nanoscale Pub Date : 2024-06-27 DOI: 10.1039/d4nr02032d

Chase Rotteger, Carter Jarman, Shaun Sutton, Scott Sayres

{"title":"Size Onset of Metallic Behavior in Neutral Aluminum Clusters","authors":"Chase Rotteger, Carter Jarman, Shaun Sutton, Scott Sayres","doi":"10.1039/d4nr02032d","DOIUrl":"https://doi.org/10.1039/d4nr02032d","url":null,"abstract":"The excited state lifetimes of neutral (Al)n clusters up to ~1 nm in diameter in size, where n ≤ 43, are systematically measured with femtosecond time-resolved mass spectrometry. The onset of metallic behavior is identified as a distinct change in the relaxation behavior initiated with single ultraviolet (400 nm) photon excitation. The experimentally measured excited state lifetimes gradually decrease with size for small molecular scale clusters (n < 10) before becoming indistinguishable for larger clusters (n > 9), where the measurements are comparable to electron-lattice relaxation time of bulk Al (~300 fs). Particularly intense, or magic, Aln clusters do not exhibit any significant excited state lifetime behavior. Time-dependent density functional theory quantify the excited state properties and are presented to show that dynamics are strongly tied to the excited state charge carrier distributions and overlap, rather than detailed changes related to changes in the cluster’s electronic and geometric structure. The consistency in excited state lifetimes for clusters larger than n = 9 is attributed to the hybridization of the s- and p- orbitals as well as increasing delocalization. Al3 exhibits unique temporal delay in its transient behavior that is attributed to a transition from triangular ground state to linear structure upon excitation.","PeriodicalId":92,"journal":{"name":"Nanoscale","volume":null,"pages":null},"PeriodicalIF":6.7,"publicationDate":"2024-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141461715","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

Unveiling Cutting-Edge Developments: Architectures and Nanostructured Materials in Optoelectronic Artificial Synapses

IF 6.7 3区材料科学

Nanoscale Pub Date : 2024-06-27 DOI: 10.1039/d4nr00904e

Naveed Ur Rahman, Rajwali Khan, Muhammad Faisal Hayat, D. Ghernaout, Alsamani A. M. Salih, Ghulam Abbas Ashraf, Abdus Samad, Muhammad Adil Mahmood, Nasir Rahman, Mohammad Sohail, Shahid Iqbal, Sherzod Shukhratovich Abdullaev, Alamzeb Khan

{"title":"Unveiling Cutting-Edge Developments: Architectures and Nanostructured Materials in Optoelectronic Artificial Synapses","authors":"Naveed Ur Rahman, Rajwali Khan, Muhammad Faisal Hayat, D. Ghernaout, Alsamani A. M. Salih, Ghulam Abbas Ashraf, Abdus Samad, Muhammad Adil Mahmood, Nasir Rahman, Mohammad Sohail, Shahid Iqbal, Sherzod Shukhratovich Abdullaev, Alamzeb Khan","doi":"10.1039/d4nr00904e","DOIUrl":"https://doi.org/10.1039/d4nr00904e","url":null,"abstract":"One of its feasible outcomes to low features in the classical von Neumann formulating system is a brain-inspired photonics technology derived from human brain ideas. Optoelectronic neural devices, which are accustomed to imitating the sensory role in the biological synapse by adjusting connection measures, may be used to make a highly reliable neurologically calculating device, wherein nanosized materials and device designs are attracting attention since they provide numerous potential benefits in terms of limited cool contact, rapid transfer fluidity, as well as the capture of photocarriers. In addition, the combination of classic nanosized photodetectors with recently generated digital synapses offers promising results in a variety of practical uses, like data processing and computation. The present progress in constructing improved optoelectronic synaptic devices that rely on nanomaterials for example 0-Dimension (quantum dots), 1-Dimension, and 2-Dimention composites, besides the continuously rising mixed heterostructures, is the focus of this article. Furthermore, the obstacles and hopeful diagnoses in this field of study are explored.","PeriodicalId":92,"journal":{"name":"Nanoscale","volume":null,"pages":null},"PeriodicalIF":6.7,"publicationDate":"2024-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141462399","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

Dual-template synergistic assembly strategy towards extra-small nitrogen-doped mesoporous carbon nanospheres with large-pore

IF 6.7 3区材料科学

Nanoscale Pub Date : 2024-06-27 DOI: 10.1039/d4nr01072h

Caicheng Song, Yiwen Guo, Tianwei Wang, Kun Liu, Pin-Yi Zhao, Ying Liu, He Huang, Rongwen Lu, Shufen Zhang

{"title":"Dual-template synergistic assembly strategy towards extra-small nitrogen-doped mesoporous carbon nanospheres with large-pore","authors":"Caicheng Song, Yiwen Guo, Tianwei Wang, Kun Liu, Pin-Yi Zhao, Ying Liu, He Huang, Rongwen Lu, Shufen Zhang","doi":"10.1039/d4nr01072h","DOIUrl":"https://doi.org/10.1039/d4nr01072h","url":null,"abstract":"Functional mesoporous carbon nanomaterials with large pores and small particle sizes have broad accessibility, but remain challenging to achieve. This study proposed a dual-template synergistic assembly strategy to facilely synthesize extra-small nitrogen-doped mesoporous carbon nanospheres with large pores in a low-cost manner. Directed by the synergistic effect of the combination of surfactants, sodium oleate (anionic surfactant) and triblock copolymers-P123 (nonionic surfactant) were selected as a template to construct nanomicelles (nanoemulsions), which were co-assembled with melamine-based oligomers to form composite nanomicelles, thus obtaining nitrogen-doped mesoporous polymer nanospheres (NMePS) and then nitrogen-doped mesoporous carbon nanospheres (NMeCS). Based on Schiff base chemistry, the melamine-based oligomers with self-assembly capability were synthesized as precursors, which is different from the conventional synthetic route of melamine-formaldehyde resin. The key parameters involved in the route were investigated comprehensively and correlated with characterization results. Furthermore, the 50 nm-scale particle size and the large mesoporous size of 5.5 nm can facilitate effective mass transport, coupled with its high nitrogen content (15.7 wt. %), contributing to its excellent performance in lithium-ion batteries.","PeriodicalId":92,"journal":{"name":"Nanoscale","volume":null,"pages":null},"PeriodicalIF":6.7,"publicationDate":"2024-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141461870","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

Structure evolution and specific effect for catalysis of atomically ordered intermetallic compounds

IF 6.7 3区材料科学

Nanoscale Pub Date : 2024-06-27 DOI: 10.1039/d4nr01939c

Lei Wang, Zequan Ma, Jia Xue, Yilin Dong, Lin-Wei Chen, Yu Gu, Hui Shi

引用次数: 0

Atomic force microscopy analysis of Pel polysaccharide- and type IV pili-mediated adhesion of Pseudomonas aeruginosa PA14 to an abiotic surface. 原子力显微镜分析铜绿假单胞菌 PA14 由多糖和 IV 型纤毛球介导的对非生物表面的粘附。

IF 5.8 3区材料科学

Nanoscale Pub Date : 2024-06-27 DOI: 10.1039/d4nr01415d

Audrey Beaussart, Telmo O Paiva, Christopher J Geiger, Amy E Baker, George A O'Toole, Yves F Dufrêne

{"title":"Atomic force microscopy analysis of Pel polysaccharide- and type IV pili-mediated adhesion of Pseudomonas aeruginosa PA14 to an abiotic surface.","authors":"Audrey Beaussart, Telmo O Paiva, Christopher J Geiger, Amy E Baker, George A O'Toole, Yves F Dufrêne","doi":"10.1039/d4nr01415d","DOIUrl":"10.1039/d4nr01415d","url":null,"abstract":"Type IV pili (TFP) contribute to the ability of microbes such as Pseudomonas aeruginosa to engage with and move across surfaces. We reported previously that P. aeruginosa TFP generate retractive forces of ∼30 pN and provided indirect evidence that TFP-mediated surface attachment was enhanced in the presence of the Pel polysaccharide. Here, we use different mutants defective in flagellar, Pel production or TFP production - alone or in combination - to decipher the relative contribution of these biofilm-promoting factors for P. aeruginosa adhesion. By means of atomic force microscopy (AFM), we show that mutating the flagellum (ΔflgK mutant) results in an increase in Pel polysaccharide production, but this increase in Pel does not result in an increase in surface adhesive properties compared to those previously described for the WT strain. By blocking Pel production in the ΔflgK mutant (ΔflgKΔpel), we directly show that TFP play a major role in the adhesion of the bacteria to hydrophobic AFM tips, but that the adhesion force is only slightly impaired by the absence of Pel. Inversely, performing single-cell force spectroscopy measurements with the mutant lacking TFP (ΔflgKΔpilA) reveals that the Pel can modulate the attachment of the bacteria to a hydrophobic substrate in a time-dependent manner. Finally, little adhesion was detected for the ΔflgKΔpilAΔpelA triple mutant, suggesting that both TFP and Pel polysaccharide make a substantial contribution to bacteria-substratum interaction events. Altogether, our data allow us to decipher the relative contribution of Pel and TFP in the early attachment by P. aeruginosa.","PeriodicalId":92,"journal":{"name":"Nanoscale","volume":null,"pages":null},"PeriodicalIF":5.8,"publicationDate":"2024-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141236386","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

Surface Chemistry Altering Electronic Behaviours of Liquid Metal-Derived Tin Oxide Nanosheets

IF 6.7 3区材料科学

Nanoscale Pub Date : 2024-06-27 DOI: 10.1039/d4nr01841a

Xiaotian Wei, Chung Nguyen, Patrick David Taylor, Vaishnavi Krishnamurthi, Nitu Syed, Phuong Le, Michelle Jeanette Sapountzis Spencer, Torben Daeneke, Lei Bao

{"title":"Surface Chemistry Altering Electronic Behaviours of Liquid Metal-Derived Tin Oxide Nanosheets","authors":"Xiaotian Wei, Chung Nguyen, Patrick David Taylor, Vaishnavi Krishnamurthi, Nitu Syed, Phuong Le, Michelle Jeanette Sapountzis Spencer, Torben Daeneke, Lei Bao","doi":"10.1039/d4nr01841a","DOIUrl":"https://doi.org/10.1039/d4nr01841a","url":null,"abstract":"Possessing excellent electronic properties and high chemical stability, semiconducting n-type two-dimensional (2D) tin dioxide (SnO2) nanosheets have recently been featured in sensing and electrocatalysis applications. Derived from non-layered crystal structures, 2D SnO2 has abundant unsaturated dangling bonds existing at the surface, providing interfacial activity. How the surface chemistry alters the electronic properties of 2D SnO2 remains unexplored. In this study, we synthesised ultra-thin 2D SnO2 using a liquid metal (LM) touch printing technique and investigated experimentally and theoretically how the interactions of organic solvents composed of alkyl and hydroxyl groups with the surface of LM-derived SnO2 modulate electronic properties. It was found that alkane solvents can physically absorb onto the SnO2 surface with no impact on the material conductivity. Alcohol-based solvents on the other hand interact with the SnO2 surface via chemical absorptions primarily, in which oxygen atoms of hydroxyl groups in the alcohols can bond with the surface atoms of SnO2. The bond stability is determined by the length and configuration of the hydrocarbon chain in alcohols. As representative long-chain alcohols, 1-octanol and 1-pentanol bind onto the SnO2 surface strongly, lowering the binding energy of Sn4+ and reducing the electron transfer ability of SnO2 nanosheets. Consequently, the electronic properties, i.e. conductivity and electronic mobility of SnO2 nanosheet-based electronic devices are decreased significantly.","PeriodicalId":92,"journal":{"name":"Nanoscale","volume":null,"pages":null},"PeriodicalIF":6.7,"publicationDate":"2024-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141461932","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

Room temperature ferroelectricity and an electrically tunable Berry curvature dipole in III-V monolayers. 室温铁电性和 III-V 单层中的电可调贝里曲率偶极。

IF 5.8 3区材料科学

Nanoscale Pub Date : 2024-06-27 DOI: 10.1039/d4nr00336e

Ateeb Naseer, Achintya Priydarshi, Pritam Ghosh, Raihan Ahammed, Yogesh Singh Chauhan, Somnath Bhowmick, Amit Agarwal

引用次数: 0