Nanoscale最新文献_第9页

Catalyst-assisted growth of CsPbBr3 perovskite nanowires

IF 6.7 3区材料科学

Nanoscale Pub Date : 2024-12-10 DOI: 10.1039/d4nr03158j

Karam Shreteh, Michael Volokh, Taleb Mokari

引用次数: 0

DC Field-biased Multibit/Analog Artificial Synapse Featuring an Additional Degree of Freedom for Performance Tuning

IF 6.7 3区材料科学

Nanoscale Pub Date : 2024-12-09 DOI: 10.1039/d4nr03464c

Milad Jabri, Faramarz Hossein-Babaei

{"title":"DC Field-biased Multibit/Analog Artificial Synapse Featuring an Additional Degree of Freedom for Performance Tuning","authors":"Milad Jabri, Faramarz Hossein-Babaei","doi":"10.1039/d4nr03464c","DOIUrl":"https://doi.org/10.1039/d4nr03464c","url":null,"abstract":"Multibit/analog artificial synapses are in demand for neuromorphic computing systems. A problem hindering the utilization of memristive artificial synapses in commercial neuromorphic systems is the rigidity of their functional parameters, plasticity in particular. Here, we report fabricating polycrystalline rutile-based memristive memory segments with Ti/poly-TiO2/Ti structures featuring multibit/analog storage, and the first use of a tunable DC-biasing for synaptic plasticity adjustment from short- to long-term. The unbiased device is of short-term plasticity, positive biasing increases the remanence of the recorded events and the device gains long-term plasticity at a specific biasing level determined by device geometry. The adjustability of the biasing field provides an additional degree of freedom allowing performance tuning; the paired-pulse facilitation index of the device is tuned by the biasing level adjustment providing further functional versatility. An appropriately biased segment provides more than 10 synaptic weight levels linearly depending on the number and duration of the stimulating spikes. The relationship with spikes magnitude is exponential. The experimentally determined nonlinearity coefficient of the biased device for 50 potentiating spikes is comparable with the best published data. The spike-timing-dependent plasticity determined experimentally for the biased device at its long-term plasticity mode fits the mathematical relationship developed for the biological synapses. Fabricated on a titanium metal foil, the produced memristors are sturdy and flexible making them suitable for wearable and implantable intelligent electronics. Our findings are anticipated to raise the potential of forming artificial synapses out of polycrystalline metal oxide thin films.","PeriodicalId":92,"journal":{"name":"Nanoscale","volume":"2 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142797611","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

Targeted Delivery of Cytotoxic Proteins via Lipid-based Nanoparticles to Langerhans cells

IF 6.7 3区材料科学

Nanoscale Pub Date : 2024-12-09 DOI: 10.1039/d4nr03638g

Nowras Rahhal, Mareike Rentzsch, Saskia Seiser, Christian Freystätter, Adelheid Elbe- Bürger, Christoph Rademacher

{"title":"Targeted Delivery of Cytotoxic Proteins via Lipid-based Nanoparticles to Langerhans cells","authors":"Nowras Rahhal, Mareike Rentzsch, Saskia Seiser, Christian Freystätter, Adelheid Elbe- Bürger, Christoph Rademacher","doi":"10.1039/d4nr03638g","DOIUrl":"https://doi.org/10.1039/d4nr03638g","url":null,"abstract":"Targeted delivery has emerged as a critical strategy in the development of novel therapeutics. The advancement of nanomedicine hinges on the safe and precise cell-specific delivery of protein-based therapeutics to the immune system. However, major challenges remain, such as developing an efficient delivery system, ensuring specificity, minimizing off-target effects, and attaining effective intracellular localization. Our strategy utilizes lipid-based nanoparticles conjugated with a glycomimetic ligand. These nanoparticles selectively bind to langerin, a C-type lectin receptor uniquely expressed on Langerhans cells in the skin. We opted for cytotoxic proteins, namely cytochrome C and saporin, as model proteins to showcase the potential of delivering intact proteins to Langerhans cells. These proteins are recognized for their ability to induce apoptosis upon entry into the cytosol. We observed specific killing of cells expressing langerin in-vitro, and in primary Langerhans cells isolated from mouse and human skin ex-vivo with minimal off target effects. By delivering functional proteins within lipid nanoparticles to Langerhans cells, our approach offers a new potential to deliver effective therapeutics with minimal side effects.","PeriodicalId":92,"journal":{"name":"Nanoscale","volume":"12 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142797610","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

Harnessing mixed-phase MoS₂ for efficient room-temperature operated ammonia sensing

IF 6.7 3区材料科学

Nanoscale Pub Date : 2024-12-09 DOI: 10.1039/d4nr03037k

Md Abdul Jalil, Kamrul Hassan, Trong Tuan Anh Tran, Tran Thanh Tung, Manas Ranjan Panda, Sally El Meragawi, Tetsuya Kida, Mainak Majumder, Dusan Losic

{"title":"Harnessing mixed-phase MoS₂ for efficient room-temperature operated ammonia sensing","authors":"Md Abdul Jalil, Kamrul Hassan, Trong Tuan Anh Tran, Tran Thanh Tung, Manas Ranjan Panda, Sally El Meragawi, Tetsuya Kida, Mainak Majumder, Dusan Losic","doi":"10.1039/d4nr03037k","DOIUrl":"https://doi.org/10.1039/d4nr03037k","url":null,"abstract":"Molybdenum disulfide (MoS₂), a notable two-dimensional (2D) material, has attracted considerable interest for its potential applications in gas sensing, despite its typically insulating characteristics, which have limited its practical use. In this study, we present the use of a mixed phase of MoS₂ (1T@2H- MoS₂) to overcome sensing limitations of the MoS₂ material by enhancing its conductivity and demonstrating its high-performing characteristics for sensing ammonia (NH₃) at room temperature (20oC). The 1T@2H- MoS₂ was synthesized via a hydrothermal process, and the coexistence of two different phases (1T and 2H phases) was confirmed by transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), and Raman spectroscopy. The flower-like morphology was confirmed by field emission scanning electron microscopy (FESEM) and TEM. Our results indicate that the presence of both 1T and 2H phases within the material introduces sulfur vacancies, which we propose are critical to significantly enhancing its sensitivity to NH₃ gas. The ammonia sensing performance of the 1T@2H- MoS₂ material was evaluated, demonstrating rapid and selective detection of NH₃ gas across a wide concentration range (2 ppm to 100 ppm), with a very swift response time (7 sec), fast recovery and high selectivity at room temperature without requiring heating. This improvement is attributed to the increased conductivity and effective active sites provided by the sulfur defects. This study underscores the potential of mixed-phase MoS₂ in developing fast-responsive and highly selective NH₃ sensors, paving the way for the safety monitoring of hazardous gases in various industrial settings.","PeriodicalId":92,"journal":{"name":"Nanoscale","volume":"51 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142793542","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

Enhanced Two-Photon Absorption in Hydrothermally Synthesized La2O6Te Nanorods for Visible Light Photo Detection

IF 6.7 3区材料科学

Nanoscale Pub Date : 2024-12-09 DOI: 10.1039/d4nr04101a

Prabhukrupa Chinmay Kumar, Swikruti Supriya, Ashutosh Mohapatra, Sripan Chinnaiyah, Ramakanta Naik

{"title":"Enhanced Two-Photon Absorption in Hydrothermally Synthesized La2O6Te Nanorods for Visible Light Photo Detection","authors":"Prabhukrupa Chinmay Kumar, Swikruti Supriya, Ashutosh Mohapatra, Sripan Chinnaiyah, Ramakanta Naik","doi":"10.1039/d4nr04101a","DOIUrl":"https://doi.org/10.1039/d4nr04101a","url":null,"abstract":"In the present study, lanthanum oxytellurate (LOT) samples with varying (La: Te ratio) are successfully synthesized using a simple hydrothermal method that possesses enormous advantages. The prepared samples crystallize in a La2O6Te composite phase with an orthorhombic crystal system. Nanorods, like morphology, are observed for each sample, and the presence of constituent elements is verified from EDX results. Chemical compositions and their oxidation states are obtained from XPS studies. Optical studies of the materials demonstrated bandgap values between 2.65 and 2.78 eV, confirming the LOT samples' semiconducting nature. Broad photoluminescence (PL) spectra with peaks ranging between 650 and 750 nm were observed, and a red shift occurred by raising the Te concentration in the samples. Overall, the samples exhibit good photo response characteristics under dark and light conditions with high Ion/Ioff ratios and sensitivity values. These parameters testify to the potential of LOT materials to stand out as an alternative for susceptible and effective photo detector devices. Among the samples, LOT-2 showed 10.64 AW-1 of responsivity, 5.8 × 107 Jones of detectivity, and rise and fall time of 16.25 and 23.13 sec, respectively, which is the best photodetection performance compared to the other two samples. Results from the nonlinear optical (NLO) Z-scan study demonstrated the RSA behavior and valley-peak configuration with positive n2 values corresponding to the self-focusing effect. The NLO characteristics of the materials are governed by the two-photon absorption (2PA) mechanism. Here, the LOT-2 sample displayed comparatively better results than the other two. The third-order nonlinear optical NLO susceptibility χ(3) values suggest that LOT materials have the potential to become a new candidate to look for various NLO applications in the coming days.","PeriodicalId":92,"journal":{"name":"Nanoscale","volume":"21 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142793749","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

A roller-type triboelectric nanogenerator based on rotational friction between wool and stacked interface for omnidirectional wind energy harvesting

IF 6.7 3区材料科学

Nanoscale Pub Date : 2024-12-09 DOI: 10.1039/d4nr04358h

Yuxiang Su, Xiaonan Su, Hongjun Yan, Xinyao Zhang, Guanyu Dai, Xin Dong, Jinlin Wu, Xizeng Zhao, Keyang Zhao, Zhenhua Li

{"title":"A roller-type triboelectric nanogenerator based on rotational friction between wool and stacked interface for omnidirectional wind energy harvesting","authors":"Yuxiang Su, Xiaonan Su, Hongjun Yan, Xinyao Zhang, Guanyu Dai, Xin Dong, Jinlin Wu, Xizeng Zhao, Keyang Zhao, Zhenhua Li","doi":"10.1039/d4nr04358h","DOIUrl":"https://doi.org/10.1039/d4nr04358h","url":null,"abstract":"It is urgently desired to develop high-performance wind energy collectors to power numerous microelectronic devices along with the era of the Internet of Things (IoT). A roller-type triboelectric nanogenerator (R-TENG) based on rotational friction between wool and stacking interface is proposed and efficiently used for harvesting wind energy. The wool, an electropositive and flexible material, is utilized in the design, effectively reducing abrasion on the contact surface and adjusting the output in response to varying compression levels. The conductive layer greatly enhances the output performance, which produces more induced charge by stacking different triboelectric materials in a particular order. By adding bottom power generation units, the internal space of the unit can be fully utilized to improve its energy conversion efficiency. At 900 rpm of the motor, the instantaneous open-circuit voltage (VOC), short-circuit current (ISC), and the transferred charge (QSC) of the R-TENG can reach 1504 V, 67.24 μA and 157.4 nC, respectively. After connection to a load via a rectifier bridge, the R-TENG has a maximum power output of 14.58 mW and an instantaneous power density of 11.7 W/m3. In laboratory wind energy harvesting experiments, the design can easily drive at least 720 LEDs and charge a 2000 μF capacitor up to about 1.5 V in 78 s. In practice, the R-TENG can collect natural wind on windy seashores and moving vehicles to charge capacitors and successfully drive small electronic devices in real-time. The experimental results indicate that the stacked PTFE/FKM/WOOL R-TENG exhibits considerable output performance, making it a promising solution for efficiently capturing wind energy from all directions.","PeriodicalId":92,"journal":{"name":"Nanoscale","volume":"16 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142793757","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

Grazing-incidence x-ray diffraction elucidates structural correlations in fluid monolayers of lipids and surfactants

IF 6.7 3区材料科学

Nanoscale Pub Date : 2024-12-09 DOI: 10.1039/d4nr04198d

Joshua Reed, Miriam Grava, Chen Shen, Gerald Brezesinski, Emanuel Schneck

引用次数: 0

Computational exploration of chemically ordered and disordered M-sites in M'2M''B2 and M'4M''B3 compounds

IF 6.7 3区材料科学

Nanoscale Pub Date : 2024-12-09 DOI: 10.1039/d4nr02948h

Adam Carlsson, Rodrigo Mantovani Ronchi, J. Rosen, Martin Dahlqvist

{"title":"Computational exploration of chemically ordered and disordered M-sites in M'2M''B2 and M'4M''B3 compounds","authors":"Adam Carlsson, Rodrigo Mantovani Ronchi, J. Rosen, Martin Dahlqvist","doi":"10.1039/d4nr02948h","DOIUrl":"https://doi.org/10.1039/d4nr02948h","url":null,"abstract":"Boron-based materials are highly desirable for their promising mechanical properties, rendering them ideal for various industrial applications. In this study, we capitalize on the advantage of the two unique metal sites in the V3B2 (4h and 2a) and Cr5B3 (16h and 4c) prototype structures. These two sites are further considered when alloying between two different metals, M' and M'', forming novel B-based ternary M'2M''B2 and M'4M''B3 compounds. A high-throughput phase stability search encompassing a total of 2738 compositions with M' and M'' being occupied systematically with Al, Si, Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Ga, Ge, Y, Zr, Nb, Mo, Tc, Ru, Rh, Pd, Ag, Cd, In, Sn, Hf, Ta, W, Re, Os, Ir, Pt, Au, Hf, Tl, and Pb was further performed. The thermodynamic phase stability of the simulated materials was assessed by evaluating the formation enthalpy, ∆Hcp. Additionally, simulated disordered metals were further considered in systems with compounds identified as stable or close to stable. In total, 56 ternary phases were identified as stable when considering a configurational entropy contribution at 2000 K. 32 out of the 56 predicted stable phases displayed a preference for chemical order whereas 24 favored disorder of M' and M''. Initial synthesis attempts of the predicted stable Ta2MoB2 compound were made, showing indications for presence ordered Ta2MoB2 or disordered (Ta0.667Mo0.333)3B2.","PeriodicalId":92,"journal":{"name":"Nanoscale","volume":"38 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142793538","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

Correlating Photochemical H2 Production and Excited State Lifetimes of Heterostructured and Doped ZnCdS Nanoparticles

IF 6.7 3区材料科学

Nanoscale Pub Date : 2024-12-09 DOI: 10.1039/d4nr04427d

Matthew Fortunato, Joseph Matthew O'Shea, Jie Huang, Hashini Chandrasiri, Eun Byoel Kim, Abdelqader Jamhawi, A. Jean-Luc Ayitou, Preston Snee, Claudia Turro

引用次数: 0

Controllable synthesis and biomedical applications of bismuth-based nanospheres: enhanced photothermal therapy and CT imaging efficiency

IF 6.7 3区材料科学

Nanoscale Pub Date : 2024-12-09 DOI: 10.1039/d4nr04024d

Dongxun Chen, Baowang Miao, Guidong Zhu, Yanjie Liang, Chengwei Wang

{"title":"Controllable synthesis and biomedical applications of bismuth-based nanospheres: enhanced photothermal therapy and CT imaging efficiency","authors":"Dongxun Chen, Baowang Miao, Guidong Zhu, Yanjie Liang, Chengwei Wang","doi":"10.1039/d4nr04024d","DOIUrl":"https://doi.org/10.1039/d4nr04024d","url":null,"abstract":"The advancement and utilization of nano-scale biomaterials in the diagnosis and treatment of tumors have been notable over the last few decades, primarily owing to their appealing characteristics such as small particle size, adjustable properties, and remarkable biocompatibility. The creation of nanomaterials possessing versatility and customizable nature, consequently, holds great promise for advancing healthcare and improving patient outcomes. Here, we report the controllable synthesis of monodisperse bismuth-based (Bi2S3, Bi, and Bi2O3) nanoparticles with uniform spherical morphology and size distribution, and evaluate their potential for CT imaging and photothermal therapy applications. Monodisperse Bi2S3 nanospheres were initially synthesized in aqueous solution using a low-temperature precipitation method. Subsequently, Bi and Bi2O3 nanospheres were prepared through the NaBH4 reduction and the H2O2 oxidation of the as-synthesized Bi2S3 templates, respectively. Photothermal conversion and CT imaging characterizations confirm the superiority of Bi nanospheres over Bi2S3 and Bi2O3 nanospheres in terms of their excellent photothermal conversion efficiency (~40.10%) and CT contrast efficiency (~34.32 HU mL mg-1). Furthermore, it is demonstrated that Bi nanospheres exhibit significant advantages in CT imaging and photothermal effects by using the glioma mouse model, notably achieving a tumor area temperature increase to 53.6°C after near-infrared laser irradiation. This work furnishes theoretical and experimental evidence for bismuth-based nanomaterials as valuable tools in various biomedical applications.","PeriodicalId":92,"journal":{"name":"Nanoscale","volume":"37 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142793539","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