Nanoscale Advances最新文献

{"title":"L-cysteine capped MoS2 QDs for dual-channel imaging and superior Fe3+ ion sensing in biological systems","authors":"Vishakha Takhar, Simranjit Singh, Superb Misra, Rupak Banerjee","doi":"10.1039/d4na00505h","DOIUrl":"https://doi.org/10.1039/d4na00505h","url":null,"abstract":"MoS2 quantum dots (MQDs) with an average size of 1.9±0.7 nm were synthesized using a microwave-assisted method. Absorbance studies confirmed characteristic transitions of MoS2, with absorption humps at 260-280 nm and 300-330 nm, and a band gap of 3.6 ± 0.1 eV. Fluorescence emission studies showed dominant blue and some green emissions under 315 nm excitation, with an absolute quantum yield of ~ 9%. The MQDs exhibited fluorescence stability over time after repeated quenching cycles across various pH and media systems. In vitro toxicity tests indicated cytocompatibility, with around 80% cell survival at 1000 mg L-1. Confocal imaging demonstrated significant uptake and vibrant fluorescence in cancerous and non-cancerous cell lines. The MQDs showed strong selectivity towards Fe3+ ions, with a detection limit of 27.61 ± 0.25 nM. Recovery rates for Fe3+ in phosphate buffer saline (PBS) and simulated body fluid (SBF) systems were >97% and >98%, respectively, with a relative standard deviation (RSD) within 3%, indicating precision. These findings suggest that MQDs have high potential for diagnostic applications involving Fe3+ detection due to their fluorescence stability, robustness, enhanced cell viability, and dual-channel imaging properties.","PeriodicalId":18806,"journal":{"name":"Nanoscale Advances","volume":null,"pages":null},"PeriodicalIF":4.7,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142175658","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}

{"title":"Catalytic amplification platform based on Fe2O3 nanoparticles decorated graphene nanocomposite for highly sensitive detection of rutin","authors":"Zhuzhen Chen, Tingting Zhang, Xue Zhang, Wangxing Cheng, Lin-Wei Chen, Nannan Lu","doi":"10.1039/d4na00583j","DOIUrl":"https://doi.org/10.1039/d4na00583j","url":null,"abstract":"Exploration of nanocomposites with exceptional catalytic activities is essential for harnessing the unique advantages of each constituent in the domains of pharmaceutical analysis and electrochemical sensing. In this regard, we illustrated the synthesis of iron oxide/N-doped reduced graphene oxide (Fe2O3/N-rGO) nanocomposite through a one-step thermal treatment of iron phthalocyanine (FePc), melamine, and graphene oxide for electrochemical sensing. The large specific surface area and good conductivity of N-rGO can efficiently capture rutin molecules and accelerate the electron transport, thereby improving the electrochemical performance. Moreover, the Fe2O3 nanoparticles with distinct electronic characteristics significantly enhanced the detection sensitivity of the constructed electrochemical platform. Because of the outstanding electrical conductivity, an extensive surface area, and synergistic catalysis, the Fe2O3/N-rGO was employed as an advanced electrode modifier to build an electrochemical sensing platform for rutin detection. Significantly, the manufactured sensor showed a broad detection range from 7 nM to 150 μM and a high sensitivity of 5632 μA mM-1. Furthermore, the fabricated sensor showed desirable results in terms of stability, selectivity, and practical application. This work presents a facile method to prepare Fe2O3/N-rGO and supplies a valuable example for building metal oxide/graphene nanocomposites for electrochemical analysis.","PeriodicalId":18806,"journal":{"name":"Nanoscale Advances","volume":null,"pages":null},"PeriodicalIF":4.7,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142175660","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}

{"title":"NIR-triggered photooxygenation of α-terpinene with upconversion nanohybrids","authors":"María González-Béjar, Laura Frances-Soriano, Delia Bellezza, Juan Ferrera-González, Julia Perez-Prieto","doi":"10.1039/d4na00528g","DOIUrl":"https://doi.org/10.1039/d4na00528g","url":null,"abstract":"Upconversion nanohybrids (UCNHs) consisting of rose bengal (RB) and upconversion nanoparticles (UCNPs) are able to promote terpinene oxidation upon near-infrared irradiation. The photophysical events occurring upon NIR-irradiation of the UCNH correlate well with the synthetic protocol used to prepare the UCNHs (RB loading and aggregation). These results highlight the importance of the optimization of UCNHs composition for the photocatalysis outcome.","PeriodicalId":18806,"journal":{"name":"Nanoscale Advances","volume":null,"pages":null},"PeriodicalIF":4.7,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142175659","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}

{"title":"A systematic study of TMOn (TM = V, Cr, Mn, and Fe; n = 3 and 6) clusters embedded in PtS2 monolayer","authors":"Thanh Tien Nguyen, Jonathan Sanchez Guerrero, Hoat Do Minh","doi":"10.1039/d4na00465e","DOIUrl":"https://doi.org/10.1039/d4na00465e","url":null,"abstract":"Doping-based magnetism engineering is an effective approach to make new multifunctional two-dimensional (2D) materials from the non-magnetic counterparts. In this work, doping with TMOn clusters (TM = V, Cr, Mn, and Fe; n = 3 and 6) is proposed to induce feature-rich electronic and magnetic properties in PtS2 monolayer. Pristine monolayer is a non-magnetic semiconductor with indirect energy gap of 1.81(2.67) eV as obtained from PBE(HSE06)-based calculations. PtS3-type multivacancies magnetize significantly the monolayer, induce the emergence of the half-metallicity. In this case, a total magnetic moment of 1.90 µB is obtained and magnetic properties are produced mainly by atoms around the vacancy sites. Meanwhile, PtS2 monolayer is metallized by creating PtS6-type multivacancies without magnetization. Depending on the type of TMOn cluster, feature-rich either diluted magnetic semiconductor or half-metallic natures are induced, which are regulated mainly by the incorporated clusters. Except for FeO6 cluster, TM atom and O atoms exhibit the antiparallel spin orientation, such that total magnetic moments between 1.00 and 4.00 µB are obtained. Meanwhile, the parallel spin ordering gives a large total magnetic moment of 5.99 µB for FeO6-doped monolayer. Furthermore, the Bader charge analysis indicates that all the clusters attract charge from the host monolayer that is mainly due to the electronegative O atoms. Our results may introduce the cluster doping as an efficient way to create new spintronic 2D materials from a non-magnetic PtS2 monolayer.","PeriodicalId":18806,"journal":{"name":"Nanoscale Advances","volume":null,"pages":null},"PeriodicalIF":4.7,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142175675","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}

{"title":"Optimization of plasmonic lens structure for maximum optical vortices induced on Weyl Semimetals Surface States","authors":"Ritwik Banerjee, Tanmoy Maiti","doi":"10.1039/d4na00336e","DOIUrl":"https://doi.org/10.1039/d4na00336e","url":null,"abstract":"Optical vortices have a topologically charged phase singularity, as well as zero intensity distribution in the centre. Optical vortex creation is regarded as a significant source for information transmission for applications in quantum computing, encryption, optical communication, etc. In the present work, using Finite Difference Time Domain (FDTD) simulation we have calculated electric field intensity and phase distribution of 2D lattice of optical vortices generated from various polygonal plasmonic lens structures using surface states of Weyl semimetal (MoTe2). It has been shown that hexagonal lens is the best performing plasmonic lens. Further we have posited here a unified mathematical formulation for the optical electrical field and phase distribution in the near field for any polygonal plasmonic lens. Our theoretical calculation corroborates well with the FDTD results validating the proposed generalized formula. Such plasmonic lens structures demonstrating scaling behavior offer great potential for designing next generation optical memories.","PeriodicalId":18806,"journal":{"name":"Nanoscale Advances","volume":null,"pages":null},"PeriodicalIF":4.7,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142175674","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}

{"title":"An overview of critical applications of resistive random access memory","authors":"Furqan Zahoor, Arshid Nisar, Usman Isyaku Bature, Haider Abbas, Faisal Bashir, Anupam Chattopadhyay, Brajesh Kumar Kaushik, Ali Alzahrani, Fawnizu Azmadi Hussin","doi":"10.1039/d4na00158c","DOIUrl":"https://doi.org/10.1039/d4na00158c","url":null,"abstract":"The rapid advancement of new technologies has resulted in a surge of data, while conventional computers are nearing their computational limits. The prevalent von Neumann architecture, where processing and storage units operate independently, faces challenges such as data migration through buses, leading to decreased computing speed and increased energy loss. Ongoing research aims to enhance computing capabilities through the development of innovative chips and the adoption of new system architectures. One noteworthy advancement is Resistive Random Access Memory (RRAM), an emerging memory technology. RRAM can alter its resistance through electrical signals at both ends, retaining its state even after power-down. This technology holds promise in various areas, including logic computing, neural networks, brain-like computing, and integrated technologies combining sensing, storage, and computing. These cutting-edge technologies offer the potential to overcome the performance limitations of traditional architectures, significantly boosting computing power. This discussion explores the physical mechanisms, device structure, performance characteristics, and applications of RRAM devices. Additionally, we delve into the potential future adoption of these technologies at an industrial scale, along with prospects and upcoming research directions.","PeriodicalId":18806,"journal":{"name":"Nanoscale Advances","volume":null,"pages":null},"PeriodicalIF":4.7,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142175676","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}

{"title":"Understanding mono- and bi-metallic Au and Ni nanoparticle responses to fast heating","authors":"Tatiana E. Itina","doi":"10.1039/d4na00634h","DOIUrl":"https://doi.org/10.1039/d4na00634h","url":null,"abstract":"Nanoparticle assembly, alloying and fragmentation are fundamental processes with significant implications in various fields such as catalysis, materials science, and nanotechnology. Understanding these processes under fast heating conditions is crucial for tailoring nanoparticle properties and optimizing their applications. For this, we employ molecular dynamics simulations to obtain atomic-level insights into nanoparticle behavior. The performed simulations reveal intricate details of sintering, alloying and fragmentation mechanisms shedding light on the underlying physical phenomena governing these processes. The calculation results help to visualize nanoparticle evolution upon undercritical and supercritical heating elucidating not only the role of temperature, but also of nanoparticle sizes and composition. In particular, it is shown that surface tension and surface energy play important roles not only in nanoparticle melting but also in its fragmentation. When the added energy exceeds a critical threshold, the nanoparticle begins to experience alternating compression and expansion. If the tensile stress surpasses the material's strength limit, fragmentation becomes prominent. For very small particles (with radius smaller than ∼10 nm), this occurs more rapidly, whereas sub-nano-cavitation precedes the final fragmentation in larger particles, which behave more like droplets. Interestingly, this effect depends on composition in the case of AuNi alloy nanoparticles, as expected from the phase diagrams and excess energy. The heating level required to overcome the mixing barrier is also determined and is shown to play an important role in the evolution of AuNi nanoparticles, in addition to their size. Furthermore, our findings provide insights into controlling nanoparticle synthesis for various applications in numerous nanotechnological domains, such as catalysis, sensors, material analysis, as well as deseas diagnostics and treatment. This study bridges the gap between experimental observations and theoretical predictions paving the way for designing advanced nanomaterials with enhanced functionalities.","PeriodicalId":18806,"journal":{"name":"Nanoscale Advances","volume":null,"pages":null},"PeriodicalIF":4.7,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142175677","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}

{"title":"Different morphologies of super-balls obtained to form photonic crystals of cholesteryl benzoate liquid crystals","authors":"Edina Rusen, Alexandra Mocanu, Adrian Dinescu, Adina Boldeiu, Cosmin Romanitan, Sergiu Iordanescu, Martino Aldrigo, Raluca Somoghi, Raul Mitran, Adi Ghebaur","doi":"10.1039/d4na00431k","DOIUrl":"https://doi.org/10.1039/d4na00431k","url":null,"abstract":"The current study highlights the synthesis and characterization of some nanocomposite materials formed by polymer particles and liquid crystals. The liquid crystals used were cholesteryl benzoate (CLB), and the particles were synthesized by emulsion polymerization in the absence of the emulsifier. Through SEM and DLS analysis, the synthesis of particles of the same size was emphasized, and the amount of CLB showed no influence on these parameters. The lack of signal for CLB in the case of DSC and XRD analyses for the sample with the smallest amount of liquid crystal is attributed to the detection limits of the devices. To complete the surface characterization of the particles, XPS analysis was performed. Through XPS it was underlined that in the case of the smallest amount and the largest amount of CLB, respectively, it is encapsulated in the polymer particles, unlike the case of the average amount used, in which core–shell type morphologies have been obtained. For the electrical characterization of the samples, a Vector Network Analyzer (VNA) connected to two rectangular X-band (<em>i.e.</em>, 8.2–12.4 GHz) waveguides through coaxial cables was used.","PeriodicalId":18806,"journal":{"name":"Nanoscale Advances","volume":null,"pages":null},"PeriodicalIF":4.7,"publicationDate":"2024-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142175697","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}

{"title":"Harnessing Sustainable Nanoclusters for Sensitive Optical Detection of Tetracyclines and the Underlying Mechanism","authors":"Miguel Justo-Tirado, Irene Pérez-Herráez, Jorge Escorihuela, Raul Arenal, Elena Zaballos, Julia Perez-Prieto","doi":"10.1039/d4na00637b","DOIUrl":"https://doi.org/10.1039/d4na00637b","url":null,"abstract":"Simple and rapid sensing methods for the detection of antibiotics in drinks and foods are highly desirable due to the presence of these drugs in food products as a consequence of an extensive abuse of antibiotics in livestock production. In this study, we report a facile synthesis strategy of gold nanoclusters (AuNCs) passivated with N-acetyl-L-cysteine (AuNC@NAC). This nanocluster exhibits a fluorescence emission peak at 700 nm, which gradually decreases at increasing concentrations of antibiotics, such as tetracyclines. The limit of detection (LOD) was determined to be 0.8 ppm with a linear range of 0.1-140 μM range (0.04-62 ppm). This method showcased exceptional selectivity in the detection of tetracyclines compared to anions, metallic cations, and aminoacids. The underlying mechanism has been elucidated and the fluorescence quenching was found to be a combination of dynamic and static quenching mechanisms, with photoinduced electron transfer (PET) identified as the primary process for the dynamic quenching.","PeriodicalId":18806,"journal":{"name":"Nanoscale Advances","volume":null,"pages":null},"PeriodicalIF":4.7,"publicationDate":"2024-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142175698","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}

{"title":"Customizable ligand exchange on the surface of gold nanotriangles enables their application in LSPR-based sensing.","authors":"Ekaterina Podlesnaia, Sarmiza Elena Stanca, Buşra Çinçin, Gabriel Zieger, Andrea Csáki, Wolfgang Fritzsche","doi":"10.1039/d4na00352g","DOIUrl":"https://doi.org/10.1039/d4na00352g","url":null,"abstract":"<p><p>Nanomaterials made of noble metals have been actively utilized in sensorics and bioanalytics. Nanoparticles of anisotropic shapes are promising for increasing sensitivity due to the generated hotspots of electron density. Such structures can be effectively manufactured by a relatively accessible colloidal synthesis. However, the shape control requires the attachment of a surfactant on specific crystal facets during their growth. Commonly used cetrimonium halides form a closely packed bilayer, lowering the surface accessibility for subsequent (bio)functionalization steps. While there are numerous studies on functionalizing gold nanospheres, novel materials, such as nanotriangles (AuNTs), often require thorough studies to adapt the existing procedures. This is mainly caused by the incomplete characterization of initial nanoparticle colloids in empirically developed protocols. Herein, we report a rational approach utilizing the surface area of AuNTs as a function of both their dimensions and concentration, determined with an express UV-VIS analysis. We demonstrate its efficiency for the exchange of cetyltrimethylammonium chloride (CTAC) with polystyrene sulfonate (PSS) and with biocompatible citrate using direct and indirect methods, respectively. Fourier-transform infrared spectroscopy unequivocally proves the ligand exchange. Such functionalization allows evaluating the bulk refractive index sensitivity of AuNTs as a measure of their potential in LSPR-based sensing.</p>","PeriodicalId":18806,"journal":{"name":"Nanoscale Advances","volume":null,"pages":null},"PeriodicalIF":4.6,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11375502/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142154618","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}