Carbon最新文献

{"title":"A graphene-based IR Fresnel lens formed on a multiple-internal-reflection substrate","authors":"Beom Won Seo ,&nbsp;Guk Hyun Nam ,&nbsp;Hyundo Yang ,&nbsp;Sanghee Jung ,&nbsp;Jongcheol Park ,&nbsp;Il-Suk Kang ,&nbsp;Deuk Young Kim ,&nbsp;Hak Dong Cho ,&nbsp;Jong-Kwon Lee","doi":"10.1016/j.carbon.2024.119811","DOIUrl":"10.1016/j.carbon.2024.119811","url":null,"abstract":"<div><div>We report on the adjustable lensing effect and switchable mode performance of a graphene-based Infrared (IR) Fresnel zone plate (FZP) formed on a double-side polished Si substrate. The focusing characteristics of the graphene FZP in the IR wavelength range have been systematically investigated as a function of the Fermi energy (<em>E</em>_<em>F</em>) of the multilayer graphene rings and the thickness of the Si substrate using the Finite-Difference Time-Domain method. This graphene FZP lens enhances the focal intensity of incident light at wavelengths where the multiple internal reflections in the Si substrate is periodically maximized. Also, the contrast ratios of reflectance and transmittance between the regions with and without graphene rings, which affects the focusing performance, are effectively controlled through intraband transitions depending on the <em>E</em>_<em>F</em> of graphene FZP pattern. Specifically, the 8-layer graphene FZP lens transmits the incident light with a wavelength of 8 μm when the <em>E</em>_<em>F</em> of the graphene is lower than 0.2 eV, while it operates as both transmissive and reflective Fresnel lens when the <em>E</em>_<em>F</em> exceeds 0.2 eV. By directly depositing Ag nanoparticles on this graphene FZP to enable <em>E</em>_<em>f</em> control of graphene rings without the need for electrodes, we have experimentally confirmed the focusing performance and mode conversion properties.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":null,"pages":null},"PeriodicalIF":10.5,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142655843","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dielectric synergistic gradient metamaterials enable exceptional ultra–wideband microwave absorption and antibacterial properties","authors":"Xin Yang ,&nbsp;Bohong Li ,&nbsp;Baoshun Lin ,&nbsp;Hong Wang ,&nbsp;Tong Zhu ,&nbsp;Xiao Su ,&nbsp;Yanyu Gao ,&nbsp;Zhanglu Lei ,&nbsp;Pingan Liu ,&nbsp;Qianqian Yu ,&nbsp;LinGe Wang","doi":"10.1016/j.carbon.2024.119813","DOIUrl":"10.1016/j.carbon.2024.119813","url":null,"abstract":"<div><div>Interface structure design and multi–component strategies for regulating electromagnetic parameters to achieve efficient microwave absorption remain a challenge. In this study, a composite film with a heterogeneous structure, PAN@PPy@Ti₃C₂T_x@GO (PPTG) was fabricated through electrospinning, in situ oxidative polymerization, and dip–coating processes, achieving excellent electromagnetic wave absorption and antibacterial properties. When the filler content is only 20 wt%, the PPTG film exhibits an ultra–wide bandwidth, with a minimum reflection loss value (<em>RLmin</em>) of −49.98 dB (2.2 mm, 16.72 GHz), and the maximum effective absorption bandwidth (<em>EAB</em>) reaches 8.0 GHz (2.5 mm). The outstanding absorption performance is attributed to quarter–wavelength theory, polarization, multiple reflections and scattering, impedance matching, metamaterial properties, quasi–antenna effect, conductive loss, and magnetic loss. Excitingly, the radar cross–section (RCS) of the PPTG film can be reduced by up to 25.72 dB•m², indicating excellent radar stealth properties. Moreover, the PPTG film exhibits excellent antibacterial properties. This research, based on the MXene absorber, provides new insights into the development of lightweight, efficient, and antibacterial microwave–absorbing materials.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":null,"pages":null},"PeriodicalIF":10.5,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142655842","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Replication of mechanochemical syntheses of γ-graphyne from calcium carbide fails to produce the claimed product","authors":"Ezra R. Kone ,&nbsp;Sarah Nasri ,&nbsp;Grace L. Parker ,&nbsp;Victor G. Desyatkin ,&nbsp;William B. Martin ,&nbsp;John F. Trant ,&nbsp;Valentin O. Rodionov","doi":"10.1016/j.carbon.2024.119808","DOIUrl":"10.1016/j.carbon.2024.119808","url":null,"abstract":"<div><div>Several recent articles by Cui and coworkers claim syntheses of γ-graphyne, a novel sp²/sp¹ allotrope of carbon, directly from calcium carbide. Here, we describe the replication of the key experiments from this series of articles. We did not observe the formation of γ-graphyne under the reported conditions. The characterization data from our replications are partially consistent with the results reported by Cui. However, we show that the claimed experiments produce only heavily contaminated, amorphous chars with no detectable sp¹ carbons.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":null,"pages":null},"PeriodicalIF":10.5,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142656265","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Highly stretchable and strain-insensitive multilayered electromagnetic interference shielding films prepared via a simple soaking-infiltration strategy","authors":"Ruilin Yin ,&nbsp;Tingkang Yuan ,&nbsp;Chengwei Li ,&nbsp;Hao Zhang ,&nbsp;Huan Chen ,&nbsp;Ningxuan Wen ,&nbsp;Xueqing Zuo ,&nbsp;Chen Chen ,&nbsp;Lujun Pan ,&nbsp;Zeng Fan","doi":"10.1016/j.carbon.2024.119809","DOIUrl":"10.1016/j.carbon.2024.119809","url":null,"abstract":"<div><div>Stretchable electromagnetic interference (EMI) shielding films are crucial for wearable electronics. However, it is challenging to further endow the EMI shielding films with good stretchability and satisfactory EMI shielding effectiveness (EMI SE) under large strains. Herein, we successfully prepared high-performance stretchable polydimethylsiloxane (PDMS)/single-walled carbon nanotube buckypaper (SWNT BP)/PDMS EMI shielding films with multi-graded conductive networks via a soaking-infiltration strategy. In this multilayered film, infiltration layers of SWNT/PDMS were particularly created between elastic PDMS and brittle SWNT BP. Owing to the multilayered structure and conductivity compensation effects arising from infiltration layers, our EMI shielding films exhibited excellent EMI SE of 34.2 dB with high stretchability of &gt;400 %. The outstanding EMI SE could be well maintained under large strains. At &lt;50 % strain, the relative change in EMI SE (|ΔSE/SE₀|) remained consistently below 10 %, while at even 100 % strain, |ΔSE/SE₀| was only ∼35 %. Furthermore, we proposed a parallel-series hybrid model to describe electrical conduction in straining films. Due to their excellent conductivity under strain, the films could also serve as stretchable Joule heaters. This work provides a novel and simple approach for constructing strain-insensitive conductive films, with potential applications in stretchable EMI shielding and thermal management.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":null,"pages":null},"PeriodicalIF":10.5,"publicationDate":"2024-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142655831","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The effects of CNT type, alignment and dopants on piezoresistance in CNT fibres","authors":"Anastasiia Mikhalchan ,&nbsp;Ángel Víctor Labordet Álvarez ,&nbsp;Moisés Zarzoso ,&nbsp;Carlos González ,&nbsp;Juan J. Vilatela","doi":"10.1016/j.carbon.2024.119810","DOIUrl":"10.1016/j.carbon.2024.119810","url":null,"abstract":"<div><div>Carbon nanotube fibres (CNTF) are piezoresistive, hence heralded as deformation sensors in applications ranging from flexible touch sensors to artificial skins and robotics. This work studies the piezoresistive behaviour of a wide range of CNT fibres from different sources, processing routes and microstructures. It provides a unifying view of the factors controlling piezoresistance in CNT fibres and related nanocarbon networks. We clarify the role of alignment and concentration of dopants and the constituent CNT type, demonstrating that the origin of piezoresistance in aligned fibres is the direct deformation of the constituent nanotubes, therefore, it is governed by the bulk modulus and thus the degree of CNT alignment. Doping through intercalation, which does not affect modulus or CNT separation, is detrimental to piezoresistive sensing, reducing the gauge factor proportionally to its decrease in resistivity. Aligned fibres show a quasi-linear piezoresistive response, with a positive change in resistance for all deformation modes applied: axial tension, axial or transverse compression. The axial gauge factor is shown to be proportional to fibre Young's modulus, with values of 2–9 for fibres spun from aerogels and above 30 for undoped fibres spun from liquid crystal solutions, respectively. Piezoresistance is attributed to the formation of internal barriers for conduction between metallic regions, which arise from the heterogeneous stress distribution along individual CNTs inherent in shear lag-type stress transfer. Commercial multifilament CNT yarns with a high degree of alignment and a format amenable for integration in large structures have demonstrated the piezoresistive gauge factors of 4 and sufficient sensitivity at strains below 1 % suitable for structural health monitoring of engineering structural composites.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":null,"pages":null},"PeriodicalIF":10.5,"publicationDate":"2024-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142656263","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Nitrogen-doped modified graphene aerogel enhancing interfacial bonding with lithium aluminium silicate ceramics for broadband microwave absorption","authors":"Jing'wen Qi ,&nbsp;Jia'qi Zhang ,&nbsp;Yu An ,&nbsp;Tian'yu Zhang ,&nbsp;Ran Wang ,&nbsp;Wen'xuan Zhang ,&nbsp;Yan'xin Zhang ,&nbsp;Ya'nan Yang ,&nbsp;Long Xia","doi":"10.1016/j.carbon.2024.119794","DOIUrl":"10.1016/j.carbon.2024.119794","url":null,"abstract":"<div><div>The swift progression of e-communication technology has resulted in significant electromagnetic pollution, necessitating the urgent need for effective microwave-absorbing materials to mitigate this issue. Augmenting heterogeneous phase interfaces and incorporating heteroatoms constitute viable strategies for enhancing the electromagnetic properties of functional materials. In this study, a series of lithium aluminium silicate glass-ceramic/nitrogen-doped graphene (LAS/N-GF) aerogels was synthesised via the hydrothermal and freeze-drying methods. An innovative bonding mechanism for the heterogeneous phase interface was revealed, in which nitrogen doping enabled the formation of lattice defects in LAS ceramic particles and graphene and promoted a closed approach for unsaturated carbon and silicon atoms to form carbon-silicon bonds through the electrostatic force generated by interfacial polarization. Given that covalent bonds are widely recognized as stable carrier channels, the presence of carbon-silicon bonds at the interface facilitates electron migration, ultimately leading to improved microwave absorption. The maximum absorptivity of the LAS/N-GF aerogels could reach −47.98 dB at 8.96 GHz with a filler loading as low as 10 wt%. It is noteworthy that the LAS/N-GF aerogel exhibits an effective absorption bandwidth of 8.34 GHz, which fully spans the entire X-band and more than two-thirds of the Ku-band. Such exceptional performance is rarely observed in dielectric loss materials. Finally, the application potential of the LAS/N-GF aerogels in microwave absorbers was simulated and analysed. The unique chemical phenomenon stemming from the bonding at the carbon material-ceramic interface offers a fresh perspective in interface science, enabling a deeper comprehension of the underlying mechanism of microwave absorption.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":null,"pages":null},"PeriodicalIF":10.5,"publicationDate":"2024-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142655839","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Exploring graphdiyne - Dynamic characterisation of the surface oxidation mechanisms via ReaxFF-MD and experiments","authors":"Q. Chen ,&nbsp;I.M. De Cachinho Cordeiro ,&nbsp;W. Yang ,&nbsp;A.C.Y. Yuen ,&nbsp;T.B.Y. Chen ,&nbsp;W. Wang ,&nbsp;W. Yang ,&nbsp;G.H. Yeoh ,&nbsp;R.K.K. Yuen","doi":"10.1016/j.carbon.2024.119793","DOIUrl":"10.1016/j.carbon.2024.119793","url":null,"abstract":"<div><div>Graphdiyne (GDY) is an emerging two-dimensional carbon allotrope comprising unique <em>sp</em>^<em>1</em> and <em>sp</em>^<em>2</em> hybridisation, which has attracted extensive investigation into various applications, especially as battery component materials owing to its excellent electromechanical properties. However, GDY's thermal stability and oxidation behaviour have yet to be evaluated, which is crucial to safety in high-energy applications. The present study characterised the thermophysical properties of GDY via reactive molecular dynamics (MD-ReaxFF) and experimental measurement. The oxidation kinetics and decomposition behaviour were elucidated and benchmarked with graphene (GP) and graphyne (GY) to investigate the correlation between thermal stability and morphology of carbon nanomaterials. The simulation results revealed the initial oxidation mechanism of GDY sheets, where the cleavage of C–C bonds was observed at the acetylenic chain and could be identified as the weak spots of the structural stability. As for oxidation kinetics, GDY's experimental and numerical activation energy was found to be 173.1 and 133 kJ/mol, which is lower than 220.8 kJ/mol of GP. The current work pioneer investigated the thermal stability of GDY using both experimental and numerical approaches. Meanwhile, different oxidation mechanisms between GP and GDY were distinguished and demonstrated in detail.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":null,"pages":null},"PeriodicalIF":10.5,"publicationDate":"2024-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142656264","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The probing of local charge with sulfur encapsulated in single-walled carbon nanotubes","authors":"Alexander A. Tonkikh ,&nbsp;Dmitry V. Rybkovskiy ,&nbsp;Andrey N. Enyashin ,&nbsp;Ekaterina A. Obraztsova ,&nbsp;Nguyen Van Chuc ,&nbsp;Elena D. Obraztsova","doi":"10.1016/j.carbon.2024.119806","DOIUrl":"10.1016/j.carbon.2024.119806","url":null,"abstract":"<div><div>In this study, we demonstrated the remarkable sensitivity to electrochemical local charge of sulfur chains encapsulated in small-diameter single-walled carbon nanotubes (S@SWCNTs). To perform micro- and macro-spectroscopic probing, a transparent electrochemical cell was designed in which the charging electrode is formed based on S@SWCNTs. During a short-term electrochemical charging, significant reversible changes were observed in-situ in both Raman and UV–vis-Nir spectra of S@SWCNTs. The optical response was found to depend on the magnitude and sign of the charge, as well as on the duration of the electrochemical charging process at a given potential. The enhanced Raman modes of sulfur chains exhibited a notable linear shift (up to 10 cm-1) accompanied by a redistribution of their intensities. A correlation is identified of the chronoamperometry curve (charging current versus time) and transformations of the Raman spectrum of single-atom sulfur chains. Atomistic simulations allowed to attribute these changes in the Raman spectrum to the softening of the sulfur bonds upon charging. Our findings revealed that the nanotube inhibits the chemical interactions between encapsulated sulfur and local charge sources, thus rendering S@SWCNTs suitable for repeated utilization in local charge analysis.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":null,"pages":null},"PeriodicalIF":10.5,"publicationDate":"2024-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142655834","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The quantum mechanical origin of the supercapacitance phenomenon in reduced graphene oxide structures","authors":"Thamyres F.M. Moreira,&nbsp;Edgar F. Pinzón,&nbsp;Adriano dos Santos,&nbsp;Laís C. Lopes,&nbsp;Paulo R. Bueno","doi":"10.1016/j.carbon.2024.119736","DOIUrl":"10.1016/j.carbon.2024.119736","url":null,"abstract":"<div><div>We investigated supercapacitance phenomena observed in reduced graphene oxide structures from a quantum mechanical rate viewpoint. The supercapacitance phenomenon in carbonaceous materials has been majorly attributed to electrostatic capacitance contributions, in which the magnitude of this capacitance is correlated with the amount of surface area available to be charged under the presence of electric potential perturbations. Nonetheless, the quantum rate theory predicts a superposition between electrostatic <span><math><msub><mrow><mi>C</mi></mrow><mrow><mi>e</mi></mrow></msub></math></span> and chemical <span><math><msub><mrow><mi>C</mi></mrow><mrow><mi>q</mi></mrow></msub></math></span> (also called quantum) capacitance energetic levels. The superposition of these capacitive states implies that the electric potential perturbation not only drives the separation of charges in space (thus correlating with the geometry of the capacitor and consequently with the surface area) but also governs the occupancy of the electric-field screened electronic structure of reduced graphene oxide embedded in the electrolyte environment. This leads to an energy degeneracy between electrostatic <span><math><mrow><msup><mrow><mi>e</mi></mrow><mrow><mn>2</mn></mrow></msup><mo>/</mo><msub><mrow><mi>C</mi></mrow><mrow><mi>q</mi></mrow></msub></mrow></math></span> and quantum <span><math><mrow><msup><mrow><mi>e</mi></mrow><mrow><mn>2</mn></mrow></msup><mo>/</mo><msub><mrow><mi>C</mi></mrow><mrow><mi>q</mi></mrow></msub></mrow></math></span> capacitive energy states, as confirmed in this work for reduced graphene oxide carbonaceous structures. Accordingly, the analysis proves that the charge dynamics associated with the resistance for charging the pseudo-capacitive <span><math><mrow><mi>E</mi><mo>=</mo><msup><mrow><mi>e</mi></mrow><mrow><mn>2</mn></mrow></msup><mo>/</mo><msub><mrow><mi>C</mi></mrow><mrow><mi>q</mi></mrow></msub></mrow></math></span> states of reduced graphene oxide structure follows a quantum resistance limit <span><math><mrow><msub><mrow><mi>R</mi></mrow><mrow><mi>K</mi></mrow></msub><mo>=</mo><mi>h</mi><mo>/</mo><msup><mrow><mi>e</mi></mrow><mrow><mn>2</mn></mrow></msup><mo>∼</mo><mn>25</mn><mo>.</mo><mn>8</mn></mrow></math></span> k<span><math><mi>Ω</mi></math></span> within a charging frequency of <span><math><mrow><mi>ν</mi><mo>=</mo><mn>1</mn><mo>/</mo><msub><mrow><mi>R</mi></mrow><mrow><mi>K</mi></mrow></msub><msub><mrow><mi>C</mi></mrow><mrow><mi>q</mi></mrow></msub><mo>=</mo><mi>E</mi><mo>/</mo><mi>h</mi><mo>=</mo><msup><mrow><mi>e</mi></mrow><mrow><mn>2</mn></mrow></msup><mo>/</mo><mi>h</mi><msub><mrow><mi>C</mi></mrow><mrow><mi>q</mi></mrow></msub></mrow></math></span> that obeys quantum electrodynamics principles, in agreement with the premises of the quantum rate theory. Two energy levels associated with the occupancy of the electronic states upon the reduction of graphene oxide were identified.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":null,"pages":null},"PeriodicalIF":10.5,"publicationDate":"2024-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142656261","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"In-situ grown NiFeLDH nanosheets over nitrogen rich amorphous carbon nanotubes: An electrochemical sensing platform for the detection of depression biomarker","authors":"Narmatha Sivaraman ,&nbsp;Rithanya Kanagaraj ,&nbsp;Rangasamy Thangamuthu","doi":"10.1016/j.carbon.2024.119807","DOIUrl":"10.1016/j.carbon.2024.119807","url":null,"abstract":"<div><div>In this work, intrinsic conductivity mismatch of NiFe layered double hydroxide (NFL) catalysts and agglomeration of nanosheets were addressed by introducing N doped carbon nanotubes (NCNTs) which improves catalytic activity. Using a one-step wet chemical process, CNT-supported NiFeLDH nanosheets (NFL/NCNT_x, x = 20, 50 and 100) were effectively created. This work delves into the lower level sensitive electrochemical detection of serotonin (5-HT) by utilizing synergy of CNT and LDH. The modified NFL/NCNT exhibits better electrochemical activity, appreciable sensitivity and spanned a concentration range of 0.01–400 μM with detection limit stood at 1.2 nM due to the plethora of electrochemical active surface area, remarkable conductivity and appreciable stability. Impressively, 96.0–96.8 % and 96.7–97.2 % recovery rates achieved in human urine and serum samples were well close to HPLC data, signifying its feasibility for real-time monitoring. The operational stability of the proposed sensor retained up to 89.13 % for 6 weeks. The present study highlights that tailoring NFL-NCNT heterojunction is an important strategy for the development of active and stable sensing platform.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":null,"pages":null},"PeriodicalIF":10.5,"publicationDate":"2024-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142655841","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}