Carbon Trends最新文献_第9页

Deposition of nanocomposite carbon-based thin films doped with copper and fluorine 掺杂铜和氟的碳基纳米复合薄膜的沉积

IF 3.1

Carbon Trends Pub Date : 2024-10-28 DOI: 10.1016/j.cartre.2024.100416

R. Pribyl, S. Kelarova, M. Karkus, V. Bursikova

{"title":"Deposition of nanocomposite carbon-based thin films doped with copper and fluorine","authors":"R. Pribyl, S. Kelarova, M. Karkus, V. Bursikova","doi":"10.1016/j.cartre.2024.100416","DOIUrl":"10.1016/j.cartre.2024.100416","url":null,"abstract":"<div><div>This paper is focused on plasma-enhanced chemical vapor deposition (PECVD) of novel carbon-based thin films. Unique thin films were deposited from a mixture of methane, hydrogen, and a precursor containing fluorine and copper: (hfac)copperVTMS (hfac = hexafluoroacetylacetonato and VTMS = vinyltrimethylsilane). Using the (hfac)copperVTMS precursor in PECVD deposition results in the advantageous chemical composition of carbon-based thin films while maintaining sufficient mechanical properties. Furthermore, with optimized plasma parameters, the films deposited on the substrate exhibit a nanocomposite structure. This nanostructured surface can increase the surface area, which is beneficial for various applications, including antibacterial and antiviral properties. The radiofrequency glow discharge at low pressure (<span><math><mrow><mo>≈</mo><mn>70</mn><mi>Pa</mi></mrow></math></span>) and power <span><math><mrow><mi>P</mi><mo>=</mo><mn>25</mn><mi>W</mi></mrow></math></span> and <span><math><mrow><mi>P</mi><mo>=</mo><mn>250</mn><mi>W</mi></mrow></math></span> was used for deposition. Deposited thin films were analyzed using X-ray photoelectron spectroscopy, water contact angle measurement, atomic force microscopy, and nanoindentation techniques. Despite the doping of carbon-based thin films with soft copper, the prepared films exhibited sufficient mechanical properties, which are crucial for the future implementation of this deposition process.</div></div>","PeriodicalId":52629,"journal":{"name":"Carbon Trends","volume":"17 ","pages":"Article 100416"},"PeriodicalIF":3.1,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142652833","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Localized surface plasmon resonance induced nonlinear absorption and optical limiting activity of gold decorated graphene/MoS2 hybrid 金装饰石墨烯/MoS2 杂化物的局部表面等离子体共振诱导非线性吸收和光学极限活性

IF 3.1

Carbon Trends Pub Date : 2024-10-21 DOI: 10.1016/j.cartre.2024.100417

M. Abith, T.C. Sabari Girisun

{"title":"Localized surface plasmon resonance induced nonlinear absorption and optical limiting activity of gold decorated graphene/MoS2 hybrid","authors":"M. Abith, T.C. Sabari Girisun","doi":"10.1016/j.cartre.2024.100417","DOIUrl":"10.1016/j.cartre.2024.100417","url":null,"abstract":"<div><div>The synergistic supremacy of a hybrid nanocomposite made of reduced graphene oxide (rGO), molybdenum disulfide (MoS<sub>2</sub>) and gold nanoparticles (Au) for Q-switching and optical limiting applications is investigated. Hydrothermally synthesized Au-rGO-MoS<sub>2</sub> hybrid with varying concentrations of Au (2.5, 5, 7.5 and 10 wt%) was subjected to interact with Q-switched Nd:YAG nanosecond green laser pulses. The intensity dependent nonlinear absorption studies revealed a switch over in the nonlinear behaviour from saturable absorption (SA) to reverse saturable absorption (RSA) behaviour. SA occurs due to ground state bleaching at comparatively lower laser irradiances serving the need for Q-switching and optical communications. The RSA trait at higher laser irradiance is attributed to sequential two-photon absorption which serves as the platform for optical limiting behaviour prompting laser safety and effective photothermal therapy applications. The strong mid-visible and UV absorption promotes the availability of multiple energy bands for energy transitions of excited state absorption (ESA). Enhanced local fields due to localized surface plasmon resonance effect, structural defects, hierarchical morphology, increased absorption cross-section and plasmon induced energy transfer promotes robust ESA process. These tunable nonlinear optical properties make Au-rGO-MoS<sub>2</sub> hybrid promising futuristic candidates for applications in nonlinear photonic devices, ultrafast optical switches and all-optical signal processing systems.</div></div>","PeriodicalId":52629,"journal":{"name":"Carbon Trends","volume":"17 ","pages":"Article 100417"},"PeriodicalIF":3.1,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142530562","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhanced storage performance of a low-cost hard carbon derived from biomass 提高从生物质中提取的低成本硬碳的储存性能

IF 3.1

Carbon Trends Pub Date : 2024-10-19 DOI: 10.1016/j.cartre.2024.100415

Chen Wang , Debasis Sen , Vinod K. Aswal , Lan Weiguang , Palani Balaya

{"title":"Enhanced storage performance of a low-cost hard carbon derived from biomass","authors":"Chen Wang , Debasis Sen , Vinod K. Aswal , Lan Weiguang , Palani Balaya","doi":"10.1016/j.cartre.2024.100415","DOIUrl":"10.1016/j.cartre.2024.100415","url":null,"abstract":"<div><div>Hard Carbon is the most widely used negative electrode material for sodium-ion batteries today. Achieving high storage capacity and increasing the plateau capacity, as opposed to the sloping profile, are crucial for enhancing energy density of the full cells. While several publications address the synthesis of hard carbon, the economic viability for commercial scale-up hinges on the choice of precursors. In this study, we report the electrochemical properties of hard carbon derived from two biomass precursors, sugarcane waste (bagasse) and corn waste, and compare their performances with commercially available hard carbon. The hard carbon derived from bagasse delivers a capacity of 307 mAh/g at C/10 rate and retains approximately 234 mAh/g at 3C discharge rate. We integrate surface area, pore size distribution, Raman spectroscopy, small-angle X-ray and neutron scattering data to elucidate the sodium storage mechanism in these hard carbon samples. Correlated graphitic domains with hexagonal ordering along with fractal like agglomeration of the nanosheets are quantified. The high plateau capacity of the bagasse-derived hard carbon is attributed to the characteristic morphology and size distribution of the nanosheets and their nature of agglomeration.</div></div>","PeriodicalId":52629,"journal":{"name":"Carbon Trends","volume":"17 ","pages":"Article 100415"},"PeriodicalIF":3.1,"publicationDate":"2024-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142530561","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Nanoscale friction and wear of graphite surface in ambient and underwater conditions 石墨表面在环境和水下条件下的纳米级摩擦和磨损

IF 3.1

Carbon Trends Pub Date : 2024-10-13 DOI: 10.1016/j.cartre.2024.100414

Jitendra Soni , Zhijiang Ye , Nitya Nand Gosvami

{"title":"Nanoscale friction and wear of graphite surface in ambient and underwater conditions","authors":"Jitendra Soni , Zhijiang Ye , Nitya Nand Gosvami","doi":"10.1016/j.cartre.2024.100414","DOIUrl":"10.1016/j.cartre.2024.100414","url":null,"abstract":"<div><div>The tribological properties of graphite are extremely sensitive to surrounding environment, which affects its longevity and friction reduction performance. This study aims to develop a comprehensive understanding of the effects of a liquid environment on interactions at the sliding interface, thereby influencing the nanoscale tribological properties of graphite surfaces. By combining atomic force microscopy experiments and molecular dynamics simulations, we conducted a comparative analysis of friction and wear behavior of graphite under two different environmental conditions: ambient (air) and underwater condition. Our investigations explored both the step edge and interior (step-free) graphite surfaces. The experimental results revealed a notable contrast in the frictional and wear behavior of graphite at nanoscale in these two environments. The interior surface exhibited a friction coefficient (COF) of approximately 0.003 and 0.006 against a diamond-coated surface in ambient and underwater conditions, respectively. Interestingly, the underwater environment not only increased friction but also significantly compromised the wear resistance of graphene layers near the graphite surface compared to the ambient environment, as evidenced in both step edge and interior step-free regions. The interior region sustained up to ∼7400 nN load in ambient condition but failed at ∼1500 nN under water. Similarly, the step edge failed at ∼375 and ∼187.5 nN in ambient and underwater conditions, respectively. Our simulations revealed that the increased friction in underwater condition is due to resistance of surrounding water molecules during tip sliding. The presence of water at tip-graphite contact interface generated substantial localized stress, leading to the initiation of wear and revealing the pronounced effect of water on the wear characteristics of graphite in underwater condition.</div></div>","PeriodicalId":52629,"journal":{"name":"Carbon Trends","volume":"17 ","pages":"Article 100414"},"PeriodicalIF":3.1,"publicationDate":"2024-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142530559","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Structural, electronic and dielectric properties of carbon nanotubes interacting with Co nanoclusters 与 Co 纳米团簇相互作用的碳纳米管的结构、电子和介电特性

IF 3.1

Carbon Trends Pub Date : 2024-10-11 DOI: 10.1016/j.cartre.2024.100410

Icare Morrot-Woisard , Emile K. Nguyen , Nicolas Vukadinovic , Mauro Boero

引用次数: 0

The influence of carbon content to the band gap of ABC stacked trilayer hybridized graphene and hexagonal boron nitride 碳含量对 ABC 叠层三层杂化石墨烯和六方氮化硼带隙的影响

IF 3.1

Carbon Trends Pub Date : 2024-10-10 DOI: 10.1016/j.cartre.2024.100413

Lingyun Sun

引用次数: 0

Optical investigation of degradation of graphene oxide in alkaline environment: Evidence of two distinct photon-emitting phases in visible region. 碱性环境中氧化石墨烯降解的光学研究：可见光区域两种不同光子发射阶段的证据。

IF 3.1

Carbon Trends Pub Date : 2024-10-09 DOI: 10.1016/j.cartre.2024.100412

Emiliano Burresi , Maria Lucia Protopapa

{"title":"Optical investigation of degradation of graphene oxide in alkaline environment: Evidence of two distinct photon-emitting phases in visible region.","authors":"Emiliano Burresi , Maria Lucia Protopapa","doi":"10.1016/j.cartre.2024.100412","DOIUrl":"10.1016/j.cartre.2024.100412","url":null,"abstract":"<div><div>In this work we show a procedure of treating of the graphene oxide in alkaline environment as a function of the treatment time in order to obtain novel structures with strong luminescence properties, water-stable, useful as potential replacement for critical raw materials employed as example in optical and optoelectronic devices or for diagnostic and therapeutic technology. These structures have distinct blue and green-luminescence properties which derived most likely from different structural conformations, one associable with that of carbon quantum dots (or as an alternative to that of the Oxidative Debris), the other, lighter and more similar to organic compounds, reported in literature as fulvic-like molecules, but whose nature has to be further investigated. We show that the lighter fraction has a dual mechanism of photoemission: the excitation-independent PL for excitation wavelength within 350 nm and the excitation-dependent component for excitation wavelength ranging in the visible spectrum. The PL dual behaviour could depend on fluorescent nanoclusters composed by specific organic fluorophores with a carbonaceous core. FTIR analysis shows reasonably the same functional groups unless of some difference discussed in the text, meanwhile UV–Vis and PL analysis clearly highlight two distinct emissions (450 nm and 530 nm) in the visible region of the electromagnetic spectrum. Excitation-dependent photoluminescence, water stability and organic fluorescent nanostructures are issues particularly required for application in the biological field but also in materials science.</div></div>","PeriodicalId":52629,"journal":{"name":"Carbon Trends","volume":"17 ","pages":"Article 100412"},"PeriodicalIF":3.1,"publicationDate":"2024-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142433285","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Supramolecular interactions in graphene–chitosan composites with plasmonic nanoparticles 带有等离子纳米粒子的石墨烯-壳聚糖复合材料中的超分子相互作用

IF 3.1

Carbon Trends Pub Date : 2024-10-08 DOI: 10.1016/j.cartre.2024.100405

Sarah Briceño , Lorena Layana , Charlotte Berrezueta-Palacios , Lenin Andres Guerrero-León , Claudia Kroeckel , Duncan John Mowbray , Julio C. Chacón-Torres

{"title":"Supramolecular interactions in graphene–chitosan composites with plasmonic nanoparticles","authors":"Sarah Briceño , Lorena Layana , Charlotte Berrezueta-Palacios , Lenin Andres Guerrero-León , Claudia Kroeckel , Duncan John Mowbray , Julio C. Chacón-Torres","doi":"10.1016/j.cartre.2024.100405","DOIUrl":"10.1016/j.cartre.2024.100405","url":null,"abstract":"<div><div>The supramolecular interactions between graphene and biopolymers, such as chitosan, determine both whether nanostructured-hybrid materials are formed and their technologically relevant physical/chemical properties. However, there is still a fundamental lack of knowledge about how nanocomposites based on chitosan and graphene are formed, as well as their intrinsic structure and interaction with plasmonic nanoparticles. In this work, we provide an in-depth understanding of the supramolecular interactions between chitosan and graphene in the formation of graphene–chitosan nanocomposites with gold or silver nanoparticles. To do so, we employ a combination of Raman spectroscopy, Fourier-transformed infrared (FTIR) spectroscopy, atomic force microscopy (AFM), scanning electron microscopy (SEM), and X-ray photoelectron spectroscopy (XPS) measurements with density functional theory (DFT) calculations to reveal the mechanism and driving forces behind these supramolecular interactions between graphene and chitosan. Specifically, we show they are based on a charge transfer process derived from the protonation of the amine groups of chitosan in acidic media. The understanding of the supramolecular interaction between graphene and chitosan that we provide herein should prove of great importance and interest to the material sciences and biomedical engineering fields.</div></div>","PeriodicalId":52629,"journal":{"name":"Carbon Trends","volume":"17 ","pages":"Article 100405"},"PeriodicalIF":3.1,"publicationDate":"2024-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142530560","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Observation of novel carbon nanocorals during the synthesis of graphene and investigations on their composition, morphological and structural properties 在合成石墨烯过程中观察新型碳纳米珊瑚并研究其组成、形态和结构特性

IF 3.1

Carbon Trends Pub Date : 2024-10-06 DOI: 10.1016/j.cartre.2024.100411

Debashree Das , Girish M. Gouda , K.B. Jinesh

{"title":"Observation of novel carbon nanocorals during the synthesis of graphene and investigations on their composition, morphological and structural properties","authors":"Debashree Das , Girish M. Gouda , K.B. Jinesh","doi":"10.1016/j.cartre.2024.100411","DOIUrl":"10.1016/j.cartre.2024.100411","url":null,"abstract":"<div><div>Novel carbon nanocorals (CNCs) are observed during the synthesis of graphene on copper substrates by thermal chemical vapor deposition, using precursor gas acetylene (C<sub>2</sub>H<sub>2</sub>) and carrier gas argon (Ar). CNCs have unique structure and investigations are carried out on structural and elemental compositions by X-ray diffraction (XRD), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), X-ray excited Auger electron spectroscopy (XAES), energy dispersive X-ray spectroscopy (EDS), field emission scanning electron microscopy (FESEM), and high resolution transmission electron microscopy (HRTEM). The graphitic nature of the CNCs is evident from characteristic D, G, and 2D bands obtained from Raman spectrum. Elemental composition analysis by XPS shows presence of sp<sup>2</sup> and sp<sup>3</sup> hybridized carbon whereas XAES quantifies percentage of sp<sup>2</sup> and sp<sup>3</sup> hybridized carbon. FESEM micrographs show a uniform distribution of densely packed CNCs throughout the sample, and formation of groups of CNCs with distinct contours on the surface. The cross-sectional FESEM shows stacking of large number of graphene layers with dendrites. HRTEM analysis further supports observations of FESEM and elaborates structural morphology of the CNCs. Synthesis, characterization and analysis of the properties of carbon nanocorals are reported here, for the first time.</div></div>","PeriodicalId":52629,"journal":{"name":"Carbon Trends","volume":"17 ","pages":"Article 100411"},"PeriodicalIF":3.1,"publicationDate":"2024-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142417661","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Recent research trends in the rational design strategies of carbon-based electrocatalysts for electrochemical ammonia synthesis 用于电化学氨合成的碳基电催化剂合理设计策略的最新研究趋势

IF 3.1

Carbon Trends Pub Date : 2024-10-05 DOI: 10.1016/j.cartre.2024.100409

Hyojung Lim , Jinuk Choi , Euihyeon Hwang , Sathyanarayanan Shanmugapriya , Gnanaprakasam Janani , Subramani Surendran , Heechae Choi , Gibum Kwon , Kyoungsuk Jin , Uk Sim

引用次数: 0