Diamond and Related Materials最新文献_第6页

Mechanism of transition metal atoms etching the diamond (111) surface: From physisorption to graphitization 过渡金属原子腐蚀金刚石（111）表面的机理：从物理吸附到石墨化

IF 5.1 3区材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS

Diamond and Related Materials

Pub Date : 2025-12-30 DOI: 10.1016/j.diamond.2025.113271

Jie Zhao , Chenwei Dai , Qing Miao , Zhen Yin , Ming Zhang , Jiajia Chen

Polishing diamond with transition metal can significantly improve the processing efficiency and surface quality, but the lack of in-depth analysis from micro aspect limits the application and promotion of diamond. Different from the conventional approach of determining metal atom adsorption sites by calculating adsorption energy, this study employs a multi-scale simulation method combining first-principles calculations and classical molecular dynamics, integrated with the Monte Carlo annealing algorithm, to systematically investigate the adsorption configurations, adsorption behaviors, and etching mechanisms of six transition metal atoms (Fe, Co, Cu, Ni, Ti, Cr) on the diamond (111) surface. The results show that the six transition metal atoms are first spontaneously physically adsorbed to the hollow site directly above the six-membered carbon ring under the synergistic effects of van der Waals forces and electrostatic forces, which is followed by chemical adsorption. The chemisorption energy for the six atoms on the diamond (111) surface is −7.23 eV (Ti), −6.21 eV (Cr), −3.92 eV (Fe), −3.76 eV (Co), −3.65 eV (Ni) and −2.47 eV (Cu). During this process, the atoms undergo electron transfer with surrounding carbon atoms and form stable new chemical bonds, resulting in a significant decrease in the bond strength and breakage energy barrier of some interlayer CC bonds in the first bilayer-structure, which are further weakened by high temperature until the interlayer CC bonds are completely cleaved. Carbon atoms and carbon clusters in the free-state will be generated during continuous etching, and finally graphitization occurs. The findings would further elucidate the interface reaction mechanism between diamond and transition metals, which has important guiding significance for realizing high-quality and high-efficient machining of diamond materials.

用过渡金属对金刚石进行抛光处理，可以显著提高加工效率和表面质量，但缺乏从微观层面的深入分析，限制了金刚石的应用和推广。与传统通过计算吸附能确定金属原子吸附位置的方法不同，本研究采用第一性原理计算与经典分子动力学相结合的多尺度模拟方法，结合蒙特卡罗退火算法，系统研究了六种过渡金属原子（Fe, Co, Cu, Ni, Ti, Cr）在金刚石（111）表面的吸附构型、吸附行为和刻蚀机理。结果表明：在范德华力和静电力的协同作用下，6个过渡金属原子首先自发地物理吸附到六元碳环正上方的空心位置，然后进行化学吸附；6个原子在金刚石（111）表面的化学吸附能分别为−7.23 eV （Ti）、−6.21 eV （Cr）、−3.92 eV （Fe）、−3.76 eV （Co）、−3.65 eV （Ni）和−2.47 eV （Cu）。在此过程中，原子与周围碳原子发生电子转移，形成稳定的新化学键，导致第一层双层结构中部分层间CC键的键强度和断裂能垒显著降低，并在高温作用下进一步减弱，直至层间CC键完全断裂。在连续蚀刻过程中，会产生自由态的碳原子和碳团簇，最终发生石墨化。研究结果将进一步阐明金刚石与过渡金属之间的界面反应机理，对实现金刚石材料的高质量、高效率加工具有重要的指导意义。

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引用次数: 0

Cathodoluminescence of n-type diamond films grown by hot-filament chemical vapor deposition: Effects of hydrogen concentration 热丝化学气相沉积n型金刚石薄膜阴极发光：氢浓度的影响

IF 5.1 3区材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS

Diamond and Related Materials

Pub Date : 2025-12-29 DOI: 10.1016/j.diamond.2025.113264

Yūki Katamune , Satoshi Inoshita , Akira Izumi , Kenji Watanabe , Tokuyuki Teraji , Satoshi Koizumi

n-Type diamond semiconductors can be fabricated by phosphorus doping via chemical vapor deposition (CVD), which is a crucial process for advancing diamond-based electronic and quantum technologies. Among various CVD techniques, hot-filament CVD is a promising method for producing n-type diamond, particularly for heavy doping, due to its simplicity and scalability. To effectively utilize this method, a comprehensive understanding of the resulting crystal quality and impurity behavior is required. In this study, we performed the epitaxial growth of n-type diamond films with phosphorus concentrations on the order of 10¹⁸ cm⁻³ by hot-filament CVD and characterized their crystal quality and phosphorus donor states through cathodoluminescence (CL) analysis. Hall effect measurements confirmed n-type conductivity of the films regardless of hydrogen concentrations (~10¹⁸ and ~10¹⁹ cm⁻³). CL analysis revealed that the films exhibited luminescence from excitons bound to phosphorus donors in the near-band-edge region, indicating the formation of high-quality n-type diamond. Notably, the film with high hydrogen concentrations (~10¹⁹ cm⁻³) exhibited a spectral shift of exciton peaks toward lower photon energies along with the disappearance of fine structures, and the emergence of band-A emission in the visible-light region. These findings suggest that a large number of hydrogen atoms are associated with crystal defects and do not fully inactivate phosphorus donors.

磷掺杂化学气相沉积（CVD）技术可以制备n型金刚石半导体，这是推进基于金刚石的电子和量子技术的关键工艺。在各种化学气相沉积技术中，热丝化学气相沉积因其简单和可扩展性而成为制备n型金刚石，特别是重掺杂金刚石的一种很有前途的方法。为了有效地利用这种方法，需要对所得晶体质量和杂质行为有全面的了解。在本研究中，我们采用热丝CVD法对磷浓度为1018 cm−3的n型金刚石薄膜进行了外延生长，并通过阴极发光（CL）分析表征了其晶体质量和磷供体态。霍尔效应测量证实，无论氢浓度（~1018和~1019 cm−3）如何，薄膜都具有n型电导率。CL分析表明，薄膜在近带边缘区域显示出与磷供体结合的激子发光，表明形成了高质量的n型金刚石。值得注意的是，在高氢浓度（~1019 cm−3）的薄膜中，随着精细结构的消失，激子峰的光谱向较低光子能量方向移动，并且在可见光区出现了带a发射。这些发现表明，大量的氢原子与晶体缺陷有关，并不能完全灭活磷供体。

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引用次数: 0

Ultra-safe synthesis of Mo2CTx MXene as anode for lithium-ion battery 锂离子电池负极Mo2CTx MXene的超安全合成

IF 5.1 3区材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS

Diamond and Related Materials

Pub Date : 2025-12-29 DOI: 10.1016/j.diamond.2025.113276

Yitong Guo , Chenxiao Wang , Xianju Shi , Yanhuan Chen , Lifang Wang , Yanan Liu , Yuqian Wang , Xiaoning Wang , Yukai Chang , Aiguo Zhou

In this paper, a green and efficient low-concentration ammonium fluoride etching strategy is developed for the synthesis of two-dimensional highly pure Mo₂CT_x MXene. Using the Mo₂Ga₂C MAX phase as the precursor, highly pure Mo₂CT_x MXene was prepared via hydrothermal etching with a 1 M NH₄F aqueous solution at 160 °C for 12 h. By employing a slow-release fluorine source mechanism, the NH₄F concentration was maintained at 1 M, significantly reducing toxicity risks and improving operational safety while providing a safe pathway for large-scale MXene production. The structural characterization of the material revealed that the as-prepared Mo₂CT_x MXene exhibits a typical two-dimensional layered structure, with microscopic morphology and crystal parameters consistent with those obtained by conventional etching methods. As an anode material for lithium-ion batteries, the Mo₂CT_x MXene delivered an initial discharge specific capacity of 873.5 mAh g⁻¹ at a current density of 0.05 A g⁻¹, and retained 33.7 mAh g⁻¹ after 100th cycles of high-rate cycling at 0.5 A g⁻¹. This represents the first application of a low-concentration NH₄F etching system for preparing Mo₂CT_x MXene. The findings of this study not only enhance the safety of MXene synthesis but also provide new research directions for the development of green synthesis processes for Mo₂CT_x MXene.

本文提出了一种绿色高效的低浓度氟化铵蚀刻工艺，用于合成二维高纯Mo2CTx MXene。以Mo2Ga2C MAX相为前驱体，用1 M NH4F水溶液在160℃下水热刻蚀法制备了高纯Mo2CTx MXene。采用氟源缓释机制，将NH4F浓度维持在1 M，显著降低了毒性风险，提高了操作安全性，同时为大规模生产MXene提供了安全途径。材料的结构表征表明，制备的Mo2CTx MXene具有典型的二维层状结构，微观形貌和晶体参数与传统刻蚀方法一致。作为锂离子电池的负极材料，Mo2CTx MXene在0.05 a g−1电流密度下的初始放电比容量为873.5 mAh g−1，在0.5 a g−1高倍率循环100次后仍保持33.7 mAh g−1。这代表了低浓度NH4F蚀刻系统在制备Mo2CTx MXene中的首次应用。本研究结果不仅提高了MXene合成的安全性，而且为Mo2CTx MXene绿色合成工艺的发展提供了新的研究方向。

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引用次数: 0

Y(III) extraction from synthesized solution using a novel, eco-friendly, reusable, super-nanoadsorbent 利用一种新型、环保、可重复使用的超纳米吸附剂从合成溶液中提取Y（III）

IF 5.1 3区材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS

Diamond and Related Materials

Pub Date : 2025-12-29 DOI: 10.1016/j.diamond.2025.113272

Mahdi Gharabaghi , Abolfazl Ahadi , Hadi Abdollahi , Ali Altaee , Amir Keshtgar , Mahmod Tamadoni Saray , Masoud Zahiri , Adel Taheri , Mostafa Chegini

This paper presents the synthesis and application of novel functionalized graphene oxide nanostructures (CGD) for extraction and environmental applications. The CGD adsorbent was synthesized by deposition of graphene oxide (GO) onto a carbon fabric and modifying the GO surface with D2EHPA. Comprehensive characterization techniques, such as FE-SEM, XRD, Raman spectroscopy, and FT-IR, were employed to analyze the CGD adsorbent. Under optimum conditions (pH 6, 25 °C, 100 mg L⁻¹ initial Y(III) concentration, 1 cm² CGD dose, 155 rpm agitation, and 120 min contact time), the nanoadsorbent exhibited a maximum Y(III) adsorption capacity of 666.7 mg g⁻¹, fitting the Langmuir isotherm model (R² ≈ 0.99; χ² = 2.17). Kinetic data were best described by the pseudo-second-order model (R² ≈ 0.99; χ² = 1.03), indicating chemisorption-driven uptake. Thermodynamic analysis (ΔH = +9.23 kJ mol⁻¹, ΔS = +0.04 kJ mol⁻¹ K⁻¹, and negative ΔG values across all tested temperatures) confirmed that adsorption was endothermic, spontaneous, and accompanied by increased interfacial disorder. The CGD material retained 73.4 % of its adsorption capacity after four adsorption–desorption cycles, demonstrating its potential for sustainable Y(III) extraction and wastewater purification.

本文介绍了新型功能化氧化石墨烯纳米结构（CGD）的合成及其在萃取和环境方面的应用。将氧化石墨烯（GO）沉积在碳织物上，并用D2EHPA对其表面进行改性，制备了CGD吸附剂。采用FE-SEM、XRD、拉曼光谱、FT-IR等综合表征技术对CGD吸附剂进行了分析。在最佳条件下（pH 6, 25°C，初始Y（III）浓度100 mg L−1，CGD剂量1 cm2，搅拌155 rpm，接触时间120 min），纳米吸附剂对Y（III）的最大吸附量为666.7 mg g−1，符合Langmuir等温模型（R2≈0.99;χ2 = 2.17）。动力学数据用拟二阶模型（R2≈0.99;χ2 = 1.03）描述最好，表明化学吸收驱动摄取。热力学分析（ΔH = +9.23 kJ mol−1，ΔS = +0.04 kJ mol−1 K−1，在所有测试温度下均为负ΔG值）证实吸附是吸热的、自发的，并且伴随着界面紊乱的增加。经过4次吸附-解吸循环后，CGD材料仍保持了73.4%的吸附量，表明其具有可持续Y（III）提取和废水净化的潜力。

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引用次数: 0

Sensitive detection of gamma radiation through PL quenching of nitrogen doped graphene quantum dots 通过PL猝灭氮掺杂石墨烯量子点的伽马辐射灵敏检测

IF 5.1 3区材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS

Diamond and Related Materials

Pub Date : 2025-12-29 DOI: 10.1016/j.diamond.2025.113268

Elsa Susan Zachariah , Josmi John , Vidhya Vijayan , Pristin Thomas Kuruvilla , Vinoy Thomas , I. Rejeena

This work presents the design and development of a novel radiation sensing system based on nitrogen-doped graphene quantum dots (NGQD) integrated into the conventional Fricke solution. This hybrid system leverages the synergistic properties of NGQD and the well-established redox chemistry of the Fricke dosimeter to enhance the sensitivity, stability, and detection limits of gamma radiation sensing. The oxidation of Fe²⁺ in the Fricke solution to Fe³⁺ upon Gamma irradiation leads to static quenching of the photoluminescence (PL) of NGQD. The PL quenching of the system is dose-dependent and hence can act as a sensitive and efficient quantitative gamma sensor. According to the available literature, this is the first demonstration of incorporating NGQD into a Fricke-type system to enable photoluminescent response to gamma irradiation, offering a new paradigm in hybrid nanomaterial-assisted radiation sensing. The hybrid system demonstrates superior sensitivity in the microgray (μGy⁻¹) range, representing, to the best of our knowledge, the highest sensitivity reported to date for a Fricke-based, nanomaterial-assisted gamma radiation sensor. These findings establish the NGQD–Fricke solution as a promising platform for the design of next-generation nanomaterial-based radiation sensors.

本研究提出了一种基于氮掺杂石墨烯量子点（NGQD）的新型辐射传感系统的设计和开发，该系统集成到传统的Fricke解决方案中。该混合系统利用NGQD的协同特性和Fricke剂量计成熟的氧化还原化学特性来提高伽马辐射传感的灵敏度、稳定性和检测极限。在伽马辐射作用下，Fricke溶液中的Fe2+氧化为Fe3+，导致NGQD的光致发光（PL）发生静态猝灭。该系统的PL猝灭是剂量依赖的，因此可以作为一个敏感和有效的定量伽马传感器。根据现有文献，这是首次将NGQD结合到fricke型系统中，以实现对伽马辐射的光致发光响应，为混合纳米材料辅助辐射传感提供了新的范例。该混合系统在微灰度（μGy−1）范围内表现出优越的灵敏度，据我们所知，这是迄今为止基于fricke的纳米材料辅助伽马辐射传感器的最高灵敏度。这些发现使NGQD-Fricke解决方案成为设计下一代纳米材料辐射传感器的一个有前途的平台。

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引用次数: 0

Lung cancer detection by circular dichroism of single layered anisotropic metasurfaces 单层各向异性超表面圆二色性检测肺癌

IF 5.1 3区材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS

Diamond and Related Materials

Pub Date : 2025-12-29 DOI: 10.1016/j.diamond.2025.113269

Priyanka Das

In this work, two types of ultrathin anisotropic metasurfaces have been designed for conducting asymmetric reflection and transmission of incident waves. Linearly polarized incident waves undergo asymmetric reflection while circularly polarized incident waves undergo circular dichroism due to diagonal asymmetry in the geometry. The circular dichroism of the proposed asymmetric reflective and transmissive metasurfaces is leveraged to detect the presence of tumours in lung tissue. Circular dichroism in healthy and cancerous lungs is observed when the two types of metasurfaces are placed above the lungs phantom. Simulations of reflection characteristics for the location of tumour at different locations yield circular dichroism at different frequencies. The reflective metasurface structure is modified with slots in the T-shaped structures to accommodate graphene strips in the slots for introducing tunability in circular dichroism from 0 to 1 eV. The transmissive type chiral metasurface is investigated for exhibiting circular dichroism and asymmetric transmission under the condition of incidence of circularly polarized waves and linearly polarized waves respectively. A neural network model is used to train the numerically simulated data and test on reflection characteristics for determining the location of lungs tumour. Support Vector Machine (SVM) with a Gaussian Kernel has been used to detect whether the lungs is healthy or cancerous. The XGradient-Boost model has been used to identify the graphene potential at which the predicted circular dichroism is highest. F1-score and sensitivity are obtained as 0.9547 and 0.9485, respectively. Specificity is 0.9323 and model accuracy is 94.26 %.

在这项工作中，设计了两种超薄各向异性超表面来进行入射波的不对称反射和透射。线偏振入射波发生不对称反射，而圆偏振入射波由于几何上的对角线不对称而发生圆二色性。提出的不对称反射和透射超表面的圆二色性被用来检测肺组织中肿瘤的存在。当将两种超表面置于肺幻膜上方时，可观察到健康肺和癌肺的圆二色性。对不同位置肿瘤位置的反射特性的模拟在不同频率下产生圆二色性。该反射超表面结构被修改为在t形结构中加入凹槽，以容纳凹槽中的石墨烯条，从而引入从0到1 eV的圆二色性可调性。研究了透射型手性超表面在圆极化波入射和线极化波入射条件下分别表现出圆二色性和不对称透射性。利用神经网络模型对数值模拟数据进行训练，并对反射特性进行测试，以确定肺部肿瘤的位置。具有高斯核的支持向量机（SVM）已被用于检测肺部是健康还是癌变。XGradient-Boost模型已被用于确定预测的圆二色性最高的石墨烯电位。f1评分为0.9547，灵敏度为0.9485。特异性为0.9323，模型准确率为94.26%。

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引用次数: 0

Multiscale simulation of pesticides adsorption on passivated carbon nanotubes 钝化碳纳米管对农药吸附的多尺度模拟

IF 5.1 3区材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS

Diamond and Related Materials

Pub Date : 2025-12-29 DOI: 10.1016/j.diamond.2025.113279

Riddhi Sainda , Sourav Kanti Jana , Prafulla K. Jha

The extensive use of pesticides poses a critical threat to water quality and public health, demanding efficient remediation strategies. Here, we examine the adsorption of atrazine, carbetamide, and glyphosate on chlorine-passivated (Cl-CNT) and hydrogen-passivated carbon nanotubes (H-CNT) through density functional theory (DFT) and classical molecular dynamics (MD) simulations. DFT analyses reveal that the passivation enhances CNT stability and reactivity, with atrazine showing the strongest affinity toward H-CNT via π–π stacking, glyphosate preferentially binding to Cl-CNT through polar interactions, and carbetamide displaying moderate adsorption on both. These results confirm that the H-CNT offers a balanced adsorption profile toward the pesticides with superior stability over Cl-CNT. To gain deeper insight, we have performed large-scale classical MD simulations, enabling us to capture the dynamic interactions of H-CNT with mixed pesticides under realistic aqueous conditions at room temperature and atmospheric pressure. Free-energy and structural analyses revealed that van der Waals interactions serve as the primary driving force for adsorption, further modulated by hydrogen bonding and electrostatic interactions. Additionally, RMSD and MSD analyses provide critical insights into the stability of H-CNT–pesticide complexes and the diffusion behavior of pesticide molecules in the presence of water and CNTs. These findings establish H-CNT as a promising candidate for selective pesticide removal in water treatment applications.

农药的广泛使用对水质和公众健康构成严重威胁，需要有效的补救战略。在这里，我们通过密度泛函理论（DFT）和经典分子动力学（MD）模拟研究了阿特拉津、卡贝酰胺和草甘膦在氯钝化（Cl-CNT）和氢钝化碳纳米管（H-CNT）上的吸附。DFT分析表明，钝化处理增强了碳纳米管的稳定性和反应活性，其中阿特拉津通过π -π堆叠对h -碳纳米管表现出最强的亲和力，草甘膦通过极性相互作用优先与cl -碳纳米管结合，而卡贝酰胺在两者上均表现出适度的吸附。这些结果证实了H-CNT对农药具有平衡的吸附特征，比Cl-CNT具有更好的稳定性。为了获得更深入的了解，我们进行了大规模的经典MD模拟，使我们能够在室温和常压下的现实水条件下捕捉h -碳纳米管与混合农药的动态相互作用。自由能和结构分析表明，范德华相互作用是吸附的主要驱动力，并进一步受到氢键和静电相互作用的调节。此外，RMSD和MSD分析为h -碳纳米管-农药配合物的稳定性和农药分子在水和碳纳米管存在下的扩散行为提供了重要的见解。这些发现确立了H-CNT作为水处理应用中选择性去除农药的有希望的候选者。

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引用次数: 0

An innovative time-efficient solution combustion approach for one-step synthesis of magnetite/carbon black composite powder with comprehensive thermodynamic exploration 磁铁矿/炭黑复合粉体一步合成的创新高效溶液燃烧方法及综合热力学探索

IF 5.1 3区材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS

Diamond and Related Materials

Pub Date : 2025-12-29 DOI: 10.1016/j.diamond.2025.113270

Fatemeh Najarnia , Samaneh Sahebian , Jalil Vahdati Khaki

Magnetic–dielectric materials are increasingly important for advanced applications due to their multifunctional behavior. Among them, the Fe₃O₄/carbon black (CB) hybrid is notable for the synergistic combination between Fe₃O₄ magnetic properties and carbon black dielectric characteristics. To overcome the limitations of conventional synthesis routes, which are often slow, complex, and costly, this study introduces an efficient solution combustion synthesis-based method for producing Fe₃O₄/CB hybrids. The reaction's feasibility was examined by varying the amount of carbon black. Acid-washing analysis revealed coated carbon black values ranging from 0.34 to 0.82, with the highest at Fe₃O₄-40CB. Thermodynamic assessments showed that adding up to 40 wt% CB enhances reaction intensity and supports stable self-sustained synthesis, while higher amounts destabilize the reaction front. At ≥60 wt%CB, dilution hinders ignition. XRD results indicated that carbon black additions up to 30 wt% produce a mixed Fe₃O₄/FeO phase, whereas 40–50 wt% carbon black yields nearly pure magnetite. Magnetic measurements demonstrated that Fe₃O₄-40CB achieves a saturation magnetization of 33.40 emu/g, suitable for a carbon-coated hybrid structure. Morphological analyses (FESEM and TEM) confirmed a porous magnetite structure uniformly coated with carbon black nanoparticles. Raman spectroscopy further supported carbon black coating, with the ID/IG ratio increasing from 0.83 in primary carbon black to 2.53 in Fe₃O₄-40CB, indicating the formation of amorphous carbon black associated with the explosive SCS process. The results demonstrate the effectiveness of the proposed method for preparing Fe₃O₄/carbon black hybrid while addressing the challenges of time, complexity and cost.

磁介质材料由于其多功能特性，在先进应用中越来越重要。其中，Fe3O4/炭黑（CB）杂化材料中Fe3O4磁性能与炭黑介电特性的协同结合最为显著。为了克服传统合成路线缓慢、复杂和昂贵的局限性，本研究介绍了一种基于溶液燃烧合成的高效制备Fe3O4/CB杂化物的方法。通过改变炭黑的量来检验反应的可行性。酸洗分析显示，涂层炭黑值在0.34 ~ 0.82之间，其中Fe3O4-40CB最高。热力学评估表明，添加40 wt%的CB可增强反应强度并支持稳定的自维持合成，而添加更多的CB则会使反应前端不稳定。在≥60wt %CB时，稀释会阻碍着火。XRD结果表明，炭黑添加量达到30 wt%时生成Fe3O4/FeO混合相，而40 wt%至50 wt%的炭黑则生成接近纯磁铁矿。磁性测试表明，Fe3O4-40CB的饱和磁化强度为33.40 emu/g，适合于碳包覆杂化结构。形态学分析（FESEM和TEM）证实了多孔磁铁矿结构均匀地包裹着炭黑纳米颗粒。Raman光谱进一步支持了炭黑涂层，其ID/IG比值从原炭黑的0.83增加到Fe3O4-40CB的2.53，表明非晶炭黑的形成与爆炸SCS过程有关。实验结果证明了该方法制备Fe3O4/炭黑杂化材料的有效性，同时解决了时间、复杂性和成本方面的挑战。

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引用次数: 0

Structural accuracy control of ion beam angled etching of diamond in Ar/O2 gas mixture: Formation mechanism considering the lateral Erosion of aluminum mask Ar/O2混合气体中离子束角度刻蚀金刚石的结构精度控制：考虑铝掩膜侧蚀的形成机理

IF 5.1 3区材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS

Diamond and Related Materials

Pub Date : 2025-12-29 DOI: 10.1016/j.diamond.2025.113275

Yuqingyun Du , Xiaoyang Wen , Ziqi Xiao , Xianshan Dong , Junfeng Xiao , Xuefang Wang , Jianfeng Xu , Lingqi Feng , Zhenyang Shi , Xiao Huang

In this work, experiments of ion beam angled etching (IBAE) of single-crystal diamond were conducted utilizing a gas mixture consisting of argon and oxygen. Angled etching is a technique distinct from conventional top-down etching, which enables the fabrication of special structures by tilting the sample stage at a certain angle. For the special structure with inverted cone angle applicable in optical areas, conventional ion beam etching (IBE) fails to satisfy the requisite etching selectivity and etch diamond efficiently. Reactive ion beam angled etching (RIBAE) using pure oxygen for diamond etching can result in electrode oxidation, thereby impairing the discharge process and even interrupting etching with insufficient power. Therefore, experiments of IBAE with different parameters were conducted utilizing aluminum as the mask in this work, fabricating the characteristic structures influenced by lateral erosion of the mask within the mixture composed of 80 % argon and 20 % oxygen. Subsequently, the IBAE process is modeled and simulated to analyze the characteristic structures and to understand the formation mechanisms. The simulation demonstrates how different experimental parameters affect the errors between the results and the design, which reveals the relation between the optimal tilt angle and the selection ratio of surface binding energy corresponding to the etch selectivity.

本文利用氩气和氧气的混合气体进行了单晶金刚石离子束角刻蚀实验。角度蚀刻是一种不同于传统的自顶向下蚀刻的技术，它可以通过将样品台倾斜一定角度来制造特殊结构。对于光学领域中具有倒锥角的特殊结构，传统的离子束刻蚀（IBE）不能满足所要求的刻蚀选择性和高效刻蚀金刚石。使用纯氧进行金刚石刻蚀的反应离子束角刻蚀（RIBAE）会导致电极氧化，从而影响放电过程，甚至在功率不足的情况下中断刻蚀。因此，本研究以铝为掩膜进行了不同参数的IBAE实验，在80%氩气和20%氧气的混合物中制备了掩膜受横向侵蚀影响的特征结构。随后，对IBAE过程进行了建模和仿真，以分析其特征结构，了解其形成机制。仿真分析了不同实验参数对实验结果与设计误差的影响，揭示了最佳倾斜角度与表面结合能选择比对应的蚀刻选择性之间的关系。

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引用次数: 0

Preparation of CNTs/AgNPs flexible conductive cotton fabrics via a co-impregnation one-bath reduction method and investigation of their electrothermal performance 共浸渍一浴还原法制备CNTs/AgNPs柔性导电棉织物及其电热性能研究

IF 5.1 3区材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS

Diamond and Related Materials

Pub Date : 2025-12-29 DOI: 10.1016/j.diamond.2025.113278

Liangyu Wang , Yuwen Bao , Mengrong Fan , Caijiao Yu , Xiaohong Gao

To develop lightweight smart textiles with electrothermal functionality, this study employed the impregnation-reduction method to efficiently combine carbon nanotubes (CNTs), silver nanoparticles (AgNPs), and cotton fabrics, constructing CNTs/AgNPs/Cotton with a 3D conductive network structure. With the sheet resistance (Rs) of the fabric as the evaluation index, the optimal preparation process was determined via single-factor analysis and orthogonal experimental design. The prepared CNTs/AgNPs/Cotton maintained good electrical conductivity after washing and friction conditions, as well as under stretching and twisting conditions. It exhibited rapid surface temperature regulation under a rated voltage of 1–11 V, and exhibited excellent durability, flexibility, and electrothermal performance. Furthermore, when a rated voltage of 5 V was applied, the temperature remained stable within 1800 s and maintained uniform heat distribution under bending, stretching, and twisting conditions. These findings suggest that CNTs/AgNPs/Cotton has strong potential for applications in personal thermal management, physical thermotherapy, and flexible wearable electronics.

为了开发具有电热功能的轻质智能纺织品，本研究采用浸渍还原法将碳纳米管（CNTs）、银纳米粒子（AgNPs）和棉织物高效结合，构建了具有三维导电网络结构的CNTs/AgNPs/棉花。以织物的抗片阻力（Rs）为评价指标，通过单因素分析和正交试验设计确定最佳制备工艺。制备的CNTs/AgNPs/Cotton在洗涤、摩擦、拉伸、扭转等条件下均保持良好的导电性。在1-11 V的额定电压下，它具有快速的表面温度调节，并具有优异的耐用性、柔韧性和电热性能。当额定电压为5 V时，在弯曲、拉伸和扭转条件下，温度在1800 s内保持稳定，热分布均匀。这些发现表明，CNTs/AgNPs/Cotton在个人热管理、物理热治疗和柔性可穿戴电子产品方面具有巨大的应用潜力。

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