Journal of Science: Advanced Materials and Devices最新文献_第7页

Electrospun Chlorella vulgaris/zein blended nanofibers with antioxidant activity 静电纺丝小球藻/玉米蛋白共混纳米纤维的抗氧化性能

IF 6.8 3区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Science: Advanced Materials and Devices

Pub Date : 2025-10-30 DOI: 10.1016/j.jsamd.2025.101036

Turgay Cetinkaya

Beadless bionanofibers were developed from blends containing 30 wt% and 40 wt% Chlorella vulgaris with 10 wt% zein powder (CV30 and CV40) via electrospinning. Thinner nanofibers were obtained from the CV30 blend (409.9 ± 130.7 nm) than from the CV40 blend (430.4 ± 148.6 nm). Brunauer–Emmett–Teller calculations revealed a higher porosity and a larger surface area for the CV40 nanofibers. Various binding mechanisms involving ester and carbonyl groups, π-π stacking, and π-anion interactions were discussed when the bioactive compounds from Chlorella vulgaris interacted with zein molecules. Higher DPPH radical scavenging activity (RSA) and ABTS reduction were observed for CV30 nanofibers compared to CV40 nanofibers at all tested concentrations. p-Coumaric acid (91.19–92.00 μg/mg) and ferulic acid (63.09–63.16 μg/mg) exhibited the highest concents among the polyphenols in the nanofibers. Compared with the powder, nanofibers had higher temperatures of maximum degradation, demonsantrating improved thermal performance. Covalent and peptide bonds broke above 250 °C. The transition zone temperature range 250–300 °C between Chlorella-zein was correspond to the interface between adjacent hydrogen-bonded molecular sheets. The specific interactions between Chlorella and zein lead to alterations in the crystalline phase and regions. Changes in two-theta intensities were attributed to hydrogen bonding between zein hydroxyl groups and Chlorella carboxyl or hydroxyl groups. Compherensive characterization revealed the synergistic potential of Chlorella-zein nanofibers as biomaterials and their potential applications in the development of reusable packaging, smart coatings, and self-cleaning surfaces.

以含有30wt %和40wt %的小球藻和10wt %的玉米蛋白粉（CV30和CV40）为原料，通过静电纺丝制备无珠生物纳米纤维。CV30共混物（409.9±130.7 nm）比CV40共混物（430.4±148.6 nm）获得更细的纳米纤维。brunauer - emmet - teller计算显示CV40纳米纤维具有更高的孔隙率和更大的表面积。探讨了普通小球藻活性物质与玉米蛋白分子相互作用时的酯基、羰基、π-π堆积、π-阴离子相互作用等多种结合机制。在所有测试浓度下，与CV40纳米纤维相比，CV30纳米纤维具有更高的DPPH自由基清除活性（RSA）和ABTS还原活性。对香豆酸（91.19 ~ 92.00 μg/mg）和阿魏酸（63.09 ~ 63.16 μg/mg）在纳米纤维中含量最高。与粉末相比，纳米纤维具有更高的最大降解温度，表明其热性能得到改善。共价键和肽键在250°C以上断裂。小球藻-玉米蛋白之间的过渡区温度范围为250 ~ 300℃，对应于相邻氢键分子片之间的界面。小球藻和玉米蛋白之间的特殊相互作用导致晶体相和区域的改变。玉米蛋白羟基与小球藻羧基或羟基之间的氢键作用导致了2 - θ强度的变化。综合表征揭示了小球藻-玉米蛋白纳米纤维作为生物材料的协同潜力及其在可重复使用包装、智能涂层和自清洁表面方面的潜在应用。

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引用次数: 0

Quantitative evaluation of vacuum conditions for void removal in flip-chip underfill encapsulation 倒装下填充封装中真空去除空隙条件的定量评价

IF 6.8 3区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Science: Advanced Materials and Devices

Pub Date : 2025-10-29 DOI: 10.1016/j.jsamd.2025.101035

Seonghyeon Kim , Sanghyun Lee

Void formation during underfill encapsulation remains a critical reliability challenge in flip-chip semiconductor packaging. This study quantitatively evaluates the effectiveness of vacuum-assisted degassing in eliminating entrapped voids within the underfill layer. The void-removal process was directly visualized during vacuum treatment, and image-based quantitative analysis was employed to assess degassing performance under well-controlled vacuum conditions. Experiments were conducted at three vacuum pressures (−0.03, −0.06, and −0.09 MPa) and holding times (1, 3, and 5 min), using the void-area fraction as the key performance metric. The results indicate that vacuum pressure is the primary factor governing void removal. A size-dependent behavior was observed, where larger voids responded more effectively to higher pressure differentials. To examine viscosity-related effects, three commercial underfill materials with distinct rheological properties were tested under identical vacuum conditions. Despite differences in viscosity, all materials achieved comparable final void-area fractions after degassing, suggesting that, under sufficiently strong vacuum and adequate holding time, material viscosity exerts a minimal influence on the overall void-removal efficiency. These findings provide quantitative insight for optimizing underfill processes by prioritizing vacuum conditions, thereby enhancing packaging reliability through improved void control.

在倒装半导体封装中，下填充封装过程中的空隙形成仍然是一个关键的可靠性挑战。本研究定量评价了真空辅助脱气在消除下充填层内圈闭空隙方面的有效性。在真空处理过程中直接可视化抽真空过程，并采用基于图像的定量分析来评估在控制良好的真空条件下的脱气性能。实验在三种真空压力（- 0.03、- 0.06和- 0.09 MPa）和保温时间（1,3和5min）下进行，以空隙面积分数作为关键性能指标。结果表明，真空压力是影响真空去除的主要因素。观察到一种与尺寸相关的行为，其中较大的空隙对较高的压差反应更有效。为了检验粘度相关的影响，在相同的真空条件下测试了三种具有不同流变性能的商业下填料。尽管粘度不同，但所有材料脱气后的最终空隙面积分数相当，这表明，在足够强的真空和足够的保温时间下，材料粘度对整体脱气效率的影响最小。这些发现为通过优先考虑真空条件来优化下填充工艺提供了定量的见解，从而通过改进空隙控制来提高包装的可靠性。

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引用次数: 0

Progress in synthesis of Ti3C2Tx MXene-based nanostructures for energy harvesting and storage: A review 基于Ti3C2Tx mxene的能量收集与存储纳米结构的合成研究进展

IF 6.8 3区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Science: Advanced Materials and Devices

Pub Date : 2025-10-29 DOI: 10.1016/j.jsamd.2025.101034

Naveen Kumar , Quy-Van Hoang , Mohamed Ahmed Belal , Kushal Ruthvik Kaja , Phi Hung Nguyen , Quynh Le-Van , Vien Vo , Vo Thi Thuy Linh , Phan Khanh Thinh Nguyen , Qui Thanh Hoai Ta

Ti₃C₂T_x MXene, a two-dimensional transition metal carbide, has emerged as a highly promising material for energy harvesting applications due to its exceptional electrical conductivity, large surface area, and tunable surface chemistry. This review presents a comprehensive overview of recent progress in synthesizing Ti₃C₂T_x MXene and its nanostructured composites, highlighting both conventional and fluoride-free etching methods. We explore the integration of MXene with other functional materials to enhance its performance in solar cells, triboelectric nanogenerators, supercapacitors, and printed batteries. Special attention is given to the role of surface terminations, interlayer interactions, and structural modifications in optimizing electrochemical and mechanical properties. Finally, we discuss current challenges-such as oxidation stability, scalable production, and surface functionalization- and propose future directions for advancing MXene-based technologies in sustainable energy systems.

Ti3C2Tx MXene是一种二维过渡金属碳化物，由于其优异的导电性、大表面积和可调的表面化学性质，已经成为一种非常有前途的能量收集材料。本文综述了近年来合成Ti3C2Tx MXene及其纳米结构复合材料的研究进展，重点介绍了传统和无氟刻蚀方法。我们探索MXene与其他功能材料的集成，以提高其在太阳能电池，摩擦纳米发电机，超级电容器和印刷电池中的性能。特别关注的是表面终止，层间相互作用和结构修饰在优化电化学和机械性能中的作用。最后，我们讨论了当前面临的挑战，如氧化稳定性、可扩展生产和表面功能化，并提出了在可持续能源系统中推进基于mxene技术的未来方向。

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引用次数: 0

Biphasic g-C3N4-AgI nanocomposites and their applications in methylene orange degradation, the hydrogen evolution reaction and antimicrobial activity 双相g-C3N4-AgI纳米复合材料及其在亚甲基橙降解、析氢反应和抗菌活性中的应用

IF 6.8 3区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Science: Advanced Materials and Devices

Pub Date : 2025-10-24 DOI: 10.1016/j.jsamd.2025.101026

Teketel Girma Gindose , Tarekegn Getinet Admasu , Enyew Amare Zereffa , Tesfay G. Ashebr , Fikre Elemo Ayamlo , Fedlu Kedir Sabir , Fanyana M. Mtunzi , Edward Ndumiso Nxumalo , Bikila Alemu , Temesgen Achamo Orshiso , Tsegaye Belege Atisme

In this study, pure g-C₃N₄, AgI, and biphasic g-C₃N₄-AgI nanomaterials were synthesized for photocatalytic and antimicrobial applications. Polyvinyl alcohol (PVA) was used to reduce surface agglomeration in the biphasic g-C₃N₄-AgI nanomaterial. The synthesized materials were characterized by XRD, BET, SEM, HR-TEM, EDS, SAED, DRS, PL, and EIS to study surface phase, surface area, surface morphologies, elemental composition, optical properties, and electron-hole pairs separation efficiencies. The XRD pattern of the AgI and g-C₃N₄ appeared in the g-C₃N₄-AgI nanocomposite, which confirms the successful integration of AgI into the g-C₃N₄ matrix. The calculated band gap energy of the g-C₃N₄, AgI and g-C₃N₄-AgI nanomaterials was 2.75 eV, 2.63 eV and 2.35 eV. The reduced bandgap of the biphasic is due to the synergetic effects of the single materials. The BET results showed a significant increase in surface area for the g-C₃N₄-AgI (98 m²/g) compared to AgI (20 m²/g) and g-C₃N₄ (32 m²/g). This surface area modification in turn enhanced the catalytic potential of the g-C₃N₄-AgI composite. The antibacterial and photocatalytic potentials of all the as-synthesized materials were examined. The maximum photodegradation (94.5%) and hydrogen production (623 μmol/g) rates were observed for the g-C₃N₄-AgI composite. Higher inhibition zones of 20.6 ± 0.34 and 21.8 ± 0.36 mm were observed at 100 μg/mL of g-C₃N₄-AgI against Staphylococcus aureus and Escherichia coli, respectively, as compared to other synthesized materials. These results indicate that g-C₃N₄-AgI nanocomposite exhibited the highest levels of dye degradation, hydrogen production, and bacteriostatic action.

本研究合成了纯g-C3N4、AgI和双相g-C3N4-AgI纳米材料，用于光催化和抗菌应用。采用聚乙烯醇（PVA）减少了双相g-C3N4-AgI纳米材料的表面团聚。采用XRD、BET、SEM、HR-TEM、EDS、SAED、DRS、PL和EIS等手段对合成的材料进行表征，研究了材料的表面相、表面积、表面形貌、元素组成、光学性质和电子空穴对分离效率。在g-C3N4-AgI纳米复合材料中出现了AgI和g-C3N4的XRD图谱，证实了AgI成功整合到g-C3N4基体中。计算得到g-C3N4、AgI和g-C3N4-AgI纳米材料的能带能分别为2.75 eV、2.63 eV和2.35 eV。双相带隙的减小是由于单一材料的协同作用。BET结果显示，与AgI （20 m2/g）和g- c3n4 （32 m2/g）相比，g- c3n4 -AgI的表面积显著增加（98 m2/g）。这种表面改性反过来又增强了g-C3N4-AgI复合材料的催化潜力。对合成材料的抑菌和光催化性能进行了测试。g- c3n4 - agi复合材料的最大光降解率为94.5%，产氢率为623 μmol/g。100 μg/mL g-C3N4-AgI对金黄色葡萄球菌和大肠杆菌的抑制面积分别为20.6±0.34和21.8±0.36 mm，高于其他合成材料。这些结果表明，g-C3N4-AgI纳米复合材料表现出最高水平的染料降解、产氢和抑菌作用。

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引用次数: 0

Zinc-doped calcium magnesium silicate ceramics: A comprehensive study on bioactivity, mechanical strength, and microbial resistance 锌掺杂硅酸钙镁陶瓷：生物活性、机械强度和微生物抗性的综合研究

IF 6.8 3区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Science: Advanced Materials and Devices

Pub Date : 2025-10-24 DOI: 10.1016/j.jsamd.2025.101023

Sherlin Joseph , Vajjala Govardhan , Soundhariyaa Thirumagal Nedunchezhian , Dhaya Rani Varkey , Jayanthi Abraham , Rajan Choudhary , Sasikumar Swamiappan

The demand for bone tissue engineering materials has increased significantly due to the rising prevalence of bone-related diseases and injuries. This study focuses on developing a bioceramic material offering enhanced mechanical strength, antibacterial properties, biomineralization potential, and biocompatibility, aiming to overcome the limitations associated with conventional calcium silicate-based ceramics. Zinc doped-diopside (Ca_(1-X)Zn_XMgSi₂O₆) was prepared through the sol-gel combustion method, utilizing tartaric acid as a fuel. Zinc (Zn²⁺) ion was incorporated as a dopant to enhance the in-vitro biological performance of the material. Zinc incorporation into the diopside matrix was analyzed using FT-IR spectroscopy and X-ray diffraction, confirming successful incorporation of zinc ion, while SEM imaging highlighted the morphological effects of zinc doping. Zinc doping significantly enhanced the apatite-forming ability of diopside, improved compressive strength up to 109 MPa, and facilitated controlled degradation factors critical for effective bone regeneration. Furthermore, the release of Zn²⁺ ions imparted strong antimicrobial activity, with Pseudomonas aeruginosa showing up to 69 % inhibition, representing a 1.08-fold increase compared to pure diopside. Antifungal efficacy was also evident, with inhibition rates of approximately 60 % against Aspergillus niger and Fusarium oxysporum, corresponding to a 1.28-fold improvement over the pure diopside. Notably, the material exhibited a microbial static effect, inhibiting the growth and proliferation of the tested clinical pathogens. These results underscore the potential of zinc-doped diopside as a multifunctional biomaterial with significant promise for hard tissue engineering applications.

由于骨相关疾病和损伤的患病率上升，对骨组织工程材料的需求显著增加。本研究的重点是开发一种具有增强机械强度、抗菌性能、生物矿化潜力和生物相容性的生物陶瓷材料，旨在克服传统硅酸钙基陶瓷的局限性。以酒石酸为燃料，采用溶胶-凝胶燃烧法制备了掺杂锌的透辉苷（Ca(1-X)ZnXMgSi2O6）。加入锌离子（Zn2+）作为掺杂剂，提高材料的体外生物性能。利用FT-IR光谱和x射线衍射分析锌在透辉石基体中的掺入，证实锌离子成功掺入，而SEM成像则突出了锌掺杂的形态效应。锌掺杂显著增强透辉石形成磷灰石的能力，提高抗压强度至109mpa，促进了有效骨再生的关键降解因素的控制。此外，Zn2+离子的释放赋予了很强的抗菌活性，铜绿假单胞菌的抑制率高达69%，比纯透花苷提高了1.08倍。抗真菌效果也很明显，对黑曲霉和尖孢镰刀菌的抑制率约为60%，比纯透花皂苷提高了1.28倍。值得注意的是，该材料表现出微生物静态效应，抑制了所测试的临床病原体的生长和增殖。这些结果强调了锌掺杂透辉石作为一种多功能生物材料的潜力，具有重要的硬组织工程应用前景。

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引用次数: 0

ZnFe2O4 nanoparticle-modified biopolymer composites for next-generation energy and electronic applications 纳米ZnFe2O4修饰生物聚合物复合材料的新一代能源和电子应用

IF 6.8 3区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Science: Advanced Materials and Devices

Pub Date : 2025-10-23 DOI: 10.1016/j.jsamd.2025.101029

Ahlam I. Al-Sulami , Mohamed R. Elamin , Nourah A. Alsobai , Mha Albqmi , Nuha Y. Elamin , M.O. Farea , E.M. Abdelrazek , A. Rajeh

Zinc ferrite (ZnFe₂O₄) nanoparticles were synthesized by the co-precipitation method, producing a spinel phase with an average crystallite size of ∼34 nm. These nanoparticles were then incorporated into a polyvinylpyrrolidone (PVP) and sodium alginate (NaAlg) blend matrix using the solution casting technique to fabricate nanocomposites. Structural characterization confirmed the successful dispersion of ZnFe₂O₄ within the polymer matrix and revealed a decrease in crystallinity upon nanoparticle addition. FTIR spectra indicated strong interactions between Zn/Fe ions and polymer functional groups, leading to partial amorphization. UV–Vis spectroscopy revealed that as the nanofiller concentration increased, the material's ability to absorb light was enhanced, decreasing its transparency. This effect was directly correlated with a progressive narrowing of the direct and indirect band gaps, which were reduced to 4.16 eV and 2.53 eV, respectively, from their initial values of 5.03 eV and 4.57 eV. Dielectric measurements demonstrated enhanced permittivity at low frequencies due to interfacial polarization and a consistent improvement in AC conductivity with nanoparticle loading. The dielectric constant increased from 10 to 60 after adding 2.4 wt% of the nanofiller. The Modulus and Argand plot analyses provided evidence of a non-Debye-type relaxation mechanism, suggesting an enhancement in charge transport properties. Overall, the tailored optical and dielectric behaviors suggest that PVP/NaAlg–ZnFe₂O₄ nanocomposites hold significant promise for optoelectronic, dielectric, and energy-related applications.

采用共沉淀法合成了铁酸锌（ZnFe2O4）纳米颗粒，得到了平均晶粒尺寸为~ 34 nm的尖晶石相。然后利用溶液铸造技术将这些纳米颗粒掺入聚乙烯吡咯烷酮（PVP）和海藻酸钠（NaAlg）共混基质中制备纳米复合材料。结构表征证实了ZnFe2O4在聚合物基体内的成功分散，并揭示了纳米颗粒加入后结晶度的降低。FTIR光谱显示，锌/铁离子与聚合物官能团之间存在强相互作用，导致部分非晶化。紫外可见光谱显示，随着纳米填料浓度的增加，材料的吸收光的能力增强，其透明度降低。这种效应与直接带隙和间接带隙的逐渐缩小直接带隙和间接带隙分别从初始值5.03 eV和4.57 eV减小到4.16 eV和2.53 eV直接相关。介电测量表明，由于界面极化，低频时介电常数增强，纳米颗粒加载后交流电导率持续改善。加入2.4 wt%的纳米填料后，介电常数由10提高到60。模量和Argand图分析提供了非debye型弛豫机制的证据，表明电荷输运性质增强。总的来说，定制的光学和介电行为表明PVP/ NaAlg-ZnFe2O4纳米复合材料在光电、介电和能源相关应用中具有重要的前景。

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引用次数: 0

Electrospun nanofibers for wearable cardiovascular health monitoring 用于可穿戴心血管健康监测的静电纺纳米纤维

IF 6.8 3区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Science: Advanced Materials and Devices

Pub Date : 2025-10-23 DOI: 10.1016/j.jsamd.2025.101030

Bangul Khan , Rana Talha Khalid , Umay Amara , Nimra Imdad , Muhammad Hasan Masrur , Muhammad Awais , Abdul Qadeer Laghari , Bilawal Khan , Mohamed Elgendi , Bee Luan Khoo , Saad Abdullah

Cardiovascular diseases (CVDs) remain the leading cause of global mortality, driving the demand for innovative, non-invasive, and continuous monitoring technologies. Electrospun nanofibers have emerged as a versatile solution due to their high surface area, tunable porosity, mechanical flexibility, and biocompatibility. These properties enable their integration into wearable sensors, biosensors, and regenerative scaffolds for real-time cardiovascular health and therapy monitoring. This review comprehensively explores the evolution of electrospinning techniques, including coaxial, centrifugal, multi-coaxial, side-by-side, and multilayer methods, and their applications in developing advanced cardiovascular devices. Emphasis is placed on electrospun nanofibers for pulse wave and blood pressure monitoring, ECG acquisition, cardiac biomarker detection, and tissue engineering. Additionally, the review discusses polymer selection, fabrication parameters, and the challenges of clinical translation. By highlighting recent innovations and future directions, this work underscores the transformative potential of electrospun nanofibers in personalised cardiovascular diagnostics and regenerative medicine.

心血管疾病（cvd）仍然是全球死亡的主要原因，推动了对创新、非侵入性和连续监测技术的需求。静电纺纳米纤维由于其高表面积、可调孔隙度、机械柔韧性和生物相容性而成为一种通用的解决方案。这些特性使其能够集成到可穿戴传感器、生物传感器和再生支架中，用于实时心血管健康和治疗监测。本文综述了静电纺丝技术的发展，包括同轴纺丝、离心纺丝、多同轴纺丝、并排纺丝和多层纺丝技术，以及它们在先进心血管设备开发中的应用。重点放在电纺纳米纤维的脉搏波和血压监测，心电图采集，心脏生物标志物检测和组织工程。此外，本文还讨论了聚合物的选择、制造参数和临床翻译的挑战。通过强调最近的创新和未来的方向，这项工作强调了电纺纳米纤维在个性化心血管诊断和再生医学方面的变革潜力。

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引用次数: 0

Intrinsically temperature-insensitive flexible pressure sensor based on polyvinyl chloride/carbon black composites 基于聚氯乙烯/炭黑复合材料的固有温度不敏感柔性压力传感器

IF 6.8 3区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Science: Advanced Materials and Devices

Pub Date : 2025-10-22 DOI: 10.1016/j.jsamd.2025.101033

Xirui Guo , Ping Sun , Yao Xiao

Due to the temperature sensitivity typically exhibited by conductive polymer composites (CPCs), changes in the ambient temperature can seriously affect the measurement accuracy of flexible pressure sensors. Therefore, realizing that CPC-based flexible pressure sensors have good resistance to temperature changes is an urgent problem. Herein, a polyvinyl chloride/carbon black (PVC/CB) conductive composite with a resistance temperature coefficient approaching zero (−0.0077 %°C⁻¹ in the temperature range of 25–55 °C) is developed to successfully prevent the changes in resistance that conductive composite materials typically undergo with temperature fluctuation. PVC/CB functional paste is used to prepare the pressure-sensitive layer of the micro-flexible pressure sensor by using the screen printing method. The performance of this sensor is not affected by temperature, and it exhibits a high sensitivity of 0.514 kPa⁻¹, a rapid response time (15 ms), and good stability. These research results provide new ideas for designing and preparing CPC-based flexible sensors, promoting their application in wearable devices, medical monitoring, aerospace, and other fields.

由于导电聚合物复合材料（cpc）通常表现出的温度敏感性，环境温度的变化会严重影响柔性压力传感器的测量精度。因此，实现基于cpc的柔性压力传感器对温度变化具有良好的耐受性是一个迫切需要解决的问题。本文开发了一种电阻温度系数接近于零（- 0.0077%°C - 1，温度范围为25-55°C）的聚氯乙烯/炭黑（PVC/CB）导电复合材料，成功地防止了导电复合材料通常随温度波动而发生的电阻变化。采用PVC/CB功能浆料，采用丝网印刷法制备微柔性压力传感器的压敏层。该传感器的性能不受温度的影响，灵敏度为0.514 kPa−1，响应时间快（15 ms），稳定性好。这些研究成果为基于cpc的柔性传感器的设计和制备提供了新的思路，促进了其在可穿戴设备、医疗监测、航空航天等领域的应用。

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引用次数: 0

Influence of Sn doping on structural, optical, and photoelectrical properties of NiO nanostructures for optoelectronic applications 锡掺杂对光电用NiO纳米结构结构、光学和光电性能的影响

IF 6.8 3区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Science: Advanced Materials and Devices

Pub Date : 2025-10-20 DOI: 10.1016/j.jsamd.2025.101031

Anil Rakshe , Kishor More , Amol Patil , Sagar Balgude , Babaji Ghule , Chetan Harak , Rajendra Ahire , Sudam Chavhan , Kishor Kumar Sadasivuni

This work presents the synthesis of Sn doped NiO nanostructures with varying doping concentrations (0 %, 1.25 %, 2.5 %, 5 %, and 10 %) using a hydrothermal method, aiming to explore the impact of Sn incorporation on their structural, optical, and photoelectrical behavior. X-ray diffraction (XRD) patterns confirmed the retention of the face-centered cubic phase across all samples, with a notable reduction in crystallite size from 16.02 nm (undoped) to 11.90 nm (10 % Sn-doped), attributed to the partial substitution of Ni²⁺ by Sn⁴⁺ ions. Scanning electron microscopy (SEM) coupled with energy-dispersive X-ray spectroscopy (EDX) revealed a progressive decrease in particle size and improved morphological uniformity as the Sn content increased. UV–Vis spectral analysis exhibited a redshift in the absorption edge with increasing Sn concentration, corresponding to a narrowing of the optical band gap from 3.16 eV to 2.68 eV, which facilitates enhanced photon absorption. Under UV illumination, the photocurrent response improved significantly, with the 10 % Sn-doped sample demonstrating a peak photocurrent of 25.09 nA at 3 V bias, compared to 16.28 nA for the pristine NiO. The highest photosensitivity and photoresponsivity were recorded for the 10 % Sn-doped sample, reaching 0.16 μA/W. These results underscore the potential of Sn doping as a viable strategy to enhance the photoelectrical performance of NiO-based nanostructures for optoelectronic device applications, particularly in UV photodetection technologies.

本研究采用水热法合成了不同掺杂浓度（0%、1.25%、2.5%、5%和10%）的锡掺杂NiO纳米结构，旨在探索锡掺杂对其结构、光学和光电行为的影响。x射线衍射（XRD）证实了所有样品中面心立方相的保留，由于Sn4+离子部分取代了Ni2+，晶体尺寸从16.02 nm（未掺杂）显著减小到11.90 nm（掺杂10% sn）。扫描电镜（SEM）和能量色散x射线能谱（EDX）分析表明，随着Sn含量的增加，晶粒尺寸逐渐减小，形貌均匀性提高。紫外可见光谱分析显示，随着Sn浓度的增加，吸收边出现红移，对应于光带隙从3.16 eV缩小到2.68 eV，有利于增强光子吸收。在紫外光照射下，光电流响应显著改善，掺杂10% sn的样品在3 V偏置下的峰值光电流为25.09 nA，而原始NiO的峰值光电流为16.28 nA。10% sn掺杂样品的光敏性和光响应性最高，达到0.16 μA/W。这些结果强调了锡掺杂作为一种可行的策略来提高镍基纳米结构在光电器件应用中的光电性能的潜力，特别是在紫外光探测技术中。

{"title":"Influence of Sn doping on structural, optical, and photoelectrical properties of NiO nanostructures for optoelectronic applications","authors":"Anil Rakshe , Kishor More , Amol Patil , Sagar Balgude , Babaji Ghule , Chetan Harak , Rajendra Ahire , Sudam Chavhan , Kishor Kumar Sadasivuni","doi":"10.1016/j.jsamd.2025.101031","DOIUrl":"10.1016/j.jsamd.2025.101031","url":null,"abstract":"<div><div>This work presents the synthesis of Sn doped NiO nanostructures with varying doping concentrations (0 %, 1.25 %, 2.5 %, 5 %, and 10 %) using a hydrothermal method, aiming to explore the impact of Sn incorporation on their structural, optical, and photoelectrical behavior. X-ray diffraction (XRD) patterns confirmed the retention of the face-centered cubic phase across all samples, with a notable reduction in crystallite size from 16.02 nm (undoped) to 11.90 nm (10 % Sn-doped), attributed to the partial substitution of Ni<sup>2+</sup> by Sn<sup>4+</sup> ions. Scanning electron microscopy (SEM) coupled with energy-dispersive X-ray spectroscopy (EDX) revealed a progressive decrease in particle size and improved morphological uniformity as the Sn content increased. UV–Vis spectral analysis exhibited a redshift in the absorption edge with increasing Sn concentration, corresponding to a narrowing of the optical band gap from 3.16 eV to 2.68 eV, which facilitates enhanced photon absorption. Under UV illumination, the photocurrent response improved significantly, with the 10 % Sn-doped sample demonstrating a peak photocurrent of 25.09 nA at 3 V bias, compared to 16.28 nA for the pristine NiO. The highest photosensitivity and photoresponsivity were recorded for the 10 % Sn-doped sample, reaching 0.16 μA/W. These results underscore the potential of Sn doping as a viable strategy to enhance the photoelectrical performance of NiO-based nanostructures for optoelectronic device applications, particularly in UV photodetection technologies.</div></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"10 4","pages":"Article 101031"},"PeriodicalIF":6.8,"publicationDate":"2025-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145362101","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

Fabrication and characterization of spicule-inspired composites using stereolithography technique 利用立体光刻技术制备针状激发复合材料及其表征

IF 6.8 3区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Science: Advanced Materials and Devices

Pub Date : 2025-10-20 DOI: 10.1016/j.jsamd.2025.101025

Fariborz Tavangarian , Sorour Sadeghzade

The hierarchical architectures found in biological systems provide a powerful blueprint for designing fracture-resistant brittle materials. This study aimed to fabricate and characterize spicule-inspired composites composed of rigid resin cylinders combined with various adhesive interlayers. The tereolithography technique was used to produce the cylinders, followed by vacuum-assisted infiltration of an adhesive between the layers. Nested cylindrical structures (NCSs) with varying rigid resin layer thicknesses (0.5, 1.0, 1.3 mm) and inter-cylinder spacings (0.05, 0.1, 0.15 mm) were fabricated and infiltrated with different organic adhesives. The results demonstrated that a geometry of 0.5 mm layer thickness and 0.15 mm spacing, combined with Titebond adhesive (sample S0.5t-3-T), yielded a significant improvement in mechanical properties. S0.5t-3-T achieved maximum flexural strength and modulus of 55.49 ± 4.46 MPa, and 2.2 ± 0.12 GPa, respectively, compared with 27.05 ± 3.45 MPa, and 0.8 ± 0.1 GPa for the unfilled S0.5t-3. Increasing cylinder thickness from 0.5 mm to 1.3 mm further enhanced performance, with the S1.3t-3-T sample achieving a maximum flexural strength of 118.13 ± 11.34 MPa and modulus of 3.48 ± 0.21 GPa. Microscopic analysis and fractography identified asperity interlocking, surface waviness, and organic layer stretching as the primary toughening mechanisms. These findings provide specific geometric and interfacial design windows for bioinspired brittle composites, promoting translation of natural spicule structures into high-performance engineering materials.

在生物系统中发现的层次结构为设计抗断裂脆性材料提供了强有力的蓝图。本研究旨在制备和表征由刚性树脂圆柱体结合各种胶粘剂中间层组成的针状激发复合材料。采用静光刻技术生产圆柱体，然后在层之间真空辅助渗透粘合剂。制备了具有不同刚性树脂层厚度（0.5、1.0、1.3 mm）和柱间间距（0.05、0.1、0.15 mm）的嵌套圆柱结构（NCSs），并用不同的有机粘合剂进行浸润。结果表明，层厚为0.5 mm，间距为0.15 mm的几何形状，结合Titebond粘合剂（样品S0.5t-3-T），可以显著改善机械性能。S0.5t-3- t的最大抗弯强度和模量分别为55.49±4.46 MPa和2.2±0.12 GPa，而未填充的S0.5t-3的最大抗弯强度和模量分别为27.05±3.45 MPa和0.8±0.1 GPa。将圆柱体厚度从0.5 mm增加到1.3 mm进一步提高了性能，S1.3t-3-T样品的最大抗弯强度为118.13±11.34 MPa，模量为3.48±0.21 GPa。显微分析和断口分析表明，粗糙互锁、表面波纹和有机层拉伸是主要的增韧机制。这些发现为仿生脆性复合材料提供了特定的几何和界面设计窗口，促进了天然针状结构向高性能工程材料的转化。

{"title":"Fabrication and characterization of spicule-inspired composites using stereolithography technique","authors":"Fariborz Tavangarian , Sorour Sadeghzade","doi":"10.1016/j.jsamd.2025.101025","DOIUrl":"10.1016/j.jsamd.2025.101025","url":null,"abstract":"<div><div>The hierarchical architectures found in biological systems provide a powerful blueprint for designing fracture-resistant brittle materials. This study aimed to fabricate and characterize spicule-inspired composites composed of rigid resin cylinders combined with various adhesive interlayers. The tereolithography technique was used to produce the cylinders, followed by vacuum-assisted infiltration of an adhesive between the layers. Nested cylindrical structures (NCSs) with varying rigid resin layer thicknesses (0.5, 1.0, 1.3 mm) and inter-cylinder spacings (0.05, 0.1, 0.15 mm) were fabricated and infiltrated with different organic adhesives. The results demonstrated that a geometry of 0.5 mm layer thickness and 0.15 mm spacing, combined with Titebond adhesive (sample S0.5t-3-T), yielded a significant improvement in mechanical properties. S0.5t-3-T achieved maximum flexural strength and modulus of 55.49 ± 4.46 MPa, and 2.2 ± 0.12 GPa, respectively, compared with 27.05 ± 3.45 MPa, and 0.8 ± 0.1 GPa for the unfilled S0.5t-3. Increasing cylinder thickness from 0.5 mm to 1.3 mm further enhanced performance, with the S1.3t-3-T sample achieving a maximum flexural strength of 118.13 ± 11.34 MPa and modulus of 3.48 ± 0.21 GPa. Microscopic analysis and fractography identified asperity interlocking, surface waviness, and organic layer stretching as the primary toughening mechanisms. These findings provide specific geometric and interfacial design windows for bioinspired brittle composites, promoting translation of natural spicule structures into high-performance engineering materials.</div></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"10 4","pages":"Article 101025"},"PeriodicalIF":6.8,"publicationDate":"2025-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145362118","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