Journal of Materials Chemistry C
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2024
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IF 5.7
Rong Qiang,Rui Xue,Di Lan,Yulong Shao,Yi Chen,Xiao Yang,Guanglei Wu
Unique structural design and precise compositional adjustment are universally accepted as effective methods for the enhancement of microwave absorption capacity. However, a profound mechanism is still lacking. Recently, diverse structural construction of MoS2 sheets has attracted considerable attention. This research utilizes flower-like structural construction and composition regulation strategies to enhance the efficiency of MoS2-based microwave absorbing materials. It aims to thoroughly reveal the correlations between structures, components, dielectric properties and the impedance matching characteristics. The high aspect ratio of carbon nanotubes is utilized to construct a complex conductive network. The MoS2 flowers facilitate multiple scattering and reflection, increasing the transmission path of microwaves. Moreover, the heterojunction interfaces between MoS2 and carbon nanotubes enhanced the microwave attenuation mechanism. The results demonstrate that the samples exhibited a strong microwave response at 1.95 mm, with a maximum attenuation of −41.59 dB. Simultaneously, CST simulations verify the actual microwave absorption performance of the composite under far-field conditions. The vertical incident radar cross-section values, compared to PEC, were reduced by a maximum of 36.81 dBm2. These findings clearly indicate that the composite possesses excellent impedance matching and high absorption efficiency. This study provides an in-depth analysis of the microwave loss mechanism in dielectric microwave absorption materials, offering reference for enhancing the performance of similar materials.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
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IF 4.9
Yuxin Tian,Chaobin Mao,Xingyu Zhou,Hao Zhang,Longxiang Yin,Shenghua Ma,Hui Wang
The wide application of electronic pastes in the field of information electronics puts forward higher requirements for printability. As a key component to determine printability, there are few researches on the effect of organic vehicle components on printability of electronic paste. The purpose of the investigation was to explore the effects of different component contents on the properties of organic vehicles and then on the properties of electronic pastes. Experiments on the wettability of organic solvents to silicon wafers and solubility of adhesives were applied to screen organic solvents. The rheological properties of organic vehicles and electronic pastes in the optimization process were evaluated by the combined method of three interval thixotropy test (3ITT), oscillation amplitude sweep test and NMR relaxation time measurement. And the optimum ratio of adhesive, dispersant and coupling agent and the influence on rheological properties of electronic paste were determined. The optimized silver-aluminum paste as front-side paste was screen-printed and sintered to give a height/width (H/W) ratio of 0.4505 and an average resistivity of 5.06×10 −6 Ω cm for the silver grid lines. The paste formulations developed in the investigation provide a new idea for the preparation and development of electronic pastes with excellent performance.
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ACS Applied Materials & Interfaces
·
2025
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IF 8.2
Jianliang Gong,Minhao Liao,Rihui Zhou,Haipeng Li,Abuduwaili Tuohuniyazi,Liqiong Xia,Zhipeng Wang,Yiwang Chen,Jie Feng,Xiaofang Zhang
Effectively transferring the excellent properties of carbon nanotubes (CNTs) at the microscopic scale to one-dimensional macroscopic materials has always been a cross-scale assembly challenge that researchers urgently need to address. In this paper, we present a synergistic dual-polymer-assisted acid spinning and viscoelastic interfacial densification technique, successfully assembling commercially available large-diameter, short-length, low aspect ratio, but easily mass-produced and cost-effective multiwalled carbon nanotubes (MWCNTs) into macroscopic functional fibers with continuous stacking structures, substantial mechanical strength, and good electrical conductivity. These “low-quality” MWCNTs, when processed into fibers using conventional nanomaterial assembly techniques, typically produce samples that are fragile and prone to breakage, with mechanical properties even failing to meet the minimum strength requirements for careful manual collection. We achieved breakthroughs through the following multiple synergistic actions: (1) utilizing the acid-soluble aromatic polyamide polymer Kevlar to assist in the uniform dispersion of MWCNTs in concentrated sulfuric acid (CSA); (2) using Kevlar as a “welding agent” to enhance the MWCNT stacking structure; (3) introducing the water-soluble polymer poly(vinyl alcohol) (PVA) to slow down the CSA-water exchange rate and reduce fiber surface disturbances; (4) inhibiting the gelation/solidification rate to extend the assembly and orientation time of MWCNTs; and (5) filling the pores left after the removal of CSA and water. Ultimately, we successfully prepared dual-polymer-doped CNT fibers (DP-CNTFs) with continuous mechanical collection strength for subsequent densification treatment. Taking advantage of the thermoplastic properties of PVA, we employed polytetrafluoroethylene as a viscoelastic interfacial layer to perform hot-press densification and defect repair on DP-CNTF, further enhancing its mechanical strength by 147.80% and electrical conductivity by over 770%. This technique not only overcomes the practical application bottleneck of continuously assembling and post-treating low-quality MWCNTs but also demonstrates its superiority in large-scale production and performance enhancement, providing a novel pathway for the industrialization of MWCNTs and their fibers.
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APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Shuang Zhou,Xianshun Zeng,Xiuzhen Yan,Fei Xie,Bradley D. Fahlman,Cheng Wang,Wenjiang Li
Copper nanowires (CuNWs) have been widely used in flexible electronics and optoelectronic devices. However, the large contact resistance and poor stability limit their practical applications in optoelectronic devices. Herein, the high aspect ratio CuNWs and uniform ultra-small copper nanoparticles (CuNPs) were grown in-situ on the reduced graphene oxide (rGO) to form copper/reduced graphene oxide (Cu/rGO) nanocomposite by a one-step hydrothermal method. Graphene oxide, which converted to rGO in the synthesis, played an essential role in forming the high aspect ratio CuNWs (L/D ≈ 1666) and the dispersed ultra-small CuNPs (diameter ≈ 2 nm). The photoelectric properties of rGO/Cu/rGO flexible transparent conductive electrodes, assembled by Cu/rGO nanocomposite and outer layer rGO, reduced from graphene oxide by sodium borohydride solution, can be extended over 65 h at 60 °C in air. The high aspect ratio CuNWs and ultra-small CuNPs decorated by rGO resulted in a good bending resistance. This approach is anticipated as an effective strategy to solve problems with oxidation of CuNWs and promote their various applications in flexible optoelectronic devices.
研究领域:
材料科学
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纳米技术
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电子工程
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LANGMUIR
·
2026
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IF 4.4
Shuzhou Xing,Xinrui Wang,Jie Jiang,Xuesong Peng,Sihai Bi,Youzheng Wu,Mingjie Li,Ruopeng Li,Yaqiang Li,Maozhong An,Jiang Qin,Peixia Yang
Driven by the rapid development of 5G/6G communications, high-performance computing, and artificial intelligence, the metallization of high-aspect-ratio through-holes (THs) in printed circuit boards (PCBs) imposes stringent requirements on the thickness uniformity and interconnect reliability of electroplated copper layers. This study systematically investigates the application of a novel leveler, thiazolyl blue (MTT), for PCB THs’ electroplating, successfully realizing high-quality conformal deposition in high-aspect-ratio (10:1) THs. Electrochemical analyses demonstrate that MTT significantly enhances the cathodic polarization and effectively inhibits the reduction of Cu2+. Meanwhile, microscopic morphological characterizations confirm that MTT exhibits excellent leveling capability, reducing the surface roughness of the copper deposit to as low as 0.147 μm. Furthermore, density functional theory (DFT) calculations reveal that the high inhibitory efficiency of MTT originates from the dominant interfacial adsorption of MTT at the cathode, with the bulk cation−π interaction with Cu2+ contributing as a minor secondary effect at the microscopic level. Crystallographic and interfacial wettability analyses further indicate that MTT effectively refines the grain size and promotes the preferential growth of the Cu(200) plane while improving the wettability of the plating bath. In practical high-aspect-ratio through-hole plating tests, the introduction of MTT substantially increases the throwing power (TP) from 25.2% to 96.8%. Based on these results, a competitive interfacial polarization remodeling mechanism governed by multiphysics coupling is proposed to elucidate the intrinsic role of MTT in promoting conformal through-hole deposition. This work provides a solid theoretical foundation and practical engineering guidance for the fabrication of highly reliable, high-frequency 3D interconnected PCB structures.
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MICROELECTRONIC ENGINEERING
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2021
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IF 2.523
Fuliang Wang,Yuhang Tian,Kang Zhou,Rui Yang,Tian Tan,Yan Wang,Wenhao Yao
Through silicon via (TSV) is a promising interconnect technology in three-dimensional (3D) integration which has large packing density, improves efficiency and consumes less energy. Since the optimization process of multi-additives system is complicated to achieve void-free TSV copper filling, the use of a single additive become a new trend. In this paper, the using of a triblock copolymer ethylene oxide (EO) - propylene oxide (PO) - ethylene oxide (EO) as a single additive in TSV copper electrodeposition was investigated. High and low concentration of EPE (0.02 g/L and 0.002 g/L) were used for the filling experiment at different current densities. It was found that low concentration EPE had stronger inhibition ability, and achieved “V shape” filling at 0.3 ASD (A/dm 2 ). However, EPE of high concentration would form micelles in electrolyte, resulting in the decrease of inhibition ability. We proposed a mechanism for the different EPE concentrations to explan the phenomenon. In addition, the effect of ultrasonic agitation on EPE filling performance was investigated. With the ultrasonic agitation , bottom-up filling can be achieved at 0.02 g/L, and filling rates can be increased at 0.002 g/L. This can be attributed to the cavitation of the ultrasound which can promote the mass transfer and clean the activated electrode.
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Journal of Materials Chemistry B
·
2020
·Vol. 8
·期 32
·7213-7224
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IF 5.344
Xiao-Pei Li,Kai-Yun Qu,Feng Zhang,Han-Ning Jiang,Ning Zhang,Cheraga Nihad,Chao-Ming Liu,Kai-Hong Wu,Xiao-Wei Wang,Ning-Ping Huang
The field of cardiac tissue engineering has made significant strides in therapeutic and pharmaceutical applications, highlighted by the development of smart biomaterials. Scaffolds with appropriate properties mimicking the nature of a heart matrix will be highly beneficial for cardiac tissue engineering. In this study, high-aspect-ratio water-dispersed gold nanowires (AuNWs) were synthesized and incorporated into gelatin methacrylate (GelMA) hydrogels, demonstrating enhanced electrical conductivity and mechanical properties of the biomaterial scaffolds. Cardiac cells cultured on GelMA–AuNW hybrid hydrogels exhibited better biological activities such as cell viability and maturation state compared to those cultured on GelMA hydrogels. Moreover, cardiomyocytes showed synchronous beating activity and a faster spontaneous beating rate on GelMA–AuNW hybrid hydrogels. Our strategy of integrating high-aspect-ratio water-dispersed gold nanowires within gelatin methacrylate hydrogels provides a favorable biomaterial scaffold to construct functional cardiac tissue for further applications in cardiac tissue engineering and drug screening.
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Materials Today Communications
·
2021
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IF 3.383
Qing Wang,Yun Mou,Jiaxin Liu,Yang Peng,Mingxiang Chen
The electrochemical behavior of additives determinates the filling process of through ceramic holes (TCHs), which is severely affected by Cu(II) concentration in the virgin make-up solution (VMS). High concentrations of Cu(II) are rarely reported in through-holes (THs) filling owing to its insufficient throwing power. High concentration CuSO 4 (0.7 M) and low concentration H 2 SO 4 (0.61 M) were confirmed as VMS, and thiazolinyl polydipropyl sulfonate (SH110), polyethylene glycol (PEG), and nitrotetrazolium blue chloride (NBT) were chosen as the accelerator, suppressor, and leveler, respectively. The electroplating performances were investigated under different plating solutions. The electrochemical behavior of additives and their combinations were evaluated by galvanostatic and cyclic voltammetric measurements. The filling performance of PEG-SH110-NBT in high Cu(II) solution is affected by convection. Plating efficiency is effectively improved by SH110 in the designed high Cu(II) plating solution. PEG and NBT have a synergistic effect on inhibition, while NBT shows a leveling effect only in the presence of SH110. The plating solution with a low air agitation flow rate effectively promotes the high-quality filling of TCHs with a high aspect ratio (AR) of 5, 4.75, and 3.8. The filled TCHs display mirror-bright surface and grain refinement without the void defects.
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POLYMER ENGINEERING AND SCIENCE
·
2025
·
IF 3.2
Huolin Zhong,Hui Fang,Zhao Yan,Fangjuan Wu
MXenes, two-dimensional transition metal carbides and nitrides, show great potential in various applications. However, traditional synthesis methods often involve toxic fluorine-containing etchants, limiting large-scale production. This study introduces a novel, environmentally friendly approach for synthesizing Ti 3 C 2 T x MXene nanosheets using stone grinding-assisted exfoliation and mild alkaline etching at 80°C. The synthesized MXene nanosheets exhibited high aspect ratios with transverse dimensions mostly on the micrometer scale and a thickness of approximately 3 nm, corresponding to one to two layers of Ti 3 C 2 . MXene/polyvinyl alcohol (PVA) composite membranes were fabricated to demonstrate practical applications. The composite membrane containing 1 wt% MXene achieved a 99.9% UV shielding rate while maintaining 67% visible light transmittance. Furthermore, it significantly enhanced PLA's UV resistance, with protected samples retaining 98.1% tensile strength after 48 hours of UV exposure, compared with 47.8% for unprotected PLA. This fluorine-free synthesis method addresses environmental concerns and enables large-scale MXene production for advanced UV protection applications. Highlights Ti 3 C 2 T x MXene is made via stone grinding and alkaline etching. MXene nanosheets are produced in the micron range and are 1–2 layers thick. The fluorine-free synthesis enables green, large-scale production of MXene. MXene/PVA films show 99.99% UV shielding with 67% visible light transmittance. MXene/PVA coating improves PLA's UV resistance, keeping 98.1% of tensile strength.
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IEEE Transactions on Components Packaging and Manufacturing Technology
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2025
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IF 3
Chuanxi Liang,Yun Chen,Yuanhui Guo,Wenxuan Wu,Maoxiang Hou,Huilong Liu,Li Ma,Xin Chen,Chingping Wong
Electrodeposition is the key to vertical interconnection of through glass vias (TGVs) in 3D packaging. This paper proposes an asymmetric bidirectional pulse electrodeposition strategy based on a Nitrotetrazolium Blue Chloride (NBTC) electrodeposition solution system, enabling high efficiency and defect-free super-filling of TGVs with large apertures and high aspect ratios. The impact of varying parameters, including the amplitude of forward and reverse current density, the turn-on duration of reverse current, the duration of the pretreatment, and the concentration of sulfuric acid, on the deposition morphology and deposition rate of TGVs was examined. And an optimized electrodeposition strategy was proposed to achieve an efficient and defect-free super-filling of TGVs with an aperture of 75 μm and an aspect ratio of 5.5 within 180 min. This filling efficiency was observed to be enhanced by 400% in comparison to the most optimal outcomes previously reported. This will facilitate the development of electrodeposition approaches for the next generation of 3D microelectronic packaging.
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ACS Applied Nano Materials
·
2025
·
IF 5.5
Qingyuan Zhou,Xiaohu Zhao,Yuanchen Jiang,Junwei Zhou,Zhen Liu,Kai Pan
One-dimensional CsPbBr3 nanocrystals (NCs) possess significant potential in laser and photodetection fields due to their longer carrier lifetimes, more efficient carrier transport, and anisotropic optical properties. In recent years, Cs4PbBr6 has been employed to synthesize highly luminescent one-dimensional CsPbBr3 NCs; however, the poor stability of CsPbBr3 NCs produced by this method has limited their practical applications. In this study, CsPbBr3 nanorods (NRs) were prepared by removing CsBr from Cs4PbBr6 using a postsynthetic method. Water was added dropwise to Cs4PbBr6 NCs dispersed in a nonpolar solvent. Due to the high solubility of CsBr in water, the Cs4PbBr6 NCs rapidly converted into CsPbBr3 NCs. At this point, the addition of water-induced dipole–dipole interactions within the system drives the self-assembly of CsPbBr3 NCs into NRs. As the amount of water increased, the local concentration of CsPbBr3 NCs also rose, raising the probability of collisions between CsPbBr3 NCs and resulting in the formation of longer NRs. Subsequently, benzoic acid was introduced to replace the ligands removed along with CsBr. Due to the surface passivation effect of benzoic acid, the stability and photoluminescence performance of the CsPbBr3 NRs were significantly enhanced. The resulting CsPbBr3 NRs exhibited a fluorescence lifetime of 45.97 ns and achieved a high photoluminescence quantum yield (PLQY) of 94.2%. Stability tests showed that the ligand-passivated CsPbBr3 NRs retained 65% of their initial photoluminescence intensity after one month of storage in an open atmospheric environment.
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ACS Applied Materials & Interfaces
·
2026
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IF 7.8
Dandan Zhang,Hongjiang Li,Shushuai Zhu,Gajanan A. Bodkhe,Shoukun Yu,Chen Wang,Mulin Qu,Se Hyun Kim,Peng Liu,Xuan Li,Sang Woo Joo,Xinlin Li,Chenhao Cong
Noninvasive wearable glucose sensors capable of real-time sweat analysis offer a less discomforting alternative for long-term monitoring in patients with diabetes. However, practical implementation remains challenging. Major barriers include insufficient catalytic sensitivity to quantify the low glucose levels in sweat, limited compatibility between nanomaterial synthesis and scalable manufacturing processes, and the lack of a biofluid microenvironment suitable for enzyme-free electrochemical sensing. Here, we address these challenges by combining strong interfacial anchoring on a conductive template with surfactant-assisted growth control to engineer high-aspect-ratio (∼100) 1D Ni-TCPP MOF nanofibers as an active shell on MXene-NH2. In contrast to conventional electrospinning-assisted approaches, the resulting 1D MOF shell is polymer-template-free and thus avoids insulating scaffold components. The resulting fluffy, self-supporting Ni-MOF@MXene architecture is inherently compatible with printed electronics, enabling large-area fabrication of wearable enzyme-free glucose-sensing patches. To overcome the constraints of enzyme-free sensing in physiological biofluids, we further develop an integrated system that combines microfluidics with a NaOH/Nafion/PVA alkaline sustained-release membrane, establishing a localized alkaline microenvironment within sweat to enable continuous analysis.
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