Surfaces and Interfaces
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2024
·
IF 5.7
Peilin Cao,Cong Wang,Linpeng Liu,Kaiwen Ding,Jiahua He,Dejin Yan,Nai Lin,Ji'an Duan
The reliability of Cu bonding technology in three-dimensional integration packaging is limited by high sintering temperatures and the growth of oxide at the joining interface. Hence, we propose a bionic adhesion interface of creeper sucker on the Cu substrate and covered with monolayer graphene, which increases the shear strength by 3 times compared to the conventional flat Cu substrate. The covered graphene layer effectively inhibits the generation of oxide at the joint interface and maintains a high shear strength after aging at 300 °C for 48 h Nanoscale Cu particles could reduce the chemical potential energy of the substrate surface , and stable bonding was achieved at 200 °C under a pressure of 2 MPa. Molecular dynamics simulation models reveal crystal structure evolution and residual stresses during the sintering process . This work demonstrates that bionic microstructures applied to copper bonding play an important role in interface enhancement, resulting in reliable bonding of Cu substrate at low temperatures. The method proposed here can provide insight into diversified applications including high-power light-emitting diodes soldering, SiC electronic devices, and flexible electrode interconnects.
研究领域:
材料科学
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微电子封装
·
纳米技术
·
表面工程
·
固态物理
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APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Qiang Bi,Yilin Zhao,Bo Yang,Yue Du,Ying Xue,Kun Zhang,Juanqin Xue
The abuse of antibiotics has caused serious harm to the ecological environment and human health. Fenton-like advanced oxidation technology is a green and effective treatment means, but how to improve the Fenton reaction efficiency and wide pH adaptability is still a big challenge. Herein, we designed and developed a single-atom catalyst Cu 1 -CN with graphite-phase carbon nitride as the carrier by loading a low amount of metal Cu. The N atom anchors the copper atom in the form of a coordination bond, and the single atom Cu site has excellent performance in activating H 2 O 2 . Not only a short period of time (10 min) oxidation degradation of tetracycline (degradation rate 80 %), and in a broad range of pH (3.2 ∼ 9.5) still maintaining high removal performance (efficiency more than 70 %). Combined with X-ray absorption fine structure characterization and density functional theory (DFT) calculations, it is considered that isolated Cu atom and N atom cooperate to construct highly reactive Cu-N 4 active centre, which completes the task of H 2 O 2 activation. This study provides a new theoretical basis and technical support for the degradation of antibiotic pollutants by single-atom Fenton-like reaction.
研究领域:
环境科学
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催化化学
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高级氧化技术
·
材料化学
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FOOD CHEMISTRY
·
2026
·
IF 9.8
Yunling Shao,Miao Wang,Jianpeng Zhang,Yongxin She,Zhen Cao,Guohua Zhang,Fen Jin,Jing Wang,A.M. Abd El-Aty
In this study, we constructed a peptide‑copper (peptide-Cu) mimetic enzyme for thiram detection. The enzyme mimics peroxidase-like activity (POD), which allows it to catalyze the oxidation of o -phenylenediamine (OPD) substrates in the presence of hydrogen peroxide (H₂O₂). Thiram can prevent the catalytic activity of peptide-Cu mimetic enzymes by surface blocking, inhibiting chromogenic substrate oxidation and facilitating the rapid detection of thiram. The inhibitory mechanism was elucidated through molecular dynamics (MD) simulations and density functional theory (DFT) calculations, revealing that thiram synergistically reduces the catalytic activity of the peptide-Cu mimetic enzyme by disrupting its structural stability and electronic properties. Thiram exhibited good linearity in the concentration range from 0.01 to 5 μg/mL, with a lowest limit of detection (LOD) of 0.048 μg/mL, and showed a good recovery range from 79.71% to 108.13% in real samples. This approach, based on peptide-metal complexes, offers a straightforward and affordable method for pesticide monitoring.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2026
·Vol. 37
·期 14
·1093
·
IF 3.2
Ren Peifeng,Gao Xingchen,Fan Wenhao,Zhang Qiang,Chen Shaoping,Fan Jianfeng
Elemental doping plays a crucial role in optimizing carrier concentration and suppressing lattice thermal conductivity in thermoelectric materials. In this study, Cu atoms were doped in both n- and p-type Mg 3 Sb 2 -based thermoelectric compounds. The results indicate that the incorporation of Cu effectively improves the electrical transport properties of Mg 3 Sb 2 -based thermoelectric compounds while simultaneously suppressing their thermal transport, ultimately achieving enhanced thermoelectric properties: (a) For p-type Mg 3 Sb 2 , a small quantity of Cu atoms provides electrons in the lattice interstitial and thus compensates holes, leading to a decreased carrier concentration and electrical conductivity. However, with increasing Cu content, Cu atoms preferentially occupy Mg2 sites, thereby increasing hole concentration, and thus improving electrical conductivity. Further increasing Cu content, an MgCuSb secondary phase forms, which is unfavorable for overall p-type thermoelectric performance of the Mg 3 Sb 2 -based matrix due to the n-type transport of the MgCuSb compound. (b) For n-type Mg 3 Sb 2 , no such secondary phase was observed despite the same Cu-doping content, which involves a distinct doping mechanism from the p-type one. Consequently, the zT values of p-type Mg 3 Sb 2 materials are improved by 17%–33% over the whole temperature range. And regarding the n-type Mg 3 Sb 2 materials, the highest peak zT value of ~1.4 and average zT avg of ~1.04 are achieved. Therefore, the doping of the Cu element proves to be an effective way in optimizing thermoelectric properties of both p-type and n-type Mg 3 Sb 2 -based materials.
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Science Advances
·
2026
·Vol. 12
·期 29
·
IF 13.9
Qixing Zhang,Jing Gao,Muchen Li,Ying Yang,Guanlan Chen,Han He,Xingfei Chen,Xiaobing Gu,Yajun Gao,Yongcai He,Bo He,Xixiang Xu,Zhenguo Li,Ying Zhao,Lijun Zhang,Michael Grätzel,Xiaodan Zhang
Solar-driven electrochemical CO 2 reduction to multicarbon (C 2+ ) products presents a promising avenue for artificial photosynthesis, yet remains constrained by high overpotentials and limited conversion efficiency. Here, we developed an alkaline environment-modulated prereduction strategy that capitalizes on the divergent thermodynamic stabilities of precursors, enabling the precise synthesis of iodine-doped copper nanotopologies (Cu-I NTs). Featuring tunable under-coordination defects and stabilized high-energy adsorption sites, the Cu-I NTs achieve an onset potential of only −0.37 V versus the reversible hydrogen electrode for C 2+ formation. Operando Raman measurement and density functional theory calculation reveal that the tailored surface topologies favor Cu-CO rotation adsorption, enabling dynamic reorientation from bridge- to atop-binding configurations, which collectively lowers the barrier for CO-CO coupling. Impressively, powering the electrolyzer by a perovskite/silicon tandem together with a single-junction silicon photovoltaic device, the system delivers a photocurrent of 12.34 mA cm −2 at 2.17 V under standard AM 1.5 illumination, achieving a solar-to-C 2+ conversion efficiency of 8.64%.
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FOOD CHEMISTRY
·
2026
·
IF 10.4
Yannan Ma,Runzhong Yu,Boxiang Yao,Jiayu Chen,Han Zhang,Liyuan Zhang
A copper metal-organic framework composite nanozyme (Cu-MOF) with peroxidase-like activity was prepared using an improved room temperature method. Cu-MOF can catalyze H 2 O 2 to release (•OH), thereby oxidizing the colorless chromogenic substrate 3,3′,5,5′-tetramethylbenzidine (TMB) into a blue oxidized product (oxTMB), which has a maximum UV absorption peak at 652 nm. Nicosulfuron can regulate the electronic balance of the redox pair (Cu 2+ /Cu + ) on the Cu-MOF surface, thereby enhancing its peroxidase activity and promoting the deepening of the TMB blue color. Based on this principle, a colorimetric detection method for nicosulfuron was established. The linear range of this method is 0.2–10 μg/mL −1 , and the detection limit is 0.02 mg/kg. This method has been applied for the detection of nicosulfuronin corn samples, with recovery rate ranging from 90.88% to 117.33%, and all relative standard deviation being less than 4%.
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Surfaces and Interfaces
·
2026
·
IF 6
Yonghong Huang,Caoyu Lu,Lihao Wang,Junlin Wang,Yike Yuan,Yi Ouyang,Shijie Gao,Ruihao Wang
Ammonium perchlorate (AP), as a key component of solid propellants, exhibits inherent limitations in combustion efficiency due to its high thermal decomposition temperature and slow decomposition process. To address this, this study synthesized a copper-based metal-organic framework (Cu-BTC) catalyst via a simple solvothermal method. AP/Cu-BTC composites with varying loading levels (1–5 wt%) were prepared, and their effects on AP thermal decomposition, combustion behavior, and catalytic mechanisms were systematically investigated. Results indicate that Cu-BTC significantly enhances the decomposition performance of AP, with a 1% loading demonstrating optimal effects. At a heating rate of 10K/min, the peak temperature of AP's high-temperature decomposition decreased by 119.5°C, the apparent activation energy decreased by 94.4 kJ/mol (-39.8%), and the total heat release increased by 396.1 J/g (+85.7%). Combustion tests revealed that pure AP could not be directly ignited, whereas the addition of Cu-BTC enabled successful ignition. The combustion intensity and duration varied significantly with catalyst loading. Catalytic performance exhibits non-monotonic variation with loading levels, and excessive loading leads to a decline in efficiency due to mass-transfer blockage. The remarkable enhancement in AP performance stems from the synergistic interaction between Cu-BTC's rapid mass transfer capability (derived from its ultra-high specific surface area) and the catalytic function of its Cu²⁺ active sites (facilitating proton/electron transfer). This study offers a novel perspective on precisely regulating solid propellant combustion performance through catalyst structural design and loading optimization.
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Surfaces and Interfaces
·
2026
·
IF 6
Yongjun Song,Yi Zhou,Dongli Guo,Yahui Shi,Jiawei Liang,Haoran Li,Dongjin Wan
An innovative ACF/CC@FeOCl-assisted FTEF-SR system was established. • FeOCl-Cu served as catalyst for the electro-Fenton and as a PMS activator. • The primary generated reactive oxygen species were • OH and SO 4 · − . • Preferential removal of sulfamethoxazole was achieved in different water matrices. • The system exhibits good stability and energy-saving performance. Sulfamethoxazole (SMX), a representative sulfonamide antibiotic contaminant, poses significant environmental risks. Peroxymonosulfate (PMS) activation-driven electro-Fenton (EF) processes have attracted considerable attention for the removal of organic pollutants from water. In this study, a flow-through heterogeneous EF system integrated with PMS activation (FTEF-SR) was developed using a FeOCl-Cu-modified carbon cloth cathode for the efficient degradation of SMX. The FTEF-SR system exhibited broad pH adaptability and excellent recyclability. Under optimized conditions, near-complete removal of SMX (>99%) was achieved within 60 min. Meanwhile, the effects of catalyst dosage and ratio, current, PMS concentration, electrolyte type, pH, as well as initial concentration were systematically investigated. At a current density of 9 mA cm⁻ 2 and a PMS concentration of 1 mM, SMX and total organic carbon (TOC) removal reached 98.9% (30 min) and 80.2% (180 min), respectively. Moreover, the real-world water matrix and common coexisting ions did not significantly inhibit the removal efficiency of SMX, still maintaining above 92%, indicating that this coupling method was feasible in real application. Quenching experiments and electron paramagnetic resonance (EPR) tests revealed that • OH and SO 4 •– dominated the degradation of SMX in the FTEF-SR system. Overall, this work not only advances the development of efficient and sustainable wastewater purification technologies but also provides valuable mechanistic insights for the degradation of antibiotic contaminants. Download: Download high-res image (478KB) Download: Download full-size image
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International Journal of Minerals Metallurgy and Materials
·
2026
·Vol. 33
·期 5
·1461-1471
·
IF 8.8
Wang Fan,Geng Mingxiang,Bao Anyang,Lü Yujie,Huang Pengru,Liu Dongming
LiBH 4 , a solid-state hydrogen storage material with ultra-high theoretical hydrogen capacity, is seriously hindered for the practical applications by its high thermodynamic stability and slow hydrogen desorption kinetics. Herein, the dehydrogenation properties of LiBH 4 are remarkably improved by confinement in the porous (Cu,Ni)/Cu 2 O heterostructure (np-(Cu,Ni)/Cu 2 O), which was achieved using a novel two-step method containing dealloying of Mg–Cu–Ni precursor alloy to form the porous (Cu,Ni) solid solution, followed by micro-oxidation under air conditions. Hydrogen release from the constructed LiBH 4 @np-(Cu,Ni)/Cu 2 O (1:2, mass ratio) system begins at approximately 80°C and ends before 380°C, with 12.5wt% of hydrogen desorbed. Moreover, the apparent dehydrogenation activation energy has been reduced to 44.2 kJ/mol. After rehydrogenation at 400°C under 8 MPa hydrogen pressure, the LiBH 4 @np-(Cu,Ni)/Cu 2 O (1:2, mass ratio) system can release 3.6wt% of hydrogen during the second dehydrogenation process. These findings show that the synergistic effect of confinement and heterostructure catalysis provided by the porous metal derivatives can greatly enhance the hydrogen storage properties of LiBH 4 .
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ACS Catalysis
·
2026
·
IF 13.6
Chunxiao Jin,Shitong Liu,Zikun Wang,Shuaiqi Zhang,Congyu Pan,Aihua Liu,Mingqi Qin,Yuxue Yue,Saisai Wang,Renqin Chang,Zhong-Ting Hu,Jia Zhao
High-load and high-dispersion strategies are an effective way to compensate for the inherent lack of activity of non-precious metals. However, high-load and high-dispersion catalysts are limited by the entropy increase principle and are not only difficult to prepare but also difficult to establish structure–performance relationships in heterogeneous catalytic systems. Here, we report Cu–Cux/MOF-200 catalysts for electrochemical acetylene selective hydrogenation (EASH) featuring high-load and high-dispersion synergistic Cu single atoms (SAs) and nanocluster sites (NCs). Experimental and theoretical calculations show the reactants H2O and C2H2 compete for adsorption at Cu NC/NP sites, while the efficient dual-site synergistic effect compensates for the difficulties in C2H2 activation and insufficient hydrogen ion supply under high current density. The electron-deficient Cu SAs weaken the energy barrier for H2O dissociation, while a linear relationship exists between particle size and valence state of Cu active sites for acetylene activation. Finally, the Cu–Cux/MOF-200 catalysts show no signs of deactivation after 51 h of long-term evaluation in an ethylene-rich atmosphere, achieving acetylene conversion exceeding 99.9% and ethylene selectivity exceeding 90%.
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APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2026
·Vol. 132
·期 4
·336
·
IF 3
Du Xinli,Yu Jian,Ke Shaoqiu,Wei Mingxu,Dong Xiurong,Nie Xiaolei,Zhu Wanting,Wei Ping,Zhang Yu,He Danqi,Liu Mingrui,Hua Lin,Hu Zhili,Zhao Wenyu,Zhang Qingjie
Thermoelectric (TE) materials enable direct thermal-electric energy conversion, but Bi 2 Te 3 -based alloys suffer from limited thermoelectric performance and controversial doping mechanisms of Cu, hindering their practical application in waste heat recovery. To address these issues, this work designs and synthesizes a series of zone-melted p-type Bi 0.5 Sb 1.5*(1− x ) Cu 1.5* x Te 3 +3 wt % Te ( x = 0.0–2.0%) samples. The results show that Cu occupies interstitial sites, suppresses Te volatilization to increase the hole concentration, and enhances the electrical conductivity. Concurrently, lattice distortions and secondary phases reduced lattice thermal conductivity. The 1.0% Cu-doped sample achieves a maximum power factor of 4.74 mW·m − 1 ·K − 2 at 300 K, a peak zT of 1.03 at 412 K, and an average zT of 0.91 (300–500 K), representing improvements of 7%, 8.4%, and 18% over the undoped matrix. Subsequent hot deformation further reduced lattice thermal conductivity but did not enhance zT due to an anomalous rise in carrier concentration and decreased mobility. This study clarifies the interstitial Cu doping mechanism, providing a viable strategy for optimizing Bi 2 Te 3 -based materials.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2026
·
IF 8.7
Ming Jiang,Xueyu Man,Moya Yang,Qiwei Yan,Haijuan Wu,Feng Yang,Youhuan Wei
DNA serves as the primary target for numerous metal complexes in suppression tumor cell proliferation, and Poly ADP ribose polymerase-1 (PARP-1) is critical for DNA repair. In this study, benzothiazole hydrazone was used as a framework to design and synthesize a series of Cu(II) complexes (Cu1-Cu3), which functions as novel PARP-1 inhibitors. These Cu(II) complexes not only effectively inhibited the proliferation of a panel of tumor cells (IC 50 range: 0.51–5.37 μM) but also exhibited potent PARP-1 inhibitory activity (IC 50 range: 0.45–1.52 μM). Notably, complex Cu3 had the most potent activities, exhibiting strong cytotoxicity against T98G cells (IC 50 = 0.51 μM) and significant PARP-1 inhibition (IC 50 = 0.45 μM). Additionally, Cu3 effectively inhibited the migration of T98G cells. Mechanistic studies revealed that Cu3 generated excessive reactive oxygen species (ROS), induced DNA damage, exacerbated DNA double-strand breaks by inhibiting PARP-1 activity, and promoted apoptosis in tumor cells via the mitochondrial pathway.
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