JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
·
IF 9.7
Shufan He,Tao Jiang,Chengwei Ye,Wenzhong Wang,Shaochun Tang
The development of low-cost and high-activity electrocatalysts is crucial for clean energy production and sustainable development. In particular, non-noble-metal-based medium-entropy materials (MEMs) have recently attracted considerable attention because of their excellent electrocatalytic performance and have become a new research hotspot in the field of electrocatalysis. Additionally, the fewer main elements allow MEMs to be easily recycled and synthesized, with potential industrial applications. Inspired by these advantages, spindle-shaped (Fe 2 CoNi)Te 2 medium-entropy metal telluride (METe) nanostructures were prepared via in situ Te doping during thermal treatment of metal–organic frameworks (MOFs). The resulting spindle-shaped (Fe 2 CoNi)Te 2 METe prepared with an optimal ratio of Fe 2 CoNi-MOF and the tellurium powder exhibits excellent electrocatalytic activity and stability for the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), achieving low overpotentials of 155 and 263 mV at 10 mA cm −2 for the HER and OER, respectively, and outstanding stability in 60 h tests. Density functional theory calculations demonstrate that the enhanced performance of the medium-entropy (Fe 2 CoNi)Te 2 METe nanostructures is attributed to a significant increase in the surface charge density, a substantial increase in the *H adsorption/desorption ability and a remarkable reduction in the Gibbs free energy of the rate-determining step due to the d-band center being closer to the Fermi level. This study provides a feasible strategy for achieving efficient and low-cost electrocatalysts.
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Nanomaterials
·
2025
·Vol. 15
·期 10
·762
·
IF 4.3
Mingkun Zheng,Wancheng Zhang,You Lv,Yong Liu,Rui Xiong,Zhenhua Zhang,Zhihong Lu
The low-symmetry Weyl semimetallic Td-phase WTe2exhibits both a distinct out-of-plane damping torque (τDL) and exceptional charge–spin interconversion efficiency enabled by strong spin-orbit coupling, positioning it as a prime candidate for spin–orbit torque (SOT) applications in two-dimensional transition metal dichalcogenides. Herein, we report on thickness-dependent unconventional out-of-planeτDLin chemically vapor-deposited (CVD) polycrystalline Td-WTe2(t)/Ni80Fe20/MgO/Ti (Td-WTN-t) heterostructures. Angle-resolved spin-torque ferromagnetic resonance measurements on the Td-WTN-12 structure showed significant spin Hall conductivities ofσSH,y= 4.93 × 103(ℏ/2e) Ω−1m−1andσSH,z= 0.81 × 103(ℏ/2e) Ω−1m−1, highlighting its potential for wafer-scale spin–orbit torque device applications. Additionally, a detailed examination of magnetotransport properties in polycrystalline few-layer Td-WTe2films as a function of thickness revealed a marked amplification of the out-of-plane magnetoresistance, which can be ascribed to the anisotropic nature of charge carrier scattering mechanisms within the material. Spin pumping measurements in Td-WTN-theterostructures further revealed thickness-dependent spin transport properties of Td-WTe2, with damping analysis yielding an out-of-plane spin diffusion length ofλSD≈ 14 nm.
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MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Ruiqing Sun,Jing Yuan,Tong Zhou,Yujuan Xie,Qilong Zhan,Shiyi Lu,Haoran Fan,Yangyang Wen,Hongyan Li
Cr(VI), a highly toxic and carcinogenic contaminant, presents significant risks to ecological and human health due to its pervasive presence in food and environmental systems. Even minimal exposure can induce oxidative stress and genotoxicity, underscoring the urgent need for rapid, sensitive, and field-deployable analytical methods. In this study, we developed a ratiometric fluorescence probe based on a blue-emitting metal-organic framework (MOF) as the reference signal and a red-emitting CdTe quantum dot (QDs) as the responsive element. Upon Cr(VI) exposure, red fluorescence is quenched through inner filter effect (IFE) and electrostatic interaction (EI), while blue fluorescence remains unaltered, resulting in a visible color change from pink to blue. To achieve precise quantification, the ratiometric system was integrated with three representative ML algorithms—Random Forest (RF), Support Vector Regression (SVR), and BP Neural Network (BPNN). Smartphone-captured fluorescence images were processed by extracting RGB values to train and validate the ML models. Among them, the RF algorithm demonstrated superior performance, achieving an R 2 value of 0.9942, root mean square error of prediction of 3.5842, mean absolute error of prediction of 2.1893, and 93.31 % prediction accuracy. The proposed method achieved satisfactory recovery rates of 98.81–134.00 % and relative standard deviations below 4.32 % in real food and environmental samples. This study presents an intelligent, dual-mode strategy integrating ratiometric fluorescence sensing with machine learning for trace Cr(VI) detection. The approach offers high sensitivity, accuracy, and visual recognition, providing a generalizable platform for automated, on-site, and visualized analysis in complex food and environmental matrices.
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ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Haowen Chen,Kaiyi Luo,Pingping Qian,Yixiao Deng,An Li,Qiang Sun,Lei Yang,Yuquan Liu,Zhengshang Wang,Guang-Kun Ren,Qian Cao,Jun Tang
The donor effect of polycrystalline n-type bismuth telluride (Bi2Te3) during sample preparation usually results in the peak thermoelectric figure of merit (ZT) at temperatures above 400 K, severely restricting its application in the room-temperature (RT) range. A leap in RT performance requires innovative strategies that replace conventional methods of regulating point defects with limited effectiveness. We demonstrate excellent thermoelectric performance with an RT figure of merit, ZT = 1.2, and a maximum ZT = 1.3 at 325 K, by regulating the high-potential barrier heterointerfaces composed of La2O3 nanoparticles (NPs) and Bi2Te2.7Se0.3 (BTS). The created energy barriers at grain boundaries scatter and localize carriers through O–Bi ionic bonding and O–Te hybridization, enhancing the density of states in adjacent regions and leading to a rapid rise in the RT Seebeck coefficient (from 148.67 μV K–1 to 222.84 μV K–1 at 300 K). Another aspect of La2O3 NPs, as the second term of nano-oxide, introduces multiscale defect-scattering phonons, thereby enhancing thermal performance. Finally, at temperature difference ΔT = 10 K, a maximum output voltage and power, Vmax = 239.73 mV and Pmax= 10.50 mW, can be achieved with the fabricated TE module. Our findings underscore the full potential for promoting the performance of thermoelectric materials in the lower temperature region via high-energy barrier interface engineering.
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Small
·
2025
·Vol. 21
·期 37
·e02985
·
IF 12.1
Yi Chang,Wenyi Mao,Yu Zhang,Zirui Dong,Yunpu Zhang,Linke Li,Jiye Zhang,Jun Luo
Ductile thermoelectric materials and devices, capable of converting human body heat into electricity through the Seebeck effect, are emerging as a promising solution for powering wearable technologies. The recent discovery of Ag 2 S-based ductile thermoelectric materials has injected new vitality into this field, while the excess carrier concentration of these materials results in substantially lower thermoelectric performance compared to traditional inorganic thermoelectrics. Herein, by reducing the electronegativity of the anion sublattice and producing a silver deficiency at the cation site, an optimal carrier concentration is attained in the Ag 5.98 SSe 0.6 Te 1.4 material, leading to simultaneously high power factor (6.0 µW cm −1 K −2 ) and low total thermal conductivity (0.27 W m −1 K −1 ) at room temperature. Concurrently, it achieves a record thermoelectric figure of merit of 0.65 among Ag 2 S-based ductile thermoelectrics, while maintaining favorable phase stability and mechanical properties. A six-leg Ag 5.98 SSe 0.6 Te 1.4 flexible thermoelectric device exhibits a normalized maximum power density of 0.16 W m −1 , an order of magnitude higher than that of existing flexible organic as well as inorganic–organic hybrid thermoelectric devices, demonstrating significant progress in the development of ductile thermoelectrics.
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ACS Applied Energy Materials
·
2025
·
IF 5.5
Chao Wu,Xin Miao,Aojie Zhang,Mingxing Guo,Jianxiang Lin,Anjun Jin,Wenhao Fan,Shaoping Chen
Despite the excellent thermoelectric properties of Te, the element diffusion and reaction at the interface with the metal electrodes introduce a large contact resistivity (ρc), significantly reducing the conversion efficiency (η) of the device. Therefore, suitable barrier layers are being sought to optimize the connection between Te and metal electrodes. In this study, a Sn–Te alloy barrier layer is reported based on interfacial reaction. The results indicate that there is no reaction layer or microscopic defects at the interface of the SnTe/Te0.985Sb0.015 device. Additionally, the η of the single-leg device is approximately 4.7% at a temperature difference of 230 K. Notably, this ηmax is 100% higher than that of the Ni/Te0.985Sb0.015/Ni device. Meanwhile, the interface exhibits good thermal stability, with no significant changes observed in ρc, η, and interface microstructure after aging at 523 K for 18 days. This work provides valuable insights into optimizing the interface between thermoelectric materials and metal electrodes, which could lead to the development of more efficient and stable thermoelectric devices.
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ACS Photonics
·
2025
·
IF 6.7
Lijian Li,Peng Guo,WenJie Li,Yun Wei,QinZhi Zhao,Peng Wan,Caixia Kan,Da Ning Shi,Mingming Jiang
Weyl semiconductor Te holds great promise for next-generation optoelectronics due to its ultrahigh carrier mobility and unique topological surface states. However, its practical application is hindered by challenges such as the lack of scalable wafer-scale manufacturing methods for uniform films and high dark current. This study reports an in situ deposition strategy enabling wafer-scale fabrication of 64-pixel GaAs/Te van der Waals heterojunction (vdWH) arrays, achieving ultrawide-band photoresponse from solar-blind to near-infrared. Especially upon 1050 nm illumination, a GaAs/Te unit device exhibits superior performance, including an impressive responsivity of 55 mA/W, a specific detectivity of 2 × 1012 Jones, and a fast response speed of 2.6/5.1 ms at 0 V bias. Owing to the strong in-plane anisotropy of the Te layer, the detector achieves an anisotropy ratio of 2.57 at 1050 nm. The enhanced performance primarily stems from Te’s topological surface state, which enables robust interlayer coupling with GaAs while effectively suppressing interfacial defects. The GaAs/Te array architecture, enabled by its remarkable spatial uniformity in the pixel arrangement, demonstrates exceptional potential for polarization-encrypted imaging and pixel-level multispectral fusion technologies. Significantly, the implementation of topological vdW contact engineering, coupled with wafer-scale synthesis of Weyl semiconductor Te, establishes a transformative platform for advancing next-generation optoelectronic systems and CMOS-integrated photonic devices.
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Materials Today Physics
·
2025
·
IF 9.7
Jisheng Liang,Qi Zhou,Zhengniu Pan,Zhongwei Zhang,Fengting Mao,Shiyuan Zhao,Sijing Zhu,Jun-liang Chen,Jie Gao,Lei Miao
N-type Mg 3 (Sb,Bi) 2 Zintl compounds have emerged as promising candidates for high-temperature energy applications due to their exceptional thermoelectric performance, making them pivotal in the development of sustainable energy technologies. Despite recent advancements, these materials suffer from low carrier mobility caused by polar covalent bonds , which degrade electrical conductivity and overall thermoelectric efficiency. In this study, we introduce beryllium , a bivalent homologous group element, as a cationic dopant to substitute for Mg in Mg 3.2 Sb 1.5 Bi 0.49 Te 0.01 . This substitution weakens the polarity of the chemical bonds, significantly enhancing carrier mobility from ∼62 to ∼138 cm 2 V −1 s −1 . Theoretical analysis using the single parabolic band model confirms that the effective mass decreases with increasing Be doping content. First-principles calculations further reveal that Be doping leads to stronger charge localization due to their higher electronegativity and shifts the Fermi level into the conduction band and narrows the band gap, strengthening the n-type semiconducting properties. This optimization yields an impressive power factor of ∼2022 μW m −1 K −2 at 523 K in Mg 3.12 Be 0.08 Sb 1.5 Bi 0.49 Te 0.01 , owing to the improved carrier mobility . Furthermore, the Be atoms as point defects induces significant lattice distortions and strains, effectively suppressing lattice thermal conductivity to ∼0.38 W m −1 K −1 at 573 K. Consequently, we achieve a remarkable ZT of 1.54 at 673 K and a high average ZT of 1.17 in n-type Mg 3.14 Be 0.06 Sb 1.5 Bi 0.49 Te 0.01 . Our work offers new strategies to enhance the thermoelectric properties of n-type Mg 3 (Sb,Bi) 2 materials, advancing high-temperature sustainable energy technologies.
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Journal of the American Chemical Society
·
2025
·
IF 15.6
Yeqing Xu,Abuduheiremu Awati,Shan Zhou,Runhao Zhang,Xin Zhang,Hui Zeng,Yaxin Guo,Yuanbo Song,Chengmin Hu,Lei Xie,Qirui Liang,Kang Liang,Lei Jiang,Dongyuan Zhao,Biao Kong
Pesticides are vital for crop and seafood production but leave persistent residues that pose risks to ecosystems and human health through bioaccumulation. The detection of pesticide residues requires highly sensitive and selective technologies. Herein, a nanochannel sensor capable of dual recognition of ionic charge and molecular conformation based on molecular imprinting technology (MIT) is presented, offering a significant improvement in selectivity and sensitivity over traditional nanopore sensors. The MIT-based nanochannels with imprinting sites tailored to pesticide molecules go beyond recognizing the molecular size and surface functional groups, enabling the detection of molecular configurations. In this research, the approach enables the detection of 10 pesticide molecules with detection limits (LODs) ranging from 12.9 to 26.9 pM, achieving two orders of magnitude lower than fluorescence-based methods. Density functional theory (DFT) and molecular dynamics (MD) simulations revealed hydrogen bonding as the dominant interaction in the imprinting process. This versatile nanochannel construction method, proposed for the first time, provides dual recognition capabilities and is expected to advance nanochannel sensing while promoting sustainable environmental development.
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JOURNAL OF SOLID STATE CHEMISTRY
·
2025
·
IF 3.5
Zhenduo Fan,Haohang Xu,Jinggeng Zhao,Yaohui Zhang,Xianjie Wang,Yu Sui,Zhe Lv,Jian Liu,Sida Jiang,Zhiguo Liu
As the first intrinsic magnetic topological insulator , MnBi 2 Te 4 has provided a material platform for the realization of various novel physical phenomena arising from the interaction between magnetism and band topology. Here, transition element Zn - doped MnBi 2 Te 4 crystals of millimeter size, synthesized by using self-flux method, are reported. With increasing Zn content, the hexagonal lattice shrinks, and the Raman frequencies show a red shift. All samples undergo a transition from A - type antiferromagnetic (A - AFM) to canted antiferromagnetic (CAFM) to ferromagnetic (FM) under magnetic field . The antiferromagnetic ordering temperature slightly increases from 24.2 K for MnBi 2 Te 4 to 25.2 K for Mn 0.75 Zn 0.25 Bi 2 Te 4 . The transition field from AFM to CAFM decreases from 3.4 T for x = 0–3.07 T for x = 0.25. Isothermal magnetization data suggest that the single - ion anisotropy of Mn 2+ decrease and the interlayer magnetic interaction increase slightly due to the diluted magnetic ions and unit cell shrinkage. Samples Mn 0.9 Zn 0.1 Bi 2 Te 4 and Mn 0.8 Zn 0.2 Bi 2 Te 4 show metallic conduction with a cusplike anomaly at around T N ≈ 24 K, corresponding to a long - range antiferromagnetic (AFM) transition. The increase of T N and decrease of transition field ( H c S F ) upon Zn doping, make it possible to manipulate magnetic and electrical properties in topological insulators by non - magnetic element substitution, which is of great significance for further application in quantum information storage and spintronics .
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TALANTA
·
2025
·
IF 6.1
Jie Ma,Guohao Xi,Zijie Zhou,Lingzhi Wu,Jing Tu
Solid-state nanopores, as a high-throughput and label-free single-molecule detection technology, have been extensively employed in biomolecular analysis. This study investigates the translocation of gold nanoparticles through silicon nitride solid-state nanopores, systematically examining the influence of applied voltage and nanopore diameter on translocation signatures under low-salt conditions. Theoretical simulations and experimental results demonstrate that under low-salt conditions, the translocation signals of gold nanoparticles exhibit biphasic pulse characteristics due to the synergistic interplay of volume exclusion and surface charge interactions. As the applied positive voltage increases, the signal waveform of current enhancement shifts to a biphasic pulse pattern with a typical feature of an initial current increase followed by a subsequent reduction. Furthermore, the biphasic signal profile also demonstrates a dependence on the pore size. Enhanced current signals mostly occur in smaller nanopores, while blocked current is dominant in larger pores. These findings provide experimental evidence for optimizing nanopore dimensions in gold nanoparticle detection and promote nanopore-based single-particle sensing applications.
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Journal of Materials Chemistry A
·
2025
·
IF 9.5
Yueling Lai,Jingying Luo,Xianglong Zhao,Hao Chen,Qianqian Song,Kanghui Zheng,Xin Tong,Ruilin Wang,Yufeng Zhou
In the realm of imaging and optoelectronic devices, near-infrared (NIR) light has garnered significant attention due to its unique properties of deep tissue penetration and anti-interference capability. Among various NIR materials, silver telluride (Ag2Te) colloidal quantum dots (QDs) have emerged as promising candidates due to their low toxicity and broad absorption/emission range. However, the photoluminescence quantum yield (PL QY) and photostability of Ag2Te QDs are relatively low, which poses a considerable challenge to their practical application. We herein report a novel strategy to enhance their optical properties by leveraging the localized surface plasmon resonance (LSPR) effect of non-noble metallic Cu2−xS1−ySey nanoparticles (NPs). Experimental results demonstrate that the core@shell@shell Cu2−xE@SiO2@Ag2Te (E = Se, S) nanostructures (NSs) exhibit a remarkable fluorescence enhancement factor of up to 2.72, with the PL QY increasing from 9.52% to 14.46% and the fluorescence lifetime being significantly prolonged with respect to those of bare Ag2Te QDs. Furthermore, the optimized NS-based photodetectors show a 4.18-fold enhancement in responsivity compared to bare QD-based devices, highlighting the effectiveness of LSPR in optimizing carrier dynamics.
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