ELECTROANALYSIS
·
2025
·Vol. 37
·期 3
·e12037
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IF 2.3
Jiajia Wang,Chun Kan,Mengping Gao,Baokang Jin
In this paper, a water-soluble highly electrochemical signal cadmium telluride (CdTe)/cadmium selenide (CdSe)/polyaniline nanocomposite was developed through a fast and convenient method, and then the nanocomposite-modified glassy carbon electrode was prepared for the determination of alpha-fetoprotein (AFP). This aptasensor was constructed by covalently immobilizing NH 2 -functionalized AFP-specific aptamer on nanocomposite with plenty of carboxylic groups. This electrochemical biosensor via the layer-by-layer method could evidently increase the steric hindrance of the sensing electrode and effectively depress the electron transfer, leading to obviously decreased current intensity. The ultrahigh sensitivity of this immunoassay is derived from the two primary reasons as follows. First, the CdTe/CdSe multiple-sensitized and cosensitized structure could maximize speed of charge transfer processes between electrodes and the electroactive species, dramatically promote electron transfer, and effectively inhibit the electron–hole recombination, resulting in the significantly enhanced electrochemical current intensity of the sensing electrode. Second, the electrocatalytic oxidation of K 3 Fe(CN) 6 , which makes the CdTe/CdSe change from a lower-energy to higher-energy states (CdTe/CdSe QDs)*, reduces the activation energy of the reaction and the (CdTe/CdSe QDs)* more likely to oxidize, accelerating the transfer of electrons. Scanning electron microscope, transmission electron microscope, and X-ray photoelectron spectroscopy were used to characterize the material. Electrochemical impedance spectroscopy was used to observe the loading process of the material. Differential pulse voltammetry was used as a method of measurement. The immunosensor exhibited a wide linear range from 1.0 to 10.0 μg/mL for target AFP detection, with a low detection limit of 1.0 pg/mL (S/N = 3). To evaluate the analytical reliability, reproducibility, specificity, and stability, the proposed immunosensor was applied to human AFP-spiked serum samples, and acceptable results were obtained, indicating that the method can be readily extended to other bioaffinity assays of clinical or environmental significance.
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Journal of Energy Storage
·
2025
·
IF 9.8
Dan Zhao,Mengyu Dang,Hongyan Han,Wenhao Zhao,Yi Liu,Shouwu Guo
Sb 2 Se 3 has appeared as a highly prospective anode material for lithium-ion batteries (LIBs) owing to its abundant resources, a remarkable theoretical capacity of 670 mA h g −1 , and the presence of both alloy and conversion reaction mechanisms. Nevertheless, its drastic volume change during cycling caused rapid capacity decay. To address these issues, a common approach is to combine Sb 2 Se 3 with carbon materials. In this study, Sb 2 Se 3 encapsulated in multi-walled carbon nanotubes (MWCNTs) were fabricated through a one-step low-pressure vapor-phase reaction, forming the Sb 2 Se 3 @MWCNTs composite. The nanosize effect of Sb 2 Se 3 can alleviate its structural fracture during cycling. MWCNT network is advantageous for electron/ion transport. Subsequently, poly(3,4-ethylenedioxythiophene) (PEDOT), a conjugated polymer, was employed as an electron-enhancing buffer layer to further coat MWCNTs, creating the Sb 2 Se 3 @MWCNTs/PEDOT. More importantly, the PEDOT layer could create a robust solid electrolyte interface (SEI). By adjusting the ratio of Sb 2 Se 3 to MWCNTs, Sb 2 Se 3 @MWCNTs/PEDOT-7:3 composite exhibited a capacity of 648 mAh g −1 after 200 cycles at 0.5 A g −1 and a capacity of 495 mAh g −1 after 970 cycles at 2 A g −1 , demonstrating a highly promising class of high-performance LIB anode materials.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
·
IF 9.7
Hao Wang,Zixuan Yang,Yutong Gao,Ziyue Zheng,Jing Yang,Ting Wang,Dong Yang,Yajun Wang,Tongtao Li,Angang Dong
We present a coordination-inspired strategy for assembling binary nanocrystal superlattices (BNSLs) using CdSe nanotetrapods as symmetry-encoding building blocks. Exploiting their intrinsic tetrahedral geometry, which mimics the sp 3 hybridization of carbon atoms in a diamond lattice, we encode spatially defined binding sites that guide regioselective coassembly with spherical nanocrystals. By tuning the size ratio between components, we achieve both three-dimensional and two-dimensional BNSLs with long-range structural order. Notably, in NaCl-type BNSLs, the CdSe tetrapod sublattice defines a hypothetical porous network that is topologically analogous to a diamond lattice—an architecture difficult to realize using isotropic nanocrystals. The key advantage of this approach lies in its ability to translate molecular coordination principles into nanoscale assembly, thereby enabling access to architecturally complex and topologically rich lattices. A potential limitation, however, is the need for precise control over component size and shape to ensure high-quality ordering. By integrating molecular coordination concepts with nanocrystal assembly, this work establishes nanotetrapods as versatile symmetry-directing building blocks for the rational design of next-generation superlattices. This work establishes nanotetrapods as symmetry-directing building blocks for designing architecturally complex BNSLs, bridging molecular coordination chemistry with nanocrystal assembly.
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ADVANCED MATERIALS
·
2025
·
IF 26.8
Yingjie Zhao,Jiaming Hu,Zhefeng Lou,Lanxin Xu,Wenbin Li,Xiao Lin,Xiaorui Zheng
Analogous to the pivotal SiO 2 /Si junction in modern electronics, the β-Bi 2 SeO 5 /Bi 2 O 2 Se architecture has been demonstrated to enhance the performance of electronic devices. However, its potential to improve the optoelectronic properties of Bi 2 O 2 Se, such as responsivity and detectivity, remains unexplored. The photodetection performance of Bi 2 O 2 Se is primarily limited by intrinsic selenium vacancies at its surface, which lead to low photocurrent and instability. To address this, a defect-engineered β-Bi 2 SeO 5 /Bi 2 O 2 Se heterojunction is constructed with an atomically sharp interface via a developed UV-assisted oxidation strategy. This heterostructure successfully suppresses surface vacancies while enabling dual functionality—surface passivation and photoactive charge separation, resulting in substantially enhanced optoelectronic performance. First-principles calculations confirm a stable type-II band alignment with interfacial transitions enabling efficient carrier dissociation. The visible-near-infrared transparency and high- k of β-Bi 2 SeO 5 further enable top-gated phototransistors with dynamically tunable photoresponse, achieving the largely improved metrics of responsivity (1.2 × 10 4 A W −1 ), detectivity (1.5 × 10 13 Jones), and on/off ratio (2.3 × 10 6 ). Additionally, by using thermal scanning probe lithography, a high-resolution (pixel pitch = 6.5 µm) β-Bi 2 SeO 5 /Bi 2 O 2 Se phototransistor array is fabricated and its imaging capabilities are demonstrated. The results establish an effective defect-engineered strategy with in situ large-area growth capability of β-Bi 2 SeO 5 and high-resolution device patterning, making β-Bi 2 SeO 5 /Bi 2 O 2 Se a promising photoresponsive platform for advanced optoelectronic devices.
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ADVANCED MATERIALS
·
2025
·
IF 26.8
Yifan Chen,Qi Wei,Shuixian Yang,Tao Zhang,Hongfei Chen,Zhihao Fu,Chao Lu,Zhengyong Liu,Yanxiong Wu,Jingshun Pan,Mingjie Li,Zhaohui Li
The mid-infrared focal plane array (FPA) imager has developed over recent decades to become multifunctional, powerful, reliable, miniaturized, and cost-effective. However, the complexity of the refrigerated packaging process (such as dewar flask) and traditional fabrication technology (such as flip-chip) continues to contribute significantly to the high cost of industrial production. Here, a simple, low-cost, and effective type of uncooled mid-infrared FPA imager is reported through the monolithic integration of mid-infrared Pb 1-x Sn x Se nanocrystals (NCs) PIN heterojunction (PbS/Pb 1-x Sn x Se/ZnO) photodetectors and glass-based readout integrated circuits (ROICs). Sn-doping in PbSe NCs not only weakens the internal photocarrier-phonon coupling to reduce thermal noise but also optimizes the energy band structure of the heterojunction to enhance mid-infrared performance. Finally, the PbS/Pb 0.86 Sn 0.14 Se/ZnO heterojunction photodetector demonstrates a dark current (2.7 x 10 −7 A mm −2 at −0.5 V), a detectivity of 7.46 × 10 9 Jones at a peak wavelength of 4.25 µm, air stability (retaining 96.7% performance at 300 K for 360 days) and the corresponding uncooled mid-infrared FPA (64 × 64 pixels) achieves excellent thermal sensitivity of 133 mK. These results underscore the substantial potential applications of mid-infrared FPA based on the heterojunction, including spectral imaging, gas leak detection, and chemical reagent identification.
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ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Jiuzhou Liu,Siwei Cao,Haoran Xu,Jiatian Song,Yichi Zhang,Jiamin Chen,Yedong Qin,Mingjie Cao,Wenjing Zhao,Qinhao Du,Zhengfeng Zhu,Huisheng Peng
Fiber solar cells present a promising power solution for wearable electronics, while fiber quantum dot-sensitized solar cells (FQDSCs) with adjustable light absorption range show great potential to efficiently harvest solar energy. However, due to the inherent difficulty in preparing high-quality active layers and enabling compact and stable interfaces on high-curvature fibers, efficient FQDSC remains unavailable. Here, a hybrid photoanode is designed by incorporating TiO 2 nanoparticle film into aligned TiO 2 nanotube arrays on a Ti wire and a hybrid counter electrode by wrapping a carbon nanotube sheet covered with Cu 2 S nanosheets on another Ti wire. The resulting FQDSC realizes sufficient light harvesting, rapid charge transport, and high structural stability, achieving a record power conversion efficiency of 11.05% that is maintained by over 90% after 1000 cycles of deformation. These FQDSCs are further integrated with fiber batteries into textiles and power a smart life-saving vest for real-time health monitoring and emergency response.
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ANALYTICAL CHEMISTRY
·
2025
·
IF 6.7
Wanru Tian,Xin Zhao,Yao Li,Xuan Cheng,Zheng Yang,Peisen Zhang,Mingxia Jiao,Xiliang Luo
Encephalitis, a severe inflammatory brain condition, poses significant diagnostic challenges due to its heterogeneous symptoms and the limitations of conventional imaging techniques, such as magnetic resonance imaging (MRI), which often fail to detect early or subtle lesions. To address this clinical need, herein, a near-infrared (NIR) optical imaging strategy using engineered silver indium selenide quantum dots (QDs) was developed for precise and early detection of microencephalitic lesions. The QDs were synthesized via a robust aqueous-phase method with optimized NIR emission intensity through suppression of nonradiative recombination pathways. Surface modification with carboxyl-terminated poly(ethylene glycol) (carboxyl-PEG) enhanced colloidal stability, biocompatibility, and selective uptake capabilities by disease-associated M1 macrophages, improving localization at inflammatory sites. In vivo studies demonstrated the outstanding imaging performance of QDs, with encephalitis lesions clearly delineated at ultrahigh spatial resolution, enabling reliable detection of microinflammatory foci as small as 4.6 mm × 5.3 mm. This breakthrough capability facilitates early diagnosis by resolving sub-5 mm lesions, surpassing the sensitivity and resolution of conventional methods for the first time. By providing a noninvasive, high-resolution diagnostic tool, this technology holds potential for improving clinical decision-making and patient outcomes in encephalitis and other neuroinflammatory disorders, particularly in resource-limited settings where early diagnosis remains challenging.
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Surfaces and Interfaces
·
2025
·
IF 6.3
Muhammad Sanaullah Shah,Zhang Zhenyu,Sohail Ahmad,Wang Shuiying,Hou Hongying,Zuo Xiaoqing,Muhammad Zia Ullah Shah
The development of supercapacitor technology has advanced significantly because of the high need for efficient and sustainable energy storage solutions. This study investigates the synthesis and electrochemical performance of NiSe 2 -ZnS nanocomposites as promising electrode materials for high-performance supercapacitor. The NiSe 2 -ZnS nanocomposites were synthesized via simple chemical method, and characterized. The results showed that the NiSe 2 -ZnS composite have outstanding electrochemical behaviors, combining the superior chemical stability and thermal durability of NiSe 2 with the remarkable electrical conductivity of ZnS. The NiSe 2 -ZnS hybrid electrode demonstrated remarkable electrochemical behavior, delivering a specific capacitance of 810 F g -1 in a three-electrode system and 87.3 F g -1 when evaluated in a two-electrode configuration. It also demonstrated a notable ED of 27.2 Wh/kg and a high PD of 3744.7 W/kg. Notably, the electrode retained 96.7% of its original capacitance even after 5000 continuous charge-discharge cycles conducted under a current load of 15 A g -1 , demonstrating excellent cycling durability. This research shows that NiSe 2 -ZnS nanocomposites is a good-performance, low-cost, and sustainable material for next-generation supercapacitors.
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ACS Catalysis
·
2025
·
IF 13.1
Rui Zhai,Zhenyu Wang,Chang Huang,Chao Zeng,Mengyue Gu,Tianqi Wang,Fanqi Bu,Shaobin Wang,Jinying Zhang
Phosphorus has various crystallographic structures and variable phosphorus-derived structures, which have attracted much attention due to its unique properties. One-dimensional phosphorus structures with atomic substitution in the phosphorus lattice are extremely favored due to their high specific surface area and stable single-atom dispersion. The precise crystal structures and single atomic substitution positions are crucial factors to understand the mechanism of single-atom effects but remain a big challenge. Herein, single crystals composed of 1D zigzag linear phosphorus selenium chains (ZLP-Se) have been produced and characterized by SC-XRD to be P18.56Se1.44 with a space group of Pnma (CSD-2348033). The exact Se substitution positions were further ascertained by calculations of the whole thermodynamic stability phase diagram to have three types of substitution patterns (Se1/P1 mixed occupied positions with intervals of 3Se+2P, 1Se+4P, and 1Se+1P+1Se+2P). The selenium-rich crystal plane (-10-1) has been demonstrated to significantly enhance CO2 adsorption and C−C coupling to obtain ethylene (C2H4). A high photocatalytic CO2 reduction performance (18.0 μmol g−1 h−1, 97.0% electron selectivity for C2H4) has been achieved by the ZLP-Se with the Ag cocatalyst. The adsorption of CO2* and CO* was found to be much stronger on the Se-rich surface of ZLP-Se. The CO* intermediates were found to be energetically favored for protonation and subsequent asymmetrical C−C coupling to produce C2H4, with COCHO* intermediates detected by in situ DRIFTS. The electron was also demonstrated by in situ XPS to transfer from Se and Ag to P under Xe lamp irradiation, confirming the electronic localization effect of ZLP-Se to yield C2H4.
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FOOD CHEMISTRY
·
2025
·
IF 9.8
Yiting Yan,Fanghua Liu,Zihan Liu,Lin Yang,Miao Hu,Jun Zhang,Tong Xu,Yongjian Ai,Xue Jiang
Formaldehyde, a known carcinogen, has been used illegally as a multipurpose food ingredient. However, unapproved use poses serious health risks, necessitating rapid food safety detection. Electrochemical sensing has emerged as a viable platform for formaldehyde detection and analysis because of its straightforward operation and high sensitivity. In this paper, we propose a plasma-assisted nanostructure method to prepare selenium-rich NiSe 2 /Co 3 Se 4 heterointerfaces (NiSe 2 /Co 3 Se 4 @N-C) in ultrathin N-doped carbon matrix using NiCo-MOF precursors synthesized by dielectric blocking discharge (DBD) microplasma and selenation process. Three synergistic mechanisms are integrated into the hierarchical architecture: conductive carbon scaffolds creating electron highways, selenium vacancies enhancing reactant adsorption through localized electron enrichment, and heterojunctions facilitating interfacial charge transfer via built-in electric fields. The sensor has remarkable analytical capabilities, including a sub-ppm detection limit (3.94 μM), linear range (8–500 μM), and high stability. The defect-engineering and heterostructure design paradigm open new possibilities in food safety monitoring.
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JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
·
2025
·
IF 4.9
Guijin Yang,Chen Cheng,Yujun Fu,Dongyang Fang,Yiran Mao,Jinyun Li
Developing low-cost, high efficient, and durable non-precious metal electrocatalysts for is for the oxygen evolution reaction (OER) is pivotal for advancing sustainable water electrolysis toward commercial hydrogen production. Herein, CoSe 2 @NiSe 2 /NF heterostructured electrocatalysts were prepared on three-dimensional nickel foam (NF) substrate by facile solution selenization combined with hydrothermal method. The as-prepared catalyst with heterostructure and interconnected flake-like structures optimizes OH − intermediate adsorption and accelerates charge transfer at the CoSe 2 /NiSe 2 interfaces, exposes abundant active sites to facilitate mass transport and electrochemical reactions, then boosts the OER performance. Electrochemical measurements demonstrate that the CoSe 2 @NiSe 2 /NF-2 catalyst exhibits an overpotential of 229 mV, a Tafel slope of 43.1 mV/dec, and stable operation for 100 h at 10 mA/cm 2 . Notably, it maintains exceptional durability under industrial-relevant conditions, sustaining stable performance for 400 h at a high current density of 1 A/cm 2 . This work provides a new idea for constructing heterostructured electrocatalysts with optimized electronic structures and robust stability, offering promising insights for the design of high-performance OER catalysts toward practical water-splitting applications.
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Nature Electronics
·
2025
·
IF 40.9
He Jing,Ge Jifeng,Xue Junying,Xia Tingyi,Dai Yongping,Wang Shengqi,Li Wenjie,Lin Zhaoyang
Solution-processed two-dimensional semiconductors could be used to create electronic devices on large scales and at low cost. However, the electronic performance of devices based on such materials is typically below that of devices based on materials grown via high-temperature chemical vapour deposition. Here we report the fabrication of indium selenide (InSe) semiconductor thin films using a colloidal solution of monolayer nanosheets (monolayer purity more than 98%). The InSe thin films are assembled on 4-inch wafers with conformal and intimate van der Waals contacts between the monolayer building blocks. We use the solution-processed films to fabricate InSe transistors that exhibit electron mobilities of 90–120 cm 2 V −1 s −1 , current on/off ratios of up to 10 7 and a small current hysteresis. We also show that InSe transistors with oxide encapsulation can remain stable in air for 3 months.
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