Nature Communications
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2022
·Vol. 13
·期 1
·1-9
·
IF 17.694
Zhang Jiaxi,Zhang Longhai,Liu Jiamin,Zhong Chengzhi,Tu Yuanhua,Li Peng,Du Li,Chen Shengli,Cui Zhiming
The sluggish kinetics of the hydrogen evolution reaction in base has resulted in large activity gap between acidic and alkaline electrolytes. Here, we present an intermetallic IrMo electrocatalyst supported on carbon nanotubes that exhibits a specific activity of 0.95 mA cm −2 at the overpotential of 15 mV, which is 14.4 and 9.5 times of those for Ir/C and Pt/C, respectively. More importantly, its activities in base are fairly close to that in acidic electrolyte and the activity gap between acidic and alkaline media is only one fourth of that for Ir/C. DFT calculations reveal that the stably-adsorbed OH spectator at Mo site of IrMo can stabilize the water dissociation product, resulting in a thermodynamically favorable water dissociation process. Beyond offering an advanced electrocatalyst, this work provides a guidance to rationally design the desirable HER electrocatalysts for alkaline water splitting by the stably-adsorbed OH spectator.
研究领域:
材料科学
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电化学
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催化
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可再生能源
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PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2022
·
IF 9.136
Yiyun Cao,Lvji Yan,Haiyin Gang,Bichao Wu,Dun Wei,Haiying Wang
The application of traditional electrode materials for high-performance capacitive deionization (CDI) has been persistently limited by their low charge-storage capacities and slow salt removal rates. In order to improve the electrochemical performance, cobalt‑vanadium coated porous carbon gradient hollow spheres (Co 3 V 2 O 8 @C) with large internal spacing, and high pore structure was prepared in this paper to improve the ion mobility. The structure with the following characteristics: (1) Co 3 V 2 O 8 @C with a reversible ionic insertion/de-insertion and good electrical conductivity ; (2) the increased lattice spacing effectively mitigates volume expansion during prolonged cycling; (3) it increases the utilization rate of the active center inside the electrode material and shows high electrochemical adsorption capacity by being applied to capacitive deionization. When applied to CDI, Co 3 V 2 O 8 @C has top CDI performance compared to the currently reported cobalt-based electrode materials. The holding capacities for different ions (Cl − , SO 4 2− , NO 3 − , and Na + ) were 160, 161, 244, and 69 mg·g −1 with good cycling stability after 100 h. Our research provides a reasonable pathway for building the structure of high-capacity cobalt-based electrodes and further promoting the development of high-performance CDI electrode materials.
研究领域:
材料科学
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环境工程
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高影响因子
Inorganics
·
2023
·Vol. 12
·期 1
·1
·
IF 2.9
Zan Wang,Yunjiao Gu,Daniil Aleksandrov,Fenghua Liu,Hongbo He,Weiping Wu
Silver-based chalcogenide semiconductors exhibit low toxicity and near-infrared optical properties and are therefore extensively employed in the field of solar cells, photodetectors, and biological probes. Here, we report a facile mixture precursor hot-injection colloidal route to prepare Ag2TexS1−xternary quantum dots (QDs) with tunable photoluminescence (PL) emissions from 950 nm to 1600 nm via alloying band gap engineering. As a proof-of-concept application, the Ag2TexS1−xQDs-based near-infrared photodetector (PD) was fabricated via solution-processes to explore their photoelectric properties. The ICP-OES results reveal the relationship between the compositions of the precursor and the samples, which is consistent with Vegard’s equation. Alloying broadened the absorption spectrum and narrowed the band gap of the Ag2S QDs. The UPS results demonstrate the energy band alignment of the Ag2Te0.53S0.47QDs. The solution-processed Ag2TexS1−xQD-based PD exhibited a photoresponse to 1350 nm illumination. With an applied voltage of 0.5 V, the specific detectivity is 0.91 × 1010Jones and the responsivity is 0.48 mA/W. The PD maintained a stable response under multiple optical switching cycles, with a rise time of 2.11 s and a fall time of 1.04 s, which indicate excellent optoelectronic performance.Keywords:Ag2TexS1−xQDs;ternary alloying;band gap engineering;photodetectors
研究领域:
材料科学
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光电子学
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高影响因子
INORGANIC CHEMISTRY
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2023
·
IF 4.6
Hao-Ran Chen,Min Wan,Zi-Mu Li,Wen-He Zhong,Si-Yu Ye,Qiang-Qiang Jia,Jun-Yi Li,Li-Zhuang Chen
Molecular ferroelectric materials are widely applied in piezoelectric converters, non-volatile memorizers, and photovoltaic devices due to their advantages of adjustable structure, lightweight, easy processing, and environmental friendliness. However, designing multifunctional molecular ferroelectrics with excellent properties has always been a great challenge. Herein, a multiaxial molecular ferroelectric is successfully designed by modifying the quasi-spherical cation dabco with CuBr2 to obtain halogenated [Bretdabco]CuBr4 (Bretdabco = N-bromoethyl-N′-diazabicyclo [2.2.2]octane), which crystallizes in polar point groups (C6). Typical ferroelectric behaviors featured by the P–E hysteresis loop and switched ferroelectric domain are exhibited. Notably, the molecular ferroelectric shows a high TC of 460 K, which is rare in the field and could greatly expand the application range of this material. In addition, the band gap is adjustable through the regulation of halogen. Both the UV absorption spectra and theoretical calculations indicate that the molecular ferroelectrics belong to a direct band gap (2.14 eV) semiconductor. This tunable and narrow band gap semiconductor molecular ferroelectric material with high TC can be utilized more effectively in the study of optoelectronics and sensors, including piezoelectric energy harvesters. This research may provide a promising approach for the development of multiaxial molecular ferroelectrics with a tiny band gap and high TC.
研究领域:
材料科学
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电陶瓷
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铁电材料
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光电
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半导体物理
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DOI
PubMed
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2023
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IF 4.4
Ming Chen,Xing Zhao,Bin Wang,Hongliang Liu,Zhixiang Chen,Lu Sun,Xiaoxuan Xu
Multifunctional nanoplatform that combine imaging, diagnostic, and therapeutic functions into a single agent have great significance for the early diagnosis and efficient treatment of diseases, particularly tumors. In this study, we report on a novel graphene-wrapped petal-like gap-enhanced Raman tags with mesoporous silica shells (MS-GP-GERTs). These MS-GP-GERTs have 4-NBT Raman reporters embedded in the gap between the gold nanocore and the petal-shaped shell and are wrapped in graphene and mesoporous silica. The results of photothermal measurement experiments show that graphene layers significantly enhanced the photothermal effect of gap-enhanced Raman tags (GERTs). The photothermal conversion efficiency of MS-GP-GERTs reaches 40.8%, comparable to pure graphene. Moreover, MS-GP-GERTs show good photothermal performance in agarose phantoms, heating the phantom to 47 °C within 5 min under a low power density laser (0.5 W/cm 2 ). MS-GP-GERTs also exhibit excellent photothermal stability and physiological environment stability, making them a promising candidate for repeated photothermal therapy. Raman spectra and mapping imaging experiments demonstrate MS-GP-GERTs' low detection limit (100 fM), large imaging depth (2.74 mm), and excellent ability to image simulated biological tissue and cells. This novel Raman tag has the potential to become a multifunctional nano platform for integrating Raman imaging diagnosis and photothermal therapy.
研究领域:
生物医学工程
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纳米医学
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分子影像学
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PubMed
高影响因子
Results in Physics
·
2024
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IF 4.4
Fazal Kabir,Adil Murtaza,Wasif ur Rehman,Awais Ghani,Sen Yang
Diluted magnetic semiconducting nanostructures are attractive materials for spintronics applications. This study focuses on the fabrication of (Gd, Fe) co-doped ZnO nanoparticles (NPs). X-ray diffractogram analysis confirms a monophase hexagonal wurtzite structure, matching JCPDS file number (36–1451). The Scherrer equation and Williamson-Hall plot are used to measure crystal size and strain, respectively. Scanning electron microscopy reveals a spherical surface morphology, and energy-dispersive X-ray analysis confirms elemental composition. Transmission electron microscopy shows average diameter of 17–52 nm and fringe spaces of 0.269–0.245 nm. The incorporation of dopant ions leads to a slight reduction in the bandgap. The Fe3+ and Gd3+ oxidation states of the dopant elements are confirmed using X-ray photoelectron spectroscopy. Functional groups are identified via Fourier transform spectroscopy, and structural defects are identified by photoluminescence analysis. Pristine ZnO NPs exhibit diamagnetic behavior, while the doped samples demonstrate ferromagnetic properties. The observed ferromagnetism in the doped NPs is attributed to bound magnetic polaron interactions. Electron paramagnetic resonance spectroscopy detects unpaired electrons in samples, with g factor values of approximately 2. The co-doping of Gd and Fe presents a promising approach for achieving ferromagnetism in ZnO systems, offering significant potential for advancement in spintronics technology.
研究领域:
材料科学
·
物理学
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高影响因子
INORGANIC CHEMISTRY
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2022
·
IF 5.436
Wenlong Xie,Yihan Yun,Lihan Deng,Guangmao Li,Shilie Pan
The development of high-power solid-state lasers is in urgent need of new infrared nonlinear optical (IR NLO) materials with a wide band gap and a high laser-induced damage threshold. A new infrared nonlinear optical material Na2Ga2SiS6 has been synthesized for the first time, crystallizing in the Fdd2 (no. 43) noncentrosymmetric space group. Its three-dimensional tunnel framework consists of two typical NLO active motifs [GaS4] and [SiS4], with Na+ cations located inside the tunnels. Na2Ga2SiS6 exhibits comprehensive optical properties, namely, a wide transmission range, a high laser-induced damage threshold (10 × AgGaS2), a type-I phase-matching second-harmonic generation response (0.2 × AgGaS2), and especially a wide band gap (3.93 eV), which is the largest in the A2MIII2MIVQ6 (A = alkali metals; MIII = IIIA elements; MIV = IVA elements; Q = S and Se) family. Therefore, Na2Ga2SiS6 does not produce two-photon absorption under a 1064 nm laser pump and could be used in high-energy laser systems, which makes Na2Ga2SiS6 a promising candidate for high-energy IR NLO applications.
研究领域:
材料科学
·
光学
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DOI
PubMed
高影响因子
Analytical Methods
·
2020
·Vol. 12
·期 26
·3361-3367
·
IF 2.596
Wenshuai Li,Guorui Wu,Min Wang,Aiqin Yue,Weijun Du,Dingbin Liu,Jinzhong Zhao
Class A saponins are responsible for the taste of soybean products, and the rapid identification of class A saponins from soybean food is essential for both food safety and cultivar screening. In this study, we propose a colorimetric assay based on the coupling of gap ligase chain reaction (Gap-LCR) with DNAzyme to detect the target GmSg-1 genes of class A soybean saponins with the naked eye, without the involvement of expensive instruments. The limits of detection (LODs) for the GmSg-1a and GmSg-1b genes were determined to be 0.1618 and 0.1625 μM, respectively, with a linear range of 0.2–1.2 μM. The DNAzyme-based Gap LCR assay was successfully employed to identify the target genes from different soybean cultivars, providing a simple means for monitoring the quality of soybean products.
研究领域:
食品科学
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分子生物学
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分析化学
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PubMed
高影响因子
Carbon Energy
·
2024
·Vol. 6
·期 9
·e535
·
IF 19.5
Zhimin Niu,Yan Gao,Tianhui Wu,Fei Zhang,Ran Zhao,Zijia Chen,Yiming Yuan,Tifeng Jiao,Jianmin Gu,Li Lu,Desong Wang
Rechargeable neutral aqueous zinc−air batteries (ZABs) are a promising type of energy storage device with longer operating life and less corrosiveness compared with conventional alkaline ZABs. However, the neutral ZABs normally possess poor oxygen evolution reactions (OERs) and oxygen reduction reactions performance, resulting in a large charge–discharge voltage gap and low round-trip efficiency. Herein, we demonstrate a sunlight-assisted strategy for achieving an ultralow voltage gap of 0.05 V in neutral ZABs by using the FeOOH-decorated BiVO 4 (Fe-BiVO 4 ) as an oxygen catalyst. Under sunlight, the electrons move from the valence band (VB) of Fe-BiVO 4 to the conduction band producing holes in VB to promote the OER process and hence reduce the overpotential. Meanwhile, the photopotential generated by the Fe-BiVO 4 compensates a part of the charging potential of neutral ZABs. Accordingly, the energy loss of the battery could be compensated via solar energy, leading to a record-low gap of 0.05 V between the charge and discharge voltage with a high round-trip efficiency of 94%. This work offers a simple but efficient pathway for solar-energy utilization in storage devices, further guiding the design of high energy efficiency of neutral aqueous ZABs.
研究领域:
材料科学
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能源存储技术
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电化学
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DOI
高影响因子
OPTICS AND LASER TECHNOLOGY
·
2026
·
IF 5.2
Runcheng Liu,Jie Yan,Wen Yang,Mingshun Jiang
A fundamental challenge in surface plasmon resonance (SPR) sensing arises from the mutual interference between surface refractive index and bulk refractive index responses. In practice, strong plasmonic excitation and reliable bulk refractive index referencing are rarely compatible within a single sensing configuration. To address this long-standing limitation, we develop a high-performance tilted fiber Bragg grating (TFBG)-SPR sensing platform based on a hybrid gap-plasmonic architecture. By limiting the gold film thickness to 30 nm, evanescent field tunneling is retained, allowing the cutoff cladding mode to be excited and employed as an intrinsic bulk refractive index reference. The accompanying loss of plasmonic confinement associated with such thin coatings is compensated by the introduction of gold nanoparticles (AuNP) together with a thickness-tunable two-dimensional metal–organic framework (MOF) spacer. This combination promotes strong hybridization between localized and propagating plasmonic modes, creating nanoscale gaps that concentrate electromagnetic energy at the sensing interface. As a consequence, the SPR quality is substantially improved, while interference from the surrounding bulk medium is effectively suppressed. With this architecture, the platform achieves an amplitude sensitivity of 3925 dB/RIU, corresponding to a 2.28-fold enhancement relative to conventional gold-coated TFBG, while preserving stable self-referencing capability. The robustness of the dual-mode self-decoupling mechanism is further demonstrated through selective detection of Hg 2+ ions, in which weak surface-binding signals are reliably resolved in real time against background bulk fluctuations. These results establish a general and practical strategy for reconciling high sensitivity with robust surface and bulk signal decoupling in fiber-optic plasmonic sensing platforms.
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高影响因子
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
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2026
·
IF 7
Zhen Gui,Luheng Wang,Lijuan Lan,Dingyu Guo
High-precision real-time monitoring of gaps and pressure is essential in precision manufacturing and robotic manipulation. This study develops a transducer system based on a coil-shaped sensor made of carbon nanotube-filled silicone rubber composite material, capable of dual-mode detection of both gap and pressure. The system is supported by custom-developed hardware circuitry and host computer software. A critical impedance threshold is employed to distinguish between non-contact and contact processes, while the impedance change rate is used to differentiate loading and relaxation stages. The non-contact gap is determined using the impedance angle–gap relationship due to its higher sensitivity. The loading pressure is estimated through impedance magnitude–pressure calibration; during relaxation, the pressure is inversely interpolated using the magnitude–pressure relationships of adjacent calibration points (0.1/0.2/0.3/0.4 MPa). Experimental results indicate maximum errors of 3.0 % F.S. for gap measurement and 8.0 % F.S. for pressure measurement. This study lays a preliminary foundation for industrial applications in long-term gap/pressure monitoring.
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高影响因子
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
·
2025
·Vol. 122
·期 18
·e2503292122
·
IF 9.1
Hong Wang,Jiwen Guan,Guangxian Xu,Xavier Mercier,Jinyang Zhang,Haotian Guo,Tongzhu Yu,Huaqiao Gui,Teng Huang,Donald G. Truhlar,Zhandong Wang
Carbonaceous particles are widespread in combustion, atmospheric, extraterrestrial, and nanomaterials environments. Resonance-stabilized radicals (RSRs) are commonly identified in fuel combustion and pyrolysis processes and play an essential role in carbonaceous particle formation. Despite their importance, comprehensive experimental and mechanistic understanding of particle inception through RSR reactions is lacking. This work investigated particle size distribution, chemical composition, and thermal behavior of soot particles generated by the flow reactor pyrolysis reactions of typical RSRs, in particular, 1-indenyl, 1-methylnaphthyl, and 2-methylnaphthyl radicals, and by the pyrolysis of hydrocarbons with a variety of structures. Particle size distributions show soot particles with mobility diameters in an incipient-particle range of 1.3 to 1.6 nm. Laser desorption/ionization mass spectrometry results suggest that soot products consist of much larger covalently bound clusters (CBCs) than those observed in the gas phase. Under our experimental conditions, the CBCs exhibit a phase transition for particles with calculated molecular diameters of around 1.5 nm. Evaporation experiments and thermogravimetric analysis of the soot products reveal distinct thermal characteristics for small and large CBCs. These results implicate CBCs as bridges between gas-phase species and soot particles. The present work provides a soot-inception mechanism called RSR clustering (RSRC) that is characterized by the reactive clustering of RSRs. The RSRC mechanism contrasts with conventional soot formation models that attribute soot inception primarily to the aggregation of large-size polycyclic aromatic hydrocarbons.
研究领域:
燃烧学
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大气化学
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材料科学
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产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）