Nature Communications
·
2022
·Vol. 13
·期 1
·1-11
·
IF 17.694
Liu Haodong,Du Chengfeng,Liao Liling,Zhang Hongjian,Zhou Haiqing,Zhou Weichang,Ren Tianning,Sun Zhicheng,Lu Yufei,Nie Zhentao,Xu Feng,Zhu Jixin,Huang Wei
Hydrogels are investigated broadly in flexible sensors which have been applied into wearable electronics. However, further application of hydrogels is restricted by the ambiguity of the sensing mechanisms, and the multi-functionalization of flexible sensing systems based on hydrogels in terms of cost, difficulty in integration, and device fabrication remains a challenge, obstructing the specific application scenarios. Herein, cost-effective, structure-specialized and scenario-applicable 3D printing of direct ink writing (DIW) technology fabricated two-dimensional (2D) transition metal carbides (MXenes) bonded hydrogel sensor with excellent strain and temperature sensing performance is developed. Gauge factor (GF) of 5.7 (0 − 191% strain) and high temperature sensitivity (−5.27% °C −1 ) within wide working range (0 − 80 °C) can be achieved. In particular, the corresponding mechanisms are clarified based on finite element analysis and the first use of in situ temperature-dependent Raman technology for hydrogels, and the printed sensor can realize precise temperature indication of shape memory solar array hinge.
研究领域:
材料科学
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纳米技术
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传感器
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3D打印
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柔性电子
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DOI
PubMed
高影响因子
Journal of Energy Storage
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2023
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IF 9.4
Wei Yang,Zheng Yang,Jing Wang,Wei Lu,Weihua Wang
MXenes materials are novel promising candidates for the next generation energy storage devices. In this work, we designed a facile avenue using biomass derived carbons (PCarbons) and Nb 2 C MXenes as raw materials via sonication treatment to obtain Nb 2 C-PCarbons composites (Nb 2 C-PCarbons CPs). As a result, the prepared Nb 2 C-PCarbons CPs achieved a relative high specific capacitance up to 465.6 F·g −1 in the three-electrode system with 6 M KOH electrolyte. The fabricated symmetric supercapacitors (SSCs) displayed the ultra-high energy density (126.9 Wh·kg −1 ) in ion liquid electrolyte and the long cycling life after 10,000 cycles. Meanwhile, the obtained Nb 2 C-PCarbons CPs were also applied as cathode materials in the aqueous zinc ion batteries (AZIBs), achieving the maximum discharge specific capacity of ca. 239.7 mAh·g −1 with good cycling stability. Thus, our work provides an efficient method to modify the MXenes as bi-functional materials for the potential high-value utilization in SSCs and AZIBs.
研究领域:
材料科学
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能源存储
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纳米技术
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电化学
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DOI
高影响因子
FOOD CHEMISTRY
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2021
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IF 7.514
Zhihui Wu,Da-Wen Sun,Hongbin Pu,Qingyi Wei,Xuanran Lin
Mycotoxin B1 (AFB1) contamination in agricultural products pose a deadly danger to animal and human health and its rapid and reliable detection is thus very important. Herein, a ratiometric surface-enhanced Raman scattering (SERS) aptasensor for AFB1 detection was developed, in which 1,2-bis(4-pyridyl) ethylene (BPE) was used to trigger the assembly of Au nanoparticle dimers (AuNP dimers) and form intensive SERS “hot spots”, and MXenes nanosheets could load aptamer-modified AuNP dimers due to the hydrogen bonding and the chelation between the phosphate groups of aptamers and the Ti ion of MXenes. With the presence of AFB1 preferentially binding to AFB1 aptamer, AuNP dimers were separated from MXenes nanosheets, leading to a decrease in SERS intensity. Regression analysis in the range from 0.001 to 100 ng·mL −1 showed the limit of detection (LOD) being 0.6 pg·mL −1 in standard solution, indicating that the great prospects of the AuNP dimers/MXenes SERS substrate for detecting AFB1.
研究领域:
分析化学
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纳米技术
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食品安全
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毒理学
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DOI
PubMed
高影响因子
MICROCHIMICA ACTA
·
2021
·Vol. 188
·期 2
·1-12
·
IF 5.833
Hong Juncheng,Wang Wenhai,Wang Jiaqi,Wang Xiao,Xie Hongzhen,Li Tianhua,Gan Ning
A pair of composite probes based on aptamer modified polyhedral oligomeric silsesquioxane-perovskite quantum dots (POSS-PQDs-Apt) as signal probe and titanium carbide (Ti 3 C 2 ) MXenes as quencher were prepared for the first time. They were employed to fabricate one turn-on–type aptasensor relying on fluorescence resonance energy transfer (FRET) for Vibrio parahaemolyticus (VP) determination. The POSS-PQDs-Apt can be adsorbed on the MXenes nanosheets, and its fluorescence was quenched due to the FRET. After the composite probes were incubated with VP for 50 min, the POSS-PQDs-Apt binding with VP can be released from the surface of MXenes, and the signal recovered due to its higher affinity to the VP than MXenes. The fluorescence intensity from 519 nm emission of the system was measured at 480 nm excitation. Under In optimized conditions, the assay can determine VP in the concentration range 10 2 - 10 6 cfu/mL, and the detection limit (LOD) was 30 cfu/mL using fluorescence detection. The LOD is still 100 cfu/mL by naked eye detection which is proper for on-line monitoring VP in aquaculture water. This method was also used to detect VP in actual samples of seawater, the recovery of spiked samples was between 93% and 106%, and relative standard deviation (RSD) was between 2.7% and 6.7%. The result is consistent with the plate count. Therefore, this assay could provide a candidate platform for screening VP in aquaculture industry. Graphical abstract
研究领域:
生物传感器
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分析化学
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环境监测
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PubMed
高影响因子
BIOSENSORS & BIOELECTRONICS
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2021
·
IF 10.618
Yan Sun,Peipei Li,Yu Zhu,Xiaohua Zhu,Youyu Zhang,Meiling Liu,Yang Liu
A sensitive electrogenerated chemiluminescence (ECL) biosensor for glucose was developed based on in situ growth of TiO 2 nanowires on Ti 3 C 2 MXenes (TiO 2 –Ti 3 C 2 ) as the nanoplatform. Via tuning the alkaline oxidation time, different amount of TiO 2 nanowires can be found on MXenes. An ECL biosensor for glucose was constructed by covalent immobilization of glucose oxidase (GODx) on the glycine functional TiO 2 –Ti 3 C 2 surface, with the ECL signal depending on the in-situ formation of H 2 O 2 via the specifically catalysis of glucose by GODx, resulting in the apparent increase of ECL signal. The TiO 2 –Ti 3 C 2 can also act as the catalyst for the oxidation of H 2 O 2 into O 2 to enhance the ECL of luminol. Based on this strategy, a highly sensitive ECL biosensor for glucose was obtained in wide concentration range of 20 nM-12 mM with a low detection limit of 1.2 nM (S/N = 3). The synergistic effects of large surface area, excellent conductivity, and high catalytic activity of the TiO 2 –Ti 3 C 2 make the sensor highly sensitive toward glucose; the specific enzyme catalysis reaction promises excellent selectivity of the ECL sensor. The proposed biosensor has been employed to detect glucose in human serum, fruits, and sweat samples with excellent performance, providing a universal approach for glucose in various samples, which shows great prospect in clinical diagnostics and wearable sensors .
研究领域:
分析化学
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生物传感器
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材料科学
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生物医学工程
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临床诊断
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DOI
PubMed
高影响因子
ENERGY & FUELS
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2023
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IF 5.3
Lu Qin,Jianjian Zhong,Jianling Li
A prominent topic in related fields is the search for cathode materials for aluminum-ion batteries (AIBs) with high specific capacity and outstanding cycle performance. MXenes, a two-dimensional layered material, can be used for a variety of energy storage purposes. However, their application in AIBs is hampered by poor capacity and significant self-accumulation. In this study, we employ a simple two-step process, first electrostatically adsorbing Cu2+ on MXenes and then in situ selenizing MXenes layers to produce TiSe2. The composite product F-Ti3C2Tx@Cu@TiSe2 exhibits an initial discharge specific capacity of 360.3 mAh g–1, and the capacity remains at 267.5 mAh g–1 after 100 cycles. In contrast, the directly selenized F-Ti3C2Tx@TiSe2 without Cu2+ shows a capacity of just 77.2 mAh g–1 after 100 cycles. This huge improvement is due to the fact that the electrostatic adsorption of Cu2+ on MXenes induces polarized sites with high electron density and optimizes the spatial structure of MXenes. This phenomenon effectively alleviates self-accumulation, providing a larger specific surface area and making it easier for [AlCl4]− to embed and escape. Through the X-ray photoelectron spectroscopy test and charge and discharge curves, it is found that the main capacity of the material comes from the redox reaction of [AlCl4]− and selenides in AIBs. Herein, the utilization of Cu2+ adsorbed MXenes as precursors followed by in situ selenization is innovative and also validates the great potential of Cu2+ adsorption in the field of electrochemistry.
研究领域:
材料科学
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电化学
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高影响因子
Small Methods
·
2023
·Vol. 7
·期 6
·2300302
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IF 12.4
Ling Lei,Jiaxi Yin,Kangbing Wu,Nianjun Yang
2D MXenes are widely proved to be potential electrode materials, although the size effect on their electrochemistry is not fully understood. In this work, Ti 3 C 2 T x nanoflakes are prepared through acidic etching of Ti 3 AlC 2 powders, followed by the intercalation treatment with tetrapropylammonium hydroxide. Such a method produces large-scale delaminated and oxygenated nanoflakes. With aid of centrifugation, the nanoflakes with varied lateral sizes and thicknesses are collected, where electrochemical response of charged redox probes and polar phenol molecules is varied. Density functional theory and energy dispersive spectroscopy confirm such electrochemical response is dependent on the size and thickness of used nanoflakes, more exactly the oxygen content on their surface. Taking the nanoflakes obtained using a centrifugal speed of 5000 rpm (MX-TPA 0.2 ) as an example, they feature good dispersibility, a high oxygen content, a small size, and a thin thickness. On these nanoflakes electrochemical response of polar p -substituted phenols is pronounced, stemming from a strong electron-withdrawing interaction of their oxygenated termination with the Ar-OH. A sensitive electrochemical sensor is further constructed for the detection of p -nitrophenol. This work thus provides an approach to synthesize MXenes with different sizes and thicknesses as well as further to reveal size-dependent electrochemistry of MXenes.
研究领域:
材料科学
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电化学
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纳米技术
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DOI
PubMed
高影响因子
NATURE
·
2026
·Vol. 656
·期 8126
·86-91
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IF 56.1
Fang Qian,Wang Liming,Chang Kai,Yang Hongxin,Yan Pu,Cao Kecheng,Li Mian,Xue Jianming,Ouyang Xiaoping,Chai Zhifang,Huang Qing
Two-dimensional (2D) magnetic semiconductors are crucial for next-generation information storage and spintronic technologies 1 , 2 . MXenes, owing to compositional diversity and tunable properties, provide a platform for designing functional materials 3 , 4 , 5 . Incorporating lanthanides (Ln) introduces localized 4 f electrons with strong spin polarization, while potentially enabling semiconducting behaviour, offering a viable route to magnetic semiconductors 6 , 7 . However, the scarcity of MAX precursors and the susceptibility of Ln to dissolution in common etchants (for example, HF), compared with other M elements such as Mo, hinder the synthesis of lanthanide MXenes (Ln 2 CT 2 ) by conventional ‘top-down’ etching 8 . Here we propose a general ‘bottom-up’ methodology for synthesizing Ln 2 CT 2 (Ln = Gd, Tb, Dy, Ho, Er, Lu; T = Cl, Br) using layered halides as van der Waals building blocks. Multilayer Ln 2 CT 2 exhibits composition-tunable properties, characterized by optical absorption onsets spanning 1.26–1.71 eV, room-temperature resistivity of 0.329–36.1 Ω cm with a negative temperature coefficient, and low-temperature ferromagnetic hysteresis at 2 K accompanied by positive Curie–Weiss temperatures between 6 K and 59 K. Theoretical calculations show that the d -electron states around the Fermi level ( E f ) are largely diminished in bare Ln 2 C, whereas surface terminals further exhaust these states to open band gaps. Meanwhile, the highly localized 4 f electrons in Ln 2 CT 2 , located far from the E f , contribute to the spin splitting for the observed ferromagnetic behaviour. This combination of semiconducting and magnetic properties makes Ln 2 CT 2 a valuable candidate for spintronic device applications.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Jie Xu,Xueying Yang,Yongjin Zou,Luping Zhu,Fen Xu,Lixian Sun,Cuili Xiang,Jian Zhang
MXenes have a broad application in electrochemical energy storage. However, the smooth surface of high-density MXenes makes it difficult to stabilize the anchored active material. In this study, ultrathin Ti 3 C 2 MXenes were doped with a high density of NiMoS 4 nanoparticles with the assistance of dopamine (DA). DA was adsorbed by the Ti 3 C 2 surface (Ti 3 C 2 -DA) to form a negatively charged layer, which was beneficial for the enrichment of metal ions. NiMoS 4 was anchored to Ti 3 C 2 -DA via a hydrothermal reaction . The resultant Ti 3 C 2 -DA-NiMoS 4 heterostructure increased the exposure of NiMoS 4 active sites, and reduced the decrease in specific capacitance caused by volume changes. Consequently, Ti 3 C 2 -DA-NiMoS 4 exhibited excellent electrochemical performance with a high specific capacitance of 1288 F g −1 at 1 A g −1 . In addition, an asymmetric supercapacitor based on a Ti 3 C 2 -DA-NiMoS 4 positive electrode achieved a high energy density of 40.5 Wh kg −1 at 810 W kg −1 , and demonstrated excellent cycling stability (capacitance retention of 89% after 9000 cycles at 10 A g −1 ). These results demonstrate that the Ti 3 C 2 -DA-NiMoS 4 heterostructure is a prospective candidate material for high-performance supercapacitors.
研究领域:
材料科学
·
电化学能源存储
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DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2026
·
IF 19.9
Kaiyang Guo,Wenzheng Yan,Yan Liu,Jinshuo Zou,Jianhua Zhu,Zhuosen Wang,Yapeng Tian,Xinwei Cui
The rational design of proton-based energy storage systems requires a fundamental understanding of proton behavior under nanoscale confinement. Herein, we elucidate the desolvation dynamics and charge-transfer mechanisms of confined protons within interlayer-engineered Ti 3 C 2 T x MXenes through a combined theoretical and experimental approach. Density functional theory (DFT) calculations reveal that proton transport strongly depends on the interlayer spacing: when the gallery distance exceeds 0.6 nm, hydrated protons (H 5 O 2 + ) undergo efficient desolvation and interfacial charge transfer, whereas narrower spacing traps protons in a suspended, fully solvated state, thereby impeding charge transport. Guided by these insights, Mo-doped MXenes (Mo-MXene) with tunable interlayer spacing were synthesized, exhibiting enlarged galleries and enhanced surface charge density. The optimized Mo-MXene-based hybrid supercapacitors deliver a high volumetric energy density of 94.2 Wh L −1 at a power density of 398.9 W L −1 , and more importantly, maintain an impressive energy density of 74.0 Wh L −1 even at an ultrahigh power density of 156.7 kW L −1 . This study establishes interlayer spacing as a decisive structural parameter governing proton desolvation and electron-transfer coupling, providing a universal design strategy for high-rate, high-capacitance proton-based electrochemical energy storage systems.
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高影响因子
Nature Communications
·
2026
·
IF 18.1
Liu Minmin,Yang Liting,Chen Guanyu,Wu Zhengchen,Yang Xiaofen,Liang Guisheng,Che Renchao
Terminational chemistry traditionally influences MXenes’ carrier concentration and inter-flake spacing, and thereby electronic properties. Herein, the unusual terminational effect on the periodic atomic displacement, namely ripple, has been demonstrated. The rippling structure strongly depends on the atomic radii of halogen terminations, including -Cl, -Br, and -I. This originates from the atomic response to local strain fluctuation induced by terminations. The atomic ripple in Ti 3 C 2 Br x enhances electric coupling among adjacent atoms and promotes their charge transfer, thereby improving the electrical conductivity. Meanwhile, it significantly strengthens dielectric properties and markedly boosts the electromagnetic wave absorption capability. The maximum reflection loss value reaches −44.33 dB, and the effective absorption bandwidth is up to 3.94 GHz with a matching thickness of 1.40 mm. This work elucidated the effect of MXenes’ microstructure on their dielectric properties on the atomic scale and paved an avenue for the development of MXenes-based devices.
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高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2017
·
IF 2.084
Zheng Wei,Zhang Peigen,Tian Wubian,Qin Xia,Zhang Yamei,Sun ZhengMing
To modify the adsorption performance of Ti 3 C 2 T x MXene , we report a facile approach to expand the interlayer spacing of Ti 3 C 2 T x and to tune its surface functional groups by hot alkaline solution treatment. In the treatment, the interlayer spacing of Ti 3 C 2 T x MXene is increased by up to 29% by LiOH, and the surface functional groups are tuned by converting -F to -OH. Among the MXenes, LiOH-Ti 3 C 2 T x and NaOH-Ti 3 C 2 T x can faster adsorb methylene blue (MB) than other MXene adsorbents; NaOH-Ti 3 C 2 T x possesses the highest adsorption capacity (189 mg/g) for MB, which can be ascribed to the cooperation of surface adsorption and intercalation adsorption. The experimental data suggest that the enhanced adsorption toward cationic dyes can be best described by a Langmuir isotherm.
研究领域:
材料科学
·
环境科学
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DOI
高影响因子
危险品化学品经营许可证（带存储）