JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2024
·Vol. 107
·期 10
·6911-6920
·
IF 3.5
Ruixue Bai,Mian Li,Lingyan Feng,Qing Huang
The family of MAX phases and their two-dimensional derivative MXenes attract significant attention due to their unparalleled properties. Synthesis of MAX phases and MXene from biomass sources is important to expand their biology-related applications, while it remains a challenge. The present work explores the possibility to synthesize MAX phases and subsequently derive MXenes by using biomass precursor. Ti 3 AlC 2 MAX phase was synthesized by using glucose as the carbon source in molten salt. The conversion behavior from glucose to Ti 3 AlC 2 was investigated, and the conversion rate of carbon from glucose reached to 70.4% by optimizing the reaction conditions. The as-obtained Ti 3 AlC 2 can be derived into Ti 3 C 2 T x MXene and MXene quantum dots by common chemical treatments, which provides possibility for biomass-derived nanolaminates applying in biological applications such as biological catalysis, bioinstrumentation, and biological tracking.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Wei-qing An,Xiang-an Yue,Ji-rui Zou,Li-juan Zhang,Rong-jie Yan
In this study, we investigate the properties and behavior of interfacial water on solid silica surfaces and its implications for various applications. We utilize a combination of transmission electron microscopy (TEM), nuclear magnetic resonance, mass spectrometry, infrared, and Raman spectroscopy to explore the presence and characteristics of anomalous water on silica surfaces. Our findings reveal a stable, nanoscale layer of wall-bound water on the inner surface of silica tubes that persists under high vacuum and room temperature conditions. This layer is rich in hydrated hydrogen ions and exhibits a thickness that correlates with the density of hydroxyl groups in silica. Through additional experimentation, we demonstrate that reducing the density of silica hydroxyl groups causes the wall-bound water to return to a liquid state, highlighting the pivotal role of hydroxyl groups in the formation of this unique water layer. Our study offers valuable insights into the properties and behavior of interfacial water on solid surfaces and lays the foundation for potential applications in a wide range of fields, such as energy storage, drug delivery, environmental remediation, biological sample preparation, microfluidics, and nanofluidics. Future research will further explore the properties and behavior of interfacial water on different material surfaces and under various environmental conditions, laying the groundwork for technological innovation in related fields. By utilizing advanced approaches and fostering interdisciplinary collaboration, this research contributes significantly to our understanding of interfacial water and paves the way for the development of cutting-edge technologies that capitalize on its distinctive properties.
研究领域:
材料科学
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表面化学
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Science of Advanced Materials
·
2022
·Vol. 14
·期 3
·576-580
·
IF 1.067
Tang Si-Lu,Liu Ya-Lin,Li Xu-Ming,Chen Qian-Wen,Chen Heng-Yu,Zhou Ji-Li,Chen Liang,Gu Zi-Yi,Shao Shi-Xing,Qiao Pei-Zhi,Shen Guo-Dong,Yang Bing-Chuan
The core–shell TiO2 nano-layer spheres were synthesized by hydrothermal method without surfactant, using tetraisopropyl titanate, diethylenetriamine and water as the capping agents. The structure of the products was characterized with X-ray diffraction (XRD), transmission
electron microscope (TEM) and scanning electron microscopy (SEM). The possible formation mechanism and electrocatalytic degradation characters of the products were also discussed.
研究领域:
材料科学
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环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF ADHESION SCIENCE AND TECHNOLOGY
·
2021
·
IF 2.077
Ling Zhang,Xinyang Jin,Yuedan Xu,Chaoyang Wang,Mingxing Li,Baiping Fu
This study investigated effects of polyacrylic acid (PAA) on nanolayering self-assembly, and effects of salt ions on the formation of nanolayering after their chemical interaction with 10-methacryloyloxydecyl dihydrogen phosphate (MDP). ACP–MDP suspension was prepared by dispersing 0.01 g ACP nanoparticles in 4 mL of a 5 wt% MDP solution. Then a PAA solution (100 or 500 μg/mL) was mixed into ACP–MDP suspension. The reaction products were analyzed by transmission electron microscope (TEM). After one of the following metal chlorides (each 0.076 mM of CaCl2, BaCl2, AlCl3, FeCl2, FeCl3, MnCl2, CuCl2, ZnCl2, or MgCl2) was dispersed in a 4 mL MDP solution, they were further analyzed by X-ray diffraction (XRD) and TEM. ACP nanoparticles in the MDP solution could self-assemble into ACP–MDP nanolayering composites. The TEM images show that an amount of ACP nanoparticles were aggregated and fused together after the addition of PAA into ACP–MDP suspensions, while no nanolayering was found. The XRD data and TEM images reveal that nanolayering was self-assembled after the chemical interaction of MDP with some metal chlorides (CaCl2, BaCl2, AlCl3, FeCl2, FeCl3, MnCl2), but not with the others (ZnCl2, CuCl2, MgCl2). PAA could inhibit the self-assembly of nanolayering. Some salt ions play an important role in highly ordered, self-assembled nanostructure after their chemical interaction with MDP. The finding is helpful for functional materials fabrication.
研究领域:
材料科学
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生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
Micromachines
·
2023
·Vol. 14
·期 3
·660
·
IF 3.4
Youqiang Xing,Yun Wang,Lei Liu,Ze Wu
As a major public health issue, early cancer detection is of great significance. A field-effect transistor (FET) based on an MoS2/C60composite nanolayer as the channel material enhances device performance by adding a light source, allowing the ultrasensitive detection of cancer-related miRNA. In this work, atomic layer deposition (ALD) was used to deposit MoS2layer by layer, and C60was deposited by an evaporation coater to obtain a composite nanolayer with good surface morphology as the channel material of the FET. Based on the good absorption of C60by blue-violet light, a 405 nm laser was selected to irradiate the channel material, improving the function of FET biosensors. A linear detection window from 10 pM to 1 fM with an ultralow detection limit of 5.16 aM for miRNA-155 was achieved.Keywords:ultrasensitive detection;FET;MoS2/C60composite nanolayer
研究领域:
生物医学工程
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nature Communications
·
2023
·Vol. 14
·期 1
·1-9
·
IF 16.6
Wang Enze,Xiong Zixin,Chen Zekun,Xin Zeqin,Ma Huachun,Ren Hongtao,Wang Bolun,Guo Jing,Sun Yufei,Wang Xuewen,Li Chenyu,Li Xiaoyan,Liu Kai
Solitary waves are unique in nonlinear systems, but their formation and propagation in the nonlinear fluid-structure interactions have yet to be further explored. As a typical nonlinear system, the buckling of solid thin films is fundamentally related to the film-substrate interface that is further vulnerable to environments, especially when fluids exist. In this work, we report an anomalous, solitary-wave-like blister (SWLB) mode of MoS 2 thin films in a humid environment. Unlike the most common telephone-cord and web buckling deformation, the SWLB propagates forward like solitary waves that usually appear in fluids and exhibits three-dimensional expansions of the profiles during propagation. In situ mechanical, optical, and topology measurements verify the existence of an interfacial water nanolayer, which facilitates a delamination of films at the front side of the SWLB and a readhesion at the tail side owing to the water nanolayer-induced fluid-structure interaction. Furthermore, the expansion morphologies and process of the SWLB are predicted by our theoretical model based on the energy change of buckle propagation. Our work not only demonstrates the emerging SWLB mode in a solid material but also sheds light on the significance of interfacial water nanolayers to structural deformation and functional applications of thin films.
研究领域:
材料科学
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非线性动力学
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界面科学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF NUCLEAR MATERIALS
·
2024
·
IF 2.8
Jiaqi Li,N. Daghbouj,Xiaoxun He,Ke Chen,Xingzhong Cao,Shuoxue Jin,Jun Li,Haiyuan Wei,Junjun Zhou,Tongmin Zhang,Shuai Xu,Fangfang Ge,J. Duchoň,A.T. AlMotasem,T. Polcar,Bingsheng Li
Layered carbides and borides, blending ceramic and metallic characteristics, present compelling prospects for future nuclear reactor applications due to their complex nanolaminate crystal structure. To explore the behavior of Fe 2 AlB 2 under different conditions, helium irradiation is conducted across saturation fluences and under different annealing and irradiation temperatures. Room temperature (RT) irradiation causes some changes: a-lattice expands 0.3 %, c-lattice contracts 0.07 %, and an embedded amorphous layer into the matrix is formed. 400 °C annealing keeps an amorphous structure whereas 800 °C annealing fully recrystallizes with bubble growth. Increasing the irradiation temperature to 400 °C with the same fluence, smaller bubbles form without an amorphous layer, indicating defect recombination depends on helium attachment to vacancies. Under irradiation at 700 °C, faceted bubbles develop exclusively within Fe 2 AlB 2 , with no such bubbles in Al 2 O 3 . These faceted bubbles align themselves along (110) planes. Simultaneously, irradiation prompts tangled dislocations within the damaged layer, fostering the congregation of polygonal bubbles along grain boundaries (GBs) and creating denuded areas at GBs. Fe 2 AlB 2 demonstrates remarkable oxidation resistance under high-temperature irradiation, maintaining surface stability without the cracks seen in ion-irradiated Ti 3 SiC 2 and Ti 2 AlC at RT. Fe 2 AlB 2 shows promise for use in reactors operating at temperatures above 500 °C due to its resilience to irradiation. Further investigation is warranted for its application in reactors operating in environments exceeding this threshold temperature.
研究领域:
材料科学
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核能工程
✓ 已验证
产品关联
DOI
高影响因子
CRYSTENGCOMM
·
2021
·Vol. 23
·期 33
·5663-5667
·
IF 3.545
Xiaoshuang Chen,Meina Ju,Kun Song,Guoli Chen,Rui Yang,Jinping Wang
Hydrogen generation via water electroreduction is pivotal for exploiting clean-energy skills. Nevertheless, developing a low price and high-performance catalytic activity substance to take the place of expensive precious metal currently in use is still a precedent condition for technology commercialization. In this study, large-scale hierarchical few-layer MoSe2 nanosheets were successfully grown on the surface of sodium sulfide crystals. The water solubility of sodium sulfide makes it advantageous to generate MoSe2 nanolayers via a simple and inexpensive means. The micron-level sodium sulfide crystal surface has a very critical function in the nucleus formation and development of few-layer MoSe2. The ultrathin hierarchical MoSe2 nanolayers obtained using the proposed approach have preferable hydrogen evolution reaction. Furthermore, it is a fascinating technique that the template can be reused without environmental pollution. This research can be used to manufacture other ultrathin hierarchical transition-metal dichalcogenide nanolayers for high-performance many-sided applications.
研究领域:
材料科学
·
电化学
·
能源催化
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纳米技术
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Qing Yang,Yong Ma,Jun Wang,Shuai Tan,Caihong Wang,Yong Wu
Ordered architectures favorable for energy storage are hard to build and preserve on stretchable electrodes owing to the elongation-induced variation in morphology. Herein, we demonstrate the construction of nanolayered polypyrrole (PPy) on stretchable polymeric electrodes via lyotropic liquid crystal (LLC) template for the first time. In situ graft polymerization of PPy onto swollen polyacrylamide- co -poly(2-hydroxy ethyl acrylate) in an aqueous L α LLC gives stretchable electrodes with nanolayered PPy rooted in expandable wrinkles. The nanolayered PPy electrode could be stretched up to 330 % strain and keep intact after 2,000 stretch-release cycles owing to reversible unfolding of wrinkles. By virtue of the well-arranged PPy nanolayers, the stretchable electrode exhibits a high electrical conductivity of 154 S cm −1 and gives a capacitance of 1143 mF cm −2 after assembled into a supercapacitor with H 2 SO 4 polyacrylamide hydrogel. In addition, the capacitance retention remains 94.6 % after 2,000 stretch-release cycles accompanied by galvanostatic charge–discharge. The LLC templating graft polymerization of conjugated polymers on elastic substrates paves a way to develop nanostructured stretchable electrodes for high-performance wearable supercapacitors.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Jia Song,Wenting Li,Kun Song,Chuanli Qin,Xiaoshuang Chen
A common approach to research supercapacitors is to choose a special structure of nanomaterials combined with noble metal oxides to increase capacity. However, using precious metals as electrodes with special nanostructures is both expensive from a commercial point of view and detrimental to the commercialization of supercapacitors. Therefore, we report a system of electrochemical polymerization to prepare a porous polymer nanolayer coated nanomaterial Co(CO 3 ) 0.5 (OH) (CoCHH)/PEDOT electrode with interwoven porous network structure. The PEDOT nanolayer has the advantages of controllable thickness, good electrical conductivity, porous and continuous. In addition, each unit of the special structure can be uniformly coated by nanolayer, and prevent the internal nanostructure from collapsing of the structure as electrolyte ions move in and out, and the conductivity and porosity of the composite electrode can be improved. As a result, the positive electrode of the composite nanolayer system showed excellent stability, with capacitance retention of 92.7% after 2000 cycles.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Advanced Science
·
2017
·Vol. 4
·期 9
·1700031
·
IF 9.034
Junjie Ma,Guang Yang,Minchao Qin,Xiaolu Zheng,Hongwei Lei,Cong Chen,Zhiliang Chen,Yaxiong Guo,Hongwei Han,Xingzhong Zhao,Guojia Fang
Reducing the energy loss and retarding the carrier recombination at the interface are crucial to improve the performance of the perovskite solar cell (PSCs). However, little is known about the recombination mechanism at the interface of anode and SnO 2 electron transfer layer (ETL). In this work, an ultrathin wide bandgap dielectric MgO nanolayer is incorporated between SnO 2 :F (FTO) electrode and SnO 2 ETL of planar PSCs, realizing enhanced electron transporting and hole blocking properties. With the use of this electrode modifier, a power conversion efficiency of 18.23% is demonstrated, an 11% increment compared with that without MgO modifier. These improvements are attributed to the better properties of MgO-modified FTO/SnO 2 as compared to FTO/SnO 2 , such as smoother surface, less FTO surface defects due to MgO passivation, and suppressed electron–hole recombinations. Also, MgO nanolayer with lower valance band minimum level played a better role in hole blocking. When FTO is replaced with Sn-doped In 2 O 3 (ITO), a higher power conversion efficiency of 18.82% is demonstrated. As a result, the device with the MgO hole-blocking layer exhibits a remarkable improvement of all J–V parameters. This work presents a new direction to improve the performance of the PSCs based on SnO 2 ETL by transparent conductive electrode surface modification.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2017
·
IF 0
Quan Wang,Tuo Li,Pengfei Xie,Jiahai Ma
In this study, the interface effects of Cu 2 O and Au/Cu 2 O semiconductors were improved by addition of a magnesia (MgO) interface nanolayer (MIN) deposited via precipitation. The morphologies, crystal structures, chemical compositions, elemental states and optical properties of MgO/Cu 2 O and Au/MgO/Cu 2 O heterojunctions were characterized via SEM, XRD, XPS, UV–VIS–NIR and PL. It was found that the MIN has a surface passivation effect that inhibits the aggregation and oxidation of Cu 2 O. This enhances Cu 2 O semiconductors’ wettability and stability, improves crystallinity and reduces Au particle sizes. More importantly, the MIN promotes charge transfer via tunneling through the insulator, and enhances adsorption of molecular oxygen, facilitating superoxide radicals formation during photoreactivity. MgO/Cu 2 O and Au/MgO/Cu 2 O exhibited superior photodegradation of methyl orange, attributed to the boost of O 2 − and h + . This work confirmed the importance of MIN as a useful modification of semiconductor photocatalysts, and the MIN can significantly enhance the production of superoxide radicals in the photocatalytic activity with visible light.
研究领域:
材料科学
·
环境科学
·
化学
✓ 已验证
产品关联
DOI
危险品化学品经营许可证（带存储）