Advanced Optical Materials
·
2020
·Vol. 8
·期 12
·1902118
·
IF 8.286
Fan Fang,Mengjia Liu,Wei Chen,Hongcheng Yang,Yizun Liu,Xiang Li,Junjie Hao,Bing Xu,Dan Wu,Kun Cao,Wei Lei,Peter Müller-Buschbaum,Xiao Wei Sun,Rong Chen,Kai Wang
Quantum dots (QDs) are promising for being used in advanced displays due to their outstanding emission properties. Herein, a novel encapsulation method for QDs is reported and ultra-stable QDs@SiO 2 @Al 2 O 3 luminescent microspheres (QLuMiS) are obtained by combining a sol–gel method for the intermediate SiO 2 layer with a fluidized powder atomic layer deposition (ALD) for the outer Al 2 O 3 layer. The rich hydroxyl coverage on the QDs@SiO 2 surface provides abundant chemisorption sites, which are beneficial for the deposition of Al 2 O 3 in the ALD process. Simultaneously, the water-oxygen channels in the SiO 2 layer are blocked by the Al 2 O 3 layer, which protects the QDs against deterioration. Consequently, the QLuMiS exhibit an excellent stability with 86% of the initial light conversion efficiency after 1000 h of blue light aging under a light power density of 2000 mW cm −2 . Such stability is significantly better than that of QDs@Al 2 O 3 and QDs@SiO 2 samples. Moreover, under this strong irradiation aging condition with blue light, the extrapolated lifetime (L50) of QLuMiS is 4969 h, which is ten times longer than that of QDs@SiO 2 and is the best record as far as is known. Finally, a prototype of a QLuMiS-based cellphone screen with a wide color gamut of 115% NTSC is demonstrated.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
Materials
·
2021
·Vol. 14
·期 18
·5380
·
IF 3.623
Haichang Zhang,Zhibin Xu,Bin Shi,Fei Ding,Xingjiang Liu,Hongzhao Wu,Chunsheng Shi,Naiqin Zhao
Cr8O21can be used as the cathode material in all-solid-state batteries with high energy density due to its high reversible specific capacity and high potential plateau. However, the strong oxidation of Cr8O21leads to poor compatibility with polymer-based solid electrolytes. Herein, to improve the cycle performance of the battery, Al2O3atomic layer deposition (ALD) coating is applied on Cr8O21cathodes to modify the interface between the electrode and the electrolyte. X-ray photoelectron spectroscopy, scanning electron microscope, transmission electron microscope, and Fourier transform infrared spectroscopy, etc., are used to estimate the morphology of the ALD coating and the interface reaction mechanism. The electrochemical properties of the Cr8O21cathodes are investigated. The results show that the uniform and dense Al2O3layer not only prevents the polyethylene oxide from oxidization but also enhances the lithium-ion transport. The 12-ALD-cycle-coated electrode with approximately 4 nm Al2O3layer displays the optimal cycling performance, which delivers a high capacity of 260 mAh g−1for the 125th cycle at 0.1C with a discharge-specific energy of 630 Wh kg−1.Keywords:Cr8O21cathode material;atomic layer deposition;all-solid-state lithium-ion batteries;Al2O3coating
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Yu Zhang,Yuxin Luo,Ya Huang,Mengqi Wang,Annan He,Jiaxing Chen,Xuelin Lu,Zhiyu Huang,Wei Ke,Hao Yu,Fengxiang Chen
Carbon fiber (CF) has been widely used in aerospace, military, infrastructure, sports, and leisure fields owing to its excellent mechanical properties, superior corrosion and friction resistances, excellent thermal stability, and lightweight. However, the ultrablack appearance derived from the extremely strong absorption of light throughout the entire visible region makes it difficult to satisfy the aesthetic and pleasurable demands of the colorful world and limits their applications in a broader field. Herein, inspired by the Japanese jewel beetle, a double-layer ultrathin Al2O3/TiO2 composite structure was fabricated on CFs by the atomic layer deposition method. CFs exhibited desired color diversity by controlling the thickness of Al2O3 and TiO2 films without changing the total thickness of the composite film’s structure. Meanwhile, colored CFs have no color change/destruction after a series of environmental durability measurements and exhibited remarkable superdurability and excellent flame retardancy. Our work provides insights for innovative, high-performance, and multifunctional CF that can help achieve high quality and sustainable development of the CF industry.
研究领域:
材料科学
·
环境科学
·
光学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Wenlu Zhang,Mengzhe Bao,Mengyao Chen,Wenbin Li,Chong He,Weilin Xu
High-performance TiO 2 nanotube materials are highly demanded across various fields spanning thermal insulation, catalyst supports, filtration, and so on. However, the practical applications of hollow nanotubes are constrained by the low efficiency and uncontrollable structural properties. Herein, mass production of flexible and high catalytic hollow Al/Si@TiO 2 nanotubes were realized. Through solution blow spinning and atomic layer deposition processes, TiO 2 coated Al/Si@PAN core–shell nanofiber intermediate product was obtained with high efficiency. Hollow tubular structure of Al/Si@TiO 2 nanotubes with wall thicknesses among 150–350 nm was successfully replicated by sacrificing PAN core fibers template through a high-temperature pyrolysis process. Organic polysiloxane and polyalumina were employed as the internal supports to enhance the toughness and elasticity of the hollow Al/Si@TiO 2 nanotube products. Diameters of hollow Al/Si@TiO 2 nanotubes can be controlled ranging from 0.5-2.5 μm through adjusting the flow rate among 10–30 mL/h and air pressure among 0.2–0.4 MPa. Pyrolyzed hollow Al/Si@TiO 2 nanotubes exhibited remarkable elasticity with the compression strain of over 60 %. Hollow Al/Si@TiO 2 nanotubes demonstrated a methylene blue degradation efficiency of reached 61 % and outstanding reusability over multiple cycles, which held promising potential for utilization in high efficiency purification and remediation of water pollutants.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Nanophotonics
·
2020
·Vol. 9
·期 7
·1981-1991
·
IF 7.491
Zhiwen Li,Jing Wu,Cong Wang,Han Zhang,Wenjie Yu,Youming Lu,Xinke Liu
MoS 2 , as a typical representative of two-dimensional semiconductors, has been explored extensively in applications of optoelectronic devices because of its adjustable bandgap. However, to date, the performance of the fabricated photodetectors has been very sensitive to the surrounding environment owing to the large surface-to-volume ratio. In this work, we report on large-scale, high-performance monolayer MoS 2 photodetectors covered with a 3-nm Al 2 O 3 layer grown by atomic layer deposition. In comparison with the device without the Al 2 O 3 stress liner, both the photocurrent and responsivity are improved by over 10 times under 460-nm light illumination, which is due to the tensile strain induced by the Al 2 O 3 layer. Further characterization demonstrated state-of-the-art performance of the device with a responsivity of 16.103 A W −1 , gain of 191.80, NEP of 7.96 × 10 −15 W Hz −1/2 , and detectivity of 2.73 × 10 10 Jones. Meanwhile, the response rise time of the photodetector also reduced greatly because of the increased electron mobility and reduced surface defects due to the Al 2 O 3 stress liner. Our results demonstrate the potential application of large-scale strained monolayer MoS 2 photodetectors in next-generation imaging systems.
研究领域:
材料科学
·
光电子学
·
纳米技术
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Tonghe Xing,Annan He,Zhiming Du,Yu Zhang,Yuxin Luo,Zhiyu Huang,Mengqi Wang,Zhicheng Shi,Aixin Tong,Sijie Qiao,Xiaohong Liao,Jie Bai,Heng Pan,Zihui Liang,Wei Ke,Hao Yu,Fengxiang Chen
Silk fiber, as a luxurious textile raw material, is widely used in the textile industry due to its excellent mechanical properties and wearing comfort. However, the poor (ultraviolet, UV) light stability of silk affects its further application in high-end textiles, fashionable apparel, and smart materials. Although surface modification can endow the excellent UV resistance of silk fibers, it often reduces its comfort property. Herein, a laminated ultrathin Al2O3/TiO2 coating with a total thickness of 120 nm is fabricated on the surface of silk fiber via a modified atomic layer deposition (ALD) technique. The tenacity of ALD-coated silk can maintain 61.1% of its original value after exposure to intense UV light (640 mW/cm2) under high temperature (>200 °C) for 6 h, which is far superior to other work that has been reported. This can be attributed to the synergistic effect of the reflection of UV light by the multilayer film barrier, the strong oxidizing free radicals by the Al2O3 layer in the innermost layer, and thermal shield of laminated ultrathin Al2O3/TiO2 film. ALD-coated silk fabrics can also demonstrate a multicycle laundering durability, thermal and chemical stabilities, and flame retardancy. More importantly, the wearing comfort of the modified silk has no obvious change. This method provides principle and technical guidance in high-performance and multifunctional fibers and devices.
研究领域:
材料科学
·
纺织工程
·
表面改性技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Advanced Science
·
2021
·Vol. 8
·期 12
·2004171
·
IF 16.806
Fengxiang Chen,Lisha Zhai,Huiyu Yang,Shichao Zhao,Zonglei Wang,Chong Gao,Jingyi Zhou,Xin Liu,Zhenwei Yu,Yong Qin,Weilin Xu
Aramid fibers are widely used in many cutting-edge fields, including space, aviation, military, and electronics. However, their poor UV resistance and surface inertness seriously hinder their utilization, especially in harsh environments. Here, a dual-layer ultrathin Al 2 O 3 –TiO 2 coating with a thickness of 70–180 nm is fabricated on aramid fibers by a modified atomic layer deposition (ALD) method. The tenacity of ALD-coated aramid fibers decreases only by ≈0.85% after exposure to intense UV light (4260 W m −2 ) under high temperature (>200 ℃) for 90 min, which equals to continuous exposure to sunlight for about 17 500 days. The as-prepared aramid fibers also show excellent laundering durability, thermal and chemical stabilities. This work presents a green and damage-free approach to achieve the highly anti-UV aramid fibers without sacrificing their outstanding performance, which is expected to guide material design for future innovations in functional fibers and devices.
研究领域:
材料科学
·
表面工程
·
航空航天
·
军事应用
✓ 已验证
DOI
高影响因子
Precision Chemistry
·
2024
·
IF 0
Hui Ye,Lina Cao,Minghui Gu,Han Nie,Qingqing Gu,Bing Yang,Yunxing Bai,Qinxue Nie,Weixin Huang,Junling Lu
Propane dehydrogenation (PDH), an atom-economic reaction to produce high-value-added propylene and hydrogen with high efficiency, has recently attracted extensive attention. The severe deactivation of Pt-based catalysts through sintering and coking remains a major challenge in this high-temperature reaction. The introduction of Sn as a promoter has been widely applied to improve the stability and selectivity of the catalysts. However, the selectivity and stability of PtSn catalysts have been found to vary considerably with synthesis methods, and the role of Sn is still far from fully understanding. To gain in-depth insights into this issue, we synthesized a series of PtSn/SiO2 and SnPt/SiO2 catalysts by varying the deposition sequence and Pt:Sn ratios using atomic layer deposition with precise control. We found that PtSn/SiO2 catalysts fabricated by the deposition of SnOx first and then Pt, exhibited much better propylene selectivity and stability than the SnPt/SiO2 catalysts synthesized the other way around. We demonstrate that the presence of Sn species at the Pt-SiO2 interface is of essential importance for not only the stabilization of PtSn clusters against sintering under reaction conditions but also the promotion of charge transfers to Pt for high selectivity. Besides the above, the precise regulation of the Sn content is also pivotal for high performance, and the excess amount of Sn might generate additional acidic sites, which could decrease the propylene selectivity and lead to heavy coke formation. These findings provide deep insight into the design of highly selective and stable PDH catalysts.
研究领域:
化学工程
·
催化化学
·
材料科学
✓ 已验证
DOI
JOURNAL OF MATERIALS CHEMISTRY
·
2012
·Vol. 22
·期 21
·10665-10671
·
IF 5.968
Anmin Nie,Jiabin Liu,Qianqian Li,Yingchun Cheng,Cezhou Dong,Wu Zhou,Peng Wang,Qingxiao Wang,Yang Yang,Yihan Zhu,Yuewu Zeng,Hongtao Wang
Taking TiO2/SnO2 core–shell nanowires (NWs) as a model system, we systematically investigate the structure and the morphological evolution of this heterostructure synthesized by atomic layer deposition/epitaxy (ALD/ALE). All characterizations, by X-ray diffraction, high-resolution transmission electron microscopy, selected area electron diffraction and Raman spectra, reveal that single crystalline rutile TiO2 shells can be epitaxially grown on SnO2 NWs with an atomically sharp interface at low temperature (250 °C). The growth behavior of the TiO2 shells highly depends on the surface orientations and the geometrical shape of the core SnO2 NW cross-section. Atomically smooth surfaces are found for growth on the {110} surface. Rough surfaces develop on {100} surfaces due to (100) − (1 × 3) reconstruction, by introducing steps in the [010] direction as a continuation of {110} facets. Lattice mismatch induces superlattice structures in the TiO2 shell and misfit dislocations along the interface. Conformal epitaxial growth has been observed for SnO2 NW cores with an octagonal cross-section ({100} and {110} surfaces). However, for a rectangular core ({10} and {010} surfaces), the shell also derives an octagonal shape from the epitaxial growth, which was explained by a proposed model based on ALD kinetics. The surface steps and defects induced by the lattice mismatch likely lead to improved photoluminescence (PL) performance for the yellow emission. Compared to the pure SnO2 NWs, the PL spectrum of the core–shell nanostructures exhibits a stronger emission peak, which suggests potential applications in optoelectronics.
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Huiyu Yang,Zhenwei Yu,Ke Li,Lang Jiang,Xin Liu,Bo Deng,Fengxiang Chen,Weilin Xu
As the most favored high-quality biopolymer, silk fiber is widely used in the textile and medical industries owing to its impressive mechanical properties, wear comfort properties, and biocompatibility. However, its photoinstability, chemical instability, and thermal instability seriously hinder its utilization in luxurious fashionable apparels. Therefore, we herein report the preparation of an ultrathin and uniform TiO2–Al2O3 cloth with a thickness of just six in a thousand of fiber on silkworm silk fiber via atomic layer deposition. In this ultrathin composite cloth, the outer TiO2 layer acts as a sacrificial ultraviolet (UV) absorbent to dissipate large amounts of UV energy. Free radicals and electrons generated by the TiO2 layer are effectively blocked outside the surface of the bulk silk fiber by the inner insulating Al2O3 layer. The excellent UV-resistance of the modified silk fiber was confirmed by a lack of fade in the silk fabric after exposure to UV light for 60 min (equal to continuous exposure to strong sunlight for 3285 days). Compared with silk fiber, the tenacity of the prepared SF-200Al2O3–800TiO2 increased by 18.9% even after sunlight exposure. In addition, both the chemical and thermal stabilities of the modified silk fiber were improved. This technology is expected to have potential applications in various fields, such as high-end fabric development and smart materials, and will further guide material design for future innovations in functional fibers and devices.
研究领域:
材料科学
·
纺织工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CELLULOSE
·
2017
·Vol. 24
·期 9
·3981-3990
·
IF 3.417
Li Linfeng,Xu Weilin,Wu Xi,Liu Xin,Li Wenbin
To produce cotton fabrics with infrared-insulating properties, TiO 2 nanoparticles are uniformly and firmly coated onto the fabric using low-temperature atomic layer deposition (ALD) technology at 90 °C. Cotton fabric samples were tested and the experimental data indicated that the fabrics treated by the ALD process had excellent infrared resistance and reflection properties, with the infrared and thermal insulation rates of 67.6 and 28.5% increasing to 86.7 and 63.9%, respectively, after 2000 ALD cycles. The thickness of the fabric increased with the number of ALD cycles, as determined using a fabric thickness gauge. The fabric surface morphology and fibre cross-sections were examined using a scanning electron microscope and transmission electron microscope, respectively. Energy-dispersive X-ray spectroscopy was used to confirm that TiO 2 was the main component of the coating on the surface of cotton fabric. Beyond that, an infrared camera was used to detect the temperature of the upper and lower surfaces of the fabric and a thermal gravimetric analyser was used to show how the TiO 2 particles were deposited on the cotton fabric.
研究领域:
材料科学
·
纺织工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2018
·
IF 3.779
Xiwei Zhang,Dan Meng,Zhenjie Tang,Dan Hu,Huijuan Geng,Huiyuan Zheng,Shuaipu Zang,Zhongrui Yu,Panpan Peng
Radial 1-D nano-heterojunctions have distinct optoelectronic properties. However, their complex fabrication process is still the bottleneck of device applications. Herein, a facile atomic layer deposition (ALD) method was used to coat a polycrystalline CdS thin film with high uniformity and controllable thickness on the surface of the as-synthesized p-type ZnSe nanowires, for fabricating radial 1-D ZnSe-CdS nano-heterojunctions. The nano-heterojunctions exhibited excellent optoelectronic properties. Under blue/violet light, the nano-heterojunctions obtained a response radio of ∼5 × 10 3 , a responsitivity of ∼1.43 A/W, a gain of ∼3.78 and a detectivity of ∼0.57 × 10 12 cmHz 1/2 W −1 at zero bias. Furthermore, the nano-heterojunction also showed obvious photovoltaic characteristic with a power conversion efficiency of ∼0.96%. This method is expected to play an important role in nano-heterojunction construction and their device applications.
研究领域:
材料科学
·
纳米技术
·
光电子学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）