ADVANCED MATERIALS
·
2018
·Vol. 30
·期 30
·1801347
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IF 21.95
Chao Jia,Chaoji Chen,Yudi Kuang,Kun Fu,Yilin Wang,Yonggang Yao,Spencer Kronthal,Emily Hitz,Jianwei Song,Fujun Xu,Boyang Liu,Liangbing Hu
Advanced textiles made of macroscopic fibers are usually prepared from synthetic fibers, which have changed lives over the past century. The shortage of petrochemical resources, however, greatly limits the development of the textile industry. Here, a facile top-down approach for fabricating macroscopic wood fibers for textile applications (wood-textile fibers) comprising aligned cellulose nanofibers directly from natural wood via delignification and subsequent twisting is demonstrated. Inherently aligned cellulose nanofibers are well retained, while the microchannels in the delignified wood are squeezed and totally removed by twisting, resulting in a dense structure with approximately two times higher mechanical strength (106.5 vs 54.9 MPa) and ≈20 times higher toughness (7.70 vs 0.36 MJ m −3 ) than natural wood. Dramatically different from natural wood, which is brittle in nature, the resultant wood-textile fibers are highly flexible and bendable, likely due to the twisted structures. The wood-textile fibers also exhibit excellent knitting properties and dyeability, which are critical for textile applications. Furthermore, functional wood-textile fibers can be achieved by preinfiltrating functional materials in the delignified wood film before twisting. This top-down approach of fabricating aligned macrofibers is simple, scalable, and cost-effective, representing a promising direction for the development of smart textiles and wearable electronics.
研究领域:
材料科学
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纺织工程
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生物质材料
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DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2021
·
IF 4.527
Dongbo Zhang,Yue Yu,Xiaolong Feng,Zhongyuan Tian,Ruiqing Song
A pyrochlore-structured La 2 (Zr 0.2 Ce 0.2 Hf 0.2 Sn 0.2 Ti 0.2 ) 2 O 7 high-entropy oxide was designed and synthesized, and its properties were tested. Traditional two-layer structured thermal barrier coatings (TBCs) with a La 2 (Zr 0.2 Ce 0.2 Hf 0.2 Sn 0.2 Ti 0.2 ) 2 O 7 top-coat were prepared by plasma spraying . A phase-pure defective-fluorite high-entropy-oxide top coat was thus obtained. The results confirmed the possibility of synthesizing pyrochlore-structured La 2 (Zr 0.2 Ce 0.2 Hf 0.2 Sn 0.2 Ti 0.2 ) 2 O 7 . The material exhibited a low thermal conductivity , which increased with increasing temperature. The coefficient of thermal expansion (CTE) of La 2 (Zr 0.2 Ce 0.2 Sn 0.2 Hf 0.2 Ti 0.2 ) 2 O 7 ranged from 7.55 × 10 −6 °C −1 to 8.63 × 10 −6 °C −1 for the corresponding range of room temperature to 1000 °C. After 10 thermal cycles at 1050 °C, the La 2 (Zr 0.2 Ce 0.2 Hf 0.2 Sn 0.2 Ti 0.2 ) 2 O 7 top coat spalled in the TBC. Spallation did not occur at the interface between the bond coat and the thermally grown oxide layer, while it is in the top coat near the bond coat. Owing to the low fracture toughness and low CTE, the thermal cycling lifetime of TBCs with the La 2 (Zr 0.2 Ce 0.2 Hf 0.2 Sn 0.2 Ti 0.2 ) 2 O 7 top coat was short.
研究领域:
材料科学
·
陶瓷
·
热障涂层
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高熵氧化物
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DOI
高影响因子
Advanced Optical Materials
·
2025
·Vol. 13
·期 36
·e01530
·
IF 7.2
Jia-Yan Zhang,Jing Xiao,Hong-Yu Liu,Zhao-Yang Yin,Hao-Wen Huang,Xu Gao,Ya-Nan Zhong,Jian-Long Xu,Sui-Dong Wang
Minimizing reverse-bias dark current density ( J d ) while retaining high photoresponse is vital for top-illuminated perovskite photodiodes. It remains challenging to thoroughly clarify the inherent origin of J d . In this work, the buried interface is demonstrated to play a critical role in J d for top-illuminated perovskite photodiodes. Introducing an Al 2 O 3 thin layer at the NiO x /perovskite interface turns out to be a simple and effective approach to suppressing J d . Such interfacial modification has dual positive effects. One is to facilitate the favorable morphology of perovskites with compact grain boundaries, thus impeding the leakage current through shunt resistance. The other is to reduce the interfacial trap states, thereby decreasing the trap-assisted tunneling current. The resulted top-illuminated perovskite photodiodes exhibit outstanding photodetection performances, including an ultralow J d of 8 × 10 −10 A cm −2 at −0.1 V, a remarkable specific detectivity of 1.5 × 10 12 Jones, and a fast response time of only 410 ns. Leveraging these device merits, the perovskite photodiodes are monolithically integrated onto a thin-film transistor array to obtain the 64 × 64 top-illuminated imager. The perovskite imager is utilized to implement an intelligent vision system with the ability of basic visual perception, which highlights the tremendous potential of the top-illuminated perovskite photodiodes in versatile imaging applications.
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高影响因子
ACS Nano
·
2025
·
IF 16
Hengyu Cao,Lutao Li,Qiankun Li,Weiyu Cheng,Chen Wang,Ruonan Wang,Xiangle Sun,Fengcheng Zhang,Xiawei Zhang,Ming Huang,Lu You,Guifu Zou
Single crystal high-resolution array patterning of halide perovskite films is a crucial step toward unlocking their full potential for various optoelectronic applications. The top-down manufacturing strategies are hindered by the intrinsic fragility and thermal instability of halide perovskites. Herein, we establish an integrated growth-patterning strategy using a polymer with polar functional groups, leveraging the polymer’s steric hindrance effect during crystal growth, thus reducing nucleation density and suppressing crystal growth rate, and simultaneously, improving its mechanical strength and thermal stability by a coordinative polymer protective layer with the film surface. Moreover, the polar functional groups effectively suppress surface defects and enhance the crystalline quality through coordinative interaction. This integrated method can also be used to realize centimeter-sized (∼200 mm2) and high aspect ratio (104) single crystal films growth and patterning in a variety of halide perovskites. The integrated growth-patterning strategy facilitates the commercialization of halide perovskites.
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PubMed
高影响因子
ACS Sensors
·
2019
·
IF 6.944
Jin Zhou,Zhen Ma,Xiao Hong,Hui-Min Wu,Shu-Yan Ma,Yang Li,Da-Jing Chen,Hai-Yin Yu,Xiao-Jun Huang
Fabrication of an outer membrane is crucial for an implantable biosensor to enhance the long-term stability and accuracy of sensors. Herein, an adaptable, controllable, porous outer membrane for an implantable biosensor was fabricated using a “top-down” method, allowing maximum retention of enzyme activity and fine control over membrane microstructure. Polysulfone hollow fibrous membranes with different pore sizes and porosities were used as a base membrane. Chitosan (CH) and sodium alginate (SA) were self-assembled on the inner surface of PSfHM to construct a biocompatible and conductive interface between PSfHM and the electrode. In vitro and in vivo experiments were used to evaluate the performance of implantable glucose biosensors with PSfHM and CH/SA modified PSfHM (PSfHM-CH/SA). The glucose biosensor with PSfHM-CH/SA exhibited a more stable output current than bare sensors and a quick response time (<50 s). The glucose biosensor with PSfHM-CH/SA linear sensing range was between 0 and 22 mM (R2 = 0.9905), and relative sensitivity remained at >87% within 7 days and >76% within 15 days. Furthermore, response currents recorded by implanted sensors closely followed the blood glucose trend from the tail vein blood during in vivo experiments.
研究领域:
生物医学工程
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材料科学
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分析化学
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DOI
PubMed
高影响因子
ACS Photonics
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2022
·
IF 7.077
Hongwei Yu,Hao Zhu,Mengxin Xu,Jiaming Zhang,Haiwei Feng,Letian Zhang,Shihao Liu,Wenfa Xie
Flexible displays are essential to provide information in real time for human–machine interactions. As a next-generation display technology, quantum-dot light-emitting diodes (QLEDs) are potentially serving as key components for flexible displays. However, it is still challenging for QLEDs to simultaneously achieve flexibility, large-scale production, and high efficiencies. To this end, a strategy is proposed here by combining a top-emitting structure, optical microcavity optimization, and large-scale film preparation. A top-emitting microcavity with semitransparent and reflective metals is designed to achieve flexibility, efficient carrier injection, and high light extraction efficiency. Precision manufacturing of large-area QLEDs with the designed top-emitting microcavity is achieved by combining surfactant-assisted blade-coating and vacuum thermal evaporation processes. With this strategy, a large-area flexible QLED with an active area of 400 mm2 and a maximum external quantum efficiency of 21.8% is developed. This strategy provides a promising approach toward the development of flexible displays with the demonstration of a 1.3 in. passive-matrix flexible QLED display of 19 by 19 pixels.
研究领域:
材料科学
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显示技术
·
光学工程
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DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2026
·
IF 7.3
Huifeng Liu,Jing He,Zhihai Wu,Jian Wang,Yunyun Zhang,Mingxia Sun,Juanjuan Wang,Hongdeng Qiu,Xuwei Chen,Jia Chen
Compared with bulk crystal materials that have limitations such as high mass transfer resistance and insufficient exposure of surface action sites, the development of ultrathin two dimensional nanosheets is more attractive. Developing chiral stationary phases with both structural stability and high enantioselectivity remains a key challenge in this field. This study reported a chiral ionic organic single-crystal (BPDS-PBIM), which was constructed by the ionic self-assembly of 4,4′-biphenyldisulfonic acid (BPDS) and chiral ionic liquid (PBIM). Its distinct supramolecular environment with multiple chiral centers and unique molecular packing pattern was confirmed by single-crystal X-ray diffraction (SC-XRD, space group P21). Experiments showed that the stationary phase of 2D nanosheets, prepared by exfoliating BPDS-PBIM, exhibited exceptional separation performance for complex pharmaceutical molecules (e.g., ibuprofen, ketoprofen, flurbiprofen, fenoprofen, mexiletine hydrochloride) and chiral compounds with different polarity. This work not only demonstrates the powerful potential of BPDS-PBIM as a chiral stationary phase but also suggests its broad application prospects in fields such as pharmaceutical analysis, flavor and fragrance quality control, and chemical reaction monitoring.
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DOI
PubMed
高影响因子
Small Structures
·
2025
·
IF 11.3
Tian Li,JiaTong Li,DanDan Zhi,Jinzhe Li,Wenting Deng,RunHua Zhang,Renchi Qin,Qing Qi,Chul B. Park,Li Ma,Fanbin Meng
In response to the increasing need for high-performance microwave absorption materials (MAMs), this study introduces a multiaxis electrospinning method for synthesizing graphene-based aerogel microspheres (GAMs) aimed at broadband microwave absorption (MA). The micro/nanostructures and shell configurations of GAMs are effectively regulated and controlled to establish a predictable structure-properties relationship via establishing equivalent electromagnetic (EM) models. The computational simulations results of the structure–property relationship are employed as guidance to evaluate the effects of structural features, like hollow structures and multilayered shells. The analysis reveals that enhancing the hollow cavity optimizes impedance matching and promotes MA performance. Utilizing these insights, the fabricated hollow GAMs (HGAMs) achieve an effective absorption bandwidth (EAB) of 8.1 GHz and an optimal reflection loss of −34.8 dB at 3.3 mm thickness. Further simulations involving various hierarchical structures of GAMs arranged into mono/bilayer arrays investigate the group coupling effects on MA performance through the synergistically absorptive, interferential, and resonant attenuation mechanisms. Actual MA performance examination using an arch method on HGAM bilayer arrays confirms the simulations, achieving an EAB of 15 GHz at a thickness of 7 mm. Consequently, this approach demonstrates a promising avenue for developing lightweight, nanostructured MAMs suitable for advanced applications.
研究领域:
材料科学
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电磁学
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纳米技术
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DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2021
·
IF 6.953
Yanlei Hu,Mengyue Shi,Liang Liu,Juan Yu,Yimin Fan
Bionanomaterial based hydrogels originated from natural biopolymer have drawn much attention for advanced applications. However, nanosilk-based hydrogels derived from top-down approaches remain in their infancy. First, nanosilks based on existing methods fail to prepare hydrogels; second, both nanosilk extraction and surface modification remain a challenge due to high crystallinity and sophisticated hierarchical structures. To produce nanosilk-based hydrogels, pretreatment and oxidation are necessary. In this work, pretreatments were conducted first to loosen the sophisticated structures of natural silk fibers, NaClO oxidation was utilized in succession to introduce carboxyl groups onto silk fibroin . Combined with moderate mechanical disintegration, silk nanocrystals with additional carboxyl groups were prepared facilely. Finally, silk nanocrystal-based hydrogels were prepared successfully through gas phase coagulation. An optimization of pretreatment approaches and oxidation conditions was carried out. The morphologies, chemical and crystalline structures of original, pretreated and oxidized silk fibroin as well as nanofibrillated silk were investigated. In addition, the silk nanocrystal-based hydrogel exhibited outstanding mechanical properties compared to those of dissolved and regenerated silk fibroin-based hydrogels. Moreover, silk nanocrystal-based aerogels present highly porous, interconnected, and crisscrossed network nanostructures, which are ideal candidates for tissue regeneration and provide new prospects as porous scaffolds for bioengineering applications.
研究领域:
生物材料学
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纳米技术
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组织工程
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DOI
高影响因子
CELLULOSE
·
2021
·Vol. 28
·期 16
·10415-10424
·
IF 5.044
Huang Da,Li Dong,Mo Kangwei,Xu Rui,Huang Yanan,Cui Yande,Zhang Qunchao,Chang Chunyu
Owing to non-degradable waste plastics causing serious environmental pollution, the development of natural polymeric materials has become an important topic. Herein, multilayer tunicate cellulose films (MTCFs) were fabricated by a top-down approach, where the alkali treated mantles of tunicate were layer-by-layer hot-pressed. Strong hydrogen bonds that formed between tunicate cellulose layers resulted in good interfacial compatibility of multilayer films. The as-prepared MTCFs exhibited improved thermal stabilities, excellent mechanical properties, and good degradability in natural soil. This work provided a top-down approach for the preparation of biodegradable multilayer films as packaging materials.
研究领域:
材料科学
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环境科学
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生物技术
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DOI
高影响因子
COMPOSITE INTERFACES
·
2023
·
IF 2.6
Shi Jiawei,Bai Xuemeng,Zheng Yahui,Che Jianfei,Xiao Yinghong
A novel bone tissue engineering material with a merit of good biocompatibility and excellent mechanical properties was fabricated with a top-down method. In this work, sugarcane was first treated in NaClO2/acetate buffer to remove lignin, i.e. delignification, and the effect of delignification on pore size of sugarcane is explored bby varying the soaking time in the buffer. Results show that 4 h is the optimal delignification time to ensure good mechanical properties of the sugarcane. The subsequent surface modification with alendronate trihydrate has an advantage to facilitate the final deposition of hydroxyapatite (HAp) due to the fact that the introduction of phosphate groups can effectively improve the nucleation efficiency of HAp. We found that the deposited HAp on sugarcane stem templates can form a bioactive hybrid scaffold material with a hierachical pore structure. Fortunately, during the delignification process of the cellulose structure in the sugarcane stem is not destroyed, thus the hierarchical pore structure remains. The final obtained hybrid scaffold presents a three-dimensional anisotropic porous structure and its longitudinal strength is much higher than the radial strength. The anisotropic property can provide a good mechanical support for scaffold applications. Moreover, the CCK-8 test shows that the cell viability is higher than 95%, indicating that the scaffold exhibits no cytotoxicity. Our investigation demonstrates that the presented hybrid scaffold derived from sugarcane stem has a great potential in the application of bone tissue engineering.
研究领域:
生物材料学
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组织工程学
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DOI
高影响因子
Analytical Methods
·
2022
·Vol. 14
·期 37
·3638-3643
·
IF 3.532
Jianwei Xin,Zhiwei Hu,Yangyang Liu,Lili Qiu,Zihui Meng,Wenxin Zhang,Jing Fan,Min Xue
Photonic crystals have been widely explored for biosensing. However, the complicated procedure for the self-assembly of multi-dimensional photonic crystals has driven researchers to look for more economical protocols for preparing photonic crystals. Furthermore, in situ monitoring of glucose with photonic crystals is the main technique used for controlling diabetes. A one-dimensional (1-D) photonic crystal gel sensor was prepared with a top–down method using a commercially available CD-R or DVD-R disc as a nanomold. The 1-D photonic structure was cast on a glucose-sensitive hydrogel. It was observed that the 1-D photonic crystal cast by DVD-R has a good response ability to glucose, as well as a good linear response relationship in the range of 0.1–4 mM glucose, with an adjusted R2 of 0.99 of the linear fitting curve. The sensor also has a good response ability to the detection of glucose in urine. The limit of detection (LOD) is 0.1 mM. The 1-D photonic crystal sensor utilizing the existing optical disc microstructure as a template shows the advantages of its simple preparation, short production cycle, and low cost. It also has great application potential in the preparation of point-of-care (POC) sensors.
研究领域:
材料科学
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生物医学工程
·
分析化学
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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）