JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2018
·Vol. 102
·期 7
·3972-3979
·
IF 2.956
Sanyuan Hu,Tao Chen,Jianye Liang,Huamin Zhou,Dequn Li,Heping Li,Youwei Yan
The fast developing electronic industry boosts higher demand of transparent electrode. Nanofiber network design provides a new platform for finding alternative materials to replace the traditional indium-doped tin oxide (ITO) film as transparent electrode. In this work, the TiN nanofiber network with a micron-scale precise geometry was firstly assembled by solution electrowriting. Unlike the ordinary opaque TiN film or bulk, the geometry patterned TiN nanofiber network achieved an ultrahigh transparency above 90%. Due to the electrical conductive virtue of TiN, the network reached a relatively low sheet resistance of 10.3 Ω/sq that can be comparable to ITO and even metal nanofibers. The combination of high transparency and low sheet resistance in TiN nanofiber network paves a way for its application as transparent electrode. Moreover, the figure-of-merit of TiN nanofiber transparent electrode was controllable by simply adjusting the geometry size of TiN nanofiber pattern. A series of oxidation resistance and corrosion resistance tests were additionally carried out, which caused little effect on the performance of TiN nanofiber transparent electrode. This excellent antioxidative and anticorrosive property demonstrates the high chemical durability of TiN nanofiber network, especially compared to metal nanofiber networks.
研究领域:
材料科学
·
电子工程
✓ 已验证
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2016
·
IF 4.219
Lei Tao,Fei Song,Naiyu Xu,Duxin Li,Robert J. Linhardt,Zhenqing Zhang
Hyaluronic acid (HA), a glycosaminoglycan, is a linear polysaccharide with negative charge, composed of a repeating disaccharide unit [→4)-β- d -glucopyranosyluronic acid (1 → 3)-β- d - N -acetyl- d -glucoaminopyranose (1 → ] n ([→4) GlcA (1 → 3) GlcNAc 1 → ] n ). It is widely used in different applications based on its physicochemical properties associated with its molecular weight. Enzymatic digestion by polysaccharides lyases is one of the most important ways to decrease the molecular weight of HA. Thus, it is important to understand the action patterns of lyases acting on HA. In this study, the action patterns of two common lyases, Flavobacterial chondroitinase AC I and Streptomyces hyaluronidase, were investigated by analyzing HA oligosaccharide digestion products. HA oligosaccharides having an odd-number of saccharide residues were observed in the products of both lyases, but their distributions were quite different. Chondroitinase AC acted more efficiently at the β 1–4 glycosidic bond linking GlcNAc and GlcA. Oligosaccharides, having an even number of saccharide residues, and with an unsaturated uronic acid (4-deoxy-α- l - threo -hex-4-enepyranosyluronic acid, △UA) residue at their non-reducing end represent the major product. A minor amount of oligosaccharides having an odd number of saccharide residues resulted from the irregular terminal residues of HA substrate chains. Hyaluronidase showed a more complicated product mixture. Its minimum recognition and digestion domain is HA heptasaccharide and it could cleave both β 1–4 and β 1–3 glycosidic linkages. The HA oligosaccharides, generated with a 2-acetamido-2,3-di-deoxy-β- d - erythro -hex-2-enopyranose (△HexNAc) at the non-reducing end, are believed to be unstable and undergo breakdown immediately after their generation, and the oligosaccharides with △UA residue at the non-reducing end are formed. Thus, oligosaccharides having both an even and odd-number saccharide residues with a △UA residue at their non-reducing ends, represent the major products of hyaluronidase acting on HA.
研究领域:
生物化学
·
分子生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2018
·Vol. 136
·期 13
·47305
·
IF 1.901
Guangji Zou,Pingli Wang,Wutong Feng,Zhonglai Ren,Junhui Ji
Transparent polyamide (TPA) is a type of optically transparent material with high performance, and poly(decamethylene terephthalamide) (PA10T) is an emerging bio-based opaque polyamide. With the purpose of preparing bio-based and low-cost TPA based on PA10T, we chose dodecanedioic acid and isophthalic acid as comonomers, and successfully obtained a series of transparent PA10T/10I/1012. The basic properties of these copolyamides were characterized by intrinsic viscosity measurement, Fourier transform infrared spectrometer, proton nuclear magnetic resonance, X-ray diffraction, differential scanning calorimetry, thermogravimetric analysis, dynamic mechanical analysis, ultraviolet–visible spectrophotometer, solvent resistance test, water absorption measurement, and tensile measurement. Results show that PA10T/10I/1012 copolymers are amorphous and have high optical transparency. Moreover, these copolymers exhibit high thermal stability, low water absorption, and good solvent resistance, and they also show better mechanical properties compared to some commercial TPAs. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136 , 136 , 47305.
研究领域:
材料科学
·
聚合物化学
✓ 已验证
产品关联
DOI
高影响因子
Polymers
·
2022
·Vol. 14
·期 13
·2716
·
IF 4.967
Feiyue Wang,Mengtao Cai,Long Yan,Jiahao Liao
Acrylamide-methacrylic acid copolymer named P (AM-co-MAA) was synthesized via aqueous solution polymerization, and then mixed with crosslinker, flame retardants and initiators to prepare multifunctional transparent flame-retarded hydrogels with transparency, fire resistance and anti-ageing property. The results show that the application of multifunctional transparent flame-retarded hydrogel imparts high level of transparency and excellent fire resistance to the fire-resistant glass, and the light transmittance and fire resistance of the flame-retarded hydrogel increases with the increasing mass ratio of AM to MAA in P(AM-co-MAA). When the mass ratio of AM to MAA is 4:1, the obtained P(AM-co-MAA) imparts the lowest backside temperature of 130 °C at 3600 s and highest light transmittance of 86.1% to the transparent flame-retarded hydrogel. TG and DSC analysis show that the addition of P(AM-co-MAA) increases the thermal stability of the transparent flame-retarded hydrogels due to the formation of numerous hydrogen bonds via the complexation between amide and carboxyl groups. Accelerated ageing test indicates that the transparent flame-retarded hydrogel containing P(AM-co-MAA) exerts durable fire resistance and transparency, and the ageing resistance of the transparent flame-retarded hydrogel depends on the mass ratio of AM to MAA in P(AM-co-MAA). Therefore, this study provides a promising strategy to prepare a novel multifunctional transparent flame-retarded hydrogel with excellent light transmittance, fire resistance and anti-ageing properties.Keywords:multifunctional transparent flame-retarded hydrogels;fire-resistant glass;fire resistance;anti-ageing property;transparency
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2024
·
IF 8
Mengyao Qi,Yi Ke,Yifei Li,Peng Li,Huakuo Zhou,Xia Zhang,Jieshi Chen,Jun Meng
Hyaluronidase (HAase), is a naturally occurring glycosidase with the ability to break down glycosidic bonds within hyaluronic acid (HA) chains. In this paper, we propose a portable smartphone and Surface-enhanced Raman scattering (SERS) dual-mode sensor based on Au@Pt nanozyme coated with HA hydrogel to realize sensitive detection of HAase. Au@Pt nanozyme has excellent peroxidase-like activity, oxidase-like activity and catalase-like activity under acidic conditions. When HAase is present, the hydrogel structure of HA was hydrolyzed and gradually released Au@Pt nanozyme. The released Au@Pt nanozyme is used to catalyze the hydrogen peroxide system, so that 3,3′,5,5′-tetramethylbenzidine (TMB) can be oxidized into blue 3,3′,5,5′-tetramethylbenzidine (TMB ox ). Therefore, based on the above strategies, a dual-mode sensing platform for HAase detection by smartphone and SERS was established. The linear range of the dual-mode sensor platform are 2–30 U/mL and 2–80 U/mL, and the detection limits are 1.0386 U/mL and 0.004 U/mL, respectively. The dual-mode smartphone and SERS sensor platform, a combination of smartphone and Raman spectrometer, is successfully further applied to biological urine samples. This portable dual-mode sensor based on intelligent hydrogel coated nanozyme not only opens up a new way for instant detection, but also has potential applications in clinical diagnosis.
研究领域:
生物化学
·
医学诊断
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2019
·Vol. 43
·期 8
·3383-3389
·
IF 3.069
Lin Ma,Wenjuan Gao,Xue Han,Fengli Qu,Lian Xia,Rong-Mei Kong
Hyaluronidase (HAase) has been reported as a diagnostic and prognostic urinary biomarker for bladder cancer. Simple and sensitive methods capable of quantitatively detecting HAase are desired for tumor diagnosis and therapy at its early stage. Herein, a label-free and fluorescence “turn-on” assay for sensitive detection of HAase was established based on the electrostatic assembly of a water-soluble cationic perylene diimide derivative (PDI) and hyaluronic acid (HA). The electrostatic assembly of HA–PDI between the positively charged PDI and the negatively charged HA resulted in an efficient aggregation-caused quenching (ACQ) of PDI. In the presence of HAase, the enzyme catalyzed hydrolysis of HA led to the failure of aggregation of PDI and thus the fluorescence of PDI was retained. HA was used to function not only as a scaffold to agglomerate PDI but also as a substrate for enzymatic reactions. The efficient ACQ and the specific enzymatic reaction induced failure of aggregation of PDI endowed the developed HA–PDI assembly with high sensitivity and specificity for the detection of HAase with a detection limit of 0.03 U mL−1. Moreover, the facile detection process and rapid response of the assay made it applicable for reliable detection of HAase in human serum and urine samples.
研究领域:
生物化学
·
医学诊断
·
肿瘤学
✓ 已验证
产品关联
DOI
高影响因子
npj Flexible Electronics
·
2022
·Vol. 6
·期 1
·1-14
·
IF 12.019
Tang Jie,Zhao Chao,Luo Qian,Chang Yu,Yang Zhenguo,Pan Tingrui
Emerging tactile sensing devices mimic biological functions of human mechanoreception. By introducing the feature of optical transparency, it can lead to a combined capacities of tactile and visual intelligence into single system. Yet, it is difficult to realize ultrahigh level of optical transparency and device sensitivity in single structure, for the widely used methods for sensitivity improvement, such as elevating the interfacial roughness, may further reduce the transparency. By utilizing a transparent ionic material with tunable surface topologies, as well as introducing a strategy of refractive index matching, we have proposed a transparent iontronic sensing (TIS) device based on the iontronic sensing mechanism, simultaneously offering combined high device sensitivity (83.9 kPa −1 ), with ultrahigh optical transparency (96.9%), the highest reported value in literature. Benefiting from its comprehensive performance in sensing and optical characteristics, the TIS devices hold enormous potential for the human-machine interfaces for industrial and medical applications.
研究领域:
生物医学工程
·
材料科学
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 66
·53926-53934
·
IF 3.84
Yu Zhou,Guofei Chen,Huiwen Zhao,Liping Song,Xingzhong Fang
A series of transparent polyimides was prepared from trans-1,4-bis(2,3-dicarboxyphenoxy)cyclohexane dianhydride (trans-3,3′-CHDPA) with various aromatic diamines via one-step solution polycondensation. The glass transition temperatures (Tgs) of the resulting polyimides were in the range of 206–255 °C. These polyimide films showed high optical transparency with cut-off wavelengths of 370–379 nm, and they exhibited good mechanical properties with tensile strengths of 65–88 MPa, tensile moduli of 1.7–2.4 GPa, and elongations at break of 4.7–7.5%. Compared with polyimides based on trans-1,4-bis(3,4-dicarboxyphenoxy)cyclohexane dianhydride (trans-4,4′-CHDPA), the polyimides derived from trans-3,3′-CHDPA showed higher Tg, better solubility and optical transparency due to the 3- and 4-position isomeric effect.
研究领域:
材料科学
·
高分子化学
✓ 已验证
DOI
高影响因子
Nano Research
·
2021
·Vol. 15
·期 1
·564-572
·
IF 8.897
Wang Wen,Wang Shuang,Xiang Chenxue,Xue Dan,Li Mufang,Liu Qiongzhen,Piao Longhai,Wang Dong
As a new favorite in the field of smart materials, smart windows, with visual stimulus sensing functions, have attracted extensive attention for their high transparency, sensitive response to environmental stimulus, and reversible changes in light transmittance. In this paper, the PVA- co -PE nanofiber film, which was completely opaque like paper, was used as filling phase and reacted with water-soluble N-vinyl-2-pyrrolidone (NVP) by photopolymerization to produce a flexible transparency polyvinyl pyrrolidone/spraying PVA- co -PE nanofiber films (PVP/SPNFs) composite film. Among them, the small size effect of PVA- co -PE nanofibers played a pivotal role in improving the film’s transparency. Nevertheless, the PVP’s reversible adsorption-desorption behavior of water molecules made its refractive index change dynamically and reversibly, which led to the visual transition of composite film from transparent to opaque just like that of electronic smart windows. Additionally, the reversible transition rate of film’s transparency can be effectively regulated by the nanofiber stack structure. This new design of transparency visualization transforms composite film in response to humidity, innovates the electrically controlled smart windows on energy and realizes the effective utilization of natural resources such as water and humidity, which has a great application prospect in the field of flexible optoelectronic devices, intelligent buildings, and smart writing.
研究领域:
材料科学
·
智能材料
·
仿生学
✓ 已验证
产品关联
DOI
高影响因子
Biomedical Optics Express
·
2024
·Vol. 15
·期 10
·5609-5624
·
IF 2.9
Zizheng Wang,Xiao Xiao,Xiao Xiao,Ziwen Zhou,Yunyin Chen,Tianqi Xia,Xiangyi Sheng,Yiping Han,Wei Gong,Wei Gong,Wei Gong,Ke Si,Ke Si,Ke Si
Many clearing methods achieve high transparency by removing lipid components from tissues, which damages microstructure and limits their application in lipid research. As for methods which preserve lipid, it is difficult to balance transparency, fluorescence preservation and clearing speed. In this study, we propose a rapid water-based clearing method that is fluorescence-friendly and preserves lipid components. FLUID allows for preservation of endogenous fluorescence over 60 days. It shows negligible tissue distortion and is compatible with various types of fluorescent labeling and tissue staining methods. High quality imaging of human brain tissue and compatibility with pathological staining demonstrated the potential of our method for three-dimensional (3D) biopsy and clinical pathological diagnosis.
研究领域:
神经科学
·
生物医学工程
·
病理学
✓ 已验证
DOI
PubMed
高影响因子
Advanced Science
·
2022
·Vol. 9
·期 21
·2201738
·
IF 17.521
Weihong Li,Chongjia Lin,Gan Huang,Jun Hur,Baoling Huang,Shuhuai Yao
Smart windows can selectively regulate excess solar radiation to reduce heating and cooling energy consumption in the built environment. However, the inevitable dissipation of ultraviolet and near-infrared into waste heat results in inefficient solar utilization. Herein, a dual-band selective solar harvesting (SSH) window is developed to realize full-spectrum utilization. A transparent photovoltaic, converting ultraviolet into electricity, and a transparent solar absorber, converting near-infrared into thermal energy, are integrated and coupled with a ventilation system to extract heat for indoor use. Compared with common transparent photovoltaics, the SSH window increases solar harvesting efficiency up to threefold while maintaining a considerable visible transmittance. Simulations suggest that the SSH window, besides generating electricity, delivers energy savings by over 30% higher than common smart windows. This is the first integration of transparent photovoltaic and transparent solar absorber into a window, which may open up a new avenue for the development of energy-efficient buildings.
研究领域:
建筑节能
·
材料科学
·
可再生能源
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Yingchun Shan,Xuemin Xi,Liya Ma,Haoran Guo,Xiaoguang Han,Jiangtao Li,Jiujun Xu
In consolidation of AlON , the extensive decomposition of AlON into α-Al 2 O 3 and AlN during sintering is one of the major reasons that significantly retard its densification process. To accelerate densification of AlON, an ultra-low concentration of La 2 O 3 (0.03 wt%) and Y 2 O 3 (0.02-0.04 wt%) was co-doped as sintering additives to inhibit decomposition of AlON during sintering for fast fabrication of highly transparent AlON ceramics. The phase transformation, microstructure evolution and densification process of the samples undoped and doped additive during heating were studied to investigate the densification mechanism. The results reveal that, compared to the samples undoped additive and single-doped with La 2 O 3 , the α-Al 2 O 3 content of the samples co-doped with La 2 O 3 and Y 2 O 3 is significantly deduced at ≤1600 °C, which indicates that the decomposition of AlON is effectively inhibited by co-doping La 2 O 3 and Y 2 O 3 . The reduction of α-Al 2 O 3 along with the deceleration effect of La 3+ on mass transfer, contributes to more small particles being conserved at high temperatures. Base on this, at later stage of sintering, benefiting from the enhanced mobility of grain boundary by Y 3+ , AlON ceramics with high relative density (99.79 %) and excellent transparency were obtained via pressureless sintering at 1880 °C for 2.5 h by co-doping 0.03 wt% La 2 O 3 and 0.04 wt% Y 2 O 3 . The maximum transmittance of the fabricated AlON ceramics is up to 81.6 % at 3600 nm, and a transmittance of 76.0 % was measured at 400 nm. The ultra-low doping amount of La 2 O 3 and Y 2 O 3 and the high relative density should be the main reasons that lead to the outstanding transparency of the obtained AlON. Additionally, the fabricated AlON ceramics also exhibit a high Vickers hardness of 18.89 ± 0.18 GPa.
研究领域:
材料科学
·
陶瓷工程
✓ 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）