Advanced Optical Materials
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2024
·Vol. 12
·期 20
·2400498
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IF 8
Rui Fang,Zhiyuan Bai,Xilu Wu,Qingchao Fan,Bingwei Bao,Chengyi Hou,Qinghong Zhang,Yaogang Li,Kerui Li,Hongzhi Wang
Reflective electrochromic (EC) technology is expected to e-paper display field, and integrating optical reflective electrolyte as the optical reflective layer is a common strategy for constructing reflective EC devices. Compositing inorganic particles and electrolytes is one of the simplest and most efficient composite methods, but these composite electrolytes usually cannot perform well together in terms of both optical and electrochemical properties. Herein, the TiO 2 nanoparticles are added to the ethyl viologen-based ionogel (T-EVG, one typical kind of EC/electrolyte) to have the highest visible light reflectivity and the best electrochemical performance compared with SiO 2 , Al 2 O 3 , and ZnO nanoparticles, which is attributed to the electro-induced self-reduction TiO 2 produced in T-EVG during EC cycling. Meanwhile, the corresponding EC devices can display red, green, and blue, and have high optical contrast (CIE Lab: ΔE>38), fast switching spend (<4 s, the fastest is 5 Hz), ultra-low power density (<4.0 mW cm −2 ), and excellent cycling stability (>85% retained after 10 000 cycles). Finally, a simple 3×3 pixelated EC display array is prepared, and single- and multi-point (including diagonal points) multi-color display effects are realized through active-matrix driving and high-frequency refresh, demonstrating its application value in the high-performance e-paper display.
研究领域:
材料科学
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显示技术
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DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2022
·Vol. 106
·期 2
·1413-1423
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IF 4.186
Yameng Zhu,Jinpeng Zhu,Hailong Wang,Kaijun Yang,Mingliang Li,Jilin He
Thermal protection materials with high optical reflectivity, low thermal conductivity, and good high-temperature stability are required for the development of laser technologies and the protection of the critical equipment components. Herein, we synthesize a novel thermal protective material, La 0.9 Sr 0.1 Ti 1− x Nb x O 3+ δ (LSTN; x = 0.1, 0.125, 0.15), with different Nb 5+ -ion contents using solid-state sintering. Phase structure analysis demonstrates that LSTN ( x = 0.1, 0.125, 0.15) presents a single-phase monoclinic structure with a uniform element distribution. In particular, the LSTN 0.125 ceramic exhibits ultrahigh optical reflectivity (96%, 2300 nm) and excellent thermophysical properties, such as a high thermal expansion coefficient (10.3 × 10 −6 K −1 , 1000°C), an ultralow thermal conductivity (0.408 W (m K) −1 , 300°C), and excellent high-temperature stability. Aberration-corrected scanning transmission electron microscopy reveals that the disordered substitution of Nb 5+ ions induces numerous lattice distortions and mass fluctuations, which decrease the thermal conductivity, and makes difference in the relative refractive indices of atomic layers causing the high reflectivity of the material. These remarkable properties render the LSTN 0.125 ceramic as an ideal alternative for near-infrared thermal protection applications.
研究领域:
材料科学
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物理学
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DOI
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
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2020
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IF 6.984
Wanchun Wu,Shenghua Lin,Mingming Wei,Jinhua Huang,Hua Xu,Yuehui Lu,Weijie Song
Saharan silver ants can inhabit one of the hottest areas, the Sahara Desert, which benefits from their thermoregulatory functionality, thanks to a sophisticated photonic structure of hairs. Mimicking the photonic structure, we fabricated the flexible hair-like photonic structures on polydimethylsiloxane (PDMS). Attaching them to glass bottles for a proof-of-concept demonstration, the considerably enhanced optical reflection was observed as well as the slightly improved mid-infrared emission. These extraordinary properties enabled the temperature of the glass bottles to be reduced by around 5.6 °C in the hot daytime and keep relatively warm in the cold nighttime. On the basis of optical and thermal properties of the silver ants-inspired photonic structures, potential applications could be further found in wearable devices and personal thermal management.
研究领域:
材料科学
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生物仿生学
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DOI
高影响因子
ACS Applied Electronic Materials
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2022
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IF 4.494
Shuokun Sun,Shichuang Cui,Fei Wang,Mingrui Gao,Wei Wei,Jinxiu Dong,Xiaoyan Xia,Quanyao Zhu,Jinyong Zhang
Electrochromic devices show great potential for color switchability and ease of manipulation for reflection tuning. However, the devices’ color fit and cycle stability make it difficult to meet the requirements of functional reflective product applications. Herein, a vanadium pentoxide (V2O5)–cellulose composite electrochromic film with remarkable cycling stability and a wide range of color options is presented. Flexible reflective electrochromic devices realizing free switching between yellow and blue were successfully assembled by the prepared composite films; in the test, the device possesses a low drive voltage (±1 V) and a rapid switching response time (≤5.6 s) and excellent working status after 1000 cycles. Besides, the assembled devices demonstrated an exceptional range of optical reflection modulation upon excitation. This study presents a direction for the selection of suitable devices in the field of flexible functional materials and broadens the scope of electrochromic applications.
研究领域:
材料科学
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电化学
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DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2016
·Vol. 133
·期 30
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IF 1.866
Guiming Xie,Pengju Pan,Yongzhong Bao
Evolutions of drop/particle size and size distribution in liquid–liquid dispersions and suspension polymerizations of methyl methacrylate (MMA) were monitored by using an online optical reflectance measurement (ORM), and effects of operating parameters such as the agitation rate, concentration of poly(vinyl alcohol) (PVA) dispersant, and initial concentration of poly(methyl methacrylate) (PMMA) in MMA monomer on the Sauter mean diameter ( d 32 ) and size distribution of drop/particle were investigated. According to the variations of d 32 of drops/particles with time, four characteristic particle formation stages can be identified for suspension polymerization process. The factors that lead to increase the rate of drop break up, such as increasing of concentration of PVA and decreasing of viscosity of dispersed phase, would postpone the particle growth stage. The d 32 and size distribution breadth of drops/particles were significant increased when the liquid–liquid dispersions or suspension polymerizations were conducted at low PVA concentrations or MMA/PMMA solutions with high PMMA contents were used as the dispersed phase, in consistent with the scanning electron micrograph observation on final PMMA particles. It is clear that ORM can be effectively applied in online monitoring of size and size distribution of drops/particles in the liquid–liquid dispersions and suspension polymerizations. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016 , 133 , 43632.
研究领域:
高分子化学
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化学工程
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反应工程
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材料科学
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过程监测
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DOI
高影响因子
BMC Ophthalmology
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2023
·Vol. 23
·期 1
·1-9
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IF 2
Kanclerz Piotr,Hecht Idan,Tuuminen Raimo
Purpose Precise ocular measurements are fundamental for achieving excellent target refraction following both cataract surgery and refractive lens exchange. Biometry devices with swept-source optical coherence tomography (SS-OCT) employ longer wavelengths (1055–1300 nm) in order to have better penetration through opaque lenses than those with partial coherence interferometry (PCI) or low-coherence optical reflectometry (LCOR) methods. However, to date a pooled analysis showing the technical failure rate (TFR) between the methods has not been published. The aim of this study was to compare the TFR in SS-OCT and in PCI/LCOR biometry. Methods PubMed and Scopus were used to search the medical literature as of Feb 1, 2022. The following
研究领域:
眼科
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生物医学工程
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医学影像技术
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Qiong Duan,Lin Lin,Yue Liu,Xinlong Tang,Liang Fang,Chunhua Lu,Zhongzi Xu
Inspired by tortoise beetle, a novel method for preparing sustainable films, leveraging the on-demand embedding or release behavior of the functional fillers to impart or eliminate functions to the film is reported. The microscopic shape-memory behavior of the film surface was characterized using microscopy techniques and finite-element analysis to investigate the embedding and release of single micro-/nanospheres on the film surface, which were affected by sphere diameters and programming temperatures. By utilizing different functional fillers and distribution densities, the transformation and tunability of film properties such as optical reflection and fluorescence was demonstrated. Different functions of the film were altered through multiple cycles, showcasing the ability to immobilize patterns, step-wise release, recycle materials and create temperature-sensitive anticounterfeiting codes and decoration on objects. This approach offers a promising avenue for developing sustainable films with tunable functions and highlights the potential for recycling functional fillers, contributing to both environmental sustainability and material reusability.
研究领域:
材料科学
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可持续性
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纳米技术
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表面工程
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DOI
高影响因子
危险品化学品经营许可证（带存储）