Materials Chemistry Frontiers
·
2020
·Vol. 5
·期 3
·1477-1485
·
IF 6.788
Jing Wang,Shuping Xu,Aisen Li,Lei Chen,Weiqing Xu,Hongyu Zhang
A polymorph is an ideal crystal model for studying the structures affect the optical waveguide behaviors of organic cocrystals, resulting from their multiple crystal structures with the same compositions. However, the polymorphism-based optical waveguide properties of cocrystals are rarely reported. Here, two polymorphic cocrystals of 9-acetylanthracene-1,2,4,5-tetracyanobenzene in a novel sheet-like form α and a known bulk form β were prepared by the evaporation of a donor (D)/acceptor (A) solution mixed in a ratio of 1 : 1 in a mixed acetonitrile and tetrahydrofuran solution. The two polymorphs present different molecular stacking structures due to the diverse intermolecular hydrogen bond interactions, causing differences in their intermolecular charge transfer (CT) interactions and photophysical properties. Structural and spectroscopic analyses revealed stronger CT transition in the form β than in the form α. Polymorphism-based luminescence properties and morphology- and color-dependent optical waveguide behaviors were observed in the polymorphic CT cocrystals via photoluminescence (PL) micro-imaging. The propagation losses of the form α were 0.37 and 0.6 times less than those of the form β in parallel and perpendicular direction with respect to the growth direction, respectively. Three-dimensional (3D) stereoscopic mode optical waveguide behaviors can be observed in the form β. The study provides a good method for the preparation and detection of polymorphic materials. The optical waveguide properties of the cocrystals were tuned by the crystal phase, which is helpful for a deep understanding of the structure-optical functional relation in organic cocrystals. The study will open new potential applications of cocrystal materials in 3D photonic and optoelectronic devices.
研究领域:
材料科学
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光学
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晶体学
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产品关联
DOI
高影响因子
ORGANIC ELECTRONICS
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2022
·
IF 3.868
Hao-Feng Lin,Xiao-Xu Yang,Song Chen,Ya-Ru Kang,Jue Wang,Zhen-Yu Jiang,Woochul Yang,Shulai Huang,Yan Xi,Xue-Dong Wang,Wan-Feng Xie
It has been demonstrated that organic semiconductor micro-/nanocrystals with multicolor emission/waveguide characterizations would be widely utilized as ideal building blocks for the next generation of miniaturized optical, electronic and logic operation devices. However, rational synthesis of one dimensional micro-/nanocrystals with multicolor emission and optical waveguide performances are highly desirable and still remain a challenge. Here, the DCM doped Alq 3 single-crystalline microrods are fabricated via a facile solution-exchange method. It is found that a redshift in light-emission frequency is extremely sensitive to the doping concentration of 4-(dicyano-methylene)-2-methyl-6-(4-dimethylamino-styryl)-4Hpyran (DCM) guest molecule. The green emission at 527 nm of Alq 3 is the main emitting peak when doping concentration of DCM in Alq 3 :DCM is less than 150:1. Then, when the doping concentration of DCM in Alq 3 :DCM is larger than 100:2 such as 100:10, the red emission at 635 nm becomes the dominant emitting peak, the redshift amounts can reach to roughly 108 nm. In addition, the DCM-doped Alq 3 microrods exhibit a lower optical loss of 0.019 dB/μm as a multicolored waveguide material. Therefore, it is demonstrated that the DCM-doped organic micro/nano crystals can be utilized as a promising building block for various optoelectronic components.
研究领域:
材料科学
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光学工程
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产品关联
DOI
高影响因子
ACS Nano
·
2015
·
IF 12.881
Qi Li,Yi Jia,Luru Dai,Yang Yang,Junbai Li
Diphenylalanine (FF) microrods were obtained by manipulating the fabrication conditions. Fourier transform infrared (FTIR), circular dichroism (CD), fluorescence (FL) spectroscopy, and X-ray diffraction (XRD) measurements revealed the molecular arrangement within the FF microrods, demonstrating similar secondary structure and molecular arrangement within FF microtubes and nanofibers. Accordingly, a possible mechanism was proposed, which may provide important guidance on the design and assembly manipulation of peptides and other biomolecules. Furthermore, characterization of a single FF microrod indicates that the FF microrod can act as an active optical waveguide material, allowing locally excited photoluminescence to propagate along the length of the microrod with coupling out at the microrod tips.
研究领域:
生物化学
·
材料科学
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
TRANSACTIONS OF THE INSTITUTE OF MEASUREMENT AND CONTROL
·
2023
·
IF 1.8
Patigu Maimaiti,Patima Nizamidin,Nuerguli Kari,Buayishamu Kutilike,Abliz Yimit
This study concerns the development of a maghemite (γ-Fe2O3)-coupled tetra sulfophenyl porphyrin (TSPP) thin film–based optical waveguide (OWG) sensor (TSPP-γ-Fe2O3-OWG) for the detection of ethylenediamine (EDA). For ease of manufacture, we fabricated sensors using a spin-coating technique, and characterized their response based on their ultraviolet-visible (UV-vis) absorption spectra and the response intensity of OWG sensor. We have observed significant changes in the location of the peaks in the sensor’s UV-vis absorption spectra after exposed to EDA gas, indicating aggregation of TSPP. Optical characterization confirmed that the combination of TSPP with maghemite (TSPP-γ-Fe2O3-OWG) had improved device response, with twice as high as those of the acid-treated TSPP-OWG sensor, and 30 times higher than that of the pure γ-Fe2O3-OWG sensor. At ambient temperature, the composite sensor exhibited a linear response to EDA gas in the concentration range of 0.1–1000 ppm with signal-to-noise ratio (S/N) 8.33, confirming that the improved stability of the composite TSPP-γ-Fe2O3 thin-film OWG enables the detection of trace amounts of gas with high sensitivity and selectivity.
研究领域:
材料科学
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化学传感器
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光学器件
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2021
·
IF 8.128
Jiarui Xia,Bingbing Sun,Chenlei Wang,Nan Sun,Hongqian Cao,Yi Jia,Yang Yang,Junbai Li
Hypothesis Crystalline self-assemblies of diphenylalanine (FF) are since long back considered to be related to Alzheimer's disease. An improved understanding of the mechanism behind the formation of such structures can lead to strategies for investigating the dynamic processes of assembly and disassembly of FF. Experiment The assembly, disassembly and reassembly of FF crystals are influenced by the solvent composition and can be triggered by evaporation of solvent. In this work these processes are directly monitored, and the structures obtained are analyzed. Findings The role of the solvent for assembly, disassembly and reassembly of diphenylalanine crystals has been demonstrated. The initial crystal structure formed via self-assembly of FF monomers can be transformed into needle-like crystals and further to hollow hexagonal microtubes through evaporation of the solvent. It is shown that all the assembly-disassembly processes are spontaneous and driven by thermodynamics. It is also found that some of the crystalline structures exhibit optical waveguiding properties.
研究领域:
生物化学
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材料科学
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医学
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Longshi Rao,Shengxin Zhu,Yang Liu,Qiuling Bai,Jiaying Liu,Mingfu Wen,Qingxian Liu,Guisheng Zhong,Xiaodong Niu
Halide perovskite solar cells (HPSCs) are a promising technology for solar energy conversion, owing to their low cost and high efficiency. However, their practical deployment is limited by instability and degradation under prolonged sunlight exposure. This study addresses these challenges by integrating fluorescent solar concentrators (FSCs) with HPSCs. FSCs, which combine fluorescent materials with an optical waveguide medium, offer a promising solution by enhancing light harvesting while reducing the direct exposure of solar cells. We present a multi-colored carbon dots (CDs)-based FSC designed to tackle key issues related to light efficiency, reabsorption, and stability. The CDs are synthesized to exhibit high photoluminescence quantum yield, substantial Stokes shifts, and excellent photothermal stability. Additionally, the optical waveguide structure is optimized through simulation tools to maximize light gathering efficiency. Simulation results demonstrate that a five-layered equilateral triangular waveguide structure can achieve up to 100% light gathering efficiency, effectively overcoming the limitations of traditional materials’ refractive indices. The integration of optimized FSCs with HPSCs reduces temperature stress mitigates UV degradation, and minimizes spatial footprint. The combination of the multi-colored CDs and optimized waveguide structure leads to a significant performance boost, achieving an optical efficiency of up to 16.95%. This work offers a cost-effective and scalable approach for improving the optical efficiency and stability of HPSCs, with promising applications in building-integrated photovoltaics, smart windows, and rooftop solar systems.
研究领域:
材料科学
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光学工程
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可再生能源技术
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产品关联
DOI
高影响因子
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2015
·Vol. 15
·期 8
·6015-6019
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IF 1.556
Wu Hao-Di,Xiao Yan,Liu Zheng-Hui,Wang Feng-Xia,Pan Ge-Bo
2D microstructures of N′N′-diphenyl-N,N′-bis(1-naphthyl)-1,1'-biphenyl-4,4'-di-amine (NPB) have been prepared by a facile solution method and fully characterized. The as-prepared NPB microsheets have well-defined shapes and very smooth surfaces, and are
ideal building blocks for 2D optical waveguides. The results indicate that the optic losses within NPB microsheets are closely related to the direction of propagation, and the shape of microsheets can change the direction of waveguiding light. Such 2D optical waveguides may have potential
applications in future miniaturized light-based circuits serve as interconnectors different from 1D optical waveguides.
研究领域:
材料科学
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光学
·
光子学
✓ 已验证
DOI
PubMed
高影响因子
DYES AND PIGMENTS
·
2023
·
IF 4.5
Kui Chen,Jingkang Wang,Wenbo Wu,Huiting Shan,Hongtu Zhao,Na Wang,Ting Wang,Xin Huang,Hongxun Hao
Organic crystals with flexibility have been a research hotspot due to their huge potential in flexible optoelectronics . However, most organic crystals are brittle, which greatly restricts their application in flexible smart materials. Herein, a flexible crystal with multi-faced elastic bending and plastic twisting was reported. Even after undergoing severe twisting deformation, it could be freely bent in any direction due to the twisted shape, thus achieving the transition to three-dimensional (3D) elastic bending. The mechanisms of multiple flexibilities were investigated by detailed experimental analysis and theoretical calculations. Especially, the mechanism of twistable crystals with elasticity was well revealed by microfocus spectroscopy and theoretical calculation, which has not been reported before. It was found that the twisting of organic crystals can be attributed to the molecular rotation without spatial hindrance, abundant weak intermolecular interactions and different orientations of the intermolecular interactions. Finally, taking advantage of its flexibility, its potential application in flexible active and passive optical waveguides was demonstrated.
研究领域:
材料科学
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光学
·
理论计算
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Hongyan Xia,Junjie Cheng,Liangfu Zhu,Kang Xie,Qijin Zhang,Douguo Zhang,Gang Zou
Programmable materials and reconfigurable photonic components, which can change their physicochemical properties and functionalities upon external stimuli, are a major topic of interest in modern science. However, most conventional reconfigurable photonic components rely heavily on mechanical deformation, restricting their application. Herein, a novel strategy based on a dynamically tunable fluorescence resonance energy transfer process to design and fabricate programmable fluorescent micropatterns within single polymer microfiber is proposed. A set of reconfigurable photonic components (including optical switchable waveguide systems, photonic analogies of diodes and transistors, as well as one-dimensional (1D) optical encoding) can be achieved within a single polymeric waveguide microfiber straightforwardly, in which such photonic components can be written, erased, and rewritten as 1D binary patterns with tailored external optical stimuli. These results might be of great fundamental value for the rational design of novel reconfigurable photonic devices with numerous potential applications in highly integrated optical communication components and optical computing devices.
研究领域:
材料科学
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光学工程
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光子学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
OPTICS AND LASER TECHNOLOGY
·
2020
·
IF 3.233
Gulgina Mamtmin,Nuerguli Kari,Renagul Abdurahman,Patima Nizamidin,Abliz Yimit
Optical waveguide (OWG) sensors are widely used in gas detection, and sensitive materials are the key factors affecting sensor performance. Herein, we report on a 5,10,15,20-tetrakis-(4-methoxyphenyl) porphyrin (TMP) deposited optical wave guide (OWG) sensor. The porphyrin solutions with different acidity were deposited on a K + -ion exchanged glass OWG surface by spin coating, to fabricate porphyrin film-coated OWG gas sensing devices. The effects of pH values of the porphyrin solution used to prepare the sensitive film on the sensing properties of these devices were investigated. The gas sensitive performances of these devices in response to analytes were compared. Among them, the sensing devices fabricated using original and acidic solutions of porphyrin exhibited significant responses to sulfide gases and ethanediamine, respectively. The sensing device prepared using an acidic solution has a good response to ethanediamine gas (response and recovery times of the sensor for 1 ppm of EDA (ΔI = 48) are 13 and 38 s, respectively). The RSD of the output light intensity is ±2.84, the signal to noise ratio (S/N) is 5.6. The device prepared using the original solution has an excellent response to sulfide gases (H 2 S, SO 2 ), and can detect low concentration levels (ppm) of sulfide gases. These sensing devices thus have the potential to be used in food quality testing and environmental monitoring.
研究领域:
材料科学
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化学传感器
·
环境监测
✓ 已验证
产品关联
DOI
高影响因子
ACS Nano
·
2023
·
IF 17.1
Songcheng Peng,Ping Xia,Ting Wang,Lan Lu,Peng Zhang,Min Zhou,Feng Zhao,Shiqi Hu,Ji Tae Kim,Jianbei Qiu,Qingyuan Wang,Xue Yu,Xuhui Xu
Pervasive mechanical force in nature and human activities is closely related to intriguing physics and widespread applications. However, describing stress distribution timely and precisely in three dimensions to avoid “groping in the dark” is still a formidable challenge, especially for nonplanar structures. Herein, we realize three-dimensional (3D) stress imaging for sharp arbitrary targets via advanced 3D printing, owing to the use of fluoride nanocrystal(NC)-based ink. Notably, a fascinating mechano-luminescence (ML) is observed for the homogeneously dispersed NaLuF4:Tb3+ NCs (∼25 nm) with rationally designed deep traps (at 0.88 and 1.02 eV) via incorporating Cs+ ions and using X-ray irradiation. Carriers captured in the corresponding traps are steadily released under mechanical stimulations, which enables a ratio metric luminescence intensity based on the applied force. As a result, a significant mechano-optical conversion and superior optical waveguide of the corresponding transparent printed targets demonstrate stress in 3D with a high spatial and temporal resolution based on stereovision. These results highlight the optical function of the 3D-printed fluoride NCs, which cast light into the black boxes of stress described in space, benefiting us in understanding the ubiquitous force relevant to most natural and engineering processes.
研究领域:
材料科学
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纳米技术
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光学
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机械工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
OPTICS EXPRESS
·
2023
·Vol. 31
·期 16
·25662-25679
·
IF 3.8
Qin Tan,Shengnan Wu,Shengnan Wu,Shengnan Wu,Zhenchao Liu,Xiaolu Chen,Sailing He,Sailing He,Sailing He
Disturbance of surrounding temperature inevitably affects the accuracy of fiber biosensors. To that end, we propose a compact label-free optofluidic sensor based on a polished hollow core Bragg fiber (HCBF) that can simultaneously measure the cortisol concentration and surrounding temperature in real-time. The sensor is comprised of fusion splicing single mode fiber (SMF), multimode fiber (MMF) and HCBF. HCBF is side polished to remove part of the cladding that the suspended inner surface of the fiber can contact the external environment. After the incident light passes through the MMF from the SMF, it enters the hollow area, high refractive index (RI) layers, respectively, where the anti-resonant reflecting optical waveguide (ARROW) guiding mechanism and Mach-Zehnder interferometer (MZI) are simultaneously excited. Taking advantage of the high RI layers of HCBF, compared to the fiber with uniform cladding, the light can be more confined in the cladding and more sensitive to inner surface medium. The inner surface of sensor is immobilized with cortisol aptamer for the sake of achieving high sensitivity and specific sensing of cortisol with the limit of detection (LOD) to be 4.303 pM. The proposed sensor has a compact structure, enables temperature compensation, and can be fabricated at low cost making it highly suitable for in-situ monitoring and high-precision sensing of cortisol and other biological analytes.
研究领域:
光学
·
生物传感
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材料科学
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生物医学工程
✓ 已验证
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）