DALTON TRANSACTIONS
·
2021
·Vol. 50
·期 29
·10033-10040
·
IF 4.39
Zhibo Zhang,Ruicong Zhang,Liangge Xu,Jiajun Li,Lei Yang,Yanan Yang,Andrey Bolshakov,Jiaqi Zhu
In recent years, smart windows have been gradually applied and developed in the fields of environmental protection, energy management, smart camouflage and display. With the continuous upgrading of market demand, smart windows with both visible and infrared band modulation functions are the future development trends. However, the optical modulation of smart windows is usually limited in the visible light band (380–780 nm). In this paper, we report a novel smart window by doping antimony doped tin oxide (ATO) nanoparticles (NPs) into polymer stabilized liquid crystal (PSLC) films. These films have the widest waveband modulation function among those reported so far, covering the visible and infrared regions (380–5500 nm). The transmittance of the as-prepared smart films can be changed reversibly from highly transparent (78.5%) state to a strong light scattering (10%) state in the visible region. In addition, due to the localized surface plasmon resonance of ATO NPs, up to 80.7% of the infrared invisible light can be effectively shielded. The significance of this research is to provide theoretical and technical support for the broadband optical modulation of novel smart windows.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Physical Chemistry C
·
2021
·
IF 4.126
Shan Liu,Jing Han,Xuemei Cheng,Xing Wang,Qian Zhang,Bo He,Tengfei Jiao,Zhaoyu Ren
Graphene is a superb material with significant potential in broadband all-optical modulation. However, the mechanism of the all-optical modulation in graphene dispersion is still under debate. Here, we report on a pump power-dependent spatial light modulation by using the 780 nm CW laser as the pump and signal beams via graphene dispersion. The results indicate that graphene is able to convert the Gaussian signal beam into a hollow beam with a ring pattern. Examining the temporal evolution of the ring pattern, we found that spatial cross-phase modulation (SXPM) plays the dominant role at low pump power, while nonlinear scattering (NLS) becomes dominant when the pump power is high. Furthermore, the dependence of the size and intensity of the signal ring pattern on the pump power is investigated. The results can be well explained by SXPM, NLS, and saturation absorption (SA) effects. Finally, an all-optical switch is developed based on the dependence of the signal intensity on the pump power. It is demonstrated that both in-phase and out-phase modulation can be realized in one system. This work not only provides useful information in understanding the mechanism of graphene in interacting with the light, but also suggests a new way to produce hollow beam with tunable size and achieve an all-optical switch with both in-phase and out-phase modulation.
研究领域:
光学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Qiangqiang Wen,Yuwei Ma,Fenglong Zhang,Han Sun,Weixiang Shang,Qiang Wang,Jinxiao Bao
Herein, we report a kind of structural and functional integrated ceramic material with excellent mechanical and optical properties . A series of Er-doped Zr 6 Nb 2 O 17 ceramic samples were prepared by the high-temperature solid-phase method, which showed reversible photochromism from light curry to dark brown under the alternating action of 365 nm UV light and heat treatment at 350 °C. The photochromic process is fully reversible and has good cyclic stability with a maximum photochromic contrast of 20.1%. The fluorescence modulation behavior based on the photochromic reaction can effectively modulate the emission of Er 3+ , and the maximum fluorescence modulation ratio reaches 62%. The best Vickers hardness and fracture toughness values of the prepared Zr 6 Nb 2 O 17 : Er ceramics reached 15.88 GPa and 4.5 MPa m 1/2 respectively. The mechanisms of the observed photochromism, photoluminescence , and fluorescence modulation were studied systematically. This work is expected to provide significant guidance for the development of high-performance colored ceramic materials and broaden its market application field.
研究领域:
材料科学
·
光学工程
✓ 已验证
DOI
高影响因子
Nanophotonics
·
2019
·Vol. 8
·期 12
·2215-2223
·
IF 6.908
Er Pan,Gongxun Bai,Yutao Peng,Liang Chen,Shiqing Xu
Ferroelectric oxide nanocrystals, in combination with the robust coupling of an electric field with crystal structure symmetry, makes such systems agreeable to field-induced crystal structural transformation. The luminescent properties of rare earth ions are sensitive to the symmetry of the surrounding crystal field. The luminescence tuning of rare earth ions is an important assignment in the research of luminescent materials. However, the current conditional feasibility and reversibility in the exploration of luminescence modification remain major challenges. In this article, the luminescence modulation of rare earth ions has been developed in Yb 3+ /Er 3+ codoped ferroelectrics glass ceramics containing Bi 4 Ti 3 O 12 nanocrystals through an electric field. The inclusion of nanocrystals in the glass matrix greatly enhances the electrical resistance. Both upconversion and near-infrared emissions of rare earth ions are effectively enhanced more than twice via polarization engineering. The electric field regulates the photonic properties of rare earth ions with excellent reversibility and nonvolatility in ferroelectrics. The effective modification by electric field provides a new scheme for optical storage and optoelectronic devices.
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
Journal of Materials Chemistry C
·
2018
·Vol. 6
·期 46
·12631-12637
·
IF 5.976
Kang Yuan,Xinghua Zhang,Ruohan Qin,Xuefeng Ji,Yahui Cheng,Lanlan Li,Xiaojing Yang,Zunming Lu,Hui Liu
Controlling surface states using different functional groups is an effective and facile way to modulate the fluorescence of carbon dots (CDs), but the underlying mechanisms are still unclear and urgent to solve. In this work, we synthesized red emitting CDs and achieved multiple emission states (red, green and blue emission) by tailoring the surface states with different amino groups. In particular, the luminescence mechanism and the role of surface states were studied in detail. It is found that the multiple emission states are related to the speciation of nitrogen (pyridinic N, pyrrolic N, graphitic N and amino N) on the surface of CDs, of which the fluorophore formed by the deformation of p-phenylenediamine contributes to the red emission, pyridinic N is responsible for the green emission state, and pyrrolic N enhances the blue emission. A possible energy level diagram was proposed to disclose the electron transition process and relative levels induced by different surface groups on CDs. In addition, the modulated CDs with multiple emission states can be used as single light converters to fabricate a white light-emitting diode, which has white light color coordinates of (0.31, 0.32), a high color rendering index (CRI) of 85, a luminous efficiency of 8.8 lm W−1 and good stability.
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
JOURNAL OF MATERIALS RESEARCH
·
2024
·Vol. 39
·期 14
·1989-1998
·
IF 2.7
Li Xin,He Yu,Guo Yangyang,Mao Huibing,Chen Ye,Wang Jiqing,Fang Weifeng
With the excitation of a 978 nm laser, upconversion emission of the NaMgF 3 : Tm 3+ , Yb 3+ , Mn 2+ submicron particles include two red emission bands located at 648 and 698 nm and a green emission at about 510 nm in the visible range. The experimental results confirm that the Mn 2+ ions play the key role in the emission modulation between the 648 nm and 698 nm. The incident laser power dependence confirms that the emission at 648 nm is completely different from the emissions at 698 nm, and more than 3 photons are involved in the emission at 648 nm. With the doping of Mn 2+ ions, the intensity ratio R 1 / R 2 of the emission at 648 nm and 698 nm increases first, and decreases for the Mn 2+ concentration larger than 2%. The incident laser power and laser pulse-width also have evident modulation effect of the UC emissions. All the Mn 2+ related phenomena are due to the energy transfer paths ET5 and ET6 between the Tm 3+ and Mn 2+ ions. Graphical abstract
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Anjie Wang,Anjun Huang,Heping Zhao,Yue Liu,Yuxia Luo,Dacheng Zhou,Zhiguo Song,Jianbei Qiu,Cherkasova Tatiana,Zhengwen Yang
Transparent glass is a promising candidate for optical storage media due to its large capacity and high stability advantages. Previously reported optical storage glass systems meet various problems, such as high manufacturing costs, low security levels, etc. Herein, a kind of copper-contained borate glass was designed and fabricated, emitting tunable broadband upon various ultraviolet light excitations. By alternating 360 nm laser (10.7 W/cm 2 ) irradiation for 15 s and thermal treatment at 400 ℃ for 2 h, the emission intensity of the glass can be reversibly regulated, which is associated with the variation of oxidation states of the copper element. Relying on their efficient reversible luminescence modulation behaviors, the potential application of this glass as an optical storage and encryption media is developed, exhibiting the high performances of repeatable writing and erasing, dual mode readout, high-level safety, and good writing resolution for the Cu-doped borate glass.
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
LIQUID CRYSTALS
·
2020
·
IF 2.908
Weiwei Tie,Surjya Sarathi Bhattacharyya,Zhi Zheng,Kyung Jun Cho,Tae Hyung Kim,Young Jin Lim,Seung Hee Lee
To develop stable polymer films which had high orientational ordering of carbon nanotube for polarization-dependent light modulator, we present a new concept for electric-field induced alignment of mesogenic carbon nanotubes (m-CNTs) in reactive mesogen host (RMS) fixed by ultraviolet (UV) polymerization. Covalent modification of m-CNTs was performed using structure-tailored mesogenic units [4-(6-hydroxyhexanolxy)-4’-carbonitrile, PCNOH] in esterification reaction based on 100–500 nm long CNTs shortened by acid oxidation cutting, confirmed through 1H NMR, FT-IR, Raman and XPS spectroscopy. Dynamic orientation of m-CNTs in soft m-CNT/RMS composite without aggregates was observed on a large scale by polarized optical microscopy, in which m-CNTs aligns along the electric field direction. It was reasonable the mesogenic segments introduced onto m-CNTs weakened van der walls interactions between the nanotubes by increasing steric repulsion, and then effectively improved the favourable affinity of m-CNTs with RMS molecules. Direct UV-induced polymerization of RMS molecules stabilized the orientational ordering of m-CNTs confirmed by Raman spectroscopy, and the obtained film also exhibited anisotropic light absorption depending on the polarization direction of an incident light. The facile methodology described in this study to generate oriented films of m-CNTs-in-RMS broadened the scope of potential applications of modulator devices and versatile functional composites with anisotropic physical properties.
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
Journal of Materials Chemistry C
·
2019
·Vol. 7
·期 16
·4667-4672
·
IF 6.641
Shuxiang Ding,Chunxue Wang,Xiaoyu Shi,Jiawei Zou,Qiuli Cheng,Jiufu Zhu,Zuosen Shi,Zhenzhen Cai,Changming Chen,Zhanchen Cui
A series of acrylate group terminated fluorinated polycarbonates containing 4,4-cyclohexylidenebis phenol (BPZ) (AF-Z-PC MAs) or dodecyl chains (AF-Ali-PC MAs) were synthesized. These polymers were further doped with chromophores and crosslinked under a UV lamp. With these doped polymers as the functional layer, we successfully obtained straight and Y structure waveguides by a direct writing method for electro-optical modulator devices. These cross-linked polymers displayed good thermal stability, low optical loss and a high refractive index. In addition, after polarization, the electrooptic coefficients r33 of the doped films were 10 pm V−1 and 9 pm V−1, measured by the Teng–Man method, respectively. The results showed that the direct writing method was a simple and effective way to fabricate Mach–Zehnder structure waveguides and these new macroacrylate terminated polycarbonates had great potential in the application of electro-optical modulator devices.
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
ECS Journal of Solid State Science and Technology
·
2021
·Vol. 10
·期 10
·106011
·
IF 2.07
Jie Yang,Bo Ruan,Wang Ni,Lung-Chang Tsai,Ning Ma,Dean Shi,Tao Jiang,Fang-Chang Tsai
Carbon dots (CDs) has been widely applied in LED diodes, sensing and bioimaging. However, the fluorescence property of CDs is limited because of the solid-state aggregation-caused quenching (ACQ). Metal-organic frameworks (MOFs), due to their high surface area, porosity and tunable pore size, are considered suitable hosts to inhibit the ACQ of CDs. Herein, the Zr-MOFs (UiO-66-(OH)2) is chosen as a host to encapsulate CDs. The dual-emitting CDs@MOFs system is constructed, which overcomes the problem of solid-state aggregation-caused quenching of carbon dots to gain the blue-emitting CDs@UiO-66-(OH)2. With the volume of CDs increased, the fluorescence of CDs@UiO-66-(OH)2 has changed simultaneously. When the volume reaches 3 ml, CDs@UiO-66-(OH)2 begin to cause fluorescence quenching. The correlated color temperatures (CCT) of CDs@UiO-66-(OH)2 are transformed from cold light to warm light. That can be further researched in electroluminescent diodes, ion-sensor, environmental monitoring, biological imaging and developments in other related biochemical fields.
研究领域:
材料科学
·
生物成像
·
传感技术
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Haichang Fu,Yixiao Tang,Feng Zhan,Ling Zhang,Wang Zhan,Yujie Dong,Weijun Li,Cheng Zhang
Smart electrochromic (EC) glasses with visible light modulation have attracted considerable attention due to their unique advantages, but EC sunglasses with anti-blue-ray function have not yet been reported. Herein, a series of wide-bandgap electrochromic conjugated polymers P2–P4 based on 3,4-propylenedioxythiophene (ProDOT) and naphthalene units were designed and synthesized using direct arylation polymerization. Among them, polymers P2 exhibit a satisfactory yellow hue and outstanding overall electrochromic performances. By tuning the intramolecular torsion between ProDOT and naphthalene units in the polymer structure, the absorption spectra of polymers P3 were entirely shifted to the high-energy violet-blue spectra region relative to the anti-blue-ray function. New dual conjugated polymer electrochromic devices based on P3 and black-to-transmissive electrochromic polymer were fabricated, which exhibited the fast transformation between black and anti-blue-ray transmissive color with a switching time of < 5.0 s, high contrast of 49% at 400–700 nm and a high coloring efficiency of 470.8 cm 2 /C. Moreover, an EC prototype sunglasses device with an anti-blue-ray function was fabricated to demonstrate the practical suitability based on the dual conjugated polymer ECDs. This work contributes to the application of EC technology to the smart glasses field.
研究领域:
材料科学
·
光学工程
·
高分子化学
✓ 已验证
DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2022
·
IF 8.008
Jia-Yang He,Hui-Lin Deng,Xin Shang,Chun-Li Yang,Si-Yu Zuo,Ruo Yuan,Hong-Yan Liu,Wen-Ju Xu
It is intriguing to modulate the fluorescence emission of DNA-scaffolded silver nanoclusters (AgNCs) via confined strand displacement and transient concatenate ligation for amplifiable biosensing of a DNA segment related to SARS-CoV-2 (s2DNA). Herein, three stem-loop structural hairpins for signaling, recognizing, and assisting are designed to assemble a variant three-way DNA device (3WDD) with the aid of two linkers, in which orange-emitting AgNC (oAgNC) is stably clustered and populated in the closed loop of a hairpin reporter. The presence of s2DNA initiates the toehold-mediated strand displacement that is confined in this 3WDD for repeatable recycling amplification, outputting numerous hybrid DNA-duplex conformers that are implemented for a transient “head–tail–head” tandem ligation one by one. As a result, the oAgNC-hosted hairpin loops are quickly opened in loose coil motifs, bringing a significant fluorescence decay of multiple clusters dependent on s2DNA. Demonstrations and understanding of the tunable spectral performance of a hairpin loop-wrapped AgNC via switching 3WDD conformation would be highly beneficial to open a new avenue for applicable biosensing, bioanalysis, or clinical diagnostics.
研究领域:
生物传感
·
分子诊断
·
纳米生物学
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）