Journal of Physical Chemistry C
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2021
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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
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材料科学
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DOI
高影响因子
DALTON TRANSACTIONS
·
2021
·Vol. 50
·期 29
·10033-10040
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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
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光学工程
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DOI
PubMed
高影响因子
OPTICS EXPRESS
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2025
·Vol. 33
·期 9
·18686-18697
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IF 3.3
Shiqing Zhao,Shiqing Zhao,Shiqing Zhao,Xinhao Shi,Luhui Feng,Jiarui Chen,Xinli Cheng,Xinli Cheng,Cheng Zhang,Cheng Zhang,Yanhua Liu,Yanhua Liu
Electrochromic devices (ECDs) that realize active transmittance or reflectance modulation under reversible electrical stimuli have triggered intense research interest and consequently plenty of practical applications. However, the majority of inorganic electrochromic materials have limited color switching versatility. To solve the drawbacks, we introduce a WO3-based ECD integrated with a thin-film resonance cavity composed of reflection (metallic tungsten, W), dielectric (WO3), and air layers, which endows the device with outstanding color modulability across the full visible spectrum region. By adjusting the thickness of WO3 (113 - 236 nm) film and its refractive index (n) and extinction coefficient (k) through applying electrical bias ranging from -1.5 to 0.5 V, the ECDs exhibit abundant vivid colors, including yellow, green, blue, and magenta, etc. The strategy of thin-film resonance cavity brings improved electrochromic properties in terms of fast response (3.3 s for coloration and 2.9 s for bleaching), high coloration efficiency (75.3 cm2 C−1), long chemical stability (1000 cycles retaining 81% of optical modulation), and remarkable spectrum peak migration (∼181 nm). More importantly, a polyethylene terephthalate (PET) substrate was introduced in the devices to demonstrate the suitability for flexible ECDs, which can accelerate the development of flexible colorful displays in the future.
研究领域:
材料科学
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光学
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纳米技术
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电化学
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显示技术
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产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2023
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IF 8.4
Renjun Si,Yan Li,Jie Tian,Changshu Tan,Shaofeng Chen,Ming Lei,Xin Guo,Shunping Zhang
Temperature modulation technology has been extensively used in metal oxide semiconductor (MOS) gas sensors, especially based on micro-hotplate sensor structure. The technique not only enhances the selectivity but also increases the sensor’s sensitivity by allowing it to exhibit a highly active surface due to the effect of oxygen accumulation. However, when the MOS sensor is in a state of high surface activity, the corresponding hydroxide formation may occur when exposed to water, negatively affecting the gas sensing performance and stability of the sensor. This study focuses on the stability of SnO 2 and In 2 O 3 gas sensors during storage process after temperature modulation test. The results indicate that SnO 2 exhibits good stability, while In 2 O 3 stability is poor. The mechanism responsible for deactivation was discussed with infrared spectroscopy results. The formation of In(OH) 3 was confirmed by high resolution transmission electron microscope , which further confirmed the above conclusion. These findings suggest that after temperature modulation, the gas sensitive materials stored in an atmospheric environment (20 ℃, 40%−60%RH) would generate hydroxides. When temperature modulation was repeated at (100–400 ℃), Sn(OH) 4 decompose into SnO 2 , thus maintaining stability. In contrast, the decomposition temperature of In(OH) 3 is higher. At 400 ℃, it will not decompose into In 2 O 3 in a short time, which would lead to poor stability.
研究领域:
材料科学
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传感器技术
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DOI
高影响因子
Journal of Materials Chemistry C
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2020
·Vol. 8
·期 25
·8538-8545
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IF 7.059
Mingyang Li,Dongqing Liu,Haifeng Cheng,Liang Peng,Mei Zu
Dynamic modulation of thermal radiation has emerged as an important field of research in recent years, and it has shown a wide range of potential applications in energy-efficient buildings, personal thermal management, adaptive camouflage and spacecraft thermoregulation. Herein, inspired by the unique optical properties of metals and the excellent optical and electrical properties of graphene, we develop dynamic infrared (IR)-modulation devices by reversibly electrodepositing metals on graphene-based electrodes. The as-prepared graphene-based electrodes show high IR transparency and acceptable sheet resistance on the O2 plasma-treated polypropylene (PP) films and the zinc oxide (ZnO)-modified barium fluoride (BaF2) substrates, satisfying the basic requirements of achieving dynamic IR modulation in reversible metal electrodeposition (RME) systems. Moreover, by assembling the two types of graphene-based IR-transparent electrodes into a two-electrode RME system and after electrodepositing for tens of seconds, both of the two devices exhibit substantial apparent temperature declines, indicating their potential IR modulation capabilities. Finally, we believe that incorporating IR-transparent graphene-based electrodes into RME systems may provide a possible dynamic IR-modulation approach for inspiring and bettering many thermal radiation management-related technologies.
研究领域:
材料科学
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纳米技术
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光学工程
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能源材料
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电子器件
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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IF 5.8
Bing Wang,Yao Liu,Zhuo Li,Hong Hao,YuZhen Zhao,ZeMin He,WenQi Song,EnZhou Liu,Bo Zhou,XiaoXun Ma,Zongcheng Miao
Leveraging the synergistic combination of dipole modulation and localized surface plasmon resonance effects (LSPR) effects offers a promising solution to address the low carrier separation efficiency observed at traditional Type-III heterojunction interfaces. Herein, a derivative of SubPc-4 with a high dipole moment of 7.25 Debye was successfully synthesized by introducing carbonyl functional groups axially into the parent subphthalocyanine. Silver metal was introduced during the preparation of Ag 3 PO 4 through light irradiation, and the organic supramolecule SubPc-4 self-assembled on the Ag 3 PO 4 semiconductor surface via van der Waals forces and π-π stacking interactions, forming a binary heterojunction SubPc-4/Ag 3 PO 4 with LSPR effects. Under 30 minutes of visible light irradiation, the degradation efficiencies of tetracycline and oxytetracycline by the SubPc-4/Ag 3 PO 4 supramolecular nanoarray were 88.29% and 90.20%, respectively. DFT and TDDFT calculations, combined with experimental characterization data, indicate that the LSPR supramolecular array exhibits excellent activity and stability, primarily attributed to the improved carrier separation capability at the SubPc-4/Ag 3 PO 4 interface. This work highlights the potential of combining dipole modulation and LSPR technology to enhance the performance of Type-III heterojunction photocatalysts.
研究领域:
材料科学
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环境科学
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化学
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DOI
高影响因子
ENVIRONMENTAL RESEARCH
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2021
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IF 6.498
Lin Hu,Dong Mao,Liu-han Yang,Ming-sheng Zhu,Zheng-hao Fei,Shi-xin Sun,Dong Fang
Enhancing photocatalytic performance via electronic modulation have attracted much attention for synergetic photocatalytic degradation of antibiotic pollutant. In this study, a new hetero-structured system is raised, which comprises In 2 S 3 coupled to In-MOF and operates as an efficient photocatalyst for RhB degradation. The formation of hetero-structure and occurred electron modulation of In 2 S 3 /In-MOF hybrid was confirmed by relevant characterizations. Surprisingly, the In 2 S 3 /In-MOF hybrid represented enhanced photocatalytic ability over In-MOF. The photocatalysis of Rhodamine B in presence of In 2 S 3 /In-MOF hybrid has achieved 92.2 % degradation.
研究领域:
材料科学
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环境科学
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DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2023
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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
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光学工程
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DOI
高影响因子
DYES AND PIGMENTS
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2022
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IF 5.122
Peiyu Tan,Feifei Lu,Yuge Han
A dual-layer structure combining the properties of two polymers is demonstrated to be efficient in strengthening the mid-to-far infrared modulation. Prior to the assembly of bilayer devices, the infrared adjustment capability of single-layer devices poly(3,4-ethylenedioxythiophene) ( PEDOT )、poly(pyrrole) ( PPY ) and poly(aniline) ( PANI ) with different polymerization charges is scrutinized. The results exhibit that the optimal polymerization charge affording the highest reflectance variation is inconsistent between the mid-wavelength and long-wavelength bands in PEDOT and PPY devices. However, through the arrangement of deposition sequence and relative thickness of PEDOT and PPY coatings, a device with the reflectance contrast of 0.662 in the mid-wavelength and 0.281 in the long-wavelength bands was obtained utilizing a bilayer film PEDOT-0.2C/PPY-0.3C . Further FTIR and UV–Vis spectra show that the bilayer films are successfully formed and both polymers play a role in the electrochemical process . Different morphologies of bilayer films with reverse positions observed by SEM images account for the correlation between the infrared regulation performance and deposition sequence.
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
DESALINATION
·
2022
·
IF 11.211
Xiumin Zhang,Yongping Dong,Qingyi Wang,Hang Yu,Congjie Gao,Lixin Xue
Structures and NF performance of TFC-Co and TFC membranes activated with 50 % alcohol solutions were studied. Methanol and glycol solution activation increased water flux 2–4 times without trading off salt rejection while glycerin solution activation increased water flux 3–4 times with reduced salt rejection and increased dye/salt retention selectivity . The Stokes radius of TFC-Co membrane changed from 0.77 nm to 0.66, 0.78 and 0.92 nm while the TFC membrane changed from 0.54 nm to 0.55, 0.65 and 0.70 nm after activation with methanol, glycol and glycerin solutions, respectively. Capillary pore filling models were developed from pure alcohol absorption experiments including the stages of initial pore filling, pore expansion, pore relaxation and pore adjustment, while most Stokes radius after 50 % solutions activation were found to be close to the relaxed pore radius values (r rx ) or half of the expanded pore radius values (r ex ) from pure alcohol absorption experiments.
研究领域:
材料科学
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环境工程
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产品关联
DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2024
·
IF 6.7
Ang Li,Jian Sun,Haoqiang Yan,Dayu Li,Wei Xu
In miniature ion trap mass spectrometry, achieving a balance between isolation resolution and efficiency is a formidable challenge. The presence of absorption curves causes target ions to inadvertently absorb energy from AC signal components near their resonant frequencies. To mitigate this issue, SAM–SFM waveforms introduce a parameter known as the decreasing factor. Unlike SWIFT waveforms, SAM–SFM’s spectral profile intentionally departs from a rectangular window, adopting an arch-shaped excitation window to minimize the impact on target ions and improve ion isolation efficiency. SAM–SFM waveforms have the advantage of low computational complexity, enabling real-time computation using an embedded FPGA technology. Regardless of any parameter changes, the FPGA can consistently guarantee waveform output within 1 μs. This not only enhances throughput but also eliminates the need for a PC in miniature mass spectrometry devices. The performance of SAM–SFM has been validated on an improved “Brick” miniature ion trap mass spectrometer. Comparative experiments with SWIFT waveforms confirm the lossless unit-mass isolation capabilities of SAM–SFM. This waveform has the capability to simultaneously isolate multiple target ions, even allowing for the lossless isolation of ions with lower abundance within isotopic clusters, albeit at the cost of requiring extended isolation durations.
研究领域:
分析化学
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质谱技术
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仪器科学与技术
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DOI
PubMed
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
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