Small Methods
·
2025
·
IF 9.1
Jinrui Li,Huiyan Xie,Di Sun,Hongguang Li,Xia Xin
Exploring potential third-order nonlinear optical (NLO) materials attracts ever-increasing attention. Given that the atomically precise and rich adjustable structural features of silver nanoclusters (Ag NCs), as well as the unique π-electron conjugated system of carbon-based nanomaterials, a supramolecular co-assembly amplification strategy to enhance the luminescent intensity and NLO performance of the hybrids of the two components, are constructed and the relationship between structures and optical properties are investigated. By combining water soluble Ag NCs [(NH 4 ) 6 [Ag 6 (mna) 6 ] (H 2 mna = 2-mercaptonicotinic acid, abbreviated to Ag 6 ─NCs hereafter) containing uncoordinated carboxyl groups with water-soluble fullerene derivatives modified with multiple hydroxyl groups (fullerenols, C 60 ─OH), the π-electron delocalization is expanded owing to non-covalent hydrogen bonding effect between Ag6─NCs and C 60 ─OH, which provides a feasible basis for realizing the NLO response. Then, the co-assemblies are doped into a PMMA matrix to prepare composite film and its NLO properties are evaluated by Z-scan technique. Remarkably, the effective nonlinear absorption coefficients β is of two orders magnitude higher than those of the Ag 6 ─NCs assemblies at the absence of C 60 ─OH. This work showcases a new approach for amplifying NLO responses which greatly facilitates the development of integrated photonic devices.
研究领域:
材料科学
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光学
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产品关联
DOI
PubMed
高影响因子
Advanced Optical Materials
·
2016
·Vol. 4
·期 11
·1732-1737
·
IF 5.359
Wen-Gao Lu,Cheng Chen,Dengbao Han,Linhua Yao,Junbo Han,Haizheng Zhong,Yongtian Wang
Graphical The comparison between organic–inorganic CH 3 NH 3 PbBr 3 quantum dots and all inorganic halide perovskite CsPbBr 3 quantum dots allows to understand the structural difference and corresponding optical properties. Using Z-scan measurements, it is revealed that colloidal CH 3 NH 3 PbBr 3 exhibits enhanced two-photon absorption properties compared to those of CsPbBr 3 quantum dots due to their structural difference.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2016
·
IF 3.014
Congfei Yin,Weibin Fan,Weidong Xiang,Guangcai Hu,Xie Hu,Xipeng Chen,Pengzhi Li,Xiaojuan Liang
In this work, poly-crystalline CaCuO 2 /CaCu 2 O 3 thin films were deposited on quartz substrates using radio frequency (RF) magnetron sputtering and subsequent annealing. The deposition process was performed at room temperature under an oxygen partial pressure of 4 × 10 −2 Pa at a speed of 2 Å/s. The crystalline structure, distribution of the particles and size of the elements of the as-prepared and CaCuO 2 /CaCu 2 O 3 thin films were individually acquired and discussed in detail. Subsequent annealing was found to modify the composition, structure and morphological characteristics of the as-prepared thin film, resulting in changes of the film quality and, thereby, improving the nonlinear optical (NLO) response of the film. The sign and magnitude of third-order nonlinear susceptibility χ (3) of the as-prepared and CaCuO 2 /CaCu 2 O 3 thin films were determined using the top-hat Z-scan technique performed at 532 nm with a laser duration of 190 fs. The results show that annealed CaCuO 2 /CaCu 2 O 3 thin film exhibits a fast NLO response with a third-order nonlinear susceptibility χ (3) of 1.1 × 10 −12 esu, which is higher than that of the as-prepared thin film. The results indicate that CaCuO 2 /CaCu 2 O 3 thin films have potential applications in nonlinear optics.
研究领域:
材料科学
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光学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Muhammad Sohail,Xiong Shen,Intikhab Alam,Zulfiqar Ali,Nimra Razzaq,Qiuyun Ouyang
The investigation of nonlinear optical (NLO) properties is crucial for the effective application of CsPbI3/TiO2 nanocomposites in NLO devices. The CsPbI3/TiO2 nanocomposites were synthesized by a hot injection method. Then, the CsPbI3/TiO2 nanocomposites were poured into methyl methacrylate via polymerization to fabricate CsPbI3/TiO2/PMMA organic glasses (OGs). The crystal structure and size morphology of the CsPbI3/TiO2 nanocomposites were examined using X-ray diffraction (XRD) and transmission electron microscopy (TEM), respectively. The nonlinear absorption (NLA), nonlinear refraction (NLR), and optical limiting (OL) properties of the CsPbI3/TiO2/PMMA OGs were investigated by using the Z-scan technique, employing a nanosecond pulse laser operating at a wavelength of 532 nm. The CsPbI3/PMMA and CsPbI3/TiO2/PMMA OGs can be transferred from saturable absorption (SA) to reverse saturable absorption (RSA) by varying the incident energy. In addition, the CsPbI3/TiO2/PMMA OGs exhibit superior NLA, NLR, and OL performances compared to the CsPbI3/PMMA OG and other halide-based perovskites. The enhanced nonlinear optical (NLO) properties of CsPbI3/TiO2/PMMA OGs can be ascribed to the cooperative interaction between CsPbI3 and TiO2. In summary, the results indicate that CsPbI3/TiO2 nanocomposites possess substantial potential for applications in NLO devices such as optical limiters, optical switches, and optical modulators.
研究领域:
材料科学
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光学工程
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
·
2019
·Vol. 9
·期 7
·957
·
IF 4.034
Pengchao Li,Baohua Zhu,Peng Li,Zhihao Zhang,Luyao Li,Yuzong Gu
CdSe-reduced graphene oxide (CdSe/RGO) composites were synthesized by a hydrothermal method. CdSe/RGO composites with different mass ratios were prepared. The structure and morphology of CdSe/RGO composites were analyzed by X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The synthesis of CdSe/RGO complexes was successfully demonstrated by Fourier infrared (FT-IR) and Raman spectra. CdSe nanoparticles in the CdSe/RGO composite were uniformly dispersed on the graphene surface. The study found that oxygen-containing functional groups such as hydroxyl (-OH) and carboxyl (-COOH) groups in graphene played a decisive role in the dispersion of CdSe. The third-order nonlinear optical properties of CdSe/RGO composites were measured by a single beam Z-scan technique. The experimental results showed that composites exhibited two-photon absorption and self-focusing nonlinear refraction properties. Additionally, the third-order nonlinear susceptibility of the composite material was obviously enhanced, which was mainly due to the good dispersion of CdSe nanoparticles on graphene.Keywords:CdSe/RGO nanocomposites;carboxyl groups;third-order nonlinear optical property;Z-scan technique;good dispersion
研究领域:
材料科学
·
光学
✓ 已验证
DOI
PubMed
高影响因子
MATERIALS CHARACTERIZATION
·
2017
·
IF 2.714
Congfei Yin,Xiaojuan Liang,Guangcai Hu,Xie Hu,Xipeng Chen,Pengzhi Li,Weidong Xiang
The titanate , is a material of interest for various energy applications, including photovoltaics , catalysts, and high-rate energy storage devices. Herein, its related materials, CuO/CaTi 4 O 9 [CCTO] thin films , were successfully fabricated on SrTiO 3 (100) substrates by RF magnetron sputtering assisted with subsequent oxygen annealing. This obtained CCTO thin films were then systemically studied by X-ray powder diffraction (XRD), atomic force microscopy (AFM), scan electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and high-resolution transmission electron microscopy (HRTEM). It was found that CuO and CaTi 4 O 9 (001) particles were closely accumulated together on the surface of the substrate in the annealing process after comparing with that of the as-prepared thin film, which was verified by SEM and AFM results. Furthermore, we investigated the third-order nonlinear optical (NLO) properties of the as-prepared and annealed CCTO thin film by means of the Z-scan technique using 650 nm femtosecond laser pulse. Post-deposition oxygen annealing was found to modify the morphological characteristics of the films, resulting in enhancing their NLO properties. The observation of NLO performance of annealed CCTO thin film indicates that RF magnetron sputtering is a feasible method for the fabrication of optical thin films, which can be expanded to fabricate other NLO materials from the corresponding dispersions. Naturally, we concluded that the CCTO thin film occupy a better NLO property, and thus enlarge its application in nonlinear optics .
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2014
·
IF 2.726
Chenglong Zhang,Weidong Xiang,Hongyan Luo,Haitao Liu,Xiaojuan Liang,Xin Ma,Lang Pei,Zhaoping Chen,Jinsong Li,Haihong Gao,Li Ma
Lead-nanoparticles-doped Na 2 O–B 2 O 3 –SiO 2 (NBS) glass was prepared by sol–gel and atmosphere control methods. The formation mechanism and the microstructure of the specimens were investigated by differential thermal analysis and thermal gravimeter, X-ray diffraction, transmission electron microscopy, selected area electron diffraction, energy dispersive X-ray spectroscopy, and nitrogen adsorption measurements, respectively. The linear and nonlinear optical properties of the glass were analyzed by UV/VIS/NIR spectrophotometry and Z -scan technology. The results showed that the Pb nanoparticles in spherical shape with the average particle size about 18.9 nm belong to cubic crystal system and have good crystallinity and dispersibility in the glass matrix as well as exhibit excellent nonlinear optical properties. The specimen has a high linear optical transmittance, and little absorption peaks appear in the examined wavelength range. The third-order optical nonlinear parameters calculated are γ of 1.67 × 10 −16 m 2 /W, β of 7.02 × 10 −11 m/W, and χ (3) of 2.61 × 10 −17 m 2 /W 2 .
研究领域:
材料科学
·
光学
·
纳米技术
✓ 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）