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
·
光学
✓ 已验证
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 Materials Chemistry C
·
2016
·Vol. 4
·期 36
·8490-8495
·
IF 5.066
Liang Bai,Shi Qiao,Yu Fang,Jianguo Tian,J. Mcleod,Yinglin Song,Hui Huang,Yang Liu,Zhenhui Kang
We quantitatively investigate the nonlinear optical (NLO) property of carbon nanodots (CNDs, less than 10 nm) by the Z-scan technique using a tunable 532 nm nanosecond laser system. These CNDs were fabricated by an electrochemical etching method from graphite rods. Our results suggested that the third-order nonlinear susceptibility χ(3) of CNDs is strongly dependent on the diameter of the CNDs apparently; the nonlinear refractive index γ decreased as the size of CNDs decreased, while the nonlinear absorption coefficient β showed an opposite tendency to γ. We further demonstrated that the carboxyl group on the CND surface plays a key role and has significant impact on the third-order nonlinear susceptibility χ(3).
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
JOURNAL OF PORPHYRINS AND PHTHALOCYANINES
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2018
·
IF 1.217
Xiaoyu Ren,Haizhou Ren,Yunshan Zhou,Lijuan Zhang,Farooq K. Shehzad,Chao Li
New inorganic-organic transparent composite films of the formula (Zn 2 Al-LDH/ZnTPPS) n were fabricated using exfoliated cationic Zn 2 Al layered double hydroxide (Zn 2 Al-LDH) nanosheets and anionic meso -tertra(4-sulfophenyl) zinc porphyrin (ZnTPPS) through an electrostatic layerbylayer self-assembly method. The resulting composite films were characterized by UV-vis spectroscopy (UV-vis) scanning electron microscopy (SEM) and atomic force microscopy (AFM). The results showed that the films have relatively smooth and orderly surfaces, with the large ring plane of the porphyrin molecules vertically aligned LDH nanosheets and can grow in a nearly linear fashion with increasing the deposition cycles. Z-scan measurements, which were conducted under laser irradiation at a wavelength of 532 nm pulse width of 6 ns, repetition rate of 10 Hz and light intensity at focus E of 10 μ J, revealed that the composite films have notable saturation absorption ( cf. , ZnTPPS in solution shows reverse saturation) and optical nonlinear self-defocusing behavior with the nonlinear optical absorption coefficient β refractive index n 2 , and third-order NLO susceptibility χ (3) of the films increasing with the increase in number of layers of films ( χ (3) value is up to 7.86 × 10 -11 esu when n = 40), implying the NLO responses could be modified by fine tuning the thickness of composite films.
研究领域:
材料科学
·
光学
✓ 已验证
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
·
光学
✓ 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
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
JOURNAL OF PHYSICS D-APPLIED PHYSICS
·
2022
·Vol. 55
·期 42
·424005
·
IF 3.409
Chang Wang,Ran Duan,Xingcheng Xiao,Yingwei Wang,Zhihui Chen,Yejun Li,Si Xiao,Jun He
Long hexagonal Co3(PO4)2·4H2O nanosheets were synthesized using a hydrothermal method, where their nonlinearity was probed via a femtosecond Z-scan system. The results show that the Co3(PO4)2·4H2O nanosheets exhibit saturable absorption when the incident photon energy is greater than the forbidden band width, while optical limiting is found when the incident photon energy is smaller than the forbidden band width. In particular, the obtained Co3(PO4)2·4H2O nanosheets demonstrate the best optical limiting properties at 600 nm. The present study suggests the cobalt phosphates nanosheets as a promising candidate for optical limiters.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
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
Nanoscale Advances
·
2021
·Vol. 3
·期 12
·3481-3490
·
IF 4.553
Xueyi Guo,Sheng Liu,Weijia Wang,Chongyao Li,Ying Yang,Qinghua Tian,Yong Liu
Recombination centers generated from structural and interfacial defects in nanoheterostructures (NHs) prevent effective photo-induced charge transfer and have blocked the advance of many photoresponsive applications. Strategies to construct high-quality interfaces in NHs are emerging but are limited in the release of interfacial strain and the integrality of the sublattice. Herein, we synthesize single-particulate Cu1.94S–ZnS NHs with a continuous sublattice using a nanoscale cation exchange reaction (CE). Under near-infrared (NIR) radiation (λ = 1500 nm), femtosecond open-aperture (OA) Z-scan measurements are applied to investigate the nonlinear optical features of samples and verify the existence of plasma-induced charge transfer in the Cu1.94S–ZnS NHs system. The resulting charge transfer time (τCT) of ∼0.091 picoseconds (ps) was confirmed by the femtosecond time-resolved pump–probe technique. Such an ultrafast charge transfer process has been rarely reported in semiconductor–semiconductor NHs. The results suggest that CE can be used as a promising tool to construct well-ordered interfacial structures, which are significant for the performance enhancement of NHs for photon utilization.
研究领域:
材料科学
·
纳米技术
·
光电子学
·
光子学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
·
2022
·Vol. 259
·期 7
·2100543
·
IF 1.782
Jing Zhang,Yuqing Cao,Chen Chen,Qiang Wang,Yabin Shao
2D black phosphorus nanosheets (BPNSs) are prepared by the ultrasonic-assisted liquid phase stripping method, which improves the preparation yield and monodispersity of the thin-layer BPNSs. Open-aperture Z-scan measurement by nanosecond pulsed laser with low repetition rate (10 Hz) is used to reduce the existence and accumulation of heat accumulation effect. BPNSs have strong saturated absorption in the wideband visible light range from 475 to 625 nm; and with the increase of laser energy, reverse saturated absorption (RSA) occurs at some specific wavelengths in this range. The reverse saturation absorption is observed at 500 nm; and the stronger the excited state absorption is with the increase of laser energy, the more obvious the reverse saturation absorption is. At 525 nm, as the laser excitation energy increases from 750 to 1080 μJ, a transition from saturated absorption to anti-saturated absorption is observed. This shows that laser excitation energy is an important factor in the transition from saturated absorption to anti-saturated absorption. That is to say, by controlling the laser excitation energy and wavelength, BPNSs can have different application values in the field of nonlinear optics, such as saturable absorbers, optical limiters, and optical switches.
研究领域:
材料科学
·
光学
·
纳米技术
·
光子学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）