Materials
·
2024
·Vol. 17
·期 13
·3079
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IF 3.1
Bo Gao,Xuhui Zhao,Lijiao Yang,Lihe Yan,Tao Lin,Jinhai Si
With the wide application of laser weapons, the requirements of laser protection technology are becoming more and more strict. Therefore, it is important to find ideal optical limiting (OL) materials to protect human eyes and detectors. In this work, the nonlinear optical responses of gold nanoparticles/porous carbon (Au NPs/PC) nanocomposites prepared by the reduction method were studied using the nanosecond Z-scan technique. Compared with porous carbon, the Au NPs/PC nanocomposites show a lower damage threshold, a bigger optical limiting index and a wider absorption spectrum. The interaction between gold nanoparticles and porous carbon enhances the nonlinear scattering effect of suspended bubbles. These results indicate that Au NPs composites have potential applications in the protection of human eyes and detectors.
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
Inorganic Chemistry Frontiers
·
2022
·Vol. 9
·期 17
·4413-4424
·
IF 7.779
Long-Sheng Wang,Yue Wang,Chun-Lin Lv,Chao Guo,Fang-Yuan Xing,Yu-Jia Dong,Zheng Xie,Shu-Yun Zhou,Yong-Ge Wei
In order to tune the intrinsic third-order nonlinear optical (NLO) properties of polyoxometalates (POMs), we adopted a strategy of substituting addenda atoms of POMs to obtain a class of polyoxomolybdovanadates, [TBA]3[VMo5O19] (V1Mo5), [TBA]4[V8Mo2O28]·2CH3CN (V8Mo2) and [TBA]4[HV9MoO28]·2CH3CN (V9Mo1) (TBA = tetrabutylammonium). Their structures were determined by single crystal X-ray diffraction and further characterized by FT-IR, Raman, UV-vis, diffuse reflection, HR MS, XPS, ICP-MS, CHN analysis and so on. The Z-scan curves of all compounds in a suspension of propanetriol demonstrate typical nonlinear absorption (NLA) irradiated by a laser at 532 nm and 1064 nm, which can be tuned by the substitution of addenda atoms in POMs. Among those, V9Mo1 possesses the smallest transmittance and largest nonlinear absorption coefficient. V9Mo1-doped organically modified silica (ORMOSIL) gel glasses have NLA and optical limiting (OL) properties that could be tuned by changing the doping concentration of V9Mo1. In particular, V9Mo1 exhibits an unusual superbroadband OL performance in the visible and long-wavelength near-infrared regions (532–2150 nm). To the best of our knowledge, this is the first example of a superbroadband optical limiter based on crystalline metal cluster compounds. Our current work not only provides a series of polyoxomolybdovanadates and V9Mo1-doped gel glasses with tunable third-order NLO properties and superbroadband OL performance but also affords a feasible strategy to tune the third-order NLO properties of POMs via the substitution of addenda atoms.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
Crystals
·
2022
·Vol. 12
·期 9
·1295
·
IF 2.67
Yang Yu,Yuzhen Zhao,Yongsheng Mi,Yang Zhao,Zhun Guo,Huimin Zhang,Dong Wang,Zongcheng Miao
A simple synthetic method was designed, in which the Sonogashira coupling reaction and [2+2] cycloaddition click reaction with high yield were performed on 1-bromopyrene to obtain several novel pyrene derivatives. The structure of each sample was characterized by Nuclear Magnetic Resonance (NMR), Mass Spectrometry (MS), Fourier transform infrared (FTIR) and elemental analysis. The characterization of the products by Ultraviolet-visible (UV-vis) and Photoluminescence (PL) spectroscopy proves that the addition of click groups has an important effect on the optoelectronic properties of pyrene derivatives. The Z-scan technique was used to test the third-order nonlinear optical (NLO) properties of the samples, and it could be found that the NLO properties of the products were improved and the transition of saturable absorption and reverse saturable absorption occurred with the addition of click reagent. These factors indicate that the click-modified pyrene derivatives have potential applications in areas such as optical limiting.
研究领域:
有机化学
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材料科学
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光物理学
✓ 已验证
DOI
高影响因子
DYES AND PIGMENTS
·
2020
·
IF 4.613
Bolong Li,Zengduo Cui,Yuping Han,Jiale Ding,Zhenhua Jiang,Yunhe Zhang
Materials with excellent nonlinear optical (NLO) properties are usually applied in optoelectronics and optical limiting devices. Photoinduced intramolecular electron transfer (PET) and energy transfer (ET) play an important role in enhanced NLO properties. Through axially connected anthraquinone to phthalocyanine, two types of novel lanthanum phthalocyanine (LaPc-Aqn and HLaPc-Aqn) were designed to effectively improve PET/ET process, and thus leading to excellent NLO properties. Hyperbranched phthalocyanines possess enhanced NLO properties owing to their special three-dimensional structures that have more donor–acceptor (D–A) systems in their cell structure than lanthanum phthalocyanines. The uniform polyphenylsulfone composite film(HLaPc-Aqn-PPSU) was prepared by a simple solution casting method according to the “like dissolves like” theory. The values of large third-order nonlinear susceptibility (Im[χ (3) ]) and low limit threshold (I lim ) were 1.51 × 10 −9 esu and 0.015 J/cm 2 , respectively, demonstrating that the film had great optical limiting performance. Such research can contribute to the development of novel phthalocyanine materials for nonlinear optics and optical limiting devices.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
Chemical Science
·
2025
·
IF 7.4
Zihao Guan,Lulu Fu,Lu Chen,Zhiyuan Wei,Fang Liu,Yang Zhao,Zhipeng Huang,Mark G Humphrey,Chi Zhang
The long-chain ligands and weak charge-transport capacity of perovskite nanocrystal (NC) always hinder its optoelectronic applications. Our study proposes an effective strategy to unlock the optimized nonlinear optical (NLO) properties of perovskite via the aromatic ligand-exchange plus porphyrin-axial-coordination. Synthesized porphyrin-pyridine dual-modified CsPbBr3-NC hybrid material, fabricated by 4-(aminomethyl)pyridine (PyMA) and a novel star-shaped zinc-porphyrin trisubstituted triazacoronene compound (ZnPr) modifications, exhibits excellent NLO absorption performance under femtosecond (fs) laser irradiation in the visible to near-infrared range. Specifically, its nonlinear absorption coefficient is 10 times higher than that of the pristine CsPbBr3-NC and it also possesses an outstanding optical limiting (OL) capability with an OL threshold as low as 1.8 mJ cm−2. The modification of PyMA ligands reduces the trap state density on the perovskite surface and promotes the electronic coupling between the NC lattices. With the aid of PyMA coordinating with the Zn atoms in ZnPr, large-size planar porphyrins are anchored on the perovskite surface from the axial position, which may enhance the ligand protection capability and thereby significantly facilitate the charge transport between porphyrin components and perovskite NCs. The above two-step modification synergistically contributes to the prominent NLO performance. Our work affords a new viable paradigm for developing multi-field and high-performance perovskite NC photonic materials and devices.
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
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 21
·10433-10440
·
IF 3.925
Lulu Fu,Yan Fang,Rui Yang,Zihao Guan,Zhiyuan Wei,Naying Shan,Fang Liu,Yang Zhao,Mark G. Humphrey,Chi Zhang
Functional organic–inorganic nanocomposite materials displaying large optical nonlinearities are eagerly required for many advanced optoelectronic applications, such as data storage, optical switching, laser mode-locking, and optical limiting. Herein, a pyrazine-linked porphyrin dimer (1a)-functionalized graphene nanocomposite G-1a was successfully constructed by physical grafting of 1a onto the surface of graphene through π–π stacking. The structure of G-1a was thoroughly characterized by scanning electron microscopy, Fourier transform infrared spectroscopy, Raman spectroscopy, steady-state absorption, and fluorescence analysis. Z-scan studies demonstrate that unprecedented enhancement of reverse saturable absorption (RSA) of porphyrin dimer 1a compared to that of the porphyrin monomer ZnTPP is observed under 12 ns (nanosecond) laser irradiation, which can be ascribed to its large π-conjugated system, longer excited-state lifetime in the ns scale, and reorganized excited states. G-1a exhibits the strongest nonlinear optical (NLO) absorption properties under identical laser conditions when compared to its individual precursors, stemming from a synergistic effect of the strongly enhanced RSA of 1a, the nonlinear scattering of graphene and the effective photoinduced electron/energy transfer from 1a to graphene. These results expand the applications of porphyrin dimers in developing novel NLO-active materials towards ns laser irradiation and reveal that G-1a is a very promising optical limiter candidate. This study provides a new paradigm to develop advanced optoelectronic devices with organic conjugated chromophores.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
Journal of Physical Chemistry C
·
2013
·
IF 4.814
Lili Tao,Bo Zhou,Gongxun Bai,Yonggang Wang,Siu Fung Yu,Shu Ping Lau,Yuen Hong Tsang,Jianquan Yao,Degang Xu
Solid-state graphene oxide (GO) homogeneously incorporated silica gel glasses have been successfully fabricated, and the good nonlinear optical (NLO) response shown indicates its high potential as the optical limiting material to protect optical detectors and human eyes from damage caused by high power lasers. The GO sheets are covalently functionalized with 3-aminopropyltriethoxysilane and connected to the silica glass matrix through Si–O bonding, resulting in an increase in GO incorporation concentration up to 20.2 mol % (C/SiO2) without reaching the saturation limit. Digital images and element mapping analysis of carbon have confirmed the homogeneous dispersion of GO in the silica gel glass. Because of the higher two-photon absorption coefficient, lower NLO starting threshold, and optical limiting threshold shown at 532 nm wavelength, the NLO performance at this wavelength is better than at 1064 nm. At an input fluence as low as 1.3 J cm–2 at 532 nm and 2.3 J cm–2 at 1064 nm, the glass incorporated with 5.1 mol % GO starts to exhibit an NLO response, suggesting its potential as a laser optical limiting absorber. In addition to the discussion of the probable reasons behind the phenomenon, it has been demonstrated for the first time that the NLO performance of GO in solid-state silica gel glass is stronger than in deionized water.
研究领域:
材料科学
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光学工程
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2014
·Vol. 4
·期 91
·50277-50284
·
IF 3.708
Zonghai Shi,Yunshan Zhou,Lijuan Zhang,Cuncun Mu,Haizhou Ren,Daf ul Hassan,Di Yang,Hafiz Muhammad Asif
Three new supramolecular compounds [H2TPP]1.5[SW11VO40]·5CH3CN·4H2O 1, [H2TPP]2[SW10V2O40]·4CH3CN·3H2O 2, and [H2TPP][SW12O40]·4H2O 3 composed of [H2TPP]2+ cation and vanadium substituted Keggin-type polyoxometalate (POM) anion [SW12−nVnO40](2+n)− (n = 0–2) were prepared and characterized. The third-order nonlinear optical (NLO) and optical limiting (OL) properties of resulting hybrids were studied by using an Nd:YAG laser at 532 nm with a pulse duration of τ = 7 ns. The results demonstrate that all of these supramolecular compounds have significant nonlinear reverse saturated absorption, self-defocusing behavior, and good OL performance, especially for compound 1, which has a second hyperpolarizability γ value of 7.05 × 10−29 (esu) and exhibits a comparable OL performance with the most well-known OL materials such as In(Pc*)Cl indicating that they are potentially excellent NLO materials. Remarkably, it was also observed that the degree of vanadium substitution in POM anions corresponding to different onset of reduction potential influences the NLO and OL properties of the resulting compounds: third-order NLO and OL properties of compound 2 are inferior to those of compound 1, and are better than those of compound 3. Both their second hyperpolarizability γ values and the OL performance were observed to be inversely proportional to the HOMO–LUMO gaps of the resulting compounds. The excited charge transfer from porphyrin to POM anions in the supramolecular compounds when exposed to laser irradiation is thought to play key role in the enhancement of NLO and OL response.
研究领域:
材料科学
·
光学
·
化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）