JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Wenliang Liu,Xiaoyu Fang,Xinfeng Ju,Kang Gao,Dong Wang,Hai Xu,Jiqian Wang
Chiral Plasmonic nanomaterials have gradually illustrated intriguing circularly polarized light (CPL)-dependent properties in photocatalysis due to their unique chiral optical activity. However, the connection between chiral characteristics and catalytic performance of these materials in cooperative systems is rarely reported and remains a challenge task. In this work, branched AgAuPt nanoparticles induced by L / d -cysteine (Cys) with strong and perfectly symmetric circular dichroism (CD) signals are synthesized. Chiral branched AgAuPt nanoparticles firstly exhibit superior typical electrocatalytic performance. In the photoelectrocatalytic system, chiral branched AgAuPt nanoparticles demonstrate selective catalytic water splitting performance. Specifically, chiral branched AgAuPt with related CPL irradiation exhibits enhanced acidic hydrogen evolution reaction (HER) performance. Under the continuous irradiation of related CPL , the chiral catalyst generates more heat, which further increases the catalytic activity. This contribution of heat is supported by density functional theory (DFT) calculation results. The changes in chiroptical activity during this process are recorded by variable temperature CD spectra. This work provides a novel paradigm for designing chiral catalysis systems and emphasizes the profound promise of chiral plasmonic nanomaterials as chiral catalysts.
研究领域:
材料科学
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化学
·
物理化学
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DOI
PubMed
高影响因子
ADVANCED MATERIALS
·
2025
·
IF 26.8
Jingwen Yao,Yuling Huang,Haifeng Sun,Zhiyu Wang,Jie Xue,Zhifeng Huang,Shou-Cheng Dong,Xihan Chen,Haipeng Lu
Spin light-emitting diodes (spin-LEDs) are important for spin-based electronic circuits as they convert the carrier spin information to optical polarization. Recently, chiral-induced spin selectivity (CISS) has emerged as a new paradigm to enable spin-LED as it does not require any magnetic components and operates at room temperature. However, CISS-enabled spin-LED with tunable wavelengths ranging from red to near-infrared (NIR) has yet to be demonstrated. Here, chiral quasi-2D perovskites are developed to fabricate efficient spin-LEDs with tunable wavelengths from red to NIR region by tuning the halide composition. The optimized chiral perovskite films exhibit efficient circularly polarized luminescence from 675 to 788 nm, with a photoluminescence quantum yield (PLQY) exceeding 86% and a dissymmetry factor ( g lum ) ranging from 8.5 × 10 −3 to 2.6 × 10 −2 . More importantly, direct circularly polarized electroluminescence (CPEL) is achieved at room temperature in spin-LEDs. This work demonstrated efficient red and NIR spin-LEDs with the highest external quantum efficiency (EQE) reaching 12.4% and the electroluminescence (EL) dissymmetry factors ( g EL ) ranging from 3.7 × 10 −3 to 1.48 × 10 −2 at room temperature. The composition-dependent CPEL performance is further attributed to the prolonged spin lifetime as revealed by ultrafast transient absorption spectroscopy.
研究领域:
材料科学
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光学工程
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半导体物理
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DOI
PubMed
高影响因子
ADVANCED MATERIALS
·
2021
·Vol. 33
·期 11
·2003852
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IF 30.849
Zeyao Han,Weifei Fu,Yousheng Zou,Yu Gu,Jiaxin Liu,Bo Huang,Dejian Yu,Fei Cao,Xiaoming Li,Xiaobao Xu,Haibo Zeng
Photodetectors selective to the polarization empower breakthroughs in sensing technology for target identification. However, the realization of polarization-sensitive photodetectors based on intrinsically anisotropic crystal structure or extrinsically anisotropic device pattern requires complicated epitaxy and etching processes, which limit scalable production and application. Here, solution-processed PEA 2 MA 4 (Sn 0.5 Pb 0.5 ) 5 I 16 (PEA= phenylethylammonium, MA= methylammonium) polycrystalline film is probed as photoactive layer toward sensing polarized photon from 300 to 1050 nm. The growth of the PEA 2 MA 4 (Sn 0.5 Pb 0.5 ) 5 I 16 crystal occurs in confined crystallographic orientation of the (202) facet upon the assistance of NH 4 SCN and NH 4 Cl, enhancing anisotropic photoelectric properties. Therefore, the photodetector achieves a polarization ratio of 0.41 and dichroism ratio ( I max / I min ) of 2.4 at 900 nm. At 520 nm, the I max / I min even surpasses the one of the perovskite crystalline films, 1.8 and ≈1.2, respectively. It is worth noting that the superior figure-of-merits possess a response width of 900 kHz, I on / I off ratio of ≈3 × 10 8 , linear dynamic range from 0.15 nW to 12 mW, noise current of 8.28 × 10 −13 A × Hz −0.5 , and specific detectivity of 1.53 × 10 12 Jones, which demonstrate high resolution and high speed for weak signal sensing and imaging. The proof of concept in polarized imaging confirms that the polarization-sensitive photodetector meets the requirements for practical application in target recognition.
研究领域:
材料科学
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光学工程
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电子工程
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产品关联
DOI
PubMed
高影响因子
DALTON TRANSACTIONS
·
2024
·Vol. 53
·期 15
·6625-6630
·
IF 3.5
Jiaxiang Liu,Yuzhen Zhao,Zhe Zhang,Manni Li,Wenqi Song,Wentao Li,Zongcheng Miao
Applying molecular design to chiral organo-Zn2+ complexes, a new pair of chiral heteroleptic bis-pyrazolonate-Zn2+ enantiomers [Zn(PMBP)2(1R,2R-Chxn)] (R,R-Zn2+; HPMBP = 1-phenyl-3-methyl-4-benzoyl-5-pyrazolone and 1R,2R-Chxn = (1R,2R)-cyclohexane-1,2-diamine) and [Zn(PMBP)2(1S,2S-Chxn)] (S,S-Zn2+; 1S,2S-Chxn = (1S,2S)-cyclohexane-1,2-diamine) have been synthesized and characterized in terms of photophysical and thermodynamic properties. In addition to a small Flack parameter (0.05(3)) associated with the solid-state elucidation of S,S-Zn2+, the circular dichroism (CD) and circularly polarized light (CPL) spectra for the chiral Zn2+ enantiomers show perfect mirror symmetry, establishing that the enantiopure 1,2-diamines successfully induce the optical isomerism of R,R-Zn2+ and S,S-Zn2+. As a result of the combined strong chiral induction capability of chiral 1,2-diamines and excellent photophysical properties of the pyrazolone ligand (PMBP)−, the two Zn2+ enantiomers exhibit high-quality pure blue fluorescence (ΦPL = 9–10%) and significant CPL activity (|glum| = 0.0065–0.0068). The heteroleptic strategy adopted in this study offers a new route to develop high-performance chiroptical luminophores.
研究领域:
化学
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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
ACS Nano
·
2019
·
IF 13.903
Jiaqi Ma,Chen Fang,Chao Chen,Long Jin,Jiaqi Wang,Shuai Wang,Jiang Tang,Dehui Li
Chiral materials are of particular interest and have a wide range of potential applications in life science, material science, spintronic, and optoelectronic devices. Two-dimensional (2D) hybrid organic–inorganic lead halide perovskites have attracted increasing attention. Incorporating the chiral organic ligands into the layered lead iodide frameworks would introduce strong chirality in pure 2D perovskites for potential applications in circularly polarized light (CPL) emission and detection; nonetheless, studies on those aspects are still in their infancy. Here, we report on the strong CPL emission and sensitive CPL detection in the visible-wavelength range in pure chiral (R-/S-MBA)2PbI4 (MBA = C6H5C2H4NH3) 2D perovskites, which are successfully synthesized with a needle shape and millimeter size by incorporating the chiral molecules. The chiral 2D perovskites (R-MBA)2PbI4 and (S-MBA)2PbI4 exhibit an average degree of circularly polarized photoluminescence (PL) of 9.6% and 10.1% at 77 K, respectively, and a maximum degree of the circularly polarized PL of 17.6% is achieved in (S-MBA)2PbI4. The degree of circularly polarized PL dramatically decreases with increasing temperature, implying that the lattice distortion induced by the incorporated chiral molecules and/or temperature-dependent spin flipping might be the origin for the observed chirality. Finally, CPL detection has been achieved with decent performance in our chiral 2D perovskite microplate/MoS2 heterostructural devices. The high degree of the circularly polarized PL and excellent CPL detection together with the layered nature of pure chiral 2D perovskites enables them to be a class of very promising materials for developing and exploring spin associated electronic devices based on the chiral 2D perovskites.
研究领域:
材料科学
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光电子学
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自旋电子学
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纳米技术
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物理化学
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DOI
高影响因子
ACS Photonics
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2024
·
IF 6.5
Ruiqin Huang,Jingnan Hu,Zhuo Yang,Yoshimitsu Kohama,Xinhui Zhang,Xixiang Zhu,Huakun Zuo,Jinyu Zou,Tao Peng,Liang Li,Gang Xu,Yibo Han
Spin–orbital coupling (SOC) in asymmetric two-dimensional semiconductors exhibits the Rashba effect. This coupling also shows spin-selective electric and optical properties, which are crucial for spintronic applications. Herein, we report the behavior of large circularly polarized excitonic photoluminescence in a two-dimensional lead halide perovskite in a magnetic field. The degree of circular polarization was found to be anisotropic and also dependent on the number of atomic layers, with saturation values of 31 and 3.5% at 4.2 and 200 K, respectively. The results were well simulated through theoretical calculations, where stronger Rashba SOC induced higher circular polarization in an external magnetic field. This high circular polarization at elevated temperatures, combined with the high light-emission efficiency, highlights the application potential of perovskite semiconductors in spin-photonic devices.
研究领域:
材料科学
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光学
·
凝聚态物理
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产品关联
DOI
高影响因子
CHEMISTRY OF MATERIALS
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2022
·
IF 10.508
Maoxin Li,Feier Fang,Xiao Huang,Guangyou Liu,Zheng Lai,Zhihao Chen,Jiahao Hong,Yu Chen,Rong-jia Wei,Guo-Hong Ning,Kai Leng,Yumeng Shi,Bingbing Tian
Chiral organic–inorganic hybrid perovskites (OIHPs) are inversion-asymmetric and have many remarkable properties, including circular dichroism, optical rotation, nonlinear optics, and second-harmonic generation (SHG). Although chiral molecules are responsible for chiroptical properties, they are generally not expected to influence the crystallization of OIHPs. Here, we find that OIHPs synthesized with pristine S- and R-molecules crystallize as 1D perovskites, whereas those synthesized with the racemic molecule crystallized as 2D perovskites. Single crystal X-ray diffraction reveals that the structure change is related to the differing packing of chiral molecules versus racemic ones in OIHPs. Furthermore, we demonstrate that chiral OIHPs containing the S- or R-ligands could be applied in circularly polarized light detectors.
研究领域:
材料科学
·
光学
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产品关联
DOI
高影响因子
ACS Nano
·
2023
·
IF 17.1
Rui Gao,Changlong Hao,Liguang Xu,Xinxin Xu,Jing Zhao,Maozhong Sun,Qing Wang,Hua Kuang,Chuanlai Xu
Titanium dioxide (TiO2) has attracted significant attention in the fields of antibacterial activity and pollutant degradation due to its well-known photocatalytic properties. However, the application of TiO2 is significantly limited by its large band gap width, which only allows excitation by ultraviolet light below 400 nm. Here, we propose the use of surface chiral functionalization of TiO2 to tune its band gap width, thus enabling it to be excited by near-infrared-region light (NIR), resulting in the effective separation of electron–hole pairs. By controlling the solvent polarity and forming numerous weak interactions (such as hydrogen bonding) between chiral ligands and TiO2, we successfully prepared chiral TiO2 superparticles (SPs) that exhibited a broad circular dichroism (CD) absorption at 792 nm. Under circularly polarized light (CPL) at 808 nm, the chiral SPs induced the separation of electron–hole pairs in TiO2, thus generating hydroxyl and singlet oxygen radicals. Antibacterial tests under CPL in NIR showed that the chiral TiO2 SPs exhibited excellent antibacterial performance, with inhibition rates of 99.4% and 100% against Gram-positive and Gram-negative bacteria, respectively. Recycling–reuse experiments and biocompatibility evaluation of the material demonstrated that the chiral TiO2 SPs are stable and safe antibacterial materials, thus indicating the potential application of chiral TiO2 SPs in antibacterial aspects of medical implants.
研究领域:
材料科学
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生物学
·
医学
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产品关联
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Jiaqi Huang,Guanfeng Gao,Xuebing Wen,Ming Yuan,Nan Hou,Yuyang Pu,Yifan Feng,Xiao-Fang Jiang,Xiaowen Hu,Guofu Zhou
Nonreciprocal devices, enabling asymmetric light transmission, are essential for many photonic applications. However, nonreciprocal devices driven by circularly polarized incident light, without relying on optical nonlinearity or magnetic fields, have been rarely reported. This study introduces a novel nonreciprocal device based on a photothermally driven cholesteric-to-isotropic phase transition (CIT) in cholesteric liquid crystals (CLCs). The device enables nonreciprocal transmission of circularly polarized light (CPL) without requiring external bias, magnetic fields, or optical nonlinearity. By incorporating a polydopamine (PDA)-doped polyvinyl acetate (PVA) layer for photothermal conversion, the device achieves self-biasing through heat generated by the incident signal light. The performance is tunable, with transmission contrast and insertion loss adjustable via the PDA concentration. At 808 nm CPL, the device achieves an isolation ratio of 7.7 dB and an insertion loss of 1.1 dB. Additionally, extending the photonic bandgap of the CLCs allows nonreciprocal performance at 405 nm CPL, with a high isolation ratio of 16.5 dB. The device also functions as an optical switch, enabling low-power signal light transmission with pump light assistance, and shows promise for applications in digital holography. These capabilities highlight the device's potential for use in all-optical communication networks and chirality-based photonic systems.
研究领域:
光学
·
材料科学
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产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Chenlin Wang,Wei Zhang,Haixiao Zhao,Baoqing Sun,Xian Zhao,Dan Luo,Yuan Gao
Circularly polarized light (CPL) is vital for optical communication, quantum information, 3D displays, and bioimaging. Traditional CPL generation using linear polarizers and quarter-wave plates suffers from significant energy loss. Here, we present a chiral vertical-cavity surface-emitting laser (VCSEL) by integrating face-down aligned CdSe/CdZnS colloidal quantum wells (CQWs, also known as nanoplatelets) with a cholesteric liquid crystal (CLC)-based distributed Bragg reflectors (DBRs). The CLC reflectors selectively reflect CPL matching their handedness, enhancing lasing, and ensuring a dominant output of the same handedness. The face-down aligned CQWs offer i) directional emission for precise spectral matching with the CLC-DBR stop band and ii) optimized light-matter coupling via dipole alignment with cavity modes. This leads to a lower lasing threshold and high polarization dissymmetry, achieving a |g-factor| of 1.9. The lasing process further amplifies circular polarization asymmetry, increasing the right-CP ( R -CP) to left-CP ( L -CP) intensity ratio from 0.21 in fluorescence to 41.7 in lasing. Furthermore, we demonstrate flexible chiral VCSELs with mechanically tunable emission wavelengths while maintaining performance. Our approach provides an efficient and customizable strategy for next-generation high-purity CPL sources, paving the way for advanced photonic applications.
研究领域:
光学
·
材料科学
·
量子信息科学
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产品关联
DOI
高影响因子
ACS Omega
·
2025
·
IF 4.3
Hongbo Zhao,Ling-Yan Xu,Xing-Yu Zhang,Renjun Pei,Pei-Xi Wang
The efficient generation of circularly polarized light (CPL) is crucial in information technologies such as optical communications and three-dimensional displays. In nature, many plants and animals can transform unpolarized light into CPL with chiral helical superstructures, which has inspired the development of CPL-related materials and devices. Herein, by combining the self-assembled chiral nematic liquid crystalline microstructures of cellulose nanocrystals with geometrical configurations of Fresnel lenses, free-standing solid-state cellulosic converging lenses with large sizes, circular polarization features, and adjustable chiral photonic bandgaps were fabricated at low cost, which could produce CPL beams exhibiting dissymmetry factors (g = 2(IL – IR)/(IL+ IR)) up to −0.61 ± 0.02 by focusing sunlight and generate real images of distant objects. These results may help guide the development of polarized light sources or imaging systems, and also suggest a simple method to construct multifunctional optical devices from photonic crystals.
研究领域:
光学材料
·
纳米技术
·
生物仿生学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Jiaxin Wang,Yuanzhou Zhang,Jun Chen,Yi Wei,Dejian Yu,Lumeng Liang,Yang Liu,Ye Wu,Weili Shen,Xiaoming Li,Haibo Zeng
In this work, we proposed a fluorescence conversion layer with polarization characteristics to enhance UV polarization detection for the first time. To achieve this goal, the colloidal lead halide CsPbBr3 nanowires (NWs) with appropriate lengths were synthesized by the method of ultrasonication synthesis assisted by the addition of hydrobromic acid (HBr) ligands. By adding HBr, the properties of synthesized NWs are improved, and due to the controllable perovskite-stretched NWs, polymer composite films were fabricated, which can generate photoluminescence (PL) with strong polarization. The optimized stretched composite film can achieve a polarization degree of 0.42 and dichroism ratio (I∥/I⊥) of 2.49 at 520 nm. Based on this film, an imaging system with polarization-selective properties and efficient UV spectral conversion was developed. The spectrum conversion of 266 to 520 nm luminescence wavelength was realized and sensitive to the polarization of incoming 266 nm UV light. The experimental results also showed that the response after spectral conversion is greatly improved, and different responsivities can correspond to different polarization states. This imaging system overcomes the insufficiency of the conventional charge coupled device (CCD), which makes it difficult to receive the optical signal for high-quality UV imaging. The use of light conversion films with polarization characteristics for polarized UV imaging is of great significance for improving the detection of solar-blind UV bands and the recognition of military targets.
研究领域:
材料科学
·
光学工程
·
光电技术
✓ 已验证
DOI
高影响因子
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