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Optical logic gates based on nonlinear optical property of material with ultrafast response speed and excellent computational processing power can break the performance bottleneck of electronic transistors. As one of the layered 2D materials, Ta2NiS5 exhibits high anisotropic mobility, exotic electrical response, and intriguing optical properties. Due to the low-symmetrical crystal structures, it possesses in-plane anisotropic physical properties. The optical absorption information of Ta2NiS5 is investigated by anisotropic linear absorption spectra, femtosecond laser intensity scanning (I-scan), and non-degenerate pump-probe technology. The I-scan results show a distinct maximum of ∼4.9 % saturable absorption (SA) and ∼4 % reverse saturable absorption (RSA) at different polarization directions of the incident laser. And, these unique nonlinear optical (NLO) properties originate from the anisotropic optical transition probability. Furthermore, the novel Ta2NiS5-based all-optical logic gates are proposed by manipulating the NLO absorption processes. And, the all-optical OR and NOR logic gates possess an ultrafast response speed approaching 1.7 THz. Meanwhile, an all-optical information transmission method with higher security and accuracy is achieved, which has promising potential to avoid the disclosure of information. This work provides a new path for designing versatile and novel optical applications based on Ta2NiS5 materials.

Due to the extraordinary chemical and physical properties, ternary chalcogenides with wide‐range bandgap, unique structures, and exceptional photoelectric properties have attracted great interest recently. Among them, Chromium thiophosphate (CrPS4) is a promising semiconductor with excellent optical, mechanical, and electronic properties and has a lower lattice symmetry resulting in significant in‐plane anisotropy. Here, the polarization‐dependent nonlinear optical (NLO) responses of CrPS4 flake are investigated. Based on polarization‐resolved Raman spectroscopy, which identifies the crystal axis of sample, the anisotropic linear absorption spectra, I‐scan technique, and pump‐probe measurements are utilized to investigate the optical absorption information of CrPS4. The polarization‐dependent NLO responses are found originating from the anisotropic optical transition probability. And the polar optical phonons play an important role in carrier relaxation processes. Furthermore, CrPS4‐based all‐optical switches are proposed, which can modulate the transmittance of signal light (CW laser) by changing the polarization of switch light (fs laser). This work provides insights into polarization‐dependent CrPS4‐based devices, which is important to promote the potential applications in optical modulator, versatile optoelectronic detection, and so on. [ABSTRACT FROM AUTHOR]

Optical logic gates based on nonlinear optical property of material with ultrafast response speed and excellent computational processing power can break the performance bottleneck of electronic transistors. As one of the layered 2D materials, Ta2NiS5 exhibits high anisotropic mobility, exotic electrical response, and intriguing optical properties. Due to the low-symmetrical crystal structures, it possesses in-plane anisotropic physical properties. The optical absorption information of Ta2NiS5 is investigated by anisotropic linear absorption spectra, femtosecond laser intensity scanning (I-scan), and non-degenerate pump-probe technology. The I-scan results show a distinct maximum of ∼4.9 % saturable absorption (SA) and ∼4 % reverse saturable absorption (RSA) at different polarization directions of the incident laser. And, these unique nonlinear optical (NLO) properties originate from the anisotropic optical transition probability. Furthermore, the novel Ta2NiS5-based all-optical logic gates are proposed by manipulating the NLO absorption processes. And, the all-optical OR and NOR logic gates possess an ultrafast response speed approaching 1.7 THz. Meanwhile, an all-optical information transmission method with higher security and accuracy is achieved, which has promising potential to avoid the disclosure of information. This work provides a new path for designing versatile and novel optical applications based on Ta2NiS5 materials. [ABSTRACT FROM AUTHOR]

To explore a methodology for tailoring the d-band center of metal oxide catalysts, a distinctive composite is synthesized by incorporating polyaniline (PANI) particles with specific atoms of Co3O4 nanorods. The introduction of the requisite amount of PANI significantly enhances the electrocatalytic activity, yielding an excellent functionality with a minimum detection limit of 0.676 μM and a high sensitivity of 3.024 μA μM–1 cm–2 for glucose. The opening potential for the oxygen evolution reaction registers at 1.41 V, while the overpotential is 290 mV. However, when the PANI layer completely covers the Co3O4 surface, a substantial decline in electrochemical properties is observed, indicating that active atoms on the Co3O4 plane should be preferentially exposed. Additionally, density functional theory calculations reveal that bonding of an appropriate quantity of polyaniline particles can modify bonding states and antibonding states of Co–O within the Co3O4 complex, leading to a shift of the d-band center closer to the Fermi level, thereby enhancing its electrocatalytic activity. These findings underscore the practicality of this manipulation strategy for glucose sensing and oxygen evolution reaction. [ABSTRACT FROM AUTHOR]

A set of optimal conditions for supercritical fluid extraction (SFE) of daidzein in soybean previously subjected to extrusion at the rotate speed of screw 4.5×g and the temperature of 80°C was developed. The quadratic orthogonal rotation design with five factors (extracting temperature, extracting time, ethanlol content, cosolvent quantity and flow rate) was used and a mathematical model was developed based the experimental results. Optimal conditions were verified and compared with control experiments conducted in parallel. The results from SFE showed that all five experiment factors had significant effects on the yield of daidzein. The mathematical model agreed well with the experimental results. It was found that there were 27 optimal extract conditions under which daidzein yield was higher than 0.092%. The optimal extracting conditions were stable and reproducible. Results from the control experiments showed that extrusion could significantly enhance the extraction of daidzein. The extraction of daidzein from extruded soybean and its products with supercritical CO2 is a potential technique for practical applications in the future. [ABSTRACT FROM AUTHOR]