A 3D pillar-layered cobalt(ii) CP with a 3D (4,6)-connected {4⁴·6¹⁰·8}{4⁴·6²} fsc net was designed and it showed great potential as an electrocatalyst in the overall water splitting and as a chemosensor for Cr(vi) anion detection.

Carbon effectively facilitated the charge transfer and separation between the tetragonal and orthorhombic nanoparticles in mixed-phase SnO₂.

Direct femtosecond laser writing or inscription is a useful technique, and it has been employed to engineer various materials in many applications including nonlinear photonic crystals, which are of periodically patterned second-order nonlinearity to get and control the coherent light at new frequencies. By manipulation of second-order nonlinearity, either erased or poled, quasi-phase matching has been achieved in several crystals, especially three-dimensional nonlinear photonic crystals have been originally proposed and proved to be truly three-dimensional. Here we shortly review on the recent advances in the research field of nonlinear photonic crystals inscribed by femtosecond laser, as well as look into the future in this field.

Quasi-free-standing graphene on a SiC substrate was directly prepared by using the induced graphene growth method.

To deterministically generate silicon vacancies (V_Si) with high positioning accuracy and specific defect orientations is one of the outstanding challenges in the development of a new generation of quantum information technologies. Here, we firstly propose and experimentally demonstrate the laser writing method for the selective generation of silicon vacancy color centers with different defect orientations or types (V1 and V2). The results indicate that when processed at a wavelength of 1030 nm, an increased number of pulses significantly enhance the silicon vacancy color center yield, with a dominant presence of V1. In contrast, at a wavelength of 800 nm, high pulse energy (1000 nJ, corresponding to a specific power density of 4.917037 × 10¹⁸ W m⁻²) improves the generation probability ratio between V2 and V1 color centers, suggesting potential for selective enhancement. Based on simulation results and theoretical analysis, we attribute the generation probability of V1 and V2 centers to the different multi-photon absorption processes and defect ionization levels during femtosecond laser processing. These results highlight the facile optical fabrication of specific defect types for quantum technologies.

Direct femtosecond laser writing or inscription is a useful technique, and it has been 1 employed to engineer various materials in many applications including nonlinear photonic crystals, 2 which are of periodically patterned second-order nonlinearity to get and control the coherent light at 3 new frequencies. By manipulation of second-order nonlinearity, either erased or poled, quasi-phase 4 matching has been achieved in several crystals, especially three-dimensional nonlinear photonic 5 crystals have been originally proposed and proved to be truly three-dimensional. Here we shortly 6 review on the recent advances in the research field of nonlinear photonic crystals inscribed by 7 femtosecond laser. We also discuss some phenomena that not understood yet and the future possible research topics in this field.