Fig. (a) Advanced Materials cover image; (b) Schematic diagram of droplet volatilization self-assembly process; (c) Droplet volatilization self-assembly process; (di) Three-dimensional view of nanogold superlattice structure and scanning electron micrograph. Recently, researcher Yu Xuefeng of the Institute of Advanced Technology of the Chinese Academy of Sciences in Shenzhen and Zhu Jianhao, a professor at City University of Hong Kong, have made new breakthroughs in the field of nanometer self-assembled three-dimensional superlattice optical chips. The related paper Evaporative Self-Assembly of Gold Nanorods into Macroscopic 3D Plasmonic Superlattice Arrays (DOI: 10.1002/adma.201505617) has been covered by the Materials Magazine Advanced Materials Cover (Inside Front Cover). A superlattice is a new type of metamaterial formed by periodic and ordered packing of nanoparticles. In a superlattice structure, adjacent nanoparticles arranged in an ordered manner interact with each other under the action of light, electricity, magnetism, etc., thereby generating an overall collection property that the nanoparticles themselves do not possess. Therefore, the nanosuperlattice is considered to be a nanometer. The effective transition of materials to macro devices has enormous potential for application in fields such as display, sensing, solar cells, and optical fiber communications. Droplet volatilization self-assembly technology is a simple and effective traditional method for constructing a superlattice structure. However, during solvent evaporation, the outward capillary motion of the droplets will carry the suspended particles to the edges of the droplets and deposit at the edges to form a ring. This well-known "coffee-ring effect" often leads to uneven deposition of nanoparticles, which seriously affects their alignment and ordered self-assembly. Therefore, how to suppress the “coffee circle effect†and build a nanoscale self-assembled superlattice structure at the macroscopic scale is a difficult problem to be solved urgently in the relevant fields in the world. In order to solve this problem, members of the research group Li Penghui and Li Yong have established an anti-delicious effect method that can effectively control the self-assembly behavior of particles on the surface of droplets during droplet evaporation. Taking the gold nanorods as an example, by simply controlling the surface chemical properties of the particles and the characteristics of the substrate, a dense, regular, and vertical super-large-scale self-assembly arrangement of the gold nanorods can be achieved, and a three-dimensional superlattice structure of a centimeter scale can be successfully constructed and displayed. Excellent Raman enhancement and optical uniformity. Moreover, through detailed mechanism analysis, an effective method for constructing such a three-dimensional superlattice is given, which can be extended to various nanomaterials. This achievement achieves the large-scale preparation of cm-scale three-dimensional superlattice optical chips and can be widely used in many fields such as surface-enhanced Raman spectroscopy (SERS), fluorescence enhancement, solar cells, and biochips; more importantly, the The results achieved a breakthrough in the “coffee circle effect†and provided a simple and effective method for achieving ultra-large-scale nanoscale self-assembly. This bridge has been established between nanomaterials and macroscopic applications, which is of great significance to the development of nanoscience. This topic was funded by the National Natural Science Foundation of China, the Natural Science Foundation of Guangdong Province, and the Shenzhen Branch Commission for Innovation.
What does angle valve do?
An angle valve has an inlet and an outlet port which are perpendicular to each other. It is sorted as the manual valves and it is usually used to prevent or control the flow of a liquid in a pipe and this is the reason for it is sometimes called simply as stop valve.
What type of valve is an angle valve?
Also called compression valves, angle stop valves are the emergency shutoff valves located under each water-using appliance and fixture in your home.
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Shenzhen Advanced Institute, etc. Obtained in the Study of Nano-Self-Assembled 3D Superlattice Optical Chips