Since the discovery of ordered mesoporous silica in the 1990s, mesoporous materials have attracted a great deal of interest because of their wide application prospects in the field of biosensing, separation, adsorption, and catalysis. Using the ordered mesoporous material as a template and through the 'nano casting' process such as filling, reduction, and template removal of the precursor, a variety of ordered pore nanocrystalline materials can be obtained, including metal oxides, metals, and alloys. However, to this day, different from the successful realization of controlled synthesis of nanocrystals in free solution systems, it is still a great challenge to regulate the growth of metal nanocrystals in the confined space of the mesoporous channels by nanocasting. This is because the metal has a high migration ability in the silica template, which makes it difficult to inhibit the migration of the product to the template during the introduction of the metal precursor and subsequent reduction.

In the past few years, Prof. Fang Jixiang’s group at the School of Telecommunication at Xi’an Jiaotong University has been focusing on the application of ordered mesoporous materials in plasmonic nanooptics. The research group used nano-casting to obtain a noble metal nanoparticle superlattice structure, which achieved light capture and enhancement with its ultra-small nanoparticle spacing (~2 nm), and obtained high-sensitivity surface-enhanced Raman scattering. Spectral (Advanced Optical Materials. 2015, 3(3), 404; Nanoscale, 2015, 7, 12318.). These studies are the earliest work in the world to introduce plasmonic nano-casting technology into plasmonic nano-optics. In the follow-up work, the plasmon hybrid mode of 'nanopore-nano-gap' under in-situ etching conditions was further studied, and further enhancement of Raman spectra was obtained (Advanced Functional Materials, 2017, DOI: 10.1002/adfm. 201603233). At the same time, the mechanism of the growth mechanism of nanocrystals during nano-casting was studied (Small, 2018, DOI: 10.1002/smll.201702565).

Recently, Prof. Fang Jixiang's research team collaborated with Prof. Li Zhiyuan of South China University of Technology and Prof. Xiong Qihua of Nanyang Technological University of Singapore to obtain a high-quality, high-purity, monodisperse high-quality precious metal nanostructure through a 'soft package' scheme. Successfully solved the long-term technical problem of product diffusion into the mesoporous template during the noble metal nano-casting process. These ordered mesoporous structures have excellent properties in applications such as electrochemical catalysis, cancer drug delivery and compound therapy, and plasmon nanooptics. The successful resolution of this technical problem has laid an important foundation for the development of related performance. This research result "A general soft-enveloping strategy in the templating synthesis of mesoporous metal nanostructures" was published in Nature Communications, doi: 10.1038/s41467-018-02930-9 on February 6th, and the paper was used by the Nature Research Chemistry Community as The highlight report (https://chemistrycommunity.nature.com/) is the first author of the thesis and the only author of the correspondence. The above work has received funding support from the National Natural Science Foundation of China and key research and development programs in Shaanxi Province.

Aluminum Construction Profile

Aluminum Construction Profiles, Aluminum Construction Profile Of Trim,L Shaped Aluminum Extrusion

Wuqiang Xingdou International Trade Co., Ltd , https://www.xdaluminumproducts.com