Dr. Xinling Liu from Kanagawa University, Japan visited
At the invitation of Prof. Zhang, Xinling Liu, a postdoctoral fellow from Kanagawa University in Japan, came to Suzhou Institute of Nanotechnology and gave an academic report entitled "Nano/Chiral Silica Material Biomimetic Synthesis and Development".
Dr. Xinling Liu received a Ph.D. in physical chemistry from the Shanghai Institute of Ceramics, Chinese Academy of Sciences in 2013, and engaged in post-doctoral research at Kanagawa University, Japan from 2014 to 2017. Research directions include: 1) Biomimetic synthesis and application of organic/inorganic composite materials; 2) Chiral inorganic nanomaterials.
The summary of the report is as follows:
Most of the inorganic minerals in organisms are formed under the control of organic matter, and have the characteristics of mild synthesis conditions, exquisite structure, and superior functions. These mineralization processes selected by biological evolution provide a lot of inspiration and enlightenment for material design and synthesis. In this study, based on the formation mechanism of the silicon dioxide (SiO2) mineral in the cell wall of diatoms, we synthesized in the laboratory a polymer-polyethylene which has a function similar to the amine biomolecules contained in the diatoms. Amine (referred to as PEI), uses the linear structure and crystalline polymer self-assembly of PEI as a template/catalyst/skeleton to induce the deposition of SiO2, and develops a unique biomimetic controllable synthesis method of SiO2, which can be at room temperature Under the conditions, SiO2 powders and films with different micro-nano structures are quickly obtained, and a variety of functional composite materials (such as hydrophilic and hydrophobic films, luminous bodies, catalysts, lithium ion battery electrodes, etc.) have been further developed. Chirality refers to the property that objects and their mirror images cannot overlap (like the relationship between left and right hands). It is a basic attribute of nature. Most organic substances have chirality. However, the concept of chirality is rarely mentioned in inorganic substances. . On the basis of the above-mentioned biomimetic synthesis methods, we have skillfully transferred the chiral characteristics of organic matter into the inorganic material system, synthesized high-temperature (900 degrees) chiral SiO2 nanofibers, and derived other new types from this. Chiral inorganic nanomaterials (silicon, transition metal oxides, TiO2, carbon nanomaterials, etc.) and chiral polymers. (Contribution: Fang Dan)
