Shenzhen Advanced Institute successfully developed the high efficient preparation technology of black phosphorene plasma humoral phase

Recently, Yu Xuefeng, researcher of Shenzhen Institute of advanced technology, Chinese Academy of Sciences, and Huang Yifan, senior engineer, have made a new breakthrough in the field of high-quality black phosphorene preparation Relevant research results were published in chemical communications (DOI: 10.1039 / c9cc07640a) under the title of "rapid and scalable production of high quality phosphorene by plasma liquid technology" The first author of the paper is assistant researcher Huang Hao, and the co first author is Dr Kang Yihong The collaborators include Professor Zhu Jianhao and Professor Ricardo Ibarra of the Aragon Institute of nanoscience in Spain As a two-dimensional layered material with adjustable band gap, black phosphorene has great potential in the field of optical / electronic devices At present, the main method to prepare black phosphorus is liquid shear / ultrasonic stripping method, but the young's modulus of black phosphorus itself is small, long-time shear / ultrasonic will lead to the smaller lamellae and more defects, and easy to occur oxidation, which limits the application of black phosphorus Therefore, it is very important to develop a high efficient method for the preparation of high-quality large-scale black phosphorene Different from solid, liquid and gas, plasma is composed of ions, electrons and the collection of non ionized neutral particles It is in a neutral state as a whole, also known as "the fourth state of matter" As a green industrial technology, plasma technology has been widely used in material surface treatment, nano material synthesis and semiconductor manufacturing However, there is no report on the technical route of preparing black phosphorene by plasma technology In the early stage, the team has done a lot of work in the preparation of black phosphorene by liquid-phase ultrasound and ion intercalation In this work, based on many years of experience in the preparation of black phosphorene and the characteristics of plasma technology, the team independently designed a plasma humoral phase preparation system, including power module, reaction module, etc A plasma is generated at the anode by a high-voltage power supply, which acts on N, N-dimethylformamide solvent The active particles in the plasma convert n, N-dimethylformamide decomposes, and the decomposition product intercalates the cathode black phosphorus crystal under the electric field drive At the same time, gas is generated between the layers, weakening the interlayer force, making the black phosphorus crystal expand rapidly, so as to prepare high-quality and large-size black phosphorene efficiently At the same time, due to the short preparation time, the oxidation degree of phosphorene prepared by this method is low, showing excellent photoelectric response performance, which lays a foundation for the application of black phosphorene as high-performance electronic materials The above research has been strongly supported by the general program of NSFC, the frontier key program of Chinese Academy of Sciences, Shenzhen Science and technology program, etc