At present, the problem faced by silicon nanowires is that it is difficult to realize industrial production. By 2022, although the research of silicon nanowires has made great progress, there are still many problems to be solved from the actual industrial mass production and application. For example, there are many preparation routes of silicon nanowires, but they are not mature enough to realize mass production; At the same time, the preparation cost is always high, and it is difficult to realize industrial production. This is the problem that silicon nanowires are facing at present.