Electronics have an increased thermal flow density due to the development of miniaturization and high integration. Effective heat management is a pressing technological issue that must be addressed. Ionic wind cooling technology is gaining popularity as a means of improving local heat...

Due to the rapid progress in printed circuit board (PCB) industries, plenty of waste etchants, characterized by the high concentration of copper chloride and hydrochloric acid, are generated continuously, which has placed a heavy burden on the environment and metal resources. Herein, a succinct...