A Flexible 360-Degree Thermal Sound Source Based on Laser Induced Graphene

作者：Tao Lu Qi; Liu Ying; Ju Zhen Yi; Tian He; Xie Qian Yi; Yang Yi^*; Ren Tian Ling^*

来源：Nanomaterials, 2016, 6(6): 112.

DOI：10.3390/nano6060112

• 360-degree sound source
• graphene oxide
• laser induced graphene
• direct laser writing

A flexible sound source is essential in a whole flexible system. It's hard to integrate a conventional sound source based on a piezoelectric part into a whole flexible system. Moreover, the sound pressure from the back side of a sound source is usually weaker than that from the front side. With the help of direct laser writing (DLW) technology, the fabrication of a flexible 360-degree thermal sound source becomes possible. A 650-nm low-power laser was used to reduce the graphene oxide (GO). The stripped laser induced graphene thermal sound source was then attached to the surface of a cylindrical bottle so that it could emit sound in a 360-degree direction. The sound pressure level and directivity of the sound source were tested, and the results were in good agreement with the theoretical results. Because of its 360-degree sound field, high flexibility, high efficiency, low cost, and good reliability, the 360-degree thermal acoustic sound source will be widely applied in consumer electronics, multi-media systems, and ultrasonic detection and imaging.

• 出版日期2016-6
• 单位清华大学