Tao Lu-Qi, Liu Ying, Ju Zhen-Yi, Tian He, Xie Qian-Yi, Yang Yi, Ren Tian-Ling
Institute of Microelectronics, Tsinghua University, Beijing 10084, China.
Tsinghua National Laboratory for Information Science and Technology (TNList), Tsinghua University, Beijing 100084, China.
Nanomaterials (Basel). 2016 Jun 7;6(6):112. doi: 10.3390/nano6060112.
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.
在整个柔性系统中，柔性声源至关重要。将基于压电部件的传统声源集成到整个柔性系统中并非易事。此外，声源背面的声压通常比正面的声压弱。借助直接激光写入（DLW）技术，制造柔性360度热声源成为可能。使用650纳米的低功率激光来还原氧化石墨烯（GO）。然后将剥离的激光诱导石墨烯热声源附着在圆柱形瓶子的表面，使其能够在360度方向发出声音。对声源的声压级和指向性进行了测试，结果与理论结果吻合良好。由于其360度声场、高柔韧性、高效率、低成本和良好的可靠性，360度热声声源将在消费电子、多媒体系统以及超声检测与成像中得到广泛应用。
