Optimization substrates and implantation metals for high performance photoacoustic laser streaming

Abstract

Optical manipulation of fluid has been widely investigated for applications in microfluidics, and photoacoustic laser streaming provides a promising technique because of its strong driving ability and flexibility as a microfluidic pump. However, except for the gold and quart, other substrates and metals have never been investigated in the fabrication of laser streaming pump. In this work, we demonstrate the effect of substrate and metal types on the performance of laser streaming. The Au-implanted quartz pump exhibit higher initial flow speed than Fe, while the durability of Fe-implanted plate is longer. The quartz substrate has a similar initial flow speed to glass, but much better endurance under long-time laser irradiation. In addition, the flow speed of incident laser with gradually increased power will be much higher than the direct high laser power. This study demonstrates the effective laser streaming of different substrates and implantation metals, thus paves the ways for optimizing the performance of photoacoustic streaming pump.