Synthesis of CuO Nanocrystals and Sequential Assembly of Nanostructures with Shape-Dependent Optical Absorption upon Laser Ablation in Liquid

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Abstract

In the past decade, it has become possible to synthesize many classes of nanoscale building blocks with controlled structure, size, and shape for applications in electronics, photonics, chemical engineering, medicine, etc. Successively, researchers need face a fundamental challenge: how to use nanoscale blocks to build functional structures or devices. Nanomanufacturing, fabricating, or assembling of building blocks for large-scale applications thus urgently emerges in the presented nanotechnology. For this issue, in this paper we report a unique nanomanufacturing, which can achieve from nanocrystal synthesis to sequential functional structure nanomanufacturing within one step. This novel technique is the electrical field assisted laser ablation in liquid (EFLAL). Using EFLAL, we first synthesize CuO nanocrystals and sequentially fabricate CuO functional structures, i.e., nanospindles with shape-dependent optical absorption that are expected to be applicable to biology or medicine. Importantly, these two processes, synthesis and assembly, are finished within one step. Additionally, we discuss basic physical and chemical mechanisms involved in nanomanufacturing from laser ablation in liquid.

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