Layered Seed-Growth of AgGe Football-like Microspheres via Precursor-Free Picosecond Laser Synthesis in Water

Scientific Reports
Dongshi ZhangS Barcikowski

Abstract

Hybrid particles are of great significance in terms of their adjustable optical, electronic, magnetic, thermal and mechanical properties. As a novel technique, laser ablation in liquids (LAL) is famous for its precursor-free, "clean" synthesis of hybrid particles with various materials. Till now, almost all the LAL-generated particles originate from the nucleation-growth mechanism. Seed-growth of particles similar to chemical methods seems difficult to be achieved by LAL. Here, we not only present novel patch-joint football-like AgGe microspheres with a diameter in the range of 1 ~ 7 μm achievable by laser ablation in distilled water but also find direct evidences of their layered seed growth mechanism. Many critical factors contribute to the formation of AgGe microspheres: fast laser-generated plasma process provide an excellent condition for generating large amount of Ge and Ag ions/atoms, their initial nucleation and galvanic replacement reaction, while cavitation bubble confinement plays an important role for the increase of AgGe nuclei and subsequent layered growth in water after bubble collapse. Driven by work function difference, Ge acts as nucleation agent for silver during alloy formation. This new seed-growth mechanis...Continue Reading

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Citations

Feb 14, 2017·Chemical Reviews·Dongshi ZhangStephan Barcikowski
Dec 30, 2016·Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry·Tim SchmitzBilal Gökce
Oct 25, 2016·Journal of Colloid and Interface Science·Cheng-Yu ShihLeonid V Zhigilei
Apr 23, 2020·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Tim HupfeldUlf Wiedwald
May 11, 2021·Physical Chemistry Chemical Physics : PCCP·Shun-Xing LiangStephan Barcikowski

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