Superfast assembly and synthesis of gold nanostructures using nanosecond low-temperature compression via magnetic pulsed power

Binsong Li, Kaifu Bian, J. Matthew D. Lane, K. Michael Salerno, Gary S. Grest, Tommy Ao, Randy Hickman, Jack Wise, Zhongwu Wang and Hongyou Fan ()
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Binsong Li: Sandia National Laboratories
Kaifu Bian: Sandia National Laboratories
J. Matthew D. Lane: Sandia National Laboratories
K. Michael Salerno: Sandia National Laboratories
Gary S. Grest: Sandia National Laboratories
Tommy Ao: Sandia National Laboratories
Randy Hickman: Sandia National Laboratories
Jack Wise: Sandia National Laboratories
Zhongwu Wang: Cornell High Energy Synchrotron Source, Cornell University
Hongyou Fan: Sandia National Laboratories

Nature Communications, 2017, vol. 8, issue 1, 1-9

Abstract: Abstract Gold nanostructured materials exhibit important size- and shape-dependent properties that enable a wide variety of applications in photocatalysis, nanoelectronics and phototherapy. Here we show the use of superfast dynamic compression to synthesize extended gold nanostructures, such as nanorods, nanowires and nanosheets, with nanosecond coalescence times. Using a pulsed power generator, we ramp compress spherical gold nanoparticle arrays to pressures of tens of GPa, demonstrating pressure-driven assembly beyond the quasi-static regime of the diamond anvil cell. Our dynamic magnetic ramp compression approach produces smooth, shockless (that is, isentropic) one-dimensional loading with low-temperature states suitable for nanostructure synthesis. Transmission electron microscopy clearly establishes that various gold architectures are formed through compressive mesoscale coalescences of spherical gold nanoparticles, which is further confirmed by in-situ synchrotron X-ray studies and large-scale simulation. This nanofabrication approach applies magnetically driven uniaxial ramp compression to mimic established embossing and imprinting processes, but at ultra-short (nanosecond) timescales.

Date: 2017
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DOI: 10.1038/ncomms14778

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