Direct plasma printing of nano-gold from an inorganic precursor

Plasma printing and plasma-assisted printing of functional nanomaterials are being developed as important alternative fabrication techniques. Nano-gold is used in many applications including organic photovoltaics, flexible electronics, nanomedicine, catalysis and sensing, taking advantage of its uni...

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Bibliographic Details
Published in:Journal of materials chemistry. C, Materials for optical and electronic devices Materials for optical and electronic devices, 2019, Vol.7 (21), p.6369-6374
Main Authors: Hong, Jungmi, Yick, Samuel, Chow, Edith, Murdock, Adrian, Fang, Jinghua, Seo, Dong Han, Wolff, Annalena, Han, Zhaojun, van der Laan, Timothy, Bendavid, Avi, Ostrikov, Kostya (Ken), Murphy, Anthony B
Format: Article
Language:English
Subjects:
Aluminum oxide
Atomizing
Catalysis
Flexible components
Functional materials
Gold
Graphene
Nanomaterials
Nanoparticles
Optical properties
Particle shape
Photovoltaic cells
Physical properties
Plasma
Plasma jets
Precursors
Printing
Raman spectra
Rhodamine
Silicon substrates
Solar cells
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Summary:Plasma printing and plasma-assisted printing of functional nanomaterials are being developed as important alternative fabrication techniques. Nano-gold is used in many applications including organic photovoltaics, flexible electronics, nanomedicine, catalysis and sensing, taking advantage of its unique optical, electrical and physical properties, which depend on particle shape, size and distribution. A direct one-step nano-gold printing process using an HAuCl 4 solution precursor injected into an atmospheric-pressure plasma jet is demonstrated. Atomized droplets of the solution are reduced to gold nanoparticles in the plasma and deposited on the substrate. The gold film has minimal Cl content, and its structure can be controlled by the deposition time, from nanometer-size particles to a dense film that fully covers the substrate. Printing is demonstrated on substrates including silicon, alumina filter membrane, vertical graphene, and paper. The applicability of the nano-gold film as a SERS (surface-enhanced Raman scattering) platform is demonstrated by sensing of a 0.25 and 0.7 amol μm −2 of Rhodamine B on an Si and paper substrate respectively, a level undetectable in the absence of nano-gold. A direct one-step nano-gold printing process from a HAuCl 4 solution precursor is demonstrated using an atmospheric-pressure plasma jet.
ISSN:2050-7526
2050-7534
DOI:10.1039/c9tc01808e