Nanospray processing of silver nanoparticles for formation of dried deposits

0543864 - ÚIACH 2022 RIV CZ eng C - Conference Paper (international conference)
Týčová, Anna - Jonas, Vladimír - Přikryl, Jan - Kotzianová, A. - Velebný, V. - Foret, František
Nanospray processing of silver nanoparticles for formation of dried deposits.
12TH INTERNATIONAL CONFERENCE ON NANOMATERIALS RESEARCH & APPLICATION (NANOCON 2020). Ostrava: TANGER Ltd, 2021, (2021), s. 524-528. ISBN 978-80-87294-98-7. E-ISSN 2694-930X.
[International Conference NANOCON 2020 /12./. Brno (CZ), 21.10.2020-23.10.2020]
R&D Projects: GA ČR(CZ) GJ20-14069Y
Institutional support: RVO:68081715
Keywords : nanoparticles * nanospray * silver
OECD category: Analytical chemistry
https://www.confer.cz/nanocon/2020/3768-nanospray-processing-of-silver-nanoparticles-for-formation-of-dried-deposits

Nanospray transfers liquid into an aerosol via electrostatic forces created between an emitter and a counter electrode. Herein, we present compact laboratory-made instrumentation for nanospray-processing of silver colloid. The instrumentation is based on the pressurized polysulfone chamber fixing a disposable vial with an immersed platinum electrode and a long fused silica capillary supplying the sprayed liquid to the emitter. The combination of low flow rates (70 nL/min) with a sharp emitter, fabricated on a 3D printed grinding station, resulted in a fine aerosol. The low volume of released droplets allowed full evaporation of water during their flight towards the counter electrode without any need for drying gas or the addition of volatile solvents. The constructed device was successfully used for the deposition of water-free silver colloid without any requirement of its pretreatment. The deposition of completely dried nanoparticles on planar substrates eliminated undesirable coffee ring effect and deposits of increased homogeneity could be obtained. Electron microscopy confirmed no significant changes in the character of nanospray-processed nanoparticles. Finally, we also investigated several approaches for the improvement of the surface density of nanoparticles on the substrate at preserved time scale.
Permanent Link: http://hdl.handle.net/11104/0320976