Electrospray mode transition of microdroplets with semiconductor nanoparticle suspension

Abstract Electrosprays operate in several modes depending on the flow rate and electric potential. This allows the deposition of droplets containing nanoparticles into discrete nanodot arrays to fabricate various electronic devices. In this study, seven different suspensions with varying properties...

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Autores principales:	Eduardo Castillo-Orozco, Aravinda Kar, Ranganathan Kumar
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/6b809935f9ed41ec83b024174f0540fd
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spelling	oai:doaj.org-article:6b809935f9ed41ec83b024174f0540fd2021-12-02T15:05:12ZElectrospray mode transition of microdroplets with semiconductor nanoparticle suspension10.1038/s41598-017-05175-62045-2322https://doaj.org/article/6b809935f9ed41ec83b024174f0540fd2017-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-05175-6https://doaj.org/toc/2045-2322Abstract Electrosprays operate in several modes depending on the flow rate and electric potential. This allows the deposition of droplets containing nanoparticles into discrete nanodot arrays to fabricate various electronic devices. In this study, seven different suspensions with varying properties were investigated. In the dripping mode, the normalized dropsize decreases linearly with electric capillary number, Ca e , (ratio of electric to surface tension forces) up to Ca e ≈ 1.0. The effect of viscous forces is found to be negligible in the dripping mode since the capillary number is small. For flow rates with low Reynolds number, the mode changes to microdripping mode, and then to a planar oscillating microdripping mode as Ca e increases. The normalized dropsize remains nearly constant at 0.07 for Ca e > 3.3. The microdripping mode which is important for depositing discrete array of nanodots is found to occur in the range, 2 ≤ Ca e ≤ 2.5. The droplet frequency increases steadily from dripping to microdripping mode, but stays roughly constant in the oscillating microdripping mode. This work provides a physical basis by which the flow rate and the voltage can be chosen for any nanosuspension to precisely operate in the microdripping mode at a predetermined dropsize and droplet frequency.Eduardo Castillo-OrozcoAravinda KarRanganathan KumarNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-10 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Eduardo Castillo-Orozco Aravinda Kar Ranganathan Kumar Electrospray mode transition of microdroplets with semiconductor nanoparticle suspension
description	Abstract Electrosprays operate in several modes depending on the flow rate and electric potential. This allows the deposition of droplets containing nanoparticles into discrete nanodot arrays to fabricate various electronic devices. In this study, seven different suspensions with varying properties were investigated. In the dripping mode, the normalized dropsize decreases linearly with electric capillary number, Ca e , (ratio of electric to surface tension forces) up to Ca e ≈ 1.0. The effect of viscous forces is found to be negligible in the dripping mode since the capillary number is small. For flow rates with low Reynolds number, the mode changes to microdripping mode, and then to a planar oscillating microdripping mode as Ca e increases. The normalized dropsize remains nearly constant at 0.07 for Ca e > 3.3. The microdripping mode which is important for depositing discrete array of nanodots is found to occur in the range, 2 ≤ Ca e ≤ 2.5. The droplet frequency increases steadily from dripping to microdripping mode, but stays roughly constant in the oscillating microdripping mode. This work provides a physical basis by which the flow rate and the voltage can be chosen for any nanosuspension to precisely operate in the microdripping mode at a predetermined dropsize and droplet frequency.
format	article
author	Eduardo Castillo-Orozco Aravinda Kar Ranganathan Kumar
author_facet	Eduardo Castillo-Orozco Aravinda Kar Ranganathan Kumar
author_sort	Eduardo Castillo-Orozco
title	Electrospray mode transition of microdroplets with semiconductor nanoparticle suspension
title_short	Electrospray mode transition of microdroplets with semiconductor nanoparticle suspension
title_full	Electrospray mode transition of microdroplets with semiconductor nanoparticle suspension
title_fullStr	Electrospray mode transition of microdroplets with semiconductor nanoparticle suspension
title_full_unstemmed	Electrospray mode transition of microdroplets with semiconductor nanoparticle suspension
title_sort	electrospray mode transition of microdroplets with semiconductor nanoparticle suspension
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/6b809935f9ed41ec83b024174f0540fd
work_keys_str_mv	AT eduardocastilloorozco electrospraymodetransitionofmicrodropletswithsemiconductornanoparticlesuspension AT aravindakar electrospraymodetransitionofmicrodropletswithsemiconductornanoparticlesuspension AT ranganathankumar electrospraymodetransitionofmicrodropletswithsemiconductornanoparticlesuspension
_version_	1718388894965170176

Electrospray mode transition of microdroplets with semiconductor nanoparticle suspension

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