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Assembly of a Versatile Micro Dispenser Using Off-The-Shelf Components for Applications in Microfluidics

Published online by Cambridge University Press:  21 November 2014

Harjyot Mohar ,
Annie O ,
Steven Jimenez ,
Leonel Munoz ,
Victor Hernandez ,
Arturo Estrada ,
Sewan Fan  and
Laura Fatuzzo
Harjyot Mohar
Affiliation:
Department of Physics, Hartnell College 411 Central Ave, Salinas, CA 93901
Annie O
Affiliation:
Department of Physics, Hartnell College 411 Central Ave, Salinas, CA 93901
Steven Jimenez
Affiliation:
Department of Physics, Hartnell College 411 Central Ave, Salinas, CA 93901
Leonel Munoz
Affiliation:
Department of Physics, Hartnell College 411 Central Ave, Salinas, CA 93901
Victor Hernandez
Affiliation:
Department of Physics, Hartnell College 411 Central Ave, Salinas, CA 93901
Arturo Estrada
Affiliation:
Department of Physics, Hartnell College 411 Central Ave, Salinas, CA 93901
Sewan Fan
Affiliation:
Department of Physics, Hartnell College 411 Central Ave, Salinas, CA 93901
Laura Fatuzzo
Affiliation:
Department of Physics, Hartnell College 411 Central Ave, Salinas, CA 93901
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Abstract

We designed and constructed a drop-on-demand (DOD) droplet dispenser using the piezo inkjet technique that is simple to construct and operate and makes use of readily available components. The droplet dispenser can be easily fitted with cost effective glass nozzles and can be readily tuned to produce consistent drop sizes. The dynamics of the droplet motion are obtained using a calibrated analog video imaging system. We observed very high accelerations for the ejected droplets that corroborate with the applied drive pulse amplitudes. The acceleration measured, near the ejection nozzle, was many times the acceleration of gravity with the largest value of 34g’s. We successfully dispensed glycol water solutions and aqueous suspensions of titanium oxide nanoparticles, with values greater than 10 in the measured pH. For the inkjet droplets deposited on smooth gold/chromium substrates (±3nm surface roughness variation), we observed the well-known coffee ring effect using optical microscopy and nanoparticle morphology using an atomic force microscope.

Keywords

ink-jet printingcolloidTi
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1686: Symposium V – Micro- and Nanofluidic Systems for Materials Synthesis, Device Assembly and Bioanalysis , 2014 , mrss14-1686-v03-10
Copyright
Copyright © Materials Research Society 2014 

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