Particle Fabrication Using Inkjet Printing onto Hydrophobic Surfaces for Optimization and Calibration of Trace Contraband Detection Sensors
| Autor: | Tim Barr, Scott A. Wight, Marlon L. Walker, Jennifer R. Verkouteren, Marcela N. Najarro, Eric S. Windsor, Matthew E. Staymates, Aaron Urbas, Greg Gillen |
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| Rok vydání: | 2015 |
| Předmět: |
Silicon
Fabrication Materials science Particle number Dispersity Evaporation Nanotechnology Substrate (printing) engineering.material Spectrum Analysis Raman lcsh:Chemical technology Biochemistry Article Analytical Chemistry hydrophobic silicon trace detection Micrometre Coating Image Processing Computer-Assisted lcsh:TP1-1185 Electrical and Electronic Engineering Instrumentation inkjet printing Nitrates sample preparation technology industry and agriculture Atomic and Molecular Physics and Optics Chemical engineering engineering Printing Particle particle fabrication drop-on-demand Hydrophobic and Hydrophilic Interactions |
| Zdroj: | Sensors, Vol 15, Iss 11, Pp 29618-29634 (2015) Sensors (Basel, Switzerland) Sensors Volume 15 Issue 11 Pages 29618-29634 |
| ISSN: | 1424-8220 |
| Popis: | A method has been developed to fabricate patterned arrays of micrometer-sized monodisperse solid particles of ammonium nitrate on hydrophobic silicon surfaces using inkjet printing. The method relies on dispensing one or more microdrops of a concentrated aqueous ammonium nitrate solution from a drop-on-demand (DOD) inkjet printer at specific locations on a silicon substrate rendered hydrophobic by a perfluorodecytrichlorosilane monolayer coating. The deposited liquid droplets form into the shape of a spherical shaped cap during the evaporation process, a deposited liquid droplet maintains this geometry until it forms a solid micrometer sized particle. Arrays of solid particles are obtained by sequential translation of the printer stage. The use of DOD inkjet printing for fabrication of discrete particle arrays allows for precise control of particle characteristics (mass, diameter and height), as well as the particle number and spatial distribution on the substrate. The final mass of an individual particle is precisely determined by using gravimetric measurement of the average mass of solution ejected per microdrop. The primary application of this method is fabrication of test materials for the evaluation of spatially-resolved optical and mass spectrometry based sensors used for detecting particle residues of contraband materials, such as explosives or narcotics. |
| Databáze: | OpenAIRE |
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