Pen plotter printing of Co3O4 thin films: features of the microstructure, optical, electrophysical and gas-sensing properties

Microplotter-Printed On-Chip Combinatorial Library of Ink-Derived Multiple Metal Oxides as an “Electronic Olfaction” Unit

“…We employed a spectrum of eight materials of varied nature to base on p- and n- type conductivity, which have been confirmed in the literature to be a solid platform for chemiresistive gas sensors. ,, Some thin-film oxides included in the designed combinatorial library were previously studied with respect to their synthesis under the sol–gel approach from hydrolytically active complexes of the metal alkoxoacetylacetonates. − To prepare inks, we utilized the following chemicals: custom-prepared acetylacetonates of manganese, cerium, zirconium, zinc, chromium, cobalt, and tin, titanium­(IV) n -butoxide (99%), acetylacetone (98%), and n -butanol (99%) of analytical grade. Hydrolytically active heteroligand precursors of [M­(C 5 H 7 O 2 ) x (C 4 H 9 O) y ] composition where M represents cations of Mn, Ce, Zr, Zn, Cr, Co, and Sn were synthesized by heat treatment of the solutions of corresponding metal acetylacetonates in n -butanol, c = 0.2 M, in accordance with earlier developed protocols. , Such a thermal treatment results in partial destructive substitution of the chelating ligand by alkoxy fragments, which both reduce a degree of screening of central atoms and enhance the material’s reactivity toward water molecules.…”

Obtaining of ZnO/Fe2O3 Thin Nanostructured Films by AACVD for Detection of ppb-Concentrations of NO2 as a Biomarker of Lung Infections

“…To maintain constant conditions of aerosol formation, flow-through water cooling of the ultrasonic generator was performed. Aerosol deposition was performed in a flow furnace chamber on various substrates (glass, aluminum oxide, and an Al 2 O 3 sensor with platinum counter-pin electrodes and a microheater on the reverse side [ 40 ]) at a decomposition temperature of 400 °C. Nitrogen (high purity grade “6.0”) was used as a carrier gas, with a flow rate of 300 mL/min.…”

Microextrusion Printing of Hierarchically Structured Thick V2O5 Film with Independent from Humidity Sensing Response to Benzene

“…These things considered, all the above-mentioned approaches possess drawbacks upon deposition of films with areas of different composition or properties, which can be necessary for the preparation of sensitive gas sensors of “electronic olfaction” unit type [ 37 ] or multicolor electrochromic displays: in order to obtain such films by using the enumerated techniques, masking a part of the surface is required, which constitutes an additional step that makes the deposition process more complicated and potentially influences the properties of already deposited oxides. Printing technologies, such as pen plotter [ 38 , 39 ], ink-jet [ 40 , 41 , 42 ], microplotter [ 37 ], and aerosol [ 43 ], allow avoiding this drawback while possessing simplicity and potential for combination with various synthesis approaches, such as sol-gel technology [ 37 , 41 ], hydrothermal synthesis [ 44 , 45 ], etc. In addition to the already mentioned printing techniques, there is a number of others, among which we dedicate special attention to microextrusion printing [ 46 , 47 , 48 , 49 ].…”