2D-ice templated titanium oxide films as advanced conducting platforms for electrical stimulation

Directional freezing has been widely employed to prepare highly ordered three-dimensional (3D) porous assemblies. However, in this scenario, there is one concept that has not been extensively explored: by applying directional freezing to a nanoparticle (NP) dispersion supported on a substrate, two-d...

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Autores principales: Romeo, H.E., Trabadelo, F., Jobbágy, M., Parra, R.
Formato: JOUR
Materias:
Alumina substrates
Ceramic dispersion
Current amplitude
Directional freezing
Electrical stimulations
Patterned assembly
Structured films
Thermally induced
Alumina
Dispersions
Film preparation
Freezing
Oxide films
Substrates
Thermal gradients
Three dimensional
Titanium
Titanium oxides
Conductive films
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_20507534_v2_n15_p2806_Romeo
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling todo:paper_20507534_v2_n15_p2806_Romeo2023-10-03T16:38:50Z 2D-ice templated titanium oxide films as advanced conducting platforms for electrical stimulation Romeo, H.E. Trabadelo, F. Jobbágy, M. Parra, R. Alumina substrates Ceramic dispersion Current amplitude Directional freezing Electrical stimulations Patterned assembly Structured films Thermally induced Alumina Dispersions Film preparation Freezing Oxide films Substrates Thermal gradients Three dimensional Titanium Titanium oxides Conductive films Directional freezing has been widely employed to prepare highly ordered three-dimensional (3D) porous assemblies. However, in this scenario, there is one concept that has not been extensively explored: by applying directional freezing to a nanoparticle (NP) dispersion supported on a substrate, two-dimensionally (2D) patterned films may be produced. In this study, tunable 2D-patterning of TiO2-NP dispersions on alumina substrates is demonstrated. By imposing different temperature gradients throughout the ceramic dispersion coatings, both homogeneous (non-patterned) and highly aligned patterned topologies (consisting of parallel grooves) were produced. In the case of patterned films, the orientation of the grooves was modulated from those oriented along the freezing direction to those perpendicularly oriented to the temperature gradient. Thermally induced reduction of the prepared films led to electrically conducting titanium oxide Magnéli phases. The measured resistances were strongly dependent on the orientation of the aligned patterns. To demonstrate the possibility of employing these structured films as platforms for electrical stimulation-related applications, a stimulating electronic circuit was developed and connected to the prepared films. Charge-balanced biphasic stimulus pulses with tunable current amplitudes and frequencies were successfully delivered through the conducting 2D-patterned assemblies. This journal is © the Partner Organisations 2014. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_20507534_v2_n15_p2806_Romeo
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Alumina substrates
Ceramic dispersion
Current amplitude
Directional freezing
Electrical stimulations
Patterned assembly
Structured films
Thermally induced
Alumina
Dispersions
Film preparation
Freezing
Oxide films
Substrates
Thermal gradients
Three dimensional
Titanium
Titanium oxides
Conductive films
spellingShingle Alumina substrates
Ceramic dispersion
Current amplitude
Directional freezing
Electrical stimulations
Patterned assembly
Structured films
Thermally induced
Alumina
Dispersions
Film preparation
Freezing
Oxide films
Substrates
Thermal gradients
Three dimensional
Titanium
Titanium oxides
Conductive films
Romeo, H.E.
Trabadelo, F.
Jobbágy, M.
Parra, R.
2D-ice templated titanium oxide films as advanced conducting platforms for electrical stimulation
topic_facet Alumina substrates
Ceramic dispersion
Current amplitude
Directional freezing
Electrical stimulations
Patterned assembly
Structured films
Thermally induced
Alumina
Dispersions
Film preparation
Freezing
Oxide films
Substrates
Thermal gradients
Three dimensional
Titanium
Titanium oxides
Conductive films
description Directional freezing has been widely employed to prepare highly ordered three-dimensional (3D) porous assemblies. However, in this scenario, there is one concept that has not been extensively explored: by applying directional freezing to a nanoparticle (NP) dispersion supported on a substrate, two-dimensionally (2D) patterned films may be produced. In this study, tunable 2D-patterning of TiO2-NP dispersions on alumina substrates is demonstrated. By imposing different temperature gradients throughout the ceramic dispersion coatings, both homogeneous (non-patterned) and highly aligned patterned topologies (consisting of parallel grooves) were produced. In the case of patterned films, the orientation of the grooves was modulated from those oriented along the freezing direction to those perpendicularly oriented to the temperature gradient. Thermally induced reduction of the prepared films led to electrically conducting titanium oxide Magnéli phases. The measured resistances were strongly dependent on the orientation of the aligned patterns. To demonstrate the possibility of employing these structured films as platforms for electrical stimulation-related applications, a stimulating electronic circuit was developed and connected to the prepared films. Charge-balanced biphasic stimulus pulses with tunable current amplitudes and frequencies were successfully delivered through the conducting 2D-patterned assemblies. This journal is © the Partner Organisations 2014.
format JOUR
author Romeo, H.E.
Trabadelo, F.
Jobbágy, M.
Parra, R.
author_facet Romeo, H.E.
Trabadelo, F.
Jobbágy, M.
Parra, R.
author_sort Romeo, H.E.
title 2D-ice templated titanium oxide films as advanced conducting platforms for electrical stimulation
title_short 2D-ice templated titanium oxide films as advanced conducting platforms for electrical stimulation
title_full 2D-ice templated titanium oxide films as advanced conducting platforms for electrical stimulation
title_fullStr 2D-ice templated titanium oxide films as advanced conducting platforms for electrical stimulation
title_full_unstemmed 2D-ice templated titanium oxide films as advanced conducting platforms for electrical stimulation
title_sort 2d-ice templated titanium oxide films as advanced conducting platforms for electrical stimulation
url http://hdl.handle.net/20.500.12110/paper_20507534_v2_n15_p2806_Romeo
work_keys_str_mv AT romeohe 2dicetemplatedtitaniumoxidefilmsasadvancedconductingplatformsforelectricalstimulation
AT trabadelof 2dicetemplatedtitaniumoxidefilmsasadvancedconductingplatformsforelectricalstimulation
AT jobbagym 2dicetemplatedtitaniumoxidefilmsasadvancedconductingplatformsforelectricalstimulation
AT parrar 2dicetemplatedtitaniumoxidefilmsasadvancedconductingplatformsforelectricalstimulation
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