Tunable Low Crystallinity Carbon Nanotubes/Silicon Schottky Junction Arrays and Their Potential Application for Gas Sensing

Highly ordered nanostructure arrays have attracted wide attention due to their wide range of applicability, particularly in fabricating devices containing scalable and controllable junctions. In this work, highly ordered carbon nanotube (CNT) arrays grown directly on Si substrates were fabricated, a...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Alvaro R. Adrian, Daniel Cerda, Leunam Fernández-Izquierdo, Rodrigo A. Segura, José Antonio García-Merino, Samuel A. Hevia
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	low crystallinity carbon nanotubes anodic aluminum oxide electric transport gas sensor Schottky junction arrays Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/9818928378fd40f89c02c8286a90a593
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:9818928378fd40f89c02c8286a90a593
record_format	dspace
spelling	oai:doaj.org-article:9818928378fd40f89c02c8286a90a5932021-11-25T18:31:55ZTunable Low Crystallinity Carbon Nanotubes/Silicon Schottky Junction Arrays and Their Potential Application for Gas Sensing10.3390/nano111130402079-4991https://doaj.org/article/9818928378fd40f89c02c8286a90a5932021-11-01T00:00:00Zhttps://www.mdpi.com/2079-4991/11/11/3040https://doaj.org/toc/2079-4991Highly ordered nanostructure arrays have attracted wide attention due to their wide range of applicability, particularly in fabricating devices containing scalable and controllable junctions. In this work, highly ordered carbon nanotube (CNT) arrays grown directly on Si substrates were fabricated, and their electronic transport properties as a function of wall thickness were explored. The CNTs were synthesized by chemical vapor deposition inside porous alumina membranes, previously fabricated on n-type Si substrates. The morphology of the CNTs, controlled by the synthesis parameters, was characterized by electron microscopies and Raman spectroscopy, revealing that CNTs exhibit low crystallinity (LC). A study of conductance as a function of temperature indicated that the dominant electric transport mechanism is the 3D variable range hopping. The electrical transport explored by I–V curves was approached by an equivalent circuit based on a Schottky diode and resistances related to the morphology of the nanotubes. These junction arrays can be applied in several fields, particularly in this work we explored their performance in gas sensing mode and found a fast and reliable resistive response at room temperature in devices containing LC-CNTs with wall thickness between 0.4 nm and 1.1 nm.Alvaro R. AdrianDaniel CerdaLeunam Fernández-IzquierdoRodrigo A. SeguraJosé Antonio García-MerinoSamuel A. HeviaMDPI AGarticlelow crystallinity carbon nanotubesanodic aluminum oxideelectric transportgas sensorSchottky junction arraysChemistryQD1-999ENNanomaterials, Vol 11, Iss 3040, p 3040 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	low crystallinity carbon nanotubes anodic aluminum oxide electric transport gas sensor Schottky junction arrays Chemistry QD1-999
spellingShingle	low crystallinity carbon nanotubes anodic aluminum oxide electric transport gas sensor Schottky junction arrays Chemistry QD1-999 Alvaro R. Adrian Daniel Cerda Leunam Fernández-Izquierdo Rodrigo A. Segura José Antonio García-Merino Samuel A. Hevia Tunable Low Crystallinity Carbon Nanotubes/Silicon Schottky Junction Arrays and Their Potential Application for Gas Sensing
description	Highly ordered nanostructure arrays have attracted wide attention due to their wide range of applicability, particularly in fabricating devices containing scalable and controllable junctions. In this work, highly ordered carbon nanotube (CNT) arrays grown directly on Si substrates were fabricated, and their electronic transport properties as a function of wall thickness were explored. The CNTs were synthesized by chemical vapor deposition inside porous alumina membranes, previously fabricated on n-type Si substrates. The morphology of the CNTs, controlled by the synthesis parameters, was characterized by electron microscopies and Raman spectroscopy, revealing that CNTs exhibit low crystallinity (LC). A study of conductance as a function of temperature indicated that the dominant electric transport mechanism is the 3D variable range hopping. The electrical transport explored by I–V curves was approached by an equivalent circuit based on a Schottky diode and resistances related to the morphology of the nanotubes. These junction arrays can be applied in several fields, particularly in this work we explored their performance in gas sensing mode and found a fast and reliable resistive response at room temperature in devices containing LC-CNTs with wall thickness between 0.4 nm and 1.1 nm.
format	article
author	Alvaro R. Adrian Daniel Cerda Leunam Fernández-Izquierdo Rodrigo A. Segura José Antonio García-Merino Samuel A. Hevia
author_facet	Alvaro R. Adrian Daniel Cerda Leunam Fernández-Izquierdo Rodrigo A. Segura José Antonio García-Merino Samuel A. Hevia
author_sort	Alvaro R. Adrian
title	Tunable Low Crystallinity Carbon Nanotubes/Silicon Schottky Junction Arrays and Their Potential Application for Gas Sensing
title_short	Tunable Low Crystallinity Carbon Nanotubes/Silicon Schottky Junction Arrays and Their Potential Application for Gas Sensing
title_full	Tunable Low Crystallinity Carbon Nanotubes/Silicon Schottky Junction Arrays and Their Potential Application for Gas Sensing
title_fullStr	Tunable Low Crystallinity Carbon Nanotubes/Silicon Schottky Junction Arrays and Their Potential Application for Gas Sensing
title_full_unstemmed	Tunable Low Crystallinity Carbon Nanotubes/Silicon Schottky Junction Arrays and Their Potential Application for Gas Sensing
title_sort	tunable low crystallinity carbon nanotubes/silicon schottky junction arrays and their potential application for gas sensing
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/9818928378fd40f89c02c8286a90a593
work_keys_str_mv	AT alvaroradrian tunablelowcrystallinitycarbonnanotubessiliconschottkyjunctionarraysandtheirpotentialapplicationforgassensing AT danielcerda tunablelowcrystallinitycarbonnanotubessiliconschottkyjunctionarraysandtheirpotentialapplicationforgassensing AT leunamfernandezizquierdo tunablelowcrystallinitycarbonnanotubessiliconschottkyjunctionarraysandtheirpotentialapplicationforgassensing AT rodrigoasegura tunablelowcrystallinitycarbonnanotubessiliconschottkyjunctionarraysandtheirpotentialapplicationforgassensing AT joseantoniogarciamerino tunablelowcrystallinitycarbonnanotubessiliconschottkyjunctionarraysandtheirpotentialapplicationforgassensing AT samuelahevia tunablelowcrystallinitycarbonnanotubessiliconschottkyjunctionarraysandtheirpotentialapplicationforgassensing
_version_	1718411033505169408

Tunable Low Crystallinity Carbon Nanotubes/Silicon Schottky Junction Arrays and Their Potential Application for Gas Sensing

Ejemplares similares