2010
DOI: 10.1016/j.snb.2010.07.023
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Nanocomposite of cobalt oxide nanocrystals and single-walled carbon nanotubes for a gas sensor application

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Cited by 72 publications
(21 citation statements)
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“…When the particles' size were twice than depletion region, the depleted regions start to overlap and consequently the electrical properties are predominantly determined by surface states [43]. When the size of the Co 3 O 4 particle is less than 10 nm, the depletion region can be extended into the CNTs [44]. As shown in TEM images, the PCNTs joined with Co 3 O 4 semiconductor based sensor not only prevent Co 3 O 4 nanoparticles from aggregation, but also can boost the electron transfer efficiency.…”
Section: Discussion Of Sensing Mechanismmentioning
confidence: 99%
“…When the particles' size were twice than depletion region, the depleted regions start to overlap and consequently the electrical properties are predominantly determined by surface states [43]. When the size of the Co 3 O 4 particle is less than 10 nm, the depletion region can be extended into the CNTs [44]. As shown in TEM images, the PCNTs joined with Co 3 O 4 semiconductor based sensor not only prevent Co 3 O 4 nanoparticles from aggregation, but also can boost the electron transfer efficiency.…”
Section: Discussion Of Sensing Mechanismmentioning
confidence: 99%
“…Nanocomposite structures of cobalt oxide (Co 3 O 4 ) and SWCNTs were prepared using a polymer assisted deposition (PAD) method [61]. For this, polyethyleneimine (PEI) was the polymer used to bind the cobalt ions from and adjust the viscosity of the solution during the deposition process in order to get a homogeneous distribution of the particles on the SWCNTs thin film.…”
Section: Nanostructured Oxides Mixed With Cntsmentioning
confidence: 99%
“…Possui uma estrutura única, e devido as suas ligações covalentes sp 2 , é considerado o material mais rígido e forte já conhecido (Hou et al, 2008;Linga et al, 2014). Por estas características apresenta grande potencial para ser utilizado como fase reforço em compósitos poliméricos, podendo ser aplicados nas áreas química (Jiang et al, 2014), física (Olneya et al, 2014), médica (Hashida et al, 2014), aeroespacial (Gohardan et al, 2012, automotiva (Presting e Koning, 2003), eletrônica (Li et al, 2010), dentre outras.…”
Section: Introductionunclassified
“…Possui uma estrutura única, e devido as suas ligações covalentes sp 2 , é considerado o material mais rígido e forte já conhecido (Hou et al, 2008;Linga et al, 2014). Por estas características apresenta grande potencial para ser utilizado como fase reforço em compósitos poliméricos, podendo ser aplicados nas áreas química (Jiang et al, 2014), física (Olneya et al, 2014), médica (Hashida et al, 2014), aeroespacial (Gohardan et al, 2012, automotiva (Presting e Koning, 2003), eletrônica (Li et al, 2010), dentre outras.No entanto, para se alcançar um efetivo papel de reforço nos compósitos, dois aspectos devem ser levados em consideração: (i) a quantidade de nanotubo utilizada e (ii) sua homogênea dispersão na matriz polimérica. (i) Adicionando pouco nanotubo de carbono, ele não faz o papel de reforço no compósito, e em grandes quantidades, os nanotubos se aglomeram dificultando a transferência de carga da interface CNT/polímero.…”
unclassified