2 research outputs found
Influence of the Dielectric Matrix on the Electrical Nanocomposites Based on Oxidized Multi-Walled Carbon Nanotubes
Π Π΄Π°Π½Π½ΠΎΠΉ ΡΠ°Π±ΠΎΡΠ΅ ΡΠ°ΡΡΠΌΠΎΡΡΠ΅Π½ΠΎ Π²Π»ΠΈΡΠ½ΠΈΠ΅ ΠΎΠΊΠΈΡΠ»ΠΈΡΠ΅Π»ΡΠ½ΡΡ
ΠΎΠ±ΡΠ°Π±ΠΎΡΠΎΠΊ Π½Π° ΡΠ²ΠΎΠΉΡΡΠ²Π° ΠΌΠ½ΠΎΠ³ΠΎΡΠ»ΠΎΠΉΠ½ΡΡ
ΡΠ³Π»Π΅ΡΠΎΠ΄Π½ΡΡ
Π½Π°Π½ΠΎΡΡΡΠ±ΠΎΠΊ (ΠΠ£ΠΠ’). Π Π°ΡΡΠΌΠΎΡΡΠ΅Π½Ρ ΡΠΊΡΠΏΠ΅ΡΠΈΠΌΠ΅Π½ΡΠ°Π»ΡΠ½ΡΠ΅ ΡΠ΅ΠΌΠΏΠ΅ΡΠ°ΡΡΡΠ½ΡΠ΅ Π·Π°Π²ΠΈΡΠΈΠΌΠΎΡΡΠΈ
ΡΠ»Π΅ΠΊΡΡΠΎΠΏΡΠΎΠ²ΠΎΠ΄Π½ΠΎΡΡΠΈ (Π² Π΄ΠΈΠ°ΠΏΠ°Π·ΠΎΠ½Π΅ ΡΠ΅ΠΌΠΏΠ΅ΡΠ°ΡΡΡ 4,2-293 Π) ΠΈ ΠΏΠΎΠ»Π΅Π²ΡΠ΅ Π·Π°Π²ΠΈΡΠΈΠΌΠΎΡΡΠΈ ΠΌΠ°Π³Π½Π΅ΡΠΎΡΠΎΠΏΡΠΎΡΠΈΠ²Π»Π΅Π½ΠΈΡ (Π² ΠΏΠΎΠ»ΡΡ
Π΄ΠΎ 9 Π’Π» ΠΏΡΠΈ ΡΠ΅ΠΌΠΏΠ΅ΡΠ°ΡΡΡΠ΅ 10 Π) ΠΎΠ±ΡΠ°Π·ΡΠΎΠ² ΠΠ£ΠΠ’ Ρ ΠΌΠΎΠ΄ΠΈΡΠΈΡΠΈΡΠΎΠ²Π°Π½Π½ΡΠΌΠΈ ΠΎΠΊΠΈΡΠ»Π΅Π½ΠΈΠ΅ΠΌ ΠΏΠΎΠ²Π΅ΡΡ
Π½ΠΎΡΡΠ½ΡΠΌΠΈ ΡΠ»ΠΎΡΠΌΠΈ, Π° ΡΠ°ΠΊΠΆΠ΅ ΠΊΠΎΠΌΠΏΠΎΠ·ΠΈΡΠΎΠ² Π½Π° ΠΈΡ
ΠΎΡΠ½ΠΎΠ²Π΅. Π£ΡΡΠ°Π½ΠΎΠ²Π»Π΅Π½ΠΎ, ΡΡΠΎ ΠΎΠΊΠΈΡΠ»Π΅Π½ΠΈΠ΅
ΠΏΠΎΠ²Π΅ΡΡ
Π½ΠΎΡΡΠ½ΡΡ
ΡΠ»ΠΎΠ΅Π² ΠΠ£ΠΠ’ Π² ΡΠ°ΡΡΠ²ΠΎΡΠ°Ρ
ΠΊΠΈΡΠ»ΠΎΡ Π²Π΅Π΄Π΅Ρ ΠΊ ΠΈΠ·ΠΌΠ΅Π½Π΅Π½ΠΈΡ ΡΠ΅ΠΌΠΏΠ΅ΡΠ°ΡΡΡΠ½ΡΡ
Π·Π°Π²ΠΈΡΠΈΠΌΠΎΡΡΠ΅ΠΉ ΡΠ»Π΅ΠΊΡΡΠΎΠΏΡΠΎΠ²ΠΎΠ΄Π½ΠΎΡΡΠΈ. ΠΠ²Π΅Π΄Π΅Π½ΠΈΠ΅ ΠΠ£ΠΠ’ Π² Π΄ΠΈΡΠ»Π΅ΠΊΡΡΠΈΡΠ΅ΡΠΊΡΡ ΠΌΠ°ΡΡΠΈΡΡ ΠΏΠΎΠ»ΠΈΠΌΠ΅ΡΠΈΠ»ΠΌΠ΅ΡΠ°ΠΊΡΠΈΠ»Π°ΡΠ° (ΠΠΠΠ) ΠΏΡΠΈΠ²ΠΎΠ΄ΠΈΡ ΠΊ ΡΠ΅ΠΌΠΏΠ΅ΡΠ°ΡΡΡΠ½ΠΎΠΉ Π·Π°Π²ΠΈΡΠΈΠΌΠΎΡΡΠΈ ΠΏΡΠΎΠ²ΠΎΠ΄ΠΈΠΌΠΎΡΡΠΈ, Π±Π»ΠΈΠ·ΠΊΠΎΠΉ ΠΊ ΡΠΈΠΏΠΈΡΠ½ΠΎΠΉ Π΄Π»Ρ
ΠΏΡΡΠΆΠΊΠΎΠ²ΠΎΠΉ ΠΏΡΠΎΠ²ΠΎΠ΄ΠΈΠΌΠΎΡΡΠΈ Ρ ΠΏΠ΅ΡΠ΅ΠΌΠ΅Π½Π½ΠΎΠΉ Π΄Π»ΠΈΠ½ΠΎΠΉ ΠΏΡΡΠΆΠΊΠ° Π΄Π»Ρ ΡΡΠ΅Ρ
ΠΌΠ΅ΡΠ½ΠΎΠ³ΠΎ ΡΠ»ΡΡΠ°Ρ.In this paper we consider the effect of oxidative treatments on the properties of multiwalled carbon nan-
otubes (MWNT). The experimental temperature dependence of electrical conductivity (in the temperature
range 4,2-293 K) and field dependence of magnetoresistance (in fields up to 9 Tl at 10 K) of the samples
with MWCNT modified by oxidation of the surface layers, as well as the composites based on them. It
was established that the oxidation of the surface layers of MWCNTs in acid solutions leads to a change
in the temperature dependence of electrical conductivity. Introduction of MWCNTs in a dielectric matrix
of polymethylmethacrylate (PMMA) leads to the dependence of the conductivity close to that typical for
hopping conductivity with variable hopping length, three-dimensional case
Influence of the Dielectric Matrix on the Electrical Nanocomposites Based on Oxidized Multi-Walled Carbon Nanotubes
Π Π΄Π°Π½Π½ΠΎΠΉ ΡΠ°Π±ΠΎΡΠ΅ ΡΠ°ΡΡΠΌΠΎΡΡΠ΅Π½ΠΎ Π²Π»ΠΈΡΠ½ΠΈΠ΅ ΠΎΠΊΠΈΡΠ»ΠΈΡΠ΅Π»ΡΠ½ΡΡ
ΠΎΠ±ΡΠ°Π±ΠΎΡΠΎΠΊ Π½Π° ΡΠ²ΠΎΠΉΡΡΠ²Π° ΠΌΠ½ΠΎΠ³ΠΎΡΠ»ΠΎΠΉΠ½ΡΡ
ΡΠ³Π»Π΅ΡΠΎΠ΄Π½ΡΡ
Π½Π°Π½ΠΎΡΡΡΠ±ΠΎΠΊ (ΠΠ£ΠΠ’). Π Π°ΡΡΠΌΠΎΡΡΠ΅Π½Ρ ΡΠΊΡΠΏΠ΅ΡΠΈΠΌΠ΅Π½ΡΠ°Π»ΡΠ½ΡΠ΅ ΡΠ΅ΠΌΠΏΠ΅ΡΠ°ΡΡΡΠ½ΡΠ΅ Π·Π°Π²ΠΈΡΠΈΠΌΠΎΡΡΠΈ
ΡΠ»Π΅ΠΊΡΡΠΎΠΏΡΠΎΠ²ΠΎΠ΄Π½ΠΎΡΡΠΈ (Π² Π΄ΠΈΠ°ΠΏΠ°Π·ΠΎΠ½Π΅ ΡΠ΅ΠΌΠΏΠ΅ΡΠ°ΡΡΡ 4,2-293 Π) ΠΈ ΠΏΠΎΠ»Π΅Π²ΡΠ΅ Π·Π°Π²ΠΈΡΠΈΠΌΠΎΡΡΠΈ ΠΌΠ°Π³Π½Π΅ΡΠΎΡΠΎΠΏΡΠΎΡΠΈΠ²Π»Π΅Π½ΠΈΡ (Π² ΠΏΠΎΠ»ΡΡ
Π΄ΠΎ 9 Π’Π» ΠΏΡΠΈ ΡΠ΅ΠΌΠΏΠ΅ΡΠ°ΡΡΡΠ΅ 10 Π) ΠΎΠ±ΡΠ°Π·ΡΠΎΠ² ΠΠ£ΠΠ’ Ρ ΠΌΠΎΠ΄ΠΈΡΠΈΡΠΈΡΠΎΠ²Π°Π½Π½ΡΠΌΠΈ ΠΎΠΊΠΈΡΠ»Π΅Π½ΠΈΠ΅ΠΌ ΠΏΠΎΠ²Π΅ΡΡ
Π½ΠΎΡΡΠ½ΡΠΌΠΈ ΡΠ»ΠΎΡΠΌΠΈ, Π° ΡΠ°ΠΊΠΆΠ΅ ΠΊΠΎΠΌΠΏΠΎΠ·ΠΈΡΠΎΠ² Π½Π° ΠΈΡ
ΠΎΡΠ½ΠΎΠ²Π΅. Π£ΡΡΠ°Π½ΠΎΠ²Π»Π΅Π½ΠΎ, ΡΡΠΎ ΠΎΠΊΠΈΡΠ»Π΅Π½ΠΈΠ΅
ΠΏΠΎΠ²Π΅ΡΡ
Π½ΠΎΡΡΠ½ΡΡ
ΡΠ»ΠΎΠ΅Π² ΠΠ£ΠΠ’ Π² ΡΠ°ΡΡΠ²ΠΎΡΠ°Ρ
ΠΊΠΈΡΠ»ΠΎΡ Π²Π΅Π΄Π΅Ρ ΠΊ ΠΈΠ·ΠΌΠ΅Π½Π΅Π½ΠΈΡ ΡΠ΅ΠΌΠΏΠ΅ΡΠ°ΡΡΡΠ½ΡΡ
Π·Π°Π²ΠΈΡΠΈΠΌΠΎΡΡΠ΅ΠΉ ΡΠ»Π΅ΠΊΡΡΠΎΠΏΡΠΎΠ²ΠΎΠ΄Π½ΠΎΡΡΠΈ. ΠΠ²Π΅Π΄Π΅Π½ΠΈΠ΅ ΠΠ£ΠΠ’ Π² Π΄ΠΈΡΠ»Π΅ΠΊΡΡΠΈΡΠ΅ΡΠΊΡΡ ΠΌΠ°ΡΡΠΈΡΡ ΠΏΠΎΠ»ΠΈΠΌΠ΅ΡΠΈΠ»ΠΌΠ΅ΡΠ°ΠΊΡΠΈΠ»Π°ΡΠ° (ΠΠΠΠ) ΠΏΡΠΈΠ²ΠΎΠ΄ΠΈΡ ΠΊ ΡΠ΅ΠΌΠΏΠ΅ΡΠ°ΡΡΡΠ½ΠΎΠΉ Π·Π°Π²ΠΈΡΠΈΠΌΠΎΡΡΠΈ ΠΏΡΠΎΠ²ΠΎΠ΄ΠΈΠΌΠΎΡΡΠΈ, Π±Π»ΠΈΠ·ΠΊΠΎΠΉ ΠΊ ΡΠΈΠΏΠΈΡΠ½ΠΎΠΉ Π΄Π»Ρ
ΠΏΡΡΠΆΠΊΠΎΠ²ΠΎΠΉ ΠΏΡΠΎΠ²ΠΎΠ΄ΠΈΠΌΠΎΡΡΠΈ Ρ ΠΏΠ΅ΡΠ΅ΠΌΠ΅Π½Π½ΠΎΠΉ Π΄Π»ΠΈΠ½ΠΎΠΉ ΠΏΡΡΠΆΠΊΠ° Π΄Π»Ρ ΡΡΠ΅Ρ
ΠΌΠ΅ΡΠ½ΠΎΠ³ΠΎ ΡΠ»ΡΡΠ°Ρ.In this paper we consider the effect of oxidative treatments on the properties of multiwalled carbon nan-
otubes (MWNT). The experimental temperature dependence of electrical conductivity (in the temperature
range 4,2-293 K) and field dependence of magnetoresistance (in fields up to 9 Tl at 10 K) of the samples
with MWCNT modified by oxidation of the surface layers, as well as the composites based on them. It
was established that the oxidation of the surface layers of MWCNTs in acid solutions leads to a change
in the temperature dependence of electrical conductivity. Introduction of MWCNTs in a dielectric matrix
of polymethylmethacrylate (PMMA) leads to the dependence of the conductivity close to that typical for
hopping conductivity with variable hopping length, three-dimensional case