Metal-Insulator Transition and Size Dependent Electrical Percolation in Onion-Like Carbon/Polydimethylsiloxane Composites | Sciact - CRIS-system of Boreskov Institute of Catalysis

Metal-Insulator Transition and Size Dependent Electrical Percolation in Onion-Like Carbon/Polydimethylsiloxane Composites Full article

Journal

Journal of Applied Physics
ISSN: 0021-8979 , E-ISSN: 1089-7550

Output data

Year: 2014, Volume: 115, Number: 21, Pages: 213702-1-213702-9 Pages count : 9 DOI: 10.1063/1.4880995

Tags

Electron tunneling; Percolation (computer storage); Percolation (fluids); Semiconductor insulator boundaries; Silicones; Solvents

Authors

Macutkevic J. ¹ , Kranauskaite I. ¹ , Banys J. ¹ , Moseenkov S. ² , Kuznetsov V. ^2,3 , Shenderova O. ⁴

Affiliations

1	Vilnius, Sauletekio al. 9, LT-00122 Vilnius, Lithuania
2	Boreskov Institute of Catalysis SB RAS, Lavrentiev Ave. 5, Novosibirsk 630090, Russia
3	National Tomsk State University, Tomsk, Russia
4	International Technology Center, Raleigh, North Carolina 27715, USA

Funding (1)

European Commission

Dielectric/electric properties of onion-like carbon (OLC)/polydimethylsiloxane composites were investigated over very wide frequency (20 Hz–3 THz) and temperature (26–500 K) ranges. The percolation threshold in these composites strongly dependents on the OLC aggregate sizes and was lowest for the composites with the smallest OLC aggregate sizes (∼40 nm). Interestingly, the transition into the insulator state of the composites occurred at higher temperatures. The transition temperature increases with OLC aggregate concentration. Above the percolation threshold, the electrical conductivity in the composites occurs mainly due to electron tunneling between OLC clusters and quasi-one-dimensional hopping inside the clusters. The hopping almost vanishes at frequencies above 100 GHz where the phonon contribution dominates.

Macutkevic J. , Kranauskaite I. , Banys J. , Moseenkov S. , Kuznetsov V. , Shenderova O.
Metal-Insulator Transition and Size Dependent Electrical Percolation in Onion-Like Carbon/Polydimethylsiloxane Composites
Journal of Applied Physics. 2014. V.115. N21. P.213702-1-213702-9. DOI: 10.1063/1.4880995 WOS Scopus РИНЦ ANCAN OpenAlex

Submitted:	Mar 25, 2014
Accepted:	May 20, 2014
Published online:	Jun 2, 2014
Published print:	Jun 7, 2014

Web of science:	WOS:000337161600028
Scopus:	2-s2.0-84902590076
Elibrary:	24059998
Chemical Abstracts:	2013:1705610
Chemical Abstracts (print):	159:736548
OpenAlex:	W1991577504

DB	Citing
Web of science	24
Scopus	26
Elibrary	25
OpenAlex	27