Control of interfaces on electrical properties of SiO2-Parylene-C laminar composite dielectrics

Pratyush Tewari; Ramakrishnan Rajagopalan; Eugene Furman; Michael T. Lanagan

doi:10.1016/j.jcis.2008.12.060

Control of interfaces on electrical properties of SiO₂-Parylene-C laminar composite dielectrics

Pratyush Tewari, Ramakrishnan Rajagopalan, Eugene Furman, Michael T. Lanagan

Research output: Contribution to journal › Article › peer-review

19 Scopus citations

Abstract

The interfacial interactions and their effects on electrical properties are reported for thermally grown SiO₂-Parylene-C laminar composites. The segmental chain mobility of the interfacial Parylene-C was found to be enhanced in the composites. TSDC (thermally stimulated depolarization current) measurements showed the presence of dipolar interfacial energy states in these laminar composites. Functionalization of the oxide surface with 3-aminopropyltriethoxysilane (APTES) created dipolar energy states with larger activation energy at the interface between Parylene-C and SiO₂. In addition to the modification of interfacial states, incorporation of APTES interfacial layer also increased polarizability (real part of permittivity) and reduced the quasi-DC conductivity of laminar composites. The systematic changes in interfacial characteristics with thickness of APTES layer were explained based on structural orientation and cross linking of silane molecules.

Original language	English (US)
Pages (from-to)	65-73
Number of pages	9
Journal	Journal of Colloid And Interface Science
Volume	332
Issue number	1
DOIs	https://doi.org/10.1016/j.jcis.2008.12.060
State	Published - Apr 1 2009

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Biomaterials
Surfaces, Coatings and Films
Colloid and Surface Chemistry

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10.1016/j.jcis.2008.12.060

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title = "Control of interfaces on electrical properties of SiO2-Parylene-C laminar composite dielectrics",

abstract = "The interfacial interactions and their effects on electrical properties are reported for thermally grown SiO2-Parylene-C laminar composites. The segmental chain mobility of the interfacial Parylene-C was found to be enhanced in the composites. TSDC (thermally stimulated depolarization current) measurements showed the presence of dipolar interfacial energy states in these laminar composites. Functionalization of the oxide surface with 3-aminopropyltriethoxysilane (APTES) created dipolar energy states with larger activation energy at the interface between Parylene-C and SiO2. In addition to the modification of interfacial states, incorporation of APTES interfacial layer also increased polarizability (real part of permittivity) and reduced the quasi-DC conductivity of laminar composites. The systematic changes in interfacial characteristics with thickness of APTES layer were explained based on structural orientation and cross linking of silane molecules.",

author = "Pratyush Tewari and Ramakrishnan Rajagopalan and Eugene Furman and Lanagan, {Michael T.}",

note = "Funding Information: The authors would like to thank Jeff Long and Paul Moses for help in electrical characterization. The authors would also like to thank Dr. Nadine Smith and Gene Gerber for the use of their Parylene deposition system. The Office of Naval Research sponsored this work under grant N00014-05-1-0541. ",

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AU - Tewari, Pratyush

AU - Rajagopalan, Ramakrishnan

AU - Furman, Eugene

AU - Lanagan, Michael T.

N1 - Funding Information: The authors would like to thank Jeff Long and Paul Moses for help in electrical characterization. The authors would also like to thank Dr. Nadine Smith and Gene Gerber for the use of their Parylene deposition system. The Office of Naval Research sponsored this work under grant N00014-05-1-0541.

PY - 2009/4/1

Y1 - 2009/4/1

N2 - The interfacial interactions and their effects on electrical properties are reported for thermally grown SiO2-Parylene-C laminar composites. The segmental chain mobility of the interfacial Parylene-C was found to be enhanced in the composites. TSDC (thermally stimulated depolarization current) measurements showed the presence of dipolar interfacial energy states in these laminar composites. Functionalization of the oxide surface with 3-aminopropyltriethoxysilane (APTES) created dipolar energy states with larger activation energy at the interface between Parylene-C and SiO2. In addition to the modification of interfacial states, incorporation of APTES interfacial layer also increased polarizability (real part of permittivity) and reduced the quasi-DC conductivity of laminar composites. The systematic changes in interfacial characteristics with thickness of APTES layer were explained based on structural orientation and cross linking of silane molecules.

AB - The interfacial interactions and their effects on electrical properties are reported for thermally grown SiO2-Parylene-C laminar composites. The segmental chain mobility of the interfacial Parylene-C was found to be enhanced in the composites. TSDC (thermally stimulated depolarization current) measurements showed the presence of dipolar interfacial energy states in these laminar composites. Functionalization of the oxide surface with 3-aminopropyltriethoxysilane (APTES) created dipolar energy states with larger activation energy at the interface between Parylene-C and SiO2. In addition to the modification of interfacial states, incorporation of APTES interfacial layer also increased polarizability (real part of permittivity) and reduced the quasi-DC conductivity of laminar composites. The systematic changes in interfacial characteristics with thickness of APTES layer were explained based on structural orientation and cross linking of silane molecules.

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Control of interfaces on electrical properties of SiO₂-Parylene-C laminar composite dielectrics

Abstract

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