Thermally tunable VO2-SiO2 nanocomposite thin-film capacitors
Abstract
We present a study of co-sputtered VO2-SiO2 nanocomposite dielectric thin-film media possessing continuous temperature tunability of the dielectric constant. The smooth thermal tunability is a result of the insulator-metal transition in the VO2 inclusions dispersed within an insulating matrix. We present a detailed comparison of the dielectric characteristics of this nanocomposite with those of a VO2 control layer and of VO2/SiO2 laminate multilayers of comparable overall thickness. We demonstrated a nanocomposite capacitor that has a thermal capacitance tunability of ∼60% between 25 °C and 100 °C at 1 MHz, with low leakage current. Such thermally tunable capacitors could find potential use in applications such as sensing, thermal cloaks, and phase-change energy storage devices.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Mar 19, 2018
- Source ID
- 10.1063/1.5011641
Entities
People
- Amy Duwel
- Chenghao Wan
- Doug White
- Haiyan Wang
- K. V. L. V. Narayanachari
- Kayla A Cooley
- Mikhail A Kats
- Shriram Ramanathan
- Suzanne E Mohney
- Xing Sun
- Yifei Sun
Organizations
- Charles Stark Draper Laboratory
- National Science Foundation
- Office of Naval Research
- Pennsylvania State University
- Purdue University
- University of Wisconsin–Madison