Physics

Permittivity

Electrode

Organic chemistry

Electrical conductor

Dielectric permittivity

Analytical Chemistry (journal)

Relative permittivity

Dielectric

Physical chemistry

Composite material

Chemistry

Metallurgy

Materials science

Condensed matter physics

Titanium dioxide

Rutile

Titanium

Capacitance

Chromatography

Optoelectronics

Doping

Scientific Reports

Conductive rutile TiO 2 has received considerable attention recently due to multiple applications. However, the permittivity in conductive, reduced or doped TiO 2 appears to cause controversy with reported values in the range 100–10,000. In this work, we propose a method for measurements of the permittivity in conductive, n-type TiO 2 that involves: (i) hydrogen ion-implantation to form a donor concentration peak at a known depth, and (ii) capacitance–voltage measurements for donor profiling. We cannot confirm the claims stating an extremely high permittivity of single crystalline TiO 2 . On the contrary, the permittivity of conductive, reduced single crystalline TiO 2 is similar to that of insulating TiO 2 established previously, with a Curie–Weiss type temperature dependence and the values in the range 160–240 along with the c-axis.

On the permittivity of titanium dioxide