NOTICE: Due to a lapse in annual appropriations, most of this website is not being updated. Learn more.
Form submissions will still be accepted but will not receive responses at this time. Sections of this site for programs using non-appropriated funds (such as NVLAP) or those that are excepted from the shutdown (such as CHIPS and NVD) will continue to be updated.
An official website of the United States government
Here’s how you know
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Static and Time-Resolved Terahertz Measurements of Photoconductivity in Solution-Deposited Ruthenium Oxide Nanofilms
Published
Author(s)
Brian Alberding, Paul A. Desario, Adam D. Dunkelberger, Debra R. Rolison, Jeffrey C. Owrutsky, Edwin J. Heilweil
Abstract
Thin film Ruthenium Oxide (RuO2) is a promising alternative material as a conductive electrode in electronic applications because its rutile crystalline form is metallic and highly conductive. Herein, a previously established solution-deposition multi-layer technique is employed to fabricate ca. 55 nm thick films (nanoskins) and terahertz spectroscopy used to determine their photoconductive properties. Upon calcining at temperatures ranging from 373 K to 773 K, nanoskins undergo a transformation from insulating/semiconductor type behavior to metallic behavior. Terahertz time-domain spectroscopy (THz-TDS) indicates that the nanoskins attain maximum static conductivity when calcined at 673 K. Picosecond time-resolved Terahertz spectroscopy (TRTS) using 400 nm and 800 nm excitation reveals a transition to metallic behavior when calcined at 523 K. For calcine temperatures less than 523 K, the conductivity increases following photoexcitation (del(E) < 0) while higher calcine temperatures yield films composed of crystalline, rutile RuO2 and the conductivity decreases (del(E) > 0) following photoexcitation.
Alberding, B.
, Desario, P.
, Dunkelberger, A.
, Rolison, D.
, Owrutsky, J.
and Heilweil, E.
(2017),
Static and Time-Resolved Terahertz Measurements of Photoconductivity in Solution-Deposited Ruthenium Oxide Nanofilms, Applied Physics, [online], https://doi.org/10.1021/acs.jpcc.6b12382, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=921248
(Accessed October 8, 2025)