TY - JOUR
T1 - EIS characterization of aging and humidity-related behavior of Bi2Se3 films of different morphologies
AU - Erts, Donats
AU - Katkevics, Juris
AU - Sjomkane, Maija
AU - Andzane, Jana
AU - Sarakovskis, Anatolijs
AU - Smits, Krisjanis
AU - Viksna, Arturs
AU - Rublova, Yelyzaveta
AU - Meija, Raimonds
N1 - Funding Information:
This work was supported by the ERDF project No. 1.1.1.1/16/1/257 . Institute of Solid State Physics, University of Latvia as the Center of Excellence has received funding from the European Union’s Horizon 2020 Framework Programme H2020-WIDESPREAD-01-2016-2017-TeamingPhase2 under grant agreement No. 739508 , project CAMART 2 .
Funding Information:
This work was supported by the ERDF project No. 1.1.1.1/16/1/257. Institute of Solid State Physics, University of Latvia as the Center of Excellence has received funding from the European Union's Horizon 2020 Framework Programme H2020-WIDESPREAD-01-2016-2017-TeamingPhase2 under grant agreement No. 739508, project CAMART2.
Publisher Copyright:
© 2022 Elsevier B.V.
PY - 2022/4
Y1 - 2022/4
N2 - Bi2Se3 thin films are widely studied as topological insulators and as prospective materials for thermoelectric and sensor applications. Storage of films under ambient conditions, especially at different humidities, may influence the physical properties of thin films. In the present work, electrochemical impedance spectroscopy is used to investigate the dependence of properties of continuous planar and partly disordered Bi2Se3 thin films, as well as nanoplate networks, deposited on mica, quartz and glass substrates by physical vapor deposition on the humidity in oxygen and nitrogen atmospheres. It has been shown that electrochemical impedance spectroscopy (EIS) can be used as an effective tool for the determination of the oxidation level of Bi2Se3 surfaces, the quality of the surface covering and for characterization of the type and parameters of the nanopores in Bi2Se3 thin films. Equivalent circuit models developed in this work characterize the interaction of gaseous water with non-oxidized and oxidized surfaces of Bi2Se3 nanostructures, as well as and with the substrate areas located between the Bi2Se3 nanoplates in the Bi2Se3 networks and open to the surrounding environment, in oxygen and nitrogen atmospheres.
AB - Bi2Se3 thin films are widely studied as topological insulators and as prospective materials for thermoelectric and sensor applications. Storage of films under ambient conditions, especially at different humidities, may influence the physical properties of thin films. In the present work, electrochemical impedance spectroscopy is used to investigate the dependence of properties of continuous planar and partly disordered Bi2Se3 thin films, as well as nanoplate networks, deposited on mica, quartz and glass substrates by physical vapor deposition on the humidity in oxygen and nitrogen atmospheres. It has been shown that electrochemical impedance spectroscopy (EIS) can be used as an effective tool for the determination of the oxidation level of Bi2Se3 surfaces, the quality of the surface covering and for characterization of the type and parameters of the nanopores in Bi2Se3 thin films. Equivalent circuit models developed in this work characterize the interaction of gaseous water with non-oxidized and oxidized surfaces of Bi2Se3 nanostructures, as well as and with the substrate areas located between the Bi2Se3 nanoplates in the Bi2Se3 networks and open to the surrounding environment, in oxygen and nitrogen atmospheres.
KW - BiSe films
KW - Electrochemical impedance spectroscopy
KW - Humidity
KW - Oxidation
UR - http://www.scopus.com/inward/record.url?scp=85125579230&partnerID=8YFLogxK
U2 - 10.1016/j.nanoso.2022.100847
DO - 10.1016/j.nanoso.2022.100847
M3 - Article
AN - SCOPUS:85125579230
SN - 2352-507X
VL - 30
JO - Nano-Structures and Nano-Objects
JF - Nano-Structures and Nano-Objects
M1 - 100847
ER -