Millimeter-Sized Single-Crystalline Anatase Nb-Doped TiO<sub>2</sub> Membranes Exhibiting High Electrical Conduction and Transparency
Nb-doped TiO2 (TNO) is a transparent conducting electrode, contributing to transparent electronics and bioelectronics. Using a TNO membrane, we can fabricate transparent, flexible, and removable electrode patches and wires. However, highly conducting TNO membranes cannot be easily fabricated because of crack formation originating due to the large lattice mismatch between the sacrificial layer and TNO. Herein, La0.7Sr0.3MnO3 was used as a sacrificial layer to reduce the lattice mismatch with TNO, and TNO epitaxial thin films were grown on a SrTiO3 single-crystal substrate using the sacrificial layer. Although La0.7Sr0.3MnO3 was insoluble in water but soluble in acid, fewer cracks were formed in the millimeter-sized TNO membrane because of the chemical resistance of TNO to most acids and bases. Consequently, the TNO membrane exhibited high crystallinity and electrical conductivity, similar to those of TNO epitaxial thin films.
Authors
- Masamichi Negishi (ORCID: https://orcid.org/0000-0002-2482-8334)
- Yasutaka Uchida (ORCID: https://orcid.org/0009-0006-2876-8910)
- Jiyang Huang (ORCID: https://orcid.org/0000-0001-6621-2549)
- Seung Sae Hong (ORCID: https://orcid.org/0000-0002-4440-7393)
- Tomoteru Fukumura (ORCID: https://orcid.org/0000-0002-8957-3520)
Institutions
- Tohoku University (JP)
- University of California System (US)
- Spintronics Research Network of Japan (JP)
- Institute for Materials Research, Tohoku University
- Graduate School USA (US)
Publication Details
- Journal
- ACS Applied Electronic Materials
- Published
- 2025-04-02
- DOI
- https://doi.org/10.1021/acsaelm.4c02342
- Primary Topic
- Analytical Chemistry and Sensors
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- Tohoku University
- Japan Society for the Promotion of Science