Strongly Confined Bi<sub>2</sub>Se<sub>3</sub> Quantum Dots via Pulsed Laser Ablation in Liquids
Bismuth selenide (Bi<sub>2</sub>Se<sub>3</sub>) is a binary compound displaying a strong spin-orbit coupling, resulting in a narrow bulk bandgap material with a gapless metallic surface. By shrinking the size of Bi<sub>2</sub>Se<sub>3</sub> within the strong confinement regime, its optoelectronic properties changed drastically. To achieve this goal, strongly confined Bi<sub>2</sub>Se<sub>3</sub> quantum dots (QDs) were produced by pulsed laser ablation in liquids (PLAL). The laser used for the synthesis was a nanosecond Nd/YAG laser emitting at 1064 nm and pulsing at ∼13 mJ/pulse. The irradiation of the bulk target was performed at 1 kHz in acetone and lasted 5 min. Finally, the Bi<sub>2</sub>Se<sub>3</sub> QDs were spherical in shape with a diameter around 7 ± 3 nm and displaying an energy bandgap of 1.97 ± 0.19 eV.
Authors
- Xin Lu (ORCID: https://orcid.org/0000-0002-9992-2077)
- Grégory Guisbiers (ORCID: https://orcid.org/0000-0002-4615-6014)
- Francisco Ruiz‐Zepeda (ORCID: https://orcid.org/0000-0002-2637-3433)
- Qiaohui Zhou
- R. Subedi (ORCID: https://orcid.org/0009-0002-8173-3179)
- Matthew Burningham
Institutions
- University of Arkansas at Little Rock (US)
- Tulane University (US)
- National Institute of Chemistry (SI)
Publication Details
- Journal
- ACS Omega
- Published
- 2025-05-29
- DOI
- https://doi.org/10.1021/acsomega.5c01222
- Citations
- 2
- Primary Topic
- Laser-Ablation Synthesis of Nanoparticles
- Type
- article
- Field-Weighted Citation Impact
- 1.35
Funders
- Javna Agencija za Raziskovalno Dejavnost RS
- National Institute of General Medical Sciences
- Office of Multidisciplinary Activities