nn2c03367_si_003.pdf (2.54 MB)
Room-Temperature Oxygen Transport in Nanothin BixOySez Enables Precision Modulation of 2D Materials
journal contributionposted on 2022-09-15, 20:14 authored by Zachariah Hennighausen, Bethany M. Hudak, Madeleine Phillips, Jisoo Moon, Kathleen M. McCreary, Hsun-Jen Chuang, Matthew R. Rosenberger, Berend T. Jonker, Connie H. Li, Rhonda M. Stroud, Olaf M. J. van ’t Erve
Oxygen conductors and transporters are important to several consequential renewable energy technologies, including fuel cells and syngas production. Separately, monolayer transition-metal dichalcogenides (TMDs) have demonstrated significant promise for a range of applications, including quantum computing, advanced sensors, valleytronics, and next-generation optoelectronics. Here, we synthesize a few-nanometer-thick BixOySez compound that strongly resembles a rare R3m bismuth oxide (Bi2O3) phase and combine it with monolayer TMDs, which are highly sensitive to their environment. We use the resulting 2D heterostructure to study oxygen transport through BixOySez into the interlayer region, whereby the 2D material properties are modulated, finding extraordinarily fast diffusion near room temperature under laser exposure. The oxygen diffusion enables reversible and precise modification of the 2D material properties by controllably intercalating and deintercalating oxygen. Changes are spatially confined, enabling sub-micrometer features (e.g., pixels), and are long-term stable for more than 221 days. Our work suggests few-nanometer-thick BixOySez is a promising unexplored room-temperature oxygen transporter. Additionally, our findings suggest that the mechanism can be applied to other 2D materials as a generalized method to manipulate their properties with high precision and sub-micrometer spatial resolution.
including quantum computingincluding fuel cellsdemonstrated significant promisetemperature oxygen transportertemperature oxygen transportstudy oxygen transportresulting 2d heterostructuremicrometer spatial resolutionenables precision modulationpromising unexplored room2d material properties2 subdeintercalating oxygen2d materialsmicrometer featureshigh precisionz x work suggeststerm stablesyngas productionsub ><strongly resemblesspatially confinedr precise modificationmonolayer transitionmetal dichalcogenideslaser exposureinterlayer regionhighly sensitivegeneration optoelectronicsgeneralized methodfindings suggestenabling subcontrollably intercalatingbismuth oxideadvanced sensors> sub221 days