| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Bio-Nano Interfaces and Engineering Applications
|
| Presentation Title |
Bio-imaging with Photoluminescence of Single-layer MoS2 |
| Author(s) |
Yuhei Hayamizu |
| On-Site Speaker (Planned) |
Yuhei Hayamizu |
| Abstract Scope |
Visualizing biological activity in real time poses a novel way for biosensing. Single-layer Molybdenum disulfide (MoS2) shows strong photoluminescence (PL) under photo-excitation due to its semiconducting nature with direct bandgap. In this work, we demonstrate pH-sensitive photoluminescence of single-layer MoS2 grown by chemical vapor deposition (CVD). While CVD MoS2 grown from MoS2 powder did not have a strong pH sensitivity, MoS2 grown from MoO2 powder exhibited a sensitivity to the solution pH in its PL intensity. Next, we utilized the single-layer MoS2 as the active layer of an imaging sensor to monitor activity of individual bacteria by the MoS2 PL. For the demonstration, we employed Lactobacillus. It is one of the most studied probiotic bacteria which consumes glucose and produces lactic acid by fermentation. The bacteria were placed on a single-layer MoS2 and its PL intensity was monitored in real time. |
| Proceedings Inclusion? |
Planned: |