High-precision neuromodulation with high efficacy poses great importance in neuroscience. Also, ultrasound frequency in sub-MHz gives greater penetration depth of neuromodulation in vivo, and has many different biomedical applications, such as ocular drug delivery, arte- rial hyperplasia reduction, etc. Here we fabricated a series of carbon-nanotube (CNT) and polydimethylsiloxane (PDMS) mixture films with different CNT concentration and thick- ness, which can generate highly efficient sub-MHz ultrasound. We discovered that 0.8% CNT concentration CNT/PDMS films gave approximately 1 MHz frequency, below which we achieved tunable frequency in sub-MHz area. Additionally, we adjusted the PDMS base to curing agent ratio and discovered that the 2:1 ratio’s optoacoustic conversion ef- ficiency is 1.6 times greater than the typical 10:1 ratio. Our work offers a potential way to increase photoacoustic conversion rate by optimizing CNT/PDMS films’ fabrication for further photoacoustic-related applications.
| Identifer | oai:union.ndltd.org:bu.edu/oai:open.bu.edu:2144/45487 |
| Date | 17 January 2023 |
| Creators | Xiang, Maijie |
| Contributors | Yang, Chen, Cheng, Ji-Xin |
| Source Sets | Boston University |
| Language | en_US |
| Detected Language | English |
| Type | Thesis/Dissertation |
| Rights | Attribution-NoDerivatives 4.0 International, http://creativecommons.org/licenses/by-nd/4.0/ |
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