1：Experimental Design and Method Selection:

The study involved fabricating optoacoustic transducers using CNT-PDMS composites with different CNT morphologies to investigate the effects of thermal conductivity on performance. Theoretical models based on thermal diffusion and acoustic wave equations were used for analysis.

2：Sample Selection and Data Sources:

Four types of CNTs with varying diameters and lengths (CNT I: 0.5-2 mm, ~8 nm; CNT II: 10-30 mm, ~8 nm; CNT III: ~50 mm, ~12 nm; CNT IV: ~50 mm, ~15 nm) were purchased from Nanjing XFNANO Materials Tech Co., Ltd. PDMS (SYLGARD-184) and toluene were used as materials.

3：5-2 mm, ~8 nm; CNT II:

3. List of Experimental Equipment and Materials: Equipment included a pulsed laser (Lapa-80, λ=532 nm), needle hydrophone (HPM02-1), oscilloscope (TDS-2024B), spectrophotometer (Lambda35), laser thermal conductivity meter (LFA467), and physical property measurement system (PPMS-9T). Materials were CNTs, PDMS, and toluene.

4：List of Experimental Equipment and Materials:

4. Experimental Procedures and Operational Workflow: CNT-PDMS composites were fabricated by mixing, stirring, degassing, spin-coating, and curing. Ultrasound was generated using a laser and detected with a hydrophone. Thermal properties were measured using specified instruments.

5：Experimental Procedures and Operational Workflow:

5. Data Analysis Methods: Acoustic pressure and conversion efficiency were calculated using equations provided. Thermal conductivity was derived from thermal diffusivity, density, and specific heat capacity measurements. Theoretical simulations were compared with experimental results.