Pdms silicone elastomer

Highly‐transparent (>95%) elastomeric polydimethylsiloxane (PDMS) films (thickness: 200 μm) were donated by Bald Advanced Materials Co., Ltd. AgNO₃ (99.8%) was obtained from Shanghai Qiangshun Chemical Reagent Co., Ltd. Polyvinylpyrrolidone (PVP, MW of 55 000) and hydroxypropyl methylcellulose (HPMC) were harvested from Sigma‐Aldrich. Ethylene glycol (EG), glycerol, NaCl, NaBr, and acetone were purchased from Sinopharm Chemical Reagent Co., Ltd. Sago 9760 and Sago 3223 were obtained from Sago Co., Ltd. Silver paste was brought from Shenzhen Sinwe New Material Co., Ltd. Paraffin wax (T_m ≈ 52^o) was provided by Jinan Dingyi Chemical Co., Ltd. Fe₃O₄ nanoparticles (diameter: 10 nm) were contributed by Tianjin kaili metallurgical research institute. PDMS silicone elastomer obtained from Dow Corning (Sylgard 184) was used as the bonding agent. PDMS is a two‐part solvent free flexible silicone organic polymer in the form of a base compound with a separate hydrosilane curing agent that acts as a crosslinker. Distilled water (H₂O, 1 g cm^–3 density) served as contact‐angle test materials.

Fe₃O₄ nanoparticles with a diameter of ~10 nm were obtained from Tianjin Kaili Metallurgical Research Institute (Tianjin, China). PDMS silicone elastomer was purchased from Dow Corning (Sylgard 184, USA), which is used as the host matrix. Silicone oil (20 and 100 mPa s) and ethanol were purchased from Meryer Chemical Technology Co. Ltd. (Shanghai, China). Z-cut optical-grade lithium niobate wafers with a thickness of 0.5 mm were provided by Rayon Optical Materials (Shanghai, China). A commercial solution of superhydrophobic SiO₂ nanoparticles was purchased from Rust-Oleum (USA). Quartz glass sheets were purchased from Beijing Zhong Cheng Quartz Glass Co. Ltd (Beijing, China). Deionized water (resistivity ∼18 MΩ, 1 mPas) was derived from a Mili-Q water purification system (Summer-S2-20H, Sichuan Delishi Technology Co., Ltd., China). The PESS is constructed with a sandwich structure, including a slippery layer, a pyroelectric layer, and a photothermal layer from top to bottom.