Dipea

The synthesis of C16 was accomplished using a solid‐phase methodology on Fmoc Rink Amide‐MBHA resin (GL biochem, Shanghai, China) by a microwave synthesizer (CEM, NC, USA). Fmoc‐protected amino acids (GL Biochem, Shanghai, China) were used. After the quantified resin was swelled, deprotected, and washed, a mixed solution of Fmoc‐protected amino acid and activator (HBTU, HOBT, and DIPEA, all purchased from GL biochem, Shanghai, China) was added. Then the mixture was bubbled with nitrogen under microwave irradiation and washed with DMF (Samsung fine chemicals, Korea). The procedures of deprotection and coupling were repeated with the relevant Fmoc‐protected amino acids to create the peptide‐resin complex. Then resin was washed successively with DMF three times. The final peptide was cleaved using TFA/TIS/H2O (95:2.5:2.5, v/v/v) for 4 h at room temperature and precipitated with cold ethyl ether. Then ethyl ether was removed through centrifugation. All peptides were purified by preparative reversed‐phase high‐performance liquid chromatography (RP‐HPLC; Shimadzu LC‐10) on a C18 column (5 µm, 340 × 28 mm). The purity of C16 was demonstrated above 95%.

Poly(dimethylsiloxane) (PDMS) elastomer was obtained from Dow Corning (Sylgard 184). Ag nanowires dispersed in ethanol (CST-NW-S50) were ordered from Suzhou ColdStones Technology Co., Ltd. Silicone liquid (CAF-3) was purchased from Bluestar Silicones France Co., Ltd. Ethanol (purity 99.7%) was obtained from Sinapharm Chemical Reagent Co., Ltd. Fmoc–Tyr(tBu)–2-chlorotrityl resin, Fmoc–Gly–OH, Fmoc–Ala–OH, HOBT, TBTU and DIPEA were obtained from GL Biochem Co., Ltd. (Shanghai, China). 10,12-Pentacosadiynoic acid was purchased from Alfa-Aesar Co., Ltd. All other regents, compounds, and chemicals were obtained from commercial suppliers and used without further purification.