Flexible catalytic electrodes for oxidation of biomolecules were realized by a supercritical carbon dioxide (scCO₂)-assisted functionalization process. The flexible catalytic electrode was a composite of Au/Ni-P/polyethylene terephthalate (PET). ScCO₂ was used as the solvent in the catalyzation step of an electroless plating process. Palladium bis-hexafluoroacetylacetonate was used as the source of the palladium catalyst for the high solubility in scCO₂. After the catalyzation step, Ni-P was firstly deposited on the catalyzed PET as the sacrificial layer for the later gold deposition. Electrical resistance of the Ni-P/PET composite was 0.27 Ω and maintained at 0.30 Ω after a tape adhesion test, which revealed the positive contribution of the scCO₂ catalyzation on reliability of the metallized PET. After deposition of the gold layer, the flexible Au/Ni-P/PET composite was evaluated as the catalytic electrode in oxidation of urea, ascorbic acid and glucose to demonstrate the applicability in flexible biosensors.

用于生物分子氧化的柔性催化电极是通过超临界二氧化碳 ( scCO ₂ ) 辅助功能化过程实现的。柔性催化电极是 Au/Ni-P/聚对苯二甲酸乙二醇酯 (PET) 的复合材料。ScCO ₂在化学镀工艺的催化步骤中用作溶剂。由于在scCO _{2 中}的高溶解度，使用双六氟乙酰丙酮钯作为钯催化剂的来源。在催化步骤之后，Ni-P 首先沉积在催化的 PET 上，作为后续金沉积的牺牲层。Ni-P/PET 复合材料的电阻为 0.27 Ω，并在胶带粘附测试后保持在 0.30 Ω，这表明 scCO 的积极贡献₂对金属化PET可靠性的催化作用。在金层沉积后，柔性 Au/Ni-P/PET 复合材料被评估为尿素、抗坏血酸和葡萄糖氧化的催化电极，以证明其在柔性生物传感器中的适用性。