Department of Mechanical and Aerospace Engineering, University of California, 420 Westwood Plz., Engineering IV, Los Angeles, CA 90095-1597, USA.
Biosens Bioelectron. 2010 Mar 15;25(7):1603-8. doi: 10.1016/j.bios.2009.11.019. Epub 2009 Nov 27.
A novel method using intense pulsed light (IPL) for the metal nano-island formation on carbon nanotube (CNT) was introduced. The IPL-induced photothermal dewetting process improved platinum (Pt) catalyst utilization by transforming nano-islands from Pt film on CNT and increasing the surface area for the subsequent sputtering. The irradiation of high intensity of light on the Pt film causes surface-energy-driven diffusion of Pt atoms and forms the array of nano-islands on CNT. The thickness of Pt film can change the size of nano-islands. Cyclic voltammetry showed a dramatically improved glucose oxidation at the IPL morphology modified Pt-CNT electrode compared to the Pt sputtered CNT electrode without IPL irradiation. The power densities of glucose/air biofuel cell based on the morphology modified Pt-CNT electrode and the as-sputtered Pt-CNT electrode were 0.768 microW/cm(2) and 0.178 microW/cm(2), respectively. The biofuel cell based on morphology modified Pt-CNT electrode showed highly stable output in long-term performance. The power density dropped 14.1% in 30 days. Efforts are underway to improve the interface transfer to achieve higher potential and current output.
一种使用强脉冲光 (IPL) 在碳纳米管 (CNT) 上形成金属纳米岛的新方法被提出。 IPL 诱导的光热去湿过程通过将纳米岛从 CNT 上的 Pt 薄膜转化并增加随后溅射的表面积来提高铂 (Pt) 催化剂的利用率。高强度光照射在 Pt 薄膜上会导致 Pt 原子的表面能驱动扩散，并在 CNT 上形成纳米岛阵列。Pt 薄膜的厚度可以改变纳米岛的尺寸。与未经过 IPL 照射的溅射 Pt-CNT 电极相比，循环伏安法显示在 IPL 形貌修饰的 Pt-CNT 电极上葡萄糖氧化的性能显著提高。基于形貌修饰的 Pt-CNT 电极和溅射 Pt-CNT 电极的葡萄糖/空气生物燃料电池的功率密度分别为 0.768 μW/cm² 和 0.178 μW/cm²。基于形貌修饰的 Pt-CNT 电极的生物燃料电池在长期性能中表现出高度稳定的输出。在 30 天内，功率密度下降了 14.1%。目前正在努力改善界面转移，以实现更高的电势和电流输出。
