Abstract:
We have developed a new fabrication process for making platinum black films on the surface of polydimethylsiloxane (PDMS) substrates using Marangoni flow. A yellowish droplet containing hexachloroplatinic acid (H₂PtCl₆) and sodium formate (HCOONa) was deposited on a 5-mm circular PDMS substrate. The droplet changed from yellow-wish to black after platinum (IV) ions were reduced to platinum black particles and subsequently turned colorless because the suspension particles were deposited uniformly on PDMS via Marangoni flow induction. The investigation of film morphology using optical microscopy and scanning electron microscopy revealed that Marangoni flow dispersed platinum black particles uniformly on the substrate. In addition, the fabricated film was employed as a catalyst for hydrogen peroxide (H₂O₂) decomposition.
Description:
In Partial Fulfillment for the Degree of Bachelor of Science, Department of Chemistry, Faculty of Science, Chulalongkorn University Academic Year 2016
