Visible-Light-Driven Asymmetric TiO2-Based Photocatalytic Micromotor Hybridized with a Conjugated Polyelectrolyte and Glucose Oxidase

Wonho Noh; Seonyoung Jo; Juang Kim; Taek Seung Lee

doi:10.1021/acs.langmuir.1c00729

Visible-Light-Driven Asymmetric TiO₂-Based Photocatalytic Micromotor Hybridized with a Conjugated Polyelectrolyte and Glucose Oxidase

Langmuir. 2021 May 25;37(20):6301-6310. doi: 10.1021/acs.langmuir.1c00729. Epub 2021 May 13.

Authors

Wonho Noh¹, Seonyoung Jo¹, Juang Kim¹, Taek Seung Lee¹

Affiliation

¹ Organic and Optoelectronic Materials Laboratory, Department of Advanced Organic Materials and Textile System Engineering, Chungnam National University, Daejeon 34134, Korea.

PMID: 33982566
DOI: 10.1021/acs.langmuir.1c00729

Abstract

We fabricated a TiO₂-based micromotor that was asymmetrically decorated with a water-soluble conjugated polymer (WSP) on one hemisphere and glucose oxidase (GO_x) on the opposite hemisphere. The WSP, which had photocatalytic activity for H₂O₂ decomposition, enabled motion of the micromotor under visible light. The GO_x on the other hemisphere of the micromotor decomposed glucose to produce H₂O₂ and enabled motion of the micromotor without light irradiation. In addition, WSP and GO_x were attached to TiO₂ by chemical bonds, providing stability during use. As a result, the micromotor could move by self-generating H₂O₂ for its own fuel by consuming glucose even without photoirradiation. The micromotor could move faster than without visible light irradiation through the synergistic decomposition of glucose and H₂O₂ under visible light by the diffusiophoretic mechanism with a speed of 7.49 μm/s.

Publication types

Research Support, Non-U.S. Gov't