posted on 2023-10-23, 15:15authored byHanqun Wang, Ju Hwan Kim, Jeon Kim, Chong Seung Yoon
Lipid nanotubes (LNTs) produced by the polymerization
of 1,2-bis(10,12-tricosadiynoyl)-sn-glycero-3-phosphocholine
were uniformly coated with a
thin film (∼13 nm) of Pt through a two-step reduction of H2PtCl6. The Pt-coated LNTs exhibited a strong catalytic
activity toward the oxidation of glucose in a phosphate buffer solution
(PBS) at pH 7.4. The Pt-coated LNTs can be used as an electrochemical
sensor for measuring the glucose concentrations in physiological fluids
and also as an anode for biocompatible glucose fuel cells (GFCs).
A membrane-less GFC based on the proposed Pt-coated LNT anode and
Fe–Co/carbon cathode produced a high power density of 62 μW/cm2 in a PBS solution with 5 mM glucose with an open circuit
voltage of 0.3 V.