A Wearable Electrochemical Sensor Based on Single-Atom Pt Anchored on Activated NiCo-LDH/Ti3C2Tx for Real-Time Monitoring of Glucose

Anal Chem. 2024 Nov 12;96(45):18239-18245. doi: 10.1021/acs.analchem.4c04471. Epub 2024 Nov 4.

Abstract

Wearable, noninvasive sweat sensors enable real-time monitoring of metabolites in human health management. However, the commercial enzyme-based and currently nonenzymatic glucose sensor represents sluggish glucose oxidation kinetics and a narrow sensing range. Rational design of sensitive materials is significant yet faces a huge challenge. Herein, we construct a single-atom Pt supported on NiCo-LDH/Ti3C2Tx heterostructures (Pt1-NiCo-LDH/Ti3C2Tx) as the nonenzymatic electrochemical glucose sensor sensitive materials for selective detection of glucose level in human sweat. The obtained Pt1-NiCo-LDH/Ti3C2Tx with improved structural stability and enhanced charge transfer efficiency shows a low oxidation peak potential of 0.49 V, high sensitivity of 506.6 μA mM-1 cm-2, a low detection limit of 0.035 μM, and long-term stability toward the glucose detection. The wearable sensor, coupled with a wireless transmission module and a signal processing chip, is used for real-time perspiration glucose monitoring during outdoor exercise. The result is comparable to that of high-performance liquid chromatography (HPLC). This research provides a new paradigm for designing a wearable nonenzymatic electrochemical glucose sensor, enabling noninvasive real-time monitoring of glucose concentrations in human sweat.

MeSH terms

  • Biosensing Techniques
  • Electrochemical Techniques* / instrumentation
  • Glucose* / analysis
  • Humans
  • L-Lactate Dehydrogenase / analysis
  • L-Lactate Dehydrogenase / chemistry
  • L-Lactate Dehydrogenase / metabolism
  • Limit of Detection
  • Nickel / chemistry
  • Platinum* / chemistry
  • Sweat* / chemistry
  • Titanium / chemistry
  • Wearable Electronic Devices*

Substances

  • Glucose
  • Platinum
  • Titanium
  • Nickel
  • L-Lactate Dehydrogenase