Nanopatterned Bulk Metallic Glass Biosensors

Area of Science:

• Materials Science
• Biotechnology
• Electrochemistry

Background:

• Nanopatterning enhances biosensor signal and sensitivity.
• Platinum-based bulk metallic glass (Pt-BMG) is a biocompatible material suitable for biosensor electrodes.
• Pt-BMG can be processed at low temperatures to create nanoscale topography.

Purpose of the Study:

• To investigate the impact of nanoscale surface area enhancement on glucose biosensor performance using nanopatterned Pt-BMG electrodes.
• To compare the performance of nanopatterned Pt-BMG electrodes with flat Pt-BMG controls.
• To explore the functionalization of Pt-BMG electrodes with glucose oxidase enzyme.

Main Methods:

• Fabrication of nanopatterned (200 nm) and flat Pt-BMG electrodes.
• Functionalization of electrodes with glucose oxidase enzyme.
• Electrochemical measurements including cyclic voltammetry (CV) and amperometric voltammetry (AV).
• Studying glucose dosing response from 2 mM to 10 mM.

Main Results:

• Nanopatterned Pt-BMG electrodes exhibited a 10-12 times greater effective current density dynamic range compared to flat controls.
• Sensitivity of nanopatterned electrodes was measured at 3.28 μA/cm²/mM, an order of magnitude higher than flat electrodes.
• Reproducible nanoscale topography on Pt-BMG significantly enhances glucose biosensor performance.

Conclusions:

• Nonrandom nanotopography is a scalable and customizable engineering tool for biosensor development.
• Integrating nanopatterning with Pt-BMG can create biocompatible biosensors with improved signal and sensitivity.
• This approach holds promise for advancing glucose biosensing technology.