Micro-Sized pH Sensors Based on Scanning Electrochemical Probe Microscopy.
Muhanad Al-JedaEmmanuel Mena-MorcilloAicheng ChenPublished in: Micromachines (2022)
Monitoring pH changes at the micro/nano scale is essential to gain a fundamental understanding of surface processes. Detection of local pH changes at the electrode/electrolyte interface can be achieved through the use of micro-/nano-sized pH sensors. When combined with scanning electrochemical microscopy (SECM), these sensors can provide measurements with high spatial resolution. This article reviews the state-of-the-art design and fabrication of micro-/nano-sized pH sensors, as well as their applications based on SECM. Considerations for selecting sensing probes for use in biological studies, corrosion science, in energy applications, and for environmental research are examined. Different types of pH sensitive probes are summarized and compared. Finally, future trends and emerging applications of micro-/nano-sized pH sensors are discussed.
Keyphrases
- low cost
- single molecule
- label free
- high resolution
- gold nanoparticles
- small molecule
- living cells
- public health
- high throughput
- optical coherence tomography
- randomized controlled trial
- quantum dots
- fluorescence imaging
- molecularly imprinted
- photodynamic therapy
- risk assessment
- current status
- solid state
- loop mediated isothermal amplification