Electrochromic semiconductors as colorimetric SERS substrates with high reproducibility and renewability

Area of Science:

• Materials Science
• Analytical Chemistry
• Nanotechnology

Background:

• Electrochromic technology is widely used in displays, smart windows, and mirrors.
• Surface-enhanced Raman scattering (SERS) faces challenges in reproducibility and renewability, hindering quantitative analysis.
• There is a need for standardized, cost-effective SERS substrates.

Purpose of the Study:

• To demonstrate a generic electrochromic strategy for improving SERS substrate reproducibility and renewability.
• To establish a quantitative link between electrochromic coloration and SERS signal amplification.
• To enable inference of SERS activity through visual color change.

Main Methods:

• Development of an electrochromic strategy for SERS substrates.
• Establishing a quantitative relationship between SERS signal and coloration degree.
• Utilizing color change as an indicator for SERS activity.

Main Results:

• Demonstrated a novel electrochromic strategy for SERS substrates.
• Established a quantitative correlation between coloration and SERS signal amplification.
• Showcased the potential for inferring SERS activity via color change.

Conclusions:

• The proposed electrochromic strategy addresses critical issues of reproducibility and renewability in SERS.
• This approach facilitates quantitative analysis and standardized production of SERS substrates.
• The findings represent a foundational step towards rationally designing sensitive, reproducible, and renewable electrochromic SERS substrates.