Journal
FRONTIERS OF PHYSICS
Volume 16, Issue 4, Pages -Publisher
HIGHER EDUCATION PRESS
DOI: 10.1007/s11467-021-1047-z
Keywords
surface-enhanced Raman scattering; plasmon-free; enhancement mechanism; enhancement strategy; charge transfer
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Funding
- National Natural Science Foundation of China [11874108]
- National Key R&D Program of China [2017YFA0403600]
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Plasmon-free SERS substrates have gained significant attention for their excellent properties and broad applications, with recent research focusing on enhancement mechanisms and strategies making notable progress.
Plasmon-free surface-enhanced Raman scattering (SERS) substrates have attracted tremendous attention for their abundant sources, excellent chemical stability, superior biocompatibility, good signal uniformity, and unique selectivity to target molecules. Recently, researchers have made great progress in fabricating novel plasmon-free SERS substrates and exploring new enhancement strategies to improve their sensitivity. This review summarizes the recent developments of plasmon-free SERS substrates and specially focuses on the enhancement mechanisms and strategies. Furthermore, the promising applications of plasmon-free SERS substrates in biomedical diagnosis, metal ions and organic pollutants sensing, chemical and biochemical reactions monitoring, and photoelectric characterization are introduced. Finally, current challenges and future research opportunities in plasmon-free SERS substrates are briefly discussed.
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