Related Experiment Video
Updated: Feb 21, 2026
07:08
In Situ Synthesis of Gold Nanoparticles without Aggregation in the Interlayer Space of Layered Titanate Transparent Films
Published on: January 17, 2017
8.6K
Plasmonic-Photonic Interference Coupling in Submicrometer Amorphous TiO2-Ag Nanoarchitectures.
Rajeshkumar S Hyam, Jihoon Jeon, Songhwa Chae
1Department of Mechanical Engineering, Myongji University , 241, Geumhak-ro, Cheoin-gu, Yongin-si, Gyeonggi-do 449-728, Republic of Korea.
Langmuir : the ACS Journal of Surfaces and Colloids
|October 8, 2017
Summary
Amorphous titanium dioxide nanotubes with silver nanoparticles show enhanced surface-enhanced Raman scattering (SERS) sensitivity. This improvement is linked to plasmonic-photonic interference coupling, offering potential for advanced sensor designs.
Area of Science:
- Materials Science
- Nanotechnology
- Spectroscopy
Background:
- Surface-enhanced Raman scattering (SERS) offers high sensitivity for molecular detection.
- Titanium dioxide nanotubes (TiO2 NTs) are versatile nanostructures for various applications.
- Silver nanoparticles (Ag NPs) are widely used as SERS substrates due to their plasmonic properties.
Purpose of the Study:
- To investigate the effect of crystallinity in TiO2 nanotubes (TNTs) incorporated with Ag NPs on SERS sensitivity.
- To demonstrate the dependence of SERS behavior on plasmonic-photonic interference coupling (P-PIC) in TNT-AgNP nanoarchitectures.
- To elucidate the role of amorphous vs. crystalline TNTs in enhancing SERS signals.
Main Methods:
- Synthesis of amorphous TNTs (A-TNTs) via two-step anodization of Ti substrate.
- Preparation of crystalline TNTs (C-TNTs) through thermal annealing at 500 °C.
- Incorporation of 20 nm Ag NPs onto TNTs via thermal evaporation.
- Investigation of SERS signals based on TNT crystallinity and P-PIC.
Main Results:
- (A-TNTs)-AgNP substrates exhibited dramatically enhanced SERS performance compared to (C-TNTs)-AgNP substrates.
- High SERS enhancement in (A-TNTs)-AgNP is attributed to electron confinement at the A-TNT/AgNP interface.
- TNT length variation influenced P-PIC, leading to constructive or destructive interference patterns and varying SERS intensity.
Conclusions:
- SERS intensity is significantly dependent on P-PIC in (A-TNTs)-AgNP nanostructures.
- Amorphous TNTs offer superior SERS enhancement compared to crystalline counterparts.
- The findings provide insights for designing plasmonic-integrated devices for enhanced electromagnetic applications.
