Pulsed Current Electrodeposition of Ag Nanoparticles on Bamboo-like TiO 2 Nanotubes for Surface-Enhanced Raman Scattering Substrates
Year: 2025
Type: article
Abstract: High Resolution Image Download MS PowerPoint Slide In this work, we investigate the performance of surface-enhanced Raman scattering (SERS) substrates based on bamboo-like TiO 2 nanotubes (BTNTs) functionalized with silver nanoparticles (AgNPs) through pulsed-current electrodeposition (50 ms ON/250 ms OFF). The BTNT arrays, fabricated via alternating-voltage anodization, exhibit segmented morphologies that enhance nanoparticle anchoring and promote the dense generation of electromagnetic hotspots. Systematic optimization of deposition parameters revealed that 400 deposition cycles at a current density of 5 mA/cm 2 yielded the most favorable combination of nanoparticle distribution, structural morphology, and SERS activity. Under these conditions, the substrates achieved an analytical enhancement factor (AEF) of 1 × 10 6 and enabled the experimental detection of methylene blue down to 1 × 10 –8 M (theoretical LoD 1 × 10 –9 M). This study demonstrates a cost-effective, scalable, and tunable fabrication strategy for highly active SERS platforms, offering significant potential for practical sensing applications.
Source: ACS Omega
Authors: Marcos Luna Cervantes, Ismael Garcia-Ramírez, Erick Octavio Santos Santiago, Diana Jiménez Girón, José Luis Zamora Navarro, Antonio García Chavez, Leandro García-González, Adriana Báez-Rodríguez, Julián Hernández Torres, Luis Zamora-Peredo
Language: English
Field: Materials Science
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $1,935
Award: G9000264317
OpenAlex ID: W7114765584