Low temperature-boosted high efficiency photo-induced charge transfer for remarkable SERS activity of ZnO nanosheets

Abstract

Improving photo-induced charge transfer (PICT) efficiency is the key factor for boosting surface-enhanced Raman scattering (SERS) performance of semiconductor nanomaterials. Introducing plentiful surface defect states in porous ZnO nanosheets (d-ZnO...

Semiconductor-based surface enhanced Raman scattering (SERS): from active materials to performance improvement

“…39 ZnO is a high refractive index semiconductor material and shows obvious merits as a SERS substrate. [40][41][42] Wen et al observed the SERS effect of pure ZnO colloids using a cyanine dye D266 as probe molecules in 1996. 43 Researchers have designed and fabricated ZnO nanostructure with various morphologies to realize enhanced SERS activity.…”

Plasmon-assisted nanophase engineering of titanium dioxide for improved performances in single-particle based sensing and photocatalysis

“…4c), which is likely due to the charge transfer (CT) effect. [60][61][62][63][64] Laser annealing at 5.5 mW with different irradiation times was also performed (Fig. 4f ), which shows the highest SERS signals from the Au@c-TiO 2 with a 30 s laser annealing, followed by a linear decay over time.…”

Single-atom sites on perovskite chips for record-high sensitivity and quantification in SERS

“…However, novel semiconductors need to be further explored for superior sensitivity. Enhancement of charge transfer (quantum yield) on semiconductors for single-molecule level SERS has drawn considerable attention via further (1) improvement of the photoinduced charge generation [30] and (2) strengthening of the interaction between sites and probe biomolecules [17,[31][32][33]. Furthermore, along these two lines, the understanding of SERS enhancement mechanism could be greatly deepened and enriched.…”