Jump to main content
Jump to site search

Issue 5, 2015
Previous Article Next Article

Single-shot laser treatment provides quasi-three-dimensional paper-based substrates for SERS with attomolar sensitivity

Author affiliations

Abstract

In this study, an eco-friendly and ultrasensitive paper substrate is developed for surface-enhanced Raman scattering (SERS) with performance approaching single molecule detection. By exploiting the laser-induced photothermal effect, paper fibrils with hybrid micro- and nanostructures can facilitate the formation of highly dense metal nanoparticles (NPs) after a single shot of laser illumination. Metal films deposited on the paper substrates feature discontinuous morphologies, with the fragments acting as multiple nucleation sites. Because thermal conductivity is low on the broken films and the underlying paper fibrils, the incident energy is absorbed efficiently. Moreover, the quasi-three-dimensional distribution of NPs on the SERS paper greatly enhances the SERS signals within the effective collection volume of a Raman microscope. As a result of the large number of highly effective hot spots and the condensation effect, the hydrophobic SERS paper provides SERS signals with stable and uniform reproducibility throughout the detection area. The limits of detection when using the paper substrates reach the attomolar (10−18 M) level, thereby approaching single molecule detection.

Graphical abstract: Single-shot laser treatment provides quasi-three-dimensional paper-based substrates for SERS with attomolar sensitivity

Back to tab navigation

Supplementary files

Publication details

The article was received on 06 Sep 2014, accepted on 15 Oct 2014 and first published on 05 Nov 2014


Article type: Paper
DOI: 10.1039/C4NR05178E
Author version
available:
Download author version (PDF)
Nanoscale, 2015,7, 1667-1677

  •   Request permissions

    Single-shot laser treatment provides quasi-three-dimensional paper-based substrates for SERS with attomolar sensitivity

    C. Yu, S. Chou, Y. Tseng, S. Tseng, Y. Yen and H. Chen, Nanoscale, 2015, 7, 1667
    DOI: 10.1039/C4NR05178E

Search articles by author

Spotlight

Advertisements