Next Article in Journal
Interaction between Persistent Organic Pollutants and ZnO NPs in Synthetic and Natural Waters
Previous Article in Journal
Seaweed-Liked WS2/rGO Enabling Ultralong Cycling Life and Enhanced Rate Capability for Lithium-Ion Batteries
Article Menu
Issue 3 (March) cover image

Export Article

Open AccessArticle

Controlling the Nanoscale Gaps on Silver Island Film for Efficient Surface-Enhanced Raman Spectroscopy

1
Department of Electrical Engineering, National Changhua University of Education, Changhua 500, Taiwan
2
Department of Photonics, National Sun Yat-sen University, Kaohsiung 804, Taiwan
*
Authors to whom correspondence should be addressed.
Nanomaterials 2019, 9(3), 470; https://doi.org/10.3390/nano9030470
Received: 18 February 2019 / Revised: 18 March 2019 / Accepted: 19 March 2019 / Published: 20 March 2019
  |  
PDF [5017 KB, uploaded 27 March 2019]
  |  

Abstract

We control the nanoscale gaps on silver island films by different processing methods and investigate the surface-enhanced Raman scattering (SERS) efficiency on the films. We propose a facile technique to control the film morphology by substrate bending while keeping the evaporation rate constant. The films developed by our new method are compared to the films developed by traditional methods at various evaporation rates. The SERS signals generated on the samples prepared by the new method have similar strengths as the traditional methods. Substrate bending allows us to reduce the gap sizes while using a higher evaporation rate, hence the film can be developed in a shorter time. This cost-effective and time-efficient method is suitable for the mass production of large-area SERS sensors with good sensitivity. Scanning electron microscope images are analyzed to quantify the gap densities and widths to elucidate the relationship between the film morphology and the SERS intensity. While the gap size appears to be the major factor influencing the enhancement, the shape of the nano-island also seems to influence the SERS efficiency. View Full-Text
Keywords: surface-enhanced Raman scattering (SERS); silver island film; surface plasmon resonance surface-enhanced Raman scattering (SERS); silver island film; surface plasmon resonance
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
SciFeed

Share & Cite This Article

MDPI and ACS Style

Chang, Y.-C.; Lu, Y.-C.; Hung, Y.-J. Controlling the Nanoscale Gaps on Silver Island Film for Efficient Surface-Enhanced Raman Spectroscopy. Nanomaterials 2019, 9, 470.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Nanomaterials EISSN 2079-4991 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top