Campus Units

Mechanical Engineering, Materials Science and Engineering

Document Type

Article

Publication Version

Published Version

Publication Date

3-30-2020

Journal or Book Title

Nanomaterials

Volume

10

Issue

4

First Page

644

DOI

10.3390/nano10040644

Abstract

Gold (Au) and copper (Cu)-based nanostructures are of great interest due to their applicability in various areas including catalysis, sensing and optoelectronics. Nanostructures synthesized by the galvanic displacement method often lead to non-uniform density and poor size distribution. Here, density and size-controlled synthesis of Au and Cu-based nanostructures was made possible by galvanic displacement with limited exposure to hydrofluoric (HF) acid and the use of surfactants like L-cysteine (L-Cys) and cetyltrimethylammonium bromide (CTAB). An approach involving cyclic exposure to HF acid regulated the nanostructure density. Further, the use of surfactants generated monodisperse nanoparticles in the initial stages of the deposition with increased density. The characterization of Au and Cu-based nanostructures was performed by scanning electron microscopy, atomic force microscopy, UV-Visible spectroscopy, X-ray photoelectron spectroscopy, Raman spectroscopy and X-ray diffraction. The surface enhanced Raman spectroscopic measurements demonstrated an increase in the Raman intensity by two to three orders of magnitude for analyte molecules like Rhodamine 6G dye and paraoxon.

Comments

This article is published as Tran, Minh, Sougata Roy, Steven Kmiec, Alison Whale, Steve Martin, Sriram Sundararajan, and Sonal Padalkar. "Formation of Size and Density Controlled Nanostructures by Galvanic Displacement." Nanomaterials 10, no. 4 (2020): 644. DOI: 10.3390/nano10040644. Posted with permission.

Creative Commons License

Creative Commons Attribution 4.0 License
This work is licensed under a Creative Commons Attribution 4.0 License.

Copyright Owner

The Author(s)

Language

en

File Format

application/pdf

Share

COinS