Please use this identifier to cite or link to this item:
Title: Surface-structured gold-nanotube mats: Fabrication, characterization, and application in surface-enhanced Raman scattering
Authors: Fathima, S.J.H. 
Paul, J. 
Valiyaveettil, S. 
Keywords: electrospinning
gold nanotubes
nanostructured materials
surface-enhanced Raman scattering
Issue Date: 5-Nov-2010
Source: Fathima, S.J.H., Paul, J., Valiyaveettil, S. (2010-11-05). Surface-structured gold-nanotube mats: Fabrication, characterization, and application in surface-enhanced Raman scattering. Small 6 (21) : 2443-2447. ScholarBank@NUS Repository.
Abstract: The fabrication and characterization of nanostructured fibrous gold mats having high specific surface areas is reported. Freestanding porous films of 6-20-μm thickness and density 0.43 ± 0.02 g cm3 are prepared using e-beam evaporation of gold on an electrospun nanoporous polymer template and subsequent removal of the template polymer in a suitable solvent. Structural characterization using electron microscopy techniques shows a nanofiber diameter in the range of 300-6000 nm, and the size of the nanochannels on the fiber surface is ≈200-350 nm. Such surface structuring is achieved through fast evaporation of organic solvent and phase separation of polymers during the electrospinning process. The wedge thickness varies from a few nanometers to a few tens of nanometers. The freestanding films possess good mechanical integrity and robustness. The calculated Young's modulus based on the slope in the elastic region is ≈114 MPa and gives an ultimate breaking strength of 0.7-0.8 MPa at a percentage elongation of 1.5-2.0%. X-ray diffraction and transmission electron microscopy measurements demonstrate the formation of polycrystalline gold nanostructures. Electrical characterization performed on these gold nanotubes reveals pure metallic behavior. Raman spectroscopic characterization of the fibrous membrane is performed using crystal violet (CV) adsorbed on it. Well-defined spectral peaks are obtainable at concentrations as low as 10-7 M of CV, which did not give spectral signals at this low concentration on its own. © 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Source Title: Small
ISSN: 16136810
DOI: 10.1002/smll.201000342
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.


checked on Mar 7, 2018


checked on Mar 7, 2018

Page view(s)

checked on Feb 25, 2018

Google ScholarTM



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.