Electric Field-Induced Chemical Surface-Enhanced Raman Spectroscopy from Aligned Peptide Nanotube–Graphene Oxide Templates for Universal Trace Detection of Biomolecules
Files in This Item:
|Almohammed_JPhysChemLett2019.pdf||6.13 MB||Adobe PDF||Download Request a copy|
|Title:||Electric Field-Induced Chemical Surface-Enhanced Raman Spectroscopy from Aligned Peptide Nanotube–Graphene Oxide Templates for Universal Trace Detection of Biomolecules||Authors:||Almohammed, Sawsan
Rodriguez, Brian J.
Rice, James H.
|Permanent link:||http://hdl.handle.net/10197/10144||Date:||29-Mar-2019||Online since:||2019-04-25T07:23:11Z||Abstract:||Semiconductor-graphene oxide-based surface-enhanced Raman spectroscopy substrates represent a new frontier in the field of surface-enhanced Raman spectroscopy (SERS). However, the application of graphene oxide has had limited success because of the poor Raman enhancement factors that are achievable in comparison to noble metals. In this work, we report chemical SERS enhancement enabled by the application of an electric field (10-25 V/mm) to aligned semiconducting peptide nanotube-graphene oxide composite structures during Raman measurements. The technique enables nanomolar detection sensitivity of glucose and nucleobases with up to 10-fold signal enhancement compared to metal-based substrates, which, to our knowledge, is higher than that previously reported for semiconductor-based SERS substrates. The increased Raman scattering is assigned to enhanced charge-transfer resonance enabled by work function lowering of the peptide nanotubes. These results provide insight into how semiconductor organic peptide nanotubes interact with graphene oxide, which may facilitate chemical biosensing, electronic devices, and energy-harvesting applications.||Funding Details:||European Commission Horizon 2020
Science Foundation Ireland
|Type of material:||Journal Article||Publisher:||ACS||Journal:||The Journal of Physical Chemistry Letters||Volume:||10||Issue:||8||Start page:||1878||End page:||1887||Copyright (published version):||2019 American Chemical Society||DOI:||10.1021/acs.jpclett.9b00436||Language:||en||Status of Item:||Peer reviewed|
|Appears in Collections:||Conway Institute Research Collection|
Physics Research Collection
Show full item record
This item is available under the Attribution-NonCommercial-NoDerivs 3.0 Ireland. No item may be reproduced for commercial purposes. For other possible restrictions on use please refer to the publisher's URL where this is made available, or to notes contained in the item itself. Other terms may apply.