TY - JOUR
T1 - Ultrasensitive detection of a 1-pyrenecarboxylic acid by surface enhanced Raman scattering hot spot with reduced graphene oxide/silver nanoparticles composites
AU - Sakho, El Hadji Mamour
AU - Oluwafemi, Oluwatobi S.
AU - Saha, Abhijit
AU - Thomas, Sabu
AU - Kalarikkal, Nandakumar
N1 - Publisher Copyright:
© 2016 Elsevier B.V. All rights reserved.
PY - 2016/5/15
Y1 - 2016/5/15
N2 - This manuscript demonstrated a simple and efficient method to detect 1-pyrenecarboxylic acid dissolved in water solution at nanoscale level via surface enhanced Raman scattering hot spot with reduced graphene oxide/silver nanoparticles (Ag-NPs) nanocomposites (RGO/Ag-NPs). Ag-NPs were attached in situ onto RGO surface with different concentrations of AgNO3 in the presence of aqueous solution of 1-pyrenecarboxylic acid. The morphology and structures of the as-prepared samples were characterised with FT-IR, UV-vis absorption, DLS, Zeta potentials, Raman spectroscopy, TEM and XRD. At higher AgNO3 concentration, Ag-NPs get aggregated onto the surface of RGO and created surface enhanced Raman spectroscopy (SERS) hot spot which detect 1-pyrenecarboxylic acid due to the greatly enhanced electromagnetic field. This novel concept can be extended for sensing different water pollutants including polycyclic aromatic hydrocarbons and benzene derivatives.
AB - This manuscript demonstrated a simple and efficient method to detect 1-pyrenecarboxylic acid dissolved in water solution at nanoscale level via surface enhanced Raman scattering hot spot with reduced graphene oxide/silver nanoparticles (Ag-NPs) nanocomposites (RGO/Ag-NPs). Ag-NPs were attached in situ onto RGO surface with different concentrations of AgNO3 in the presence of aqueous solution of 1-pyrenecarboxylic acid. The morphology and structures of the as-prepared samples were characterised with FT-IR, UV-vis absorption, DLS, Zeta potentials, Raman spectroscopy, TEM and XRD. At higher AgNO3 concentration, Ag-NPs get aggregated onto the surface of RGO and created surface enhanced Raman spectroscopy (SERS) hot spot which detect 1-pyrenecarboxylic acid due to the greatly enhanced electromagnetic field. This novel concept can be extended for sensing different water pollutants including polycyclic aromatic hydrocarbons and benzene derivatives.
KW - 1-pyrenecarboxylic acid
KW - Graphene oxide
KW - Hot spot
KW - SERS
UR - http://www.scopus.com/inward/record.url?scp=84958966861&partnerID=8YFLogxK
U2 - 10.1016/j.matlet.2016.02.073
DO - 10.1016/j.matlet.2016.02.073
M3 - Article
AN - SCOPUS:84958966861
SN - 0167-577X
VL - 171
SP - 137
EP - 141
JO - Materials Letters
JF - Materials Letters
ER -