In situ synthesis of SERS-active Au@POM nanostructures in a microfluidic device for real-time detection of water pollutants
Fecha
2020Autor
Versión
Acceso abierto / Sarbide irekia
Tipo
Artículo / Artikulua
Versión
Versión aceptada / Onetsi den bertsioa
Identificador del proyecto
ES/1PE/CTQ2016-79419-R
Impacto
|
10.1021/acsami.0c06725
Resumen
We present a simple, versatile and low-cost approach for the preparation of
SERS-active regions within a microfluidic channel 50 cm in length. The approach involves the
UV-light-driven formation of polyoxometalate-decorated gold nanostructures, Au@POM (POM:
H3PW12O40 (PW) and H3PMo12O40 (PMo)), that self-assemble in situ on the surface of the
PDMS microchannels without any extra functionalization ...
[++]
We present a simple, versatile and low-cost approach for the preparation of
SERS-active regions within a microfluidic channel 50 cm in length. The approach involves the
UV-light-driven formation of polyoxometalate-decorated gold nanostructures, Au@POM (POM:
H3PW12O40 (PW) and H3PMo12O40 (PMo)), that self-assemble in situ on the surface of the
PDMS microchannels without any extra functionalization procedure. The fabricated LoCs were
characterized by SEM, UV-Vis, Raman, XRD and XPS techniques. The SERS activity of the
resulting Au@POM–coated lab-on-a-chip (LoC) devices was evaluated in both static and flow
conditions using Rhodamine R6G. The SERS response of Au@PW–based LoCs was found
superior to Au@PMo counterparts and outstanding when compared to reported data on
metal@POM nanocomposites. We demonstrate the potentialities of both Au@POM–coated
LoCs as analytical platforms for real time detection of the organophosphorous pesticide
Paraoxon-methyl at 10-6 M concentration level. [--]
Materias
Large SERS-active area,
Spatial uniformity of SERS response,
Charge transfer mechanism,
POM assisted interactions,
Organophosphorous pesticides,
Chip reusability
Editor
ACS
Publicado en
Applied Materials & Interfaces, 2020, 12, 36458-36467
Departamento
Universidad Pública de Navarra/Nafarroako Unibertsitate Publikoa. Institute for Advanced Materials and Mathematics - INAMAT2
Versión del editor
Entidades Financiadoras
Financial support from Gobierno de Navarra (grants PC025-026 and PC052-053) and MINECO (grant CTQ2016-79419-R) is gratefully acknowledged. I.P. and S.R. thank Obra Social la Caixa, Fundacion Caja Navarra, and UPNA for their research contracts in the framework of the programs 'Ayudas Postdoctorales' and 'Captacion del Talento'.