title: Nanocomposite mesoporous ordered films for lab-on-chip intrinsic surface enhanced Raman scattering detection.
abstract: Mesoporous nanocomposite materials have been fabricated through integration of evaporation-induced self-assembly and deep X-ray lithography. Micropatterned films made using a mesoporous ordered silica matrix which contains silver nanoparticles have been obtained. The exposure of the mesoporous films to high energy X-rays, which are generated by a synchrotron source, produces several effects: the removal of the surfactant, the densification of the silica backbone and the formation of silver nanoparticles. This integrated process produces a nanocomposite material which has a 2D-hexagonal organized porosity and silver nanoparticles with a sharp size distribution around 5 nm. The patterned nanostructured films have been tested as a lab-on-chip device for intrinsic surface enhanced Raman scattering detection using a solution containing rhodamine 6G in ethanol and measuring Raman response as a function of laser power.
authors.affiliation: Laboratorio di Scienza dei Materiali e Nanotecnologie (LMNT), CR-INSTM, CNBS, Università di Sassari, Palazzo Pou Salid Piazza Duomo 6, 07041 Alghero SS, Italy.
authors.forename: Luca
authors.initials: L
authors.lastname: Malfatti
authors.forename: Paolo
authors.initials: P
authors.lastname: Falcaro
authors.forename: Benedetta
authors.initials: B
authors.lastname: Marmiroli
authors.forename: Heinz
authors.initials: H
authors.lastname: Amenitsch
authors.forename: Massimo
authors.initials: M
authors.lastname: Piccinini
authors.forename: Andrea
authors.initials: A
authors.lastname: Falqui
authors.forename: Plinio
authors.initials: P
authors.lastname: Innocenzi
mesh_terms: D000431:Ethanol / Q000737:chemistry; D056656:Lab-On-A-Chip Devices; D053768:Metal Nanoparticles / Q000737:chemistry; D053761:Nanocomposites / Q000737:chemistry*; D016062:Porosity; D012235:Rhodamines / Q000737:chemistry; D012834:Silver / Q000737:chemistry; D017550:Spectroscopy, Fourier Transform Infrared; D013059:Spectrum Analysis, Raman
chemical_list: D012235:Rhodamines; C026188:rhodamine 6G; D000431:Ethanol; D012834:Silver