Fabrication of nanostrucuted substrates for application in surface enhanced Raman Scattering

• Grant number: 13/25108-9
• Support Opportunities: Scholarships in Brazil - Doctorate
• Start date: August 01, 2014
• End date: March 31, 2016
• Field of knowledge: Physical Sciences and Mathematics - Chemistry - Analytical Chemistry
• Agreement: Coordination of Improvement of Higher Education Personnel (CAPES)
• Principal Investigator: Dosil Pereira de Jesus
• Grantee: Grazielle de Oliveira Setti Gibin
• Host Institution: Instituto de Química (IQ). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil

Abstract

This research project is been developed since August 2011 and its goal is the fabrication of gold-covered nanostructured substrates for application in surface enhanced Raman scattering (SERS). Nanoparticles, nanowires and nanorods of ZnO and ITO were obtained on glass slides by two different methods: hydrothermal synthesis and sputtering. The nanostructured substrates were covered with a thin gold layer (~20nm) by sputtering and the SERS effect was investigated. For all the substrates, intensifications of the Raman signal in the range from 103 to 105 were obtained. These results were compared to the ones from commercial SERS substrates (Klarite®) and it was observed that the signal intensifications achieved were similar. Both fabrication methods are reproducible, but the sputtering method has the additional advantage of attaining more uniform nanostructured deposits.For the next steps of the project, the nanostructured substrates will be evaluated in analytical applications, aiming to detect target compounds. The enhancement factor will be determined, and analytical parameters such as linearity and detection and quantification limits will be obtained from calibration curves. Strategies to integrate the SERS substrates inside microchannels in microfluidic devices fabricated in glass/polydimethylsiloxane will be also investigated. These microfluidic devices will be evaluated in chemical analysis with SERS detection and their analytical parameters will also be studied. To the best of our knowledge, there are no reported papers about microfluidic devices with SERS substrates produced by sputtering. (AU)

Scientific publications

(4)

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

SETTI, G. O.; JOANNI, E.; POPPI, R. J.; DOS SANTOS, D. P.; DE JESUS, D. P.. Temporal drift in Raman signal intensity during SERS measurements performed on analytes in liquid solutions. ANALYST, v. 141, n. 17, p. 5071-5077, 2016. (13/22485-6, 13/25108-9, 13/22127-2)

SETTI, GRAZIELLE O.; MAMIAN-LOPEZ, MONICA B.; PESSOA, PRISCILA R.; POPPI, RONEI J.; JOANNI, EDNAN; JESUS, DOSIL P.. Sputtered gold-coated ITO nanowires by alternating depositions from Indium and ITO targets for application in surface-enhanced Raman scattering. Applied Surface Science, v. 347, p. 17-22, AUG 30 2015. (13/22485-6, 13/25108-9)

SETTI, GRAZIELLE O.; DE JESUS, DOSIL P.; JOANNI, EDNAN. Self-catalyzed carbon plasma-assisted growth of tin-doped indium oxide nanostructuresby the sputtering method. MATERIALS RESEARCH EXPRESS, v. 3, n. 10, OCT 2016. (13/22485-6, 08/57805-2, 13/25108-9, 13/22127-2)

JOANNI, EDNAN; PERESSINOTTO, JONNAS; DOMINGUES, PATRICIA SILVA; SETTI, GRAZIELLE DE OLIVEIRA; DE JESUS, DOSIL PEREIRA. Fabrication of molds for PDMS microfluidic devices by laser swelling of PMMA. RSC ADVANCES, v. 5, n. 32, p. 25089-25096, 2015. (13/22485-6, 13/25108-9)

Academic Publications

(References retrieved automatically from State of São Paulo Research Institutions)

GIBIN, Grazielle de Oliveira Setti. Growth of gold-covered oxide nanostructures for application in surface enhanced Raman scattering. 2016. Doctoral Thesis - Universidade Estadual de Campinas (UNICAMP). Instituto de Química Campinas, SP.