Office paper decorated with silver nanostars-an alternative cost effective platform for trace analyte detection by SERS

Maria João Oliveira, Pedro Quaresma, Miguel Peixoto De Almeida, Andreia Araújo, Eulália Pereira, Elvira Fortunato, Rodrigo Martins, Ricardo Franco, Hugo Águas

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

For analytical applications in portable sensors to be used in the point-of-need, low-cost SERS substrates using paper as a base, are an alternative. In this work, SERS substrates were produced on two different types of paper: A high porosity paper (Whatman no. 1); and a low porosity paper (commercially available office paper, Portucel Soporcel). Solutions containing spherical silver nanoparticles (AgNPs) and silver nanostars (AgNSs) were separately drop-casted on hydrophilic wells patterned on the papers. The porosity of the paper was found to play a determinant role on the AgNP and AgNS distribution along the paper fibres, with most of the nanoparticles being retained at the illuminated surface of the office paper substrate. The highest SERS enhancements were obtained for the office paper substrate, with deposited AgNSs. A limit of detection for rhodamine-6G as low as 11.4 ± 0.2 pg could be achieved, with an analytical enhancement factor of â ‰107 for this specific analyte. The well patterning technique allowed good signal uniformity (RSD of 1.7%). Besides, these SERS substrates remained stable after 5 weeks of storage (RSD of 7.3%). Paper-induced aggregation of AgNPs was found to be a viable alternative to the classical salt-induced aggregation, to obtain a highly sensitive SERS substrates.

Original languageEnglish
Article number2480
JournalScientific Reports
Volume7
Issue number1
DOIs
Publication statusPublished - 1 Dec 2017

Fingerprint

Silver
Porosity
Costs and Cost Analysis
Nanoparticles
Limit of Detection
Salts

Keywords

  • ENHANCED RAMAN-SPECTROSCOPY
  • COATED FILTER-PAPER
  • RHODAMINE 6G
  • SCATTERING SUBSTRATE
  • CHEMICAL-DETECTION
  • GOLD
  • NANOPARTICLES
  • FABRICATION
  • MOLECULES
  • SIZE

Cite this

Oliveira, Maria João ; Quaresma, Pedro ; De Almeida, Miguel Peixoto ; Araújo, Andreia ; Pereira, Eulália ; Fortunato, Elvira ; Martins, Rodrigo ; Franco, Ricardo ; Águas, Hugo. / Office paper decorated with silver nanostars-an alternative cost effective platform for trace analyte detection by SERS. In: Scientific Reports. 2017 ; Vol. 7, No. 1.
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title = "Office paper decorated with silver nanostars-an alternative cost effective platform for trace analyte detection by SERS",
abstract = "For analytical applications in portable sensors to be used in the point-of-need, low-cost SERS substrates using paper as a base, are an alternative. In this work, SERS substrates were produced on two different types of paper: A high porosity paper (Whatman no. 1); and a low porosity paper (commercially available office paper, Portucel Soporcel). Solutions containing spherical silver nanoparticles (AgNPs) and silver nanostars (AgNSs) were separately drop-casted on hydrophilic wells patterned on the papers. The porosity of the paper was found to play a determinant role on the AgNP and AgNS distribution along the paper fibres, with most of the nanoparticles being retained at the illuminated surface of the office paper substrate. The highest SERS enhancements were obtained for the office paper substrate, with deposited AgNSs. A limit of detection for rhodamine-6G as low as 11.4 ± 0.2 pg could be achieved, with an analytical enhancement factor of {\^a} ‰107 for this specific analyte. The well patterning technique allowed good signal uniformity (RSD of 1.7{\%}). Besides, these SERS substrates remained stable after 5 weeks of storage (RSD of 7.3{\%}). Paper-induced aggregation of AgNPs was found to be a viable alternative to the classical salt-induced aggregation, to obtain a highly sensitive SERS substrates.",
keywords = "ENHANCED RAMAN-SPECTROSCOPY, COATED FILTER-PAPER, RHODAMINE 6G, SCATTERING SUBSTRATE, CHEMICAL-DETECTION, GOLD, NANOPARTICLES, FABRICATION, MOLECULES, SIZE",
author = "Oliveira, {Maria Jo{\~a}o} and Pedro Quaresma and {De Almeida}, {Miguel Peixoto} and Andreia Ara{\'u}jo and Eul{\'a}lia Pereira and Elvira Fortunato and Rodrigo Martins and Ricardo Franco and Hugo {\'A}guas",
note = "FCT (Portuguese Foundation for Science and Technology) under the project DISERTOX number PTDC/CTM-NAN/2912/2014 and CENIMAT/i3N by FEDER funds through the COMPETE 2020 Programme and National Funds through FCT under the project number POCI-01-0145-FEDER- 007688, Reference UID/CTM/50025/2013. Unidade de Ciencias Biomoleculares Aplicadas-UCIBIO was financed by Portuguese national funds from FCT/MEC (UID/Multi/04378/2013) and co-financed by the ERDF under the PT2020 Partnership Agreement (POCI-01-0145-FEDER-007728). LAQV-Laboratorio associado para a Quimica Verde was partly financed by the European Union (FEDER funds through COMPETE) and National Funds (FCT, Fundacao para a Ciencia e Tecnologia), under the Partnership Agreement PT2020 through project UID/QUI/50006/2013-POCI/01/0145/FEDER/007265 (LAQV/REQUIMTE) and Programa Operacional Regional do Norte (ON. 2), under the Quadro de Referencia Estrategico Nacional (QREN) and funded by Fundo Europeu de Desenvolvimento Regional (Feder) NORTE-01-0145-FEDER-000011. A Araujo was funded by the Portuguese Science Foundation (FCT-MCTES) through grant SFRH/BD/85587/2012. M Almeida was funded by the Portuguese Science Foundation (FCT-MCTES) through grant SFRH/BD/95983/2013 in program POCH. The authors thank the Conservation and Restoration Department, FCT/UNL and LAQV, REQUIMTE for the use of the Raman spectrometer.",
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Office paper decorated with silver nanostars-an alternative cost effective platform for trace analyte detection by SERS. / Oliveira, Maria João; Quaresma, Pedro; De Almeida, Miguel Peixoto; Araújo, Andreia; Pereira, Eulália; Fortunato, Elvira; Martins, Rodrigo; Franco, Ricardo; Águas, Hugo.

In: Scientific Reports, Vol. 7, No. 1, 2480, 01.12.2017.

Research output: Contribution to journalArticle

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AU - Oliveira, Maria João

AU - Quaresma, Pedro

AU - De Almeida, Miguel Peixoto

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AU - Pereira, Eulália

AU - Fortunato, Elvira

AU - Martins, Rodrigo

AU - Franco, Ricardo

AU - Águas, Hugo

N1 - FCT (Portuguese Foundation for Science and Technology) under the project DISERTOX number PTDC/CTM-NAN/2912/2014 and CENIMAT/i3N by FEDER funds through the COMPETE 2020 Programme and National Funds through FCT under the project number POCI-01-0145-FEDER- 007688, Reference UID/CTM/50025/2013. Unidade de Ciencias Biomoleculares Aplicadas-UCIBIO was financed by Portuguese national funds from FCT/MEC (UID/Multi/04378/2013) and co-financed by the ERDF under the PT2020 Partnership Agreement (POCI-01-0145-FEDER-007728). LAQV-Laboratorio associado para a Quimica Verde was partly financed by the European Union (FEDER funds through COMPETE) and National Funds (FCT, Fundacao para a Ciencia e Tecnologia), under the Partnership Agreement PT2020 through project UID/QUI/50006/2013-POCI/01/0145/FEDER/007265 (LAQV/REQUIMTE) and Programa Operacional Regional do Norte (ON. 2), under the Quadro de Referencia Estrategico Nacional (QREN) and funded by Fundo Europeu de Desenvolvimento Regional (Feder) NORTE-01-0145-FEDER-000011. A Araujo was funded by the Portuguese Science Foundation (FCT-MCTES) through grant SFRH/BD/85587/2012. M Almeida was funded by the Portuguese Science Foundation (FCT-MCTES) through grant SFRH/BD/95983/2013 in program POCH. The authors thank the Conservation and Restoration Department, FCT/UNL and LAQV, REQUIMTE for the use of the Raman spectrometer.

PY - 2017/12/1

Y1 - 2017/12/1

N2 - For analytical applications in portable sensors to be used in the point-of-need, low-cost SERS substrates using paper as a base, are an alternative. In this work, SERS substrates were produced on two different types of paper: A high porosity paper (Whatman no. 1); and a low porosity paper (commercially available office paper, Portucel Soporcel). Solutions containing spherical silver nanoparticles (AgNPs) and silver nanostars (AgNSs) were separately drop-casted on hydrophilic wells patterned on the papers. The porosity of the paper was found to play a determinant role on the AgNP and AgNS distribution along the paper fibres, with most of the nanoparticles being retained at the illuminated surface of the office paper substrate. The highest SERS enhancements were obtained for the office paper substrate, with deposited AgNSs. A limit of detection for rhodamine-6G as low as 11.4 ± 0.2 pg could be achieved, with an analytical enhancement factor of â ‰107 for this specific analyte. The well patterning technique allowed good signal uniformity (RSD of 1.7%). Besides, these SERS substrates remained stable after 5 weeks of storage (RSD of 7.3%). Paper-induced aggregation of AgNPs was found to be a viable alternative to the classical salt-induced aggregation, to obtain a highly sensitive SERS substrates.

AB - For analytical applications in portable sensors to be used in the point-of-need, low-cost SERS substrates using paper as a base, are an alternative. In this work, SERS substrates were produced on two different types of paper: A high porosity paper (Whatman no. 1); and a low porosity paper (commercially available office paper, Portucel Soporcel). Solutions containing spherical silver nanoparticles (AgNPs) and silver nanostars (AgNSs) were separately drop-casted on hydrophilic wells patterned on the papers. The porosity of the paper was found to play a determinant role on the AgNP and AgNS distribution along the paper fibres, with most of the nanoparticles being retained at the illuminated surface of the office paper substrate. The highest SERS enhancements were obtained for the office paper substrate, with deposited AgNSs. A limit of detection for rhodamine-6G as low as 11.4 ± 0.2 pg could be achieved, with an analytical enhancement factor of â ‰107 for this specific analyte. The well patterning technique allowed good signal uniformity (RSD of 1.7%). Besides, these SERS substrates remained stable after 5 weeks of storage (RSD of 7.3%). Paper-induced aggregation of AgNPs was found to be a viable alternative to the classical salt-induced aggregation, to obtain a highly sensitive SERS substrates.

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KW - RHODAMINE 6G

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KW - CHEMICAL-DETECTION

KW - GOLD

KW - NANOPARTICLES

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KW - MOLECULES

KW - SIZE

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