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 (...

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Autores principales:	Maria João Oliveira, Pedro Quaresma, Miguel Peixoto de Almeida, Andreia Araújo, Eulália Pereira, Elvira Fortunato, Rodrigo Martins, Ricardo Franco, Hugo Águas
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/2c285b50c2554cd8a7ac39046afa6b18
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spelling	oai:doaj.org-article:2c285b50c2554cd8a7ac39046afa6b182021-12-02T16:06:36ZOffice paper decorated with silver nanostars - an alternative cost effective platform for trace analyte detection by SERS10.1038/s41598-017-02484-82045-2322https://doaj.org/article/2c285b50c2554cd8a7ac39046afa6b182017-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-02484-8https://doaj.org/toc/2045-2322Abstract 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 ≈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.Maria João OliveiraPedro QuaresmaMiguel Peixoto de AlmeidaAndreia AraújoEulália PereiraElvira FortunatoRodrigo MartinsRicardo FrancoHugo ÁguasNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-14 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Maria João Oliveira Pedro Quaresma Miguel Peixoto de Almeida Andreia Araújo Eulália Pereira Elvira Fortunato Rodrigo Martins Ricardo Franco Hugo Águas Office paper decorated with silver nanostars - an alternative cost effective platform for trace analyte detection by SERS
description	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 ≈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.
format	article
author	Maria João Oliveira Pedro Quaresma Miguel Peixoto de Almeida Andreia Araújo Eulália Pereira Elvira Fortunato Rodrigo Martins Ricardo Franco Hugo Águas
author_facet	Maria João Oliveira Pedro Quaresma Miguel Peixoto de Almeida Andreia Araújo Eulália Pereira Elvira Fortunato Rodrigo Martins Ricardo Franco Hugo Águas
author_sort	Maria João Oliveira
title	Office paper decorated with silver nanostars - an alternative cost effective platform for trace analyte detection by SERS
title_short	Office paper decorated with silver nanostars - an alternative cost effective platform for trace analyte detection by SERS
title_full	Office paper decorated with silver nanostars - an alternative cost effective platform for trace analyte detection by SERS
title_fullStr	Office paper decorated with silver nanostars - an alternative cost effective platform for trace analyte detection by SERS
title_full_unstemmed	Office paper decorated with silver nanostars - an alternative cost effective platform for trace analyte detection by SERS
title_sort	office paper decorated with silver nanostars - an alternative cost effective platform for trace analyte detection by sers
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/2c285b50c2554cd8a7ac39046afa6b18
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_version_	1718384952112840704

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

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