Highly sensitive detection of estradiol by a SERS sensor based on TiO2 covered with gold nanoparticles

被引：28

作者：

Brognara, Andrea ^{[1
,2
]}

Nasri, Ili F. Mohamad Ali ^{[3
]}

Bricchi, Beatrice R. ^{[1
]}

Li Bassi, Andrea ^{[1
]}

Gauchotte-Lindsay, Caroline ^{[3
]}

Ghidelli, Matteo ^{[1
,2
,4
]}

Lidgi-Guigui, Nathalie ^{[4
,5
]}

机构：

[1] Politecn Milan, Lab Mat Micro & Nanostrutturati, Dipartimento Energia, Via Ponzio 34-3, I-20133 Milan, Italy

[2] Max Planck Inst Eisenforsch GmbH, Dept Struct & Nano Micromech Mat, Max Planck Str 1, D-40237 Dusseldorf, Germany

[3] Univ Glasgow, James Watt Sch Engn, Rankine Bldg,Oakfield Ave, Glasgow G12 8LT, Lanark, Scotland

[4] Univ Sorbonne Paris Nord, Lab Sci Proc & Mat LSPM, CNRS, F-93430 Villetaneuse, France

[5] Univ Sorbonne Paris Nord, CSPBAT, UMR 7244, F-93430 Villetaneuse, France

来源：

BEILSTEIN JOURNAL OF NANOTECHNOLOGY | 2020年 / 11卷

关键词：

aptamer; Au nanoparticles; 17 beta estradiol (E2); plasmonics; sensor; surface-enhanced Raman scattering (SERS); TiO2; nanostructures; ENHANCED RAMAN-SCATTERING; AMPLIFIED DETECTION; AU NANOPARTICLES; WASTE-WATER; SILVER; SPECTROSCOPY; 17-BETA-ESTRADIOL; POLLUTANTS; ARRAYS;

D O I：

10.3762/bjnano.11.87

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

We propose the use of gold nanoparticles grown on the surface of nanoporous TiO2 films as surface -enhanced Raman scattering (SERS) sensors for the detection of 17 beta-estradiol. Gold deposition on top of a TiO2 surface leads to the formation of nanoparticles the plasmonic properties of which fulfil the requirements of a SERS sensor. The morphological and optical properties of the sur- face were investigated. Specifically, we demonstrate that the TiO2 background pressure during pulsed laser deposition and the annealing conditions offer control over the formation of Au nanoparticles with different sizes, shapes and distributions, yielding a versatile sensor. We have exploited the surface for the detection of 17 beta-estradiol, an emerging contaminant in environmental waters. We have found a limit of detection of 1 nM with a sensitivity allowing for a dynamic range of five orders of magnitude (up to 100 mu M).

引用

页码：1026 / 1035

页数：10

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