Large-Scale, Ultrasensitive, Highly Reproducible and Reusable Smart SERS Platform Based on PNIPAm-Grafted Gold Grating

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F44555601%3A13440%2F17%3A43892928" target="_blank" >RIV/44555601:13440/17:43892928 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11310/17:10367549 RIV/60461373:22310/17:43914150

Výsledek na webu

<a href="http://dx.doi.org/10.1002/cnma.201600284" target="_blank" >http://dx.doi.org/10.1002/cnma.201600284</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/cnma.201600284" target="_blank" >10.1002/cnma.201600284</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Large-Scale, Ultrasensitive, Highly Reproducible and Reusable Smart SERS Platform Based on PNIPAm-Grafted Gold Grating

Popis výsledku v původním jazyce

A smart plasmonic sensor based on periodic gold gratings grafted with poly(N-isopropyl acrylamide) (PNIPAm) has been designed and realized. A periodic gold structure was created on the polymer backing with an excimer laser (1x2cm(2) modified area) and was subsequently covered by thin gold film. In the next step, a 7nm thick PNIPAm layer was grafted to the gold surface through a two-step procedure: covalent attachment of 4-carboxybenzil groups followed by carboxyl groups activation and their coupling with amino-terminated PNIPAm. Surface properties of the prepared structure and their switchable behavior were investigated using refractometry, wettability measurements, AFM in water, cyclic voltammetry, and pH- and temperature-dependent Z-potential measurements. The structure enables effective entrapment and SERS detection of azo dyes, significant reduction of minimal detectable concentration of target molecules, and a detection limit down to femtomolar concentrations. Excitation of plasmons on the well-ordered surface structure also gives excellent reproducibility for SERS along the particular sample surface and as well as on different samples. Additionally, the reversible switching of wettability under repeated temperature changes on the gold plasmonic platform allows multiple uses of the developed system.

Název v anglickém jazyce

Large-Scale, Ultrasensitive, Highly Reproducible and Reusable Smart SERS Platform Based on PNIPAm-Grafted Gold Grating

Popis výsledku anglicky

A smart plasmonic sensor based on periodic gold gratings grafted with poly(N-isopropyl acrylamide) (PNIPAm) has been designed and realized. A periodic gold structure was created on the polymer backing with an excimer laser (1x2cm(2) modified area) and was subsequently covered by thin gold film. In the next step, a 7nm thick PNIPAm layer was grafted to the gold surface through a two-step procedure: covalent attachment of 4-carboxybenzil groups followed by carboxyl groups activation and their coupling with amino-terminated PNIPAm. Surface properties of the prepared structure and their switchable behavior were investigated using refractometry, wettability measurements, AFM in water, cyclic voltammetry, and pH- and temperature-dependent Z-potential measurements. The structure enables effective entrapment and SERS detection of azo dyes, significant reduction of minimal detectable concentration of target molecules, and a detection limit down to femtomolar concentrations. Excitation of plasmons on the well-ordered surface structure also gives excellent reproducibility for SERS along the particular sample surface and as well as on different samples. Additionally, the reversible switching of wettability under repeated temperature changes on the gold plasmonic platform allows multiple uses of the developed system.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2017

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

ChemNanoMat

ISSN

2199-692X

e-ISSN

—

Svazek periodika

3

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

10

Strana od-do

135-144

Kód UT WoS článku

000394911300008

EID výsledku v databázi Scopus

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