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Gold Nanostructured Surface for Electrochemical Sensing and Biosensing: Does Shape Matter?

Identifikátory výsledku

  • Kód výsledku v IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26220%2F16%3APU116282" target="_blank" >RIV/00216305:26220/16:PU116282 - isvavai.cz</a>

  • Výsledek na webu

    <a href="http://dx.doi.org/10.1080/00032719.2015.1043662" target="_blank" >http://dx.doi.org/10.1080/00032719.2015.1043662</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.1080/00032719.2015.1043662" target="_blank" >10.1080/00032719.2015.1043662</a>

Alternativní jazyky

  • Jazyk výsledku

    angličtina

  • Název v původním jazyce

    Gold Nanostructured Surface for Electrochemical Sensing and Biosensing: Does Shape Matter?

  • Popis výsledku v původním jazyce

    The construction of an electrochemical sensor based on a gold working electrode modified with gold nanostructures was achieved by galvanic deposition into an anodic alumina nanoporous template. Two approaches were investigated to fabricate the nanostructures of various sizes and shapes. First, gold deposition was performed through a thin alumina template resulting in the production of nanorods. In the second approach, alumina pores were widened to form cup-shaped nanostructures. The detailed topography of the nanostructured surfaces was characterized by scanning electron microscopy. The lengths and the diameters of the nanostructures were anticipated to have a significant influence on the surface area and thus on the capacity to promote electron-transfer reactions. This dependence was investigated by electrochemical impedance spectroscopy and cyclic voltammetry. The functionalization of electrode surface with 11-mercaptoundecanoic acid provided a basis for further bonding with analytes. A modified Randles equivalent circuit model with a constant phase element was used to interpret the impedance spectra. The interfacial properties of the modified electrodes were also evaluated by cyclic voltammetry in the presence of the Fe(CN)(6)(3-/4-) redox couple as a probe. The results showed that the voltammetric behavior of the probe was influenced by surface modification. The accumulation of 11-mercaptoundecanoic acid on the nanostructured electrode surface did not result in the expected increase in charge-transfer resistance and the decreased capacitance, unlike the cup-shaped nanostructured electrode.

  • Název v anglickém jazyce

    Gold Nanostructured Surface for Electrochemical Sensing and Biosensing: Does Shape Matter?

  • Popis výsledku anglicky

    The construction of an electrochemical sensor based on a gold working electrode modified with gold nanostructures was achieved by galvanic deposition into an anodic alumina nanoporous template. Two approaches were investigated to fabricate the nanostructures of various sizes and shapes. First, gold deposition was performed through a thin alumina template resulting in the production of nanorods. In the second approach, alumina pores were widened to form cup-shaped nanostructures. The detailed topography of the nanostructured surfaces was characterized by scanning electron microscopy. The lengths and the diameters of the nanostructures were anticipated to have a significant influence on the surface area and thus on the capacity to promote electron-transfer reactions. This dependence was investigated by electrochemical impedance spectroscopy and cyclic voltammetry. The functionalization of electrode surface with 11-mercaptoundecanoic acid provided a basis for further bonding with analytes. A modified Randles equivalent circuit model with a constant phase element was used to interpret the impedance spectra. The interfacial properties of the modified electrodes were also evaluated by cyclic voltammetry in the presence of the Fe(CN)(6)(3-/4-) redox couple as a probe. The results showed that the voltammetric behavior of the probe was influenced by surface modification. The accumulation of 11-mercaptoundecanoic acid on the nanostructured electrode surface did not result in the expected increase in charge-transfer resistance and the decreased capacitance, unlike the cup-shaped nanostructured electrode.

Klasifikace

  • Druh

    J<sub>imp</sub> - Článek v periodiku v databázi Web of Science

  • CEP obor

  • OECD FORD obor

    10405 - Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis)

Návaznosti výsledku

  • Projekt

    <a href="/cs/project/ED2.1.00%2F03.0072" target="_blank" >ED2.1.00/03.0072: Centrum senzorických, informačních a komunikačních systémů (SIX)</a><br>

  • Návaznosti

    P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Ostatní

  • Rok uplatnění

    2016

  • Kód důvěrnosti údajů

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

Údaje specifické pro druh výsledku

  • Název periodika

    ANALYTICAL LETTERS

  • ISSN

    0003-2719

  • e-ISSN

    1532-236X

  • Svazek periodika

    49

  • Číslo periodika v rámci svazku

    1

  • Stát vydavatele periodika

    US - Spojené státy americké

  • Počet stran výsledku

    16

  • Strana od-do

    135-151

  • Kód UT WoS článku

    000363048900012

  • EID výsledku v databázi Scopus

    2-s2.0-84944937012