Detail publikace

Nanostructured Gold Microelectrode Array for Ultrasensitive Detection of Heavy Metal Contamination

PODEŠVA, P. GABLECH, I. NEUŽIL, P.

Originální název

Nanostructured Gold Microelectrode Array for Ultrasensitive Detection of Heavy Metal Contamination

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

Availability of potable water is a problem especially in developing countries as their water sources are often contaminated biologically as well as by heavy metals. Electrochemical methods are suitable for field application to monitor heavy metal contents. Noble metal electrodes with large surface areas are the subject of intensive development as they can yield an improved signal-to-noise ratio, enhanced sensitivity, and lower limits of detection (LOD). Here, we present a nanostructured Au microelectrode array prepared by selective electrodeposition in lithographically defined circles within a partially cross-linked gelatin layer. This method increased its surface area by a factor of ≈ 1440 in comparison with an original lithography-based prepared array. The Au surface properties can be tailored by degree of gelatin layer crosslinking. We used this array for an ultrasensitive detection of the As3+ ions content by stripping voltammetry achieving LOD of ≈ 0.0212 parts per billion (signal-to-noise ratio = 3.3), 470 × below the content limit recommended by World Health Organization for potable water. These nanostructured arrays we be used to detect ions of other metals such as Cr, Cd, Hg, Cu and Sb. In combination with a portable electrochemical device we can envision an ultrasensitive heavy metal detection system for field application to monitor heavy metal contamination.

Klíčová slova

Heavy metal detection, nanostructured gold, microelectrodes

Autoři

PODEŠVA, P.; GABLECH, I.; NEUŽIL, P.

Vydáno

16. 1. 2018

Nakladatel

American Chemical Society

Místo

Washington DC, USA

ISSN

1520-6882

Periodikum

Analytical Chemistry

Ročník

90

Číslo

2

Stát

Spojené státy americké

Strany od

1161

Strany do

1167

Strany počet

7

URL

https://pubs.acs.org/doi/abs/10.1021/acs.analchem.7b03725

BibTex

@article{BUT142139,
  author="PODEŠVA, P. and GABLECH, I. and NEUŽIL, P.",
  title="Nanostructured Gold Microelectrode Array for Ultrasensitive Detection of Heavy Metal Contamination",
  journal="Analytical Chemistry",
  year="2018",
  volume="90",
  number="2",
  pages="1161--1167",
  doi="10.1021/acs.analchem.7b0372",
  issn="1520-6882",
  url="https://pubs.acs.org/doi/abs/10.1021/acs.analchem.7b03725"
}