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Facile synthesis of core/shell ZnO/ZnS nanofibers by electrospinning and gas-phase sulfidation for biosensor applications

Authors:

  • Anna Baranowska-Korczyc,
  • Kamil Sobczak,
  • Piotr Dłuzewski,
  • Anna Reszka,
  • Bogdan J. Kowalski,
  • Łukasz Kłopotowski,
  • Danek Elbaum,
  • Krzysztof Fronc

Abstract

This study describes a new method of passivating ZnO nanofiber-based devices with a ZnS layer. This one-step process was carried out in H2S gas at room temperature, and resulted in the formation of core/shell ZnO/ZnS nanofibers. This study presents the structural, optical and electrical properties of ZnO/ZnS nanofibers formed by a 2 nm ZnS sphalerite crystal shell covering a 5 nm ZnO wurtzite crystal core. The passivation process prevented free carriers from capture by oxygen molecules and significantly reduced the impact of O2 on nanostructure conductivity. The conductivity of the nanofibers was increased by three orders of magnitude after the sulfidation, the photoresponse time was reduced from 1500 s to 30 s, and the cathodoluminescence intensity increased with the sulfidation time thanks to the removal of ZnO surface defects by passivation. The ZnO/ZnS nanofibers were stable in water for over 30 days, and in phosphate buffers of acidic, neutral and alkaline pH for over 3 days. The by-products of the passivation process did not affect the conductivity of the devices. The potential of ZnO/ZnS nanofibers for protein biosensing is demonstrated using biotin and streptavidin as a model system. The presented ZnS shell preparation method can facilitate the construction of future sensors and protects the ZnO surface from dissolving in a biological environment.

Metrics

Record ID
UAM6a3adfd417244055aa456064b57baed5
Author
Anna Baranowska-Korczyc Anna Baranowska-Korczyc,, NanoBiomedical Centre (Cb/CN)Centra badawcze [nowa struktura organizacyjna] (Cb)
Kamil Sobczak Kamil Sobczak,, External affiliation of publication: Institute of Physics of the Polish Academy of Sciences
Piotr Dłuzewski Piotr Dłuzewski,, External affiliation of publication: Institute of Physics of the Polish Academy of Sciences
Anna Reszka Anna Reszka,, External affiliation of publication: Institute of Physics of the Polish Academy of Sciences
Bogdan J. Kowalski Bogdan J. Kowalski,, External affiliation of publication: Institute of Physics of the Polish Academy of Sciences
Łukasz Kłopotowski Łukasz Kłopotowski,, External affiliation of publication: Institute of Physics of the Polish Academy of Sciences
Danek Elbaum Danek Elbaum,, External affiliation of publication: Institute of Physics of the Polish Academy of Sciences
Krzysztof Fronc Krzysztof Fronc,, External affiliation of publication: Institute of Physics of the Polish Academy of Sciences
Journal series
Physical Chemistry Chemical Physics, ISSN 1463-9076
Issue year
2015
Vol
17
Pages
24029-24037
ASJC Classification
1606 Physical and Theoretical Chemistry; 3100 General Physics and Astronomy
DOI
DOI:10.1039/c5cp02278a Opening in a new tab
Language
(en) English
Score (nominal)
40
Score source
journalList
Score
Publication indicators
Scopus Citations = 16; Scopus SNIP: 2015 = 1.244; WoS Impact Factor: 2015 (2 years) = 4.449 - 2015 (5 years) =4.273

Cite

RDF
Uniform Resource Identifier
https://researchportal.amu.edu.pl/info/article/UAM6a3adfd417244055aa456064b57baed5/
URN
urn:amu-prod:UAM6a3adfd417244055aa456064b57baed5

* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or PerishOpening in a new tab system.

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