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A Highly Efficient Sensor Platform Using Simply Manufactured Nanodot Patterned Substrates.

Rasappa S, Ghoshal T, Borah D, Senthamaraikannan R, Holmes JD, Morris MA - Sci Rep (2015)

Bottom Line: Highly dense iron oxide nanodots arrays that mimicked the original BCP pattern were prepared by an 'insitu' BCP inclusion methodology using poly(styrene)-block-poly(ethylene oxide) (PS-b-PEO).The dual detection of EtOH and H2O2 was clearly observed.The as-prepared nanodots have good long term thermal and chemical stability at the substrate and demonstrate promising electrocatalytic performance.

View Article: PubMed Central - PubMed

Affiliation: Materials Research Group, Department of Chemistry and Tyndall National Institute, University College Cork, Cork, Ireland.

ABSTRACT
Block copolymer (BCP) self-assembly is a low-cost means to nanopattern surfaces. Here, we use these nanopatterns to directly print arrays of nanodots onto a conducting substrate (Indium Tin Oxide (ITO) coated glass) for application as an electrochemical sensor for ethanol (EtOH) and hydrogen peroxide (H2O2) detection. The work demonstrates that BCP systems can be used as a highly efficient, flexible methodology for creating functional surfaces of materials. Highly dense iron oxide nanodots arrays that mimicked the original BCP pattern were prepared by an 'insitu' BCP inclusion methodology using poly(styrene)-block-poly(ethylene oxide) (PS-b-PEO). The electrochemical behaviour of these densely packed arrays of iron oxide nanodots fabricated by two different molecular weight PS-b-PEO systems was studied. The dual detection of EtOH and H2O2 was clearly observed. The as-prepared nanodots have good long term thermal and chemical stability at the substrate and demonstrate promising electrocatalytic performance.

No MeSH data available.


CV data showing electroxidation by Fe3O4 nanodots arrays for dual detection of EtOH and H2O2 at a scan rate of 50 mV s−1.
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f12: CV data showing electroxidation by Fe3O4 nanodots arrays for dual detection of EtOH and H2O2 at a scan rate of 50 mV s−1.

Mentions: CVs in Fig. 12 provide evidence for the simultaneous detection of EtOH and H2O2 using sample ALW and sample BHW. Two distinct oxidation peaks appears for both samples at ~0.12 V and ~0.32 V consistent with EtOH and H2O2 oxidation. The data suggest that dual detection of these molecules is possible even at these low peak separations of ~0.2 V. It might be argued that the nanostructured form of the iron oxide in this system and the crystalline morphology/phase enables rapid oxidation and reduction and enabling this dual detection. Electrochemical dual detection of these two compounds is a challenge but demonstrated here. It should also be noted that extensive retesting over a period of 1 month indicated no significant loss of sensitivity and response and illustrated the stability of these systems.


A Highly Efficient Sensor Platform Using Simply Manufactured Nanodot Patterned Substrates.

Rasappa S, Ghoshal T, Borah D, Senthamaraikannan R, Holmes JD, Morris MA - Sci Rep (2015)

CV data showing electroxidation by Fe3O4 nanodots arrays for dual detection of EtOH and H2O2 at a scan rate of 50 mV s−1.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4542519&req=5

f12: CV data showing electroxidation by Fe3O4 nanodots arrays for dual detection of EtOH and H2O2 at a scan rate of 50 mV s−1.
Mentions: CVs in Fig. 12 provide evidence for the simultaneous detection of EtOH and H2O2 using sample ALW and sample BHW. Two distinct oxidation peaks appears for both samples at ~0.12 V and ~0.32 V consistent with EtOH and H2O2 oxidation. The data suggest that dual detection of these molecules is possible even at these low peak separations of ~0.2 V. It might be argued that the nanostructured form of the iron oxide in this system and the crystalline morphology/phase enables rapid oxidation and reduction and enabling this dual detection. Electrochemical dual detection of these two compounds is a challenge but demonstrated here. It should also be noted that extensive retesting over a period of 1 month indicated no significant loss of sensitivity and response and illustrated the stability of these systems.

Bottom Line: Highly dense iron oxide nanodots arrays that mimicked the original BCP pattern were prepared by an 'insitu' BCP inclusion methodology using poly(styrene)-block-poly(ethylene oxide) (PS-b-PEO).The dual detection of EtOH and H2O2 was clearly observed.The as-prepared nanodots have good long term thermal and chemical stability at the substrate and demonstrate promising electrocatalytic performance.

View Article: PubMed Central - PubMed

Affiliation: Materials Research Group, Department of Chemistry and Tyndall National Institute, University College Cork, Cork, Ireland.

ABSTRACT
Block copolymer (BCP) self-assembly is a low-cost means to nanopattern surfaces. Here, we use these nanopatterns to directly print arrays of nanodots onto a conducting substrate (Indium Tin Oxide (ITO) coated glass) for application as an electrochemical sensor for ethanol (EtOH) and hydrogen peroxide (H2O2) detection. The work demonstrates that BCP systems can be used as a highly efficient, flexible methodology for creating functional surfaces of materials. Highly dense iron oxide nanodots arrays that mimicked the original BCP pattern were prepared by an 'insitu' BCP inclusion methodology using poly(styrene)-block-poly(ethylene oxide) (PS-b-PEO). The electrochemical behaviour of these densely packed arrays of iron oxide nanodots fabricated by two different molecular weight PS-b-PEO systems was studied. The dual detection of EtOH and H2O2 was clearly observed. The as-prepared nanodots have good long term thermal and chemical stability at the substrate and demonstrate promising electrocatalytic performance.

No MeSH data available.