Limits...
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.


Related in: MedlinePlus

Schematic of Fe3O4 nanodots fabrication.(a) Deposition of PS-b-PEO on the ITO glass substrate. (b) Wet etch removal of PEO and formation of a porous template. (c) Deposition of iron nitrate solution on the PS template. (d) Formation of Fe3O4 dots after PS removal using UV/Ozone.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC4542519&req=5

f1: Schematic of Fe3O4 nanodots fabrication.(a) Deposition of PS-b-PEO on the ITO glass substrate. (b) Wet etch removal of PEO and formation of a porous template. (c) Deposition of iron nitrate solution on the PS template. (d) Formation of Fe3O4 dots after PS removal using UV/Ozone.

Mentions: As-coated BCP films exhibit little sign of ordered microphase separated patterns prior to solvent annealing. Figure 1 schematically illustrates the solvent annealing of the films resulted in formation of ordered arrangements of hexagonally packed PEO cylinders (vertical to the surface plane) within a PS matrix. Figure 2a,c show representative tapping mode AFM images of sample ALW and BHW high and low molecular weight samples (see below) after solvent annealing. The FFT (Fourier filtered) patterns shown in the insets of the Fig. 2a,c confirm the periodic nature of the BCP patterns. The films are of regular thicknesses of 25 nm (ALW) and 40 nm (BHW) with little signs of de-wetting and are well-ordered across the entire substrate. The corresponding measured average cylinder centre to centre distances and PEO cylinder diameters for ALW are 32 and 17 nm respectively and the corresponding values for BHW are 42 and 19.3 nm.


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)

Schematic of Fe3O4 nanodots fabrication.(a) Deposition of PS-b-PEO on the ITO glass substrate. (b) Wet etch removal of PEO and formation of a porous template. (c) Deposition of iron nitrate solution on the PS template. (d) Formation of Fe3O4 dots after PS removal using UV/Ozone.
© Copyright Policy - open-access
Related In: Results  -  Collection

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

f1: Schematic of Fe3O4 nanodots fabrication.(a) Deposition of PS-b-PEO on the ITO glass substrate. (b) Wet etch removal of PEO and formation of a porous template. (c) Deposition of iron nitrate solution on the PS template. (d) Formation of Fe3O4 dots after PS removal using UV/Ozone.
Mentions: As-coated BCP films exhibit little sign of ordered microphase separated patterns prior to solvent annealing. Figure 1 schematically illustrates the solvent annealing of the films resulted in formation of ordered arrangements of hexagonally packed PEO cylinders (vertical to the surface plane) within a PS matrix. Figure 2a,c show representative tapping mode AFM images of sample ALW and BHW high and low molecular weight samples (see below) after solvent annealing. The FFT (Fourier filtered) patterns shown in the insets of the Fig. 2a,c confirm the periodic nature of the BCP patterns. The films are of regular thicknesses of 25 nm (ALW) and 40 nm (BHW) with little signs of de-wetting and are well-ordered across the entire substrate. The corresponding measured average cylinder centre to centre distances and PEO cylinder diameters for ALW are 32 and 17 nm respectively and the corresponding values for BHW are 42 and 19.3 nm.

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.


Related in: MedlinePlus