A highly efficient sensor platform using simply manufactured nanodot patterned substrates

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Rasappa, Sozaraj
Ghoshal, Tandra
Borah, Dipu
Senthamaraikannan, Ramsankar
Holmes, Justin D.
Morris, Michael A.
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Nature Publishing Group, Macmillan Publishers Limited
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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.
Nanoparticles , Ethanol , Nanocomposite , Oxidation , Dopamine , Arrays , Layer , Glassy carbon electrode , Hydrogen peroxide , Iron oxides
RASAPPA, S., GHOSHAL, T., BORAH, D., SENTHAMARAIKANNAN, R., HOLMES, J. D. & MORRIS, M. A. 2015. A Highly Efficient Sensor Platform Using Simply Manufactured Nanodot Patterned Substrates. Scientific Reports, 5:13270, 1-11. http://dx.doi.org/10.1038/srep13270