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Patterning Nanostructured, Synthetic, Polymeric Receptors by Simultaneous Projection Photolithography, Nanomolding, and Molecular Imprinting
Author(s) -
Linares Ana V.,
FalcimaigneCordin Aude,
Gheber Levi A.,
Haupt Karsten
Publication year - 2011
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.201100248
Subject(s) - materials science , molecular imprinting , nanotechnology , photolithography , biosensor , biochip , molecularly imprinted polymer , polymer , imprinting (psychology) , microfabrication , template , chemistry , selectivity , organic chemistry , fabrication , biochemistry , alternative medicine , pathology , composite material , gene , catalysis , medicine
Microscope projection photolithography is combined with nanomolding and molecular imprinting for the fast microfabrication of molecularly imprinted polymer (MIP) arrays in the form of micrometric islands of nanofilaments. Dot diameters from 70–90 μm are easily obtained using a 10× objective and a photomask carrying the desired pattern. The dots are composed of parallel nanofilaments of a high aspect ratio, 150 nm in diameter and several micrometers in length, which are obtained through a nanomolding procedure on porous alumina. The arrays are molecularly imprinted with the small molecule fluorescein or with the protein myoglobin. The fluorescein MIP arrays are able to specifically recognize their target, as demonstrated by fluorescence microscopy. A four‐fold increase in binding capacity and imprinting factor (IF = 13) is obtained compared to non‐nanostructured porous dots. Imprinting of the nanofilament arrays with the protein myoglobin as the template is also possible and allows for a high imprinting factor of 4.3. Such nanostructured microarrays of synthetic receptors obtained by projection photolithography have great potential in biosensor and biochip development.