Preparation and Application of Poly(N-isopropylacrylamide) Hydrogel Coated Dip-Pen Nanolithography Probe via E-beam irradiation .
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초록
내용
Dip-pen nanolithography (DPN) is important technology to transfer micro- and nano- materials through water meniscus formed between the substrate and atomic force microscopy (AFM) probe. Poly(N-isopropylacrylamide) (pNIPAAm) is one of the thermo-responsive polymers with lower critical solution temperature (LCST) behavior, such as swelling (below the LCST) and shrinking (above the LCST) in solution. Moreover, direct temperature control of pNIPAAm enhance patterning arrays by optimizing the interactions of DPN probe and the surface. In this study, we report strategy to fabricate pNIPAAm hydrogel-coated AFM probe by E-beam irradiation. Using pNIPAAm-coated DPN probe, we have generated patterns of a large molecular weight materials. pNIPAAm hydrogel can be applied micro-and nano bio technology such as drug delivery system and bio sensor. Therefore, it is expected to be applied to various fields by improving the properties of the existing pNIPAAm hydrogel.