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Patterned Layers of a Semiconducting Polymer via Imprinting and Microwave-Assisted Grafting

Patterned Layers of a Semiconducting Polymer via Imprinting and Microwave-Assisted Grafting

Isaac W Moran, Sarav B Jhaveri, Kenneth R Carter

Small. 2008 Aug;4(8):1176-82.

PMID: 18651715

Abstract:

Enhancements in both the rate and extent of grafting of poly(9,9'-n-dihexyl fluorene) (PDHF) onto flat and nanopatterned crosslinked photopolymer films are described. Reactivity of the surfaces toward grafting via the Yamamoto-type Ni(0)-mediated coupling reaction is increased by synthesizing and incorporating 2,7-dibromo-9-fluorenyl methacrylate (DBFM, 2) as a new grafting agent. Varying the concentration of surface-embedded DBFM is shown to control both overall graft formation and fluorescence with a maximum thickness of up to 30 nm and peak emission at 407 nm for 40 wt% loading. In addition, microwave irradiation is introduced as an effective means to drive graft formation and thus allows fabrication of PDHF-functionalized surfaces in as little as 30 min. Both forms of improvement are extended to DBFM-embedded, nanocontact-molded features ranging in size from 100 microm to 100 nm in width and 60 nm in height. Microwave-assisted grafting from these patterned surfaces produces fluorescent features as imaged by optical microscopy and a corresponding increase in feature height as measured by atomic force microscopy.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP46969533	9-Fluorenyl methacrylate		46969-53-3	Price

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