期刊
SMALL
卷 4, 期 8, 页码 1176-1182出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smll.200701251
关键词
conjugated polymers; imprint lithography; microwave synthesis; polyfluorene; polymer grafting
类别
资金
- UMass Center for Hierarchical Manufacturing (CHM)
- NSF Nanoscale Science and Engineering Center [DMI-0531171]
- NSF DMR Polymers [DMR 0606391]
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 mu m to 100 nm in width and 60 nm in height. Micro wave-assisted grafting from these patterned surfaces produces fluorescent features as imaged by optical microscopy and a corresponding increase in feature height (is measured by atomic force microscopy.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据