GaAs–Polymer Hybrids Formed by Surface-Initiated Atom-Transfer Radical Polymerization of Methyl Methacrylate

✍ Scribed by Qin Jia Cai; Guo Dong Fu; Fu Rong Zhu; En-Tang Kang; Koon-Gee Neoh

• Publisher: John Wiley and Sons
• Year: 2005
• Tongue: English
• Weight: 148 KB
• Volume: 117
• Category: Article
• ISSN: 0044-8249
• DOI: 10.1002/ange.200461570

✦ Synopsis

Semiconductor-polymer hybrids prepared by incorporating polymer brushes on semiconductor substrates have attracted considerable attention in recent years. The hybrids have unique surface and interface properties, [1][2][3][4][5][6][7][8][9][10] and allow the fabrication of nanopatterns. [11][12][13][14][15][16] Popular strategies for incorporating polymer brushes on substrates include the "topdown" or "grafting-to" approach, in which macromolecules are tethered directly onto the surface of a substrate, and the "bottom-up" or "grafting-from" approach, which attempts to grow polymer brushes from initiators anchored on a substrate surface. The latter approach can result in more densely packed polymer brushes. [17] Ionic (anionic [18][19][20] and cationic [6,21] ), ring-opening, [11,[22][23][24][25][26] radical, [17,27,28] nitroxide-mediated radical, [1] and atom-transfer radical [3-6, 29, 30] polymerizations have been used for surface graft polymerizations. Among these techniques, atom-transfer radical polymerization (ATRP) allows the preparation of well-defined poly-