Photolithographic structuring of surface-attached polymer monolayers

Fabrication of Chemically Tethered Binary Polymer‐Brush Pattern through Two‐Step Surface‐Initiated Atomic‐Transfer Radical Polymerization

“…This was realized by transforming the Br end group to an azide end group, making use of the reaction with sodium azide in DMF. [11] This end group transformation was verified by the corresponding XPS spectra ( Figure 1A) and ATR-FTIR spectra ( Figure 1B). Namely, the complete disappearance of the Br signals in the XPS spectra and the appearance of the azide peak at 2 124 cm À1 in the ATR-FTIR spectra after derivatization demonstrated the complete transformation of the bromo group into the azide group.…”

“…[10] Unfortunately, the post photolithographic technique is only applicable to some light-sensitive polymers. In addition, although Rühe and co-workers [11] Summary: The communication provides a novel and alternative route to generate chemically tethered binary polymerbrush pattern through two-step surface-initiated atomictransfer radical polymerization (SI-ATRP). Polymer brush-1 was prepared by SI-ATRP, passivated by a reaction with NaN 3 , and etched with UV irradiation through a transmission electron microscopy grid to create exposed sites for the subsequently attached initiator on which polymer brush-2 was grown.…”

Patterning of Gold Substrates by Surface‐Initiated Polymerization

“…In particular, Rühe has used photoinitiation to pattern both silicon and gold substrates. [66,67] Furthermore, our group is developing new photoinitiators for improved control over pattern resolution and processing with a variety of monomers. [68±70] The most successful photo-SIPs have been based on AIBN.…”

Polymer pattern formation on SiO2 surfaces using surface monolayer initiated polymerization

“…This approach can be used for photopatterning. 29 Two different methods of patterning the polymer film were used in our study, resulting in either negative or positive resist images. When a TEM grid ͑mask͒ was placed over an immobilized initiator film that was immersed in a monomer solution and irradiated using UV light, highly reactive radicals were formed only in the exposed areas; these radicals initiated polymer growth.…”