Polymeric Nanocylinders by Combining Block Copolymer Self-Assembly and Nanoskiving
详细信息 查看全文
- 作者：Mohammadreza Nasiri ; Arthur Bertrand ; Theresa M. Reineke ; Marc A. Hillmyer
- 刊名：ACS Applied Materials & Interfaces
- 出版年：2014
- 出版时间：September 24, 2014
- 年：2014
- 卷：6
- 期：18
- 页码：16283-16288
- 全文大小：444K
- ISSN：1944-8252
文摘
A new facile fabrication approach to generate polymeric nanostructures is described. Block copolymers containing immiscible segments can self-assemble to generate ordered nanostructures, such as cylinders of one block in a matrix of the other in the bulk, which can then be sectioned on the nanoscale using a microtome (nanoskiving). Dispersing these sections in a selective solvent for the matrix block results in nanocylinders. In one example, we utilized a poly(N,N-dimethylacrylamide)-block-poly(styrene) (PDMA鈥揚S) copolymer containing 36% by volume of PS. This composition was selected as it self-assembles into cylinders of PS in a matrix of PDMA. Following a previously described procedure, the cylinders were aligned using a channel die. The aligned samples were subsequently sectioned using a microtome containing a diamond knife and dispersed in water, a selective solvent for the PDMA matrix, affording PS nanocylinders with a PDMA corona. This technique allows tuning of nanocylinders without the requirement of specialty fabrication equipment.