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Fabrication of Ultrafine, Highly Ordered Nanostructures Using Carbohydrate-Inorganic Hybrid Block Copolymers
| Content Provider | MDPI |
|---|---|
| Author | Nishimura, Taiki Katsuhara, Satoshi Lee, Chaehun Ree, Brian J. Borsali, Redouane Yamamoto, Takuya Tajima, Kenji Satoh, Toshifumi Isono, Takuya |
| Copyright Year | 2022 |
| Description | Block copolymers (BCPs) have garnered considerable interest due to their ability to form microphase-separated structures suitable for nanofabrication. For these applications, it is critical to achieve both sufficient etch selectivity and a small domain size. To meet both requirements concurrently, we propose the use of oligosaccharide and oligodimethylsiloxane as hydrophilic and etch-resistant hydrophobic inorganic blocks, respectively, to build up a novel BCP system, i.e., carbohydrate-inorganic hybrid BCP. The carbohydrate-inorganic hybrid BCPs were synthesized via a click reaction between oligodimethylsiloxane with an azido group at each chain end and propargyl-functionalized maltooligosaccharide (consisting of one, two, and three glucose units). In the bulk state, small-angle X-ray scattering revealed that these BCPs microphase separated into gyroid, asymmetric lamellar, and symmetric lamellar structures with domain-spacing ranging from 5.0 to 5.9 nm depending on the volume fraction. Additionally, we investigated microphase-separated structures in the thin film state and discovered that the BCP with the most asymmetric composition formed an ultrafine and highly oriented gyroid structure as well as in the bulk state. After reactive ion etching, the gyroid thin film was transformed into a nanoporous-structured gyroid $SiO_{2}$ material, demonstrating the material’s promising potential as nanotemplates. |
| Starting Page | 1653 |
| e-ISSN | 20794991 |
| DOI | 10.3390/nano12101653 |
| Journal | Nanomaterials |
| Issue Number | 10 |
| Volume Number | 12 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2022-05-12 |
| Access Restriction | Open |
| Subject Keyword | Nanomaterials Biophysics Organic–inorganic Hybrid Block Copolymer Self-assembly Microphase-separated Structure Gyroid Structure |
| Content Type | Text |
| Resource Type | Article |
