Journal article
Responsive Shape Change of Sub-5 nm Thin, Janus Polymer Nanoplates
ACS macro letters, v 5(6), pp 651-655
01 Jun 2016
PMID: 35614666
Abstract
Responsive shape changes in soft materials have attracted significant attention in recent years. Despite extensive studies, it is still challenging to prepare nanoscale assemblies with responsive behaviors. Herein we report on the fabrication and pH-responsive properties of sub-S nm thin, Janus polymer nanoplates prepared via crystallization-driven self-assembly of poly(e-caprolactone)-b-poly(acrylic acid) (PCL-b-PAA) followed by cross-linking and disassembly. The resultant Janus nanoplate is comprised of partially cross-linked PAA and tethered PCL brush layers with an overall thickness of similar to 4 nm. We show that pronounced and reversible shape changes from nanoplates to nanobowls can be realized in such a thin free-standing film. This shape change is achieved by exceptionally small stress a few orders of magnitude smaller than conventional hydrogel bilayers. These three-dimensional ultrathin nanobowls are also mechanically stable, which is attributed to the tortoise-shell-like crystalline domains formed in the nanoconfined curved space. Our results pave a way to a new class of free-standing, ultrathin polymer Janus nanoplates that may find applications in nanomotors and nanoactuators.
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Details
- Title
- Responsive Shape Change of Sub-5 nm Thin, Janus Polymer Nanoplates
- Creators
- Hao Qi - Drexel UniversityTian Zhou - Drexel UniversityShan Mei - Drexel UniversityXi Chen - Drexel UniversityChristopher Y. Li - Drexel University
- Publication Details
- ACS macro letters, v 5(6), pp 651-655
- Publisher
- American Chemical Society; Washington, DC
- Number of pages
- 5
- Grant note
- DMR-1308958; CBET 1438240 / National Science Foundation; National Science Foundation (NSF) 1438240 / Directorate For Engineering; National Science Foundation (NSF); NSF - Directorate for Engineering (ENG) 1308958 / Division Of Materials Research; National Science Foundation (NSF); NSF - Directorate for Mathematical & Physical Sciences (MPS)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Web of Science ID
- WOS:000378578600003
- Scopus ID
- 2-s2.0-84975454572
- Other Identifier
- 991019167636704721
InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Web of Science research areas
- Polymer Science