Abstract
Ultrathin films of aligned cellulose nanocrystals (CNCs) were assembled on mica supports by using electric field-assisted shear. The relationship between polarization gradients and strain mechanics of the obtained films was examined by monitoring their deflection with an atomic force microscope operated in contact mode. The piezoelectric response of the films was ascribed to the collective contribution of the asymmetric crystalline structure of the cellulose crystals. The magnitude of the effective shear piezoelectric constant (d(25)) of highly ordered CNC films was determined to be 2.1 angstrom/V, which is comparable to that of a reference film of a piezoelectric metal oxide.
| Original language | English |
|---|---|
| Pages (from-to) | 867-870 |
| Number of pages | 4 |
| Journal | ACS Macro Letters |
| Volume | 1 |
| Issue number | 7 |
| DOIs | |
| Publication status | Published - Jul 2012 |
| MoE publication type | A1 Journal article-refereed |
Funding
The authors would like to acknowledge funding support from the National Research Initiative of the USDA Cooperative State Research, Education and Extension Service, Grant Nos. 2005-35504-16145 and 2007-35504-18290. FiDiPro's LignoCell project (O.J.R) and TAMOP 4.2.1.B-09/1/KONV-2010-0006 Intellectual, Organizational, and R+D Infrastructural Development of University of West Hungary (L.C.) are also acknowledged.
Keywords
- NATIVE CELLULOSE
- ELECTRIC-FIELD
- VALONIA CELLULOSE
- MAGNETIC-FIELDS
- ORIENTATION
- SUSPENSIONS
- ALIGNMENT
- MICROCRYSTALS
- CRYSTALS
- PHASE
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