Stretching and folding of 2-nanometer hydrocarbon rods
2014 | journal article. A publication of Göttingen
Jump to: Cite & Linked | Documents & Media | Details | Version history
Documents & Media
Advance Article2.11 MBAdobe PDFSupplementary information171.17 kBAdobe PDFAdvance Article2.11 MBUnknownSupplementary information171.17 kBUnknown
Details
- Authors
- Lüttschwager, Nils O. B. ; Suhm, Martin A.
- Abstract
- Linear alkanes CnH2n+2 in vacuum isolation are finite models for an infinite polyethylene chain. Using spontaneous Raman scattering in supersonic jet expansions for n = 13–21 in different spectral ranges, we determine the minimal chain length nh for the cohesion-driven folding of the preferred extended all-trans conformation into a hairpin structure. We treat fully stretched all-trans alkanes as molecular “nanorods” and derive Young's modulus E for the stretching of an isolated single-strand polyethylene fibre by extrapolating the longitudinal acoustic mode to infinite chain length. Two key quality parameters for accurate intra- and intermolecular force fields of hydrocarbons (nh = 18 ± 1, E = 305 ± 5 GPa) are thus derived with high accuracy from experimental spectroscopy.
- Issue Date
- 2014
- Status
- published
- Publisher
- Royal Soc Chemistry
- Journal
- Soft Matter
- Organization
- Institut für Physikalische Chemie
- ISSN
- 1744-6848
- eISSN
- 1744-6848
- Language
- English