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EnglishThis contribution concerns a structural investigation of dilauroylphosphonucleoside aggregates in aqueous solutions as a function of ionic strength and surfactant concentration. A micellar growth in the axial direction to form worm-like aggregates is observed as the surfactant concentration is increased, until the system shows a distinct viscoelastic behavior, which suggests the presence of a polymer-like network. Small angle neutron scattering (SANS) allows the structural properties of such micellar networks to be inferred below and above the threshold concentration of entanglement. A merging of SANS and SLS data in fact provides a spectral window corresponding to all the relevant length scales of the system in the direct space. These worm-like aggregates are characterized in terms of cross-sectional radius, persistence length and overall molar mass, while the micellar network can be described by its mesh size.
Living polynucleotides formed by the spontaneous aggregation of dilauroylphosphonucleosides / F.B. Bombelli; D. Berti; U. Keiderling; P. Baglioni. - In: APPLIED PHYSICS. A, MATERIALS SCIENCE & PROCESSING. - ISSN 0947-8396. - STAMPA. - 74(2002), pp. S1270-S1273. [10.1007/s003390101217]
| Titolo: | Living polynucleotides formed by the spontaneous aggregation of dilauroylphosphonucleosides | |
| Autori di Ateneo: | ||
| Autori: | F. B. Bombelli; BERTI, DEBORA; U. Keiderling; BAGLIONI, PIERO | |
| Data di pubblicazione: | 2002 | |
| Rivista: | ||
| Volume: | 74 | |
| Pagina iniziale: | S1270 | |
| Pagina finale: | S1273 | |
| Abstract: | This contribution concerns a structural investigation of dilauroylphosphonucleoside aggregates in aqueous solutions as a function of ionic strength and surfactant concentration. A micellar growth in the axial direction to form worm-like aggregates is observed as the surfactant concentration is increased, until the system shows a distinct viscoelastic behavior, which suggests the presence of a polymer-like network. Small angle neutron scattering (SANS) allows the structural properties of such micellar networks to be inferred below and above the threshold concentration of entanglement. A merging of SANS and SLS data in fact provides a spectral window corresponding to all the relevant length scales of the system in the direct space. These worm-like aggregates are characterized in terms of cross-sectional radius, persistence length and overall molar mass, while the micellar network can be described by its mesh size. | |
| Handle: | http://hdl.handle.net/2158/392255 | |
| Appare nelle tipologie: | 1a - Articolo su rivista |
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