Issue 2, 2018

Microstructural metrology of tobacco mosaic virus nanorods during radial compression and heating

Abstract

We determined stress-induced deformations and the thermal stability of nanorod-shaped tobacco mosaic virus (TMV) capsids in coffee-ring structures by X-ray nanodiffraction. The hexagonal capsids lattice transforms under compression in the outer boundary zone of the coffee-ring into a tetragonal lattice. The helical pitch of the nanorods increases by about 2.5% across the outer boundary zone while the lateral distance between nanorods decreases continuously across the whole coffee-ring structure by about 2% due to compressive forces. The diffraction patterns show a mixture of helical scattering and Bragg peaks attributed to a lattice of nanorods interlocked by their helical grooves. Thermo-nanodiffraction reveals water loss up to about 100 °C resulting in a reduction of the helical pitch by about 6% with respect to its maximum value and a reduction of the nanorods separation by about 0.5 nm. Up to about 200 °C the pitch is increasing again by about 2%. Secondary crystallization in the bulk reaches a maximum at 150–160 °C. At higher temperatures the crystallinity is continuously decreasing up to about 220 °C. Above about 200 °C and depending on the heating history, the nanorods start disintegrating into small, randomly oriented aggregates.

Graphical abstract: Microstructural metrology of tobacco mosaic virus nanorods during radial compression and heating

Supplementary files

Article information

Article type
Paper
Submitted
05 Jul 2017
Accepted
07 Nov 2017
First published
07 Nov 2017

Soft Matter, 2018,14, 194-204

Microstructural metrology of tobacco mosaic virus nanorods during radial compression and heating

C. Riekel, M. Burghammer, I. Snigirev and M. Rosenthal, Soft Matter, 2018, 14, 194 DOI: 10.1039/C7SM01332A

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements