Directed Growth of Virus Nanofilaments on a Superhydrophobic Surface

Giovanni Marinaro, Manfred Burghammer, Luca Costa, Thomas Dane, Francesco De Angelis, Enzo M. Di Fabrizio, Christian Riekel

Research output: Contribution to journalArticlepeer-review

13 Scopus citations


The evaporation of single droplets of colloidal tobacco mosaic virus (TMV) nanoparticles on a superhydrophobic surface with a hexagonal pillar-pattern results in the formation of coffee-ring type residues. We imaged surface features by optical, scanning electron, and atomic force microscopies. Bulk features were probed by raster-scan X-ray nanodiffraction. At ∼100 pg/μL nanoparticle concentration, the rim of the residue connects to neighboring pillars via fibrous extensions containing flow-aligned crystalline domains. At ∼1 pg/μL nanoparticle concentration, nanofilaments of ¥80 nm diameter and ∼20 μm length are formed, extending normal to the residue-rim across a range of pillars. X-ray scattering is dominated by the nanofilament form-factor but some evidence for crystallinity has been obtained. The observation of sheets composed of stacks of self-assembled nanoparticles deposited on pillars suggests that the nanofilaments are drawn from a structured droplet interface. © 2015 American Chemical Society.
Original languageEnglish (US)
Pages (from-to)12373-12379
Number of pages7
JournalACS Applied Materials & Interfaces
Issue number23
StatePublished - Jan 20 2015


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