Stretching of assembled nanoparticle helical springs

Jonathan T. Pham, Jimmy Lawrence, Gregory M. Grason, Todd Emrick, Alfred J. Crosby

Research output: Contribution to journalArticlepeer-review

13 Scopus citations


Hybrid materials that possess high inorganic fractions of nanoscale particles can be advantageous for a wide range of functions, from optoelectronic or electronic devices to drug delivery. However, many current nanoparticle (NP) based materials lack the necessary combination of simple fabrication and robust mechanical properties that span across length scales greater than tens of microns. We have developed a facile, evaporative assembly method called flow coating to create NP based ribbons that can subsequently form helical structures. Here we analytically examine the stretching properties of these helical ribbons which are nanometers thick, microns wide, and arbitrarily long. We find that the force-extension behavior is well described by the elastic and surface energies, which can be used as a guideline for their design. In addition, we show that the properties may be tuned by changing the ribbon dimensions or material composition to yield a different stiffness. These macroscale mechanical properties, along with properties inherent to the nanometer length scale of the particles can provide tunable multifunctionality for a number of applications. This journal is

Original languageEnglish
Pages (from-to)10261-10266
Number of pages6
JournalPhysical Chemistry Chemical Physics
Issue number22
StatePublished - Jun 14 2014

ASJC Scopus subject areas

  • General Physics and Astronomy
  • Physical and Theoretical Chemistry


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