Hollow Mesoporous Plasmonic Nanoshells for Enhanced Solar Vapor Generation

Marcin S. Zielinski, Jae Woo Choi, Thomas La Grange, Miguel Modestino, Seyyed Mohammad Hosseini Hashemi, Ye Pu, Susanne Birkhold, Jeffrey A. Hubbell, Demetri Psaltis

Research output: Contribution to journalArticlepeer-review


In the past decade, nanomaterials have made their way into a variety of technologies in solar energy, enhancing the performance by taking advantage of the phenomena inherent to the nanoscale. Recent examples exploit plasmonic core/shell nanoparticles to achieve efficient direct steam generation, showing great promise of such nanoparticles as a useful material for solar applications. In this paper, we demonstrate a novel technique for fabricating bimetallic hollow mesoporous plasmonic nanoshells that yield a higher solar vapor generation rate compared with their solid-core counterparts. On the basis of a combination of nanomasking and incomplete galvanic replacement, the hollow plasmonic nanoshells can be fabricated with tunable absorption and minimized scattering. When exposed to sun light, each hollow nanoshell generates vapor bubbles simultaneously from the interior and exterior. The vapor nucleating from the interior expands and diffuses through the pores and combines with the bubbles formed on the outer wall. The lack of a solid core significantly accelerates the initial vapor nucleation and the overall steam generation dynamics. More importantly, because the density of the hollow porous nanoshells is essentially equal to the surrounding host medium these particles are much less prone to sedimentation, a problem that greatly limits the performance and implementation of standard nanoparticle dispersions.

Original languageEnglish (US)
Pages (from-to)2159-2167
Number of pages9
JournalNano Letters
Issue number4
StatePublished - Apr 13 2016


  • Composite nanoshell
  • mesoporosity
  • plasmonics
  • solar-vapor
  • steam nanobubble
  • thermal cavity

ASJC Scopus subject areas

  • Bioengineering
  • General Chemistry
  • General Materials Science
  • Condensed Matter Physics
  • Mechanical Engineering


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