From porous gold nanocups to porous nanospheres and solid particles - A new synthetic approach

Ayesha Ihsan, Habib Katsiev, Noktan Mohammed AlYami, Dalaver H. Anjum, Waheed S. Khan, Irshad Hussain

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

We report a versatile approach for the synthesis of porous gold nanocups, porous gold nanospheres and solid gold nanoparticles. Gold nanocups are formed by the slow reduction of gold salt (HAuCl4{dot operator}3H2O) using aminoantipyrene (AAP) as a reducing agent. Adding polyvinylpyrrolidone (PVP) to the gold salt followed by reduction with AAP resulted in the formation of porous gold nanospheres. Microwave irradiation of both of these porous gold particles resulted in the formation of slightly smaller but solid gold particles. All these nanoparticles are thoroughly characterized by UV-visible spectroscopy, scanning electron microscopy (SEM), high resolution transmission electron microscopy (HR-TEM) and bright-field tomography. Due to the larger size, porous nature, low density and higher surface area, these nanomaterials may have interesting applications in catalysis, drug delivery, phototherapy and sensing.
Original languageEnglish (US)
Pages (from-to)59-66
Number of pages8
JournalJournal of Colloid and Interface Science
Volume446
DOIs
StatePublished - May 2015

ASJC Scopus subject areas

  • Biomaterials
  • Surfaces, Coatings and Films
  • Colloid and Surface Chemistry
  • Electronic, Optical and Magnetic Materials

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