title: From porous gold nanocups to porous nanospheres and solid particles--a new synthetic approach.
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⋅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.
authors: National Institute for Biotechnology and Genetic Engineering (NIBGE), Jhang Road, Faisalabad, Pakistan.
authors: Ayesha
authors: A
authors: Ihsan
authors: Department of Materials Science & Engineering, Physical Sciences and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia.
authors: Habib
authors: H
authors: Katsiev
authors: Department of Materials Science & Engineering, Physical Sciences and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia.
authors: Noktan
authors: N
authors: Alyami
authors: Imaging and Characterization Lab King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia.
authors: Dalaver H
authors: DH
authors: Anjum
authors: National Institute for Biotechnology and Genetic Engineering (NIBGE), Jhang Road, Faisalabad, Pakistan.
authors: Waheed S
authors: WS
authors: Khan
authors: Department of Chemistry, SBA School of Science and Engineering (SSE), Lahore University of Management Sciences (LUMS), DHA, Lahore Cantt 54792, Pakistan. Electronic address: ihussain@lums.edu.pk.
authors: Irshad
authors: I
authors: Hussain
mesh_terms: D000675:Ampyrone / Q000737:chemistry*; D002384:Catalysis; D006046:Gold / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning; D046529:Microscopy, Electron, Transmission; D008872:Microwaves; D054118:Nanospheres / Q000737:chemistry*; D049329:Nanostructures / Q000737:chemistry*; D016062:Porosity; D011205:Povidone / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared
chemical_list: D000675:Ampyrone; D006046:Gold; D011205:Povidone
keywords: Gold nanocups; Porous gold nanospheres; Porous nanoparticles and tomography