title: High-Yield Seeded Growth of Monodisperse Pentatwinned Gold Nanoparticles through Thermally Induced Seed Twinning.
abstract: We show that thermal treatment of small Au seeds results in extensive twinning and a subsequent drastic improvement in the yield (>85%) of formation of pentatwinned nanoparticles (NPs), with preselected morphology (nanorods, bipyramids, and decahedra) and aspect ratio. The "quality" of the seeds thus defines the yield of the obtained NPs, which in the case of nanorods avoids the need for additives such as Ag+ions. This modified seeded growth method also improves reproducibility, as the seeds can be stored for extended periods of time without compromising the quality of the final NPs. Additionally, minor modification of the seeds with Pd allows their localization within the final particles, which opens new avenues toward mechanistic studies. Together, these results represent a paradigm shift in anisotropic gold NP synthesis.
authors.affiliation: Bionanoplasmonics Laboratory, CICbiomaGUNE , Paseo de Miramón 182, 20014 Donostia - San Sebastián, Spain.
authors.forename: Ana
authors.initials: A
authors.lastname: Sánchez-Iglesias
authors.affiliation: EMAT- University of Antwerp , Groenenborgerlaan 171, B-2020 Antwerp, Belgium.
authors.forename: Naomi
authors.initials: N
authors.lastname: Winckelmans
authors.affiliation: EMAT- University of Antwerp , Groenenborgerlaan 171, B-2020 Antwerp, Belgium.
authors.forename: Thomas
authors.initials: T
authors.lastname: Altantzis
authors.affiliation: EMAT- University of Antwerp , Groenenborgerlaan 171, B-2020 Antwerp, Belgium.
authors.forename: Sara
authors.identifier: 0000-0002-4249-8017
authors.initials: S
authors.lastname: Bals
authors.affiliation: Bionanoplasmonics Laboratory, CICbiomaGUNE , Paseo de Miramón 182, 20014 Donostia - San Sebastián, Spain.|Ikerbasque, Basque Foundation for Science , 48013 Bilbao, Spain.
authors.forename: Marek
authors.initials: M
authors.lastname: Grzelczak
authors.affiliation: Bionanoplasmonics Laboratory, CICbiomaGUNE , Paseo de Miramón 182, 20014 Donostia - San Sebastián, Spain.|Ikerbasque, Basque Foundation for Science , 48013 Bilbao, Spain.|Ciber de Bioingeniería, Biomateriales y Nanomedicina , 20014 Donostia - San Sebastián, Spain.
authors.forename: Luis M
authors.identifier: 0000-0002-6647-1353
authors.initials: LM
authors.lastname: Liz-Marzán