Structural characterization of Au nano bipyramids: reshaping under thermal annealing, the capping agent effect and surface decoration with Pt

TORRESAN, MARÍA FERNANDA; ANGELOMÉ, PAULA C; BAZÁN-DÍAZ, LOURDES; VELÁZQUEZ-SALAZAR, J JESÚS; MENDOZA-CRUZ, RUBÉN; IGLESIAS, RODRIGO A; JOSÉ-YACAMÁN, MIGUEL

NANOTECHNOLOGY

IOP PUBLISHING LTD

Lugar: Londres; Año: 2019 vol. 30 p. 205701 - 205701

0957-4484

Anisotropic gold nanoparticles offer potential applications due to the functionalities and the shape dependent properties. Reshaping noble metal nanoparticles is an interesting field with optical, Surface Enhanced Raman Spectroscopy (SERS), catalytic applications and potential application as a photothermic therapy. This work comprises the structural study on gold nanobipyramids (Au NBPs) and nanodumbbells (Au NDs) and the evolution of Au NBPs capped with Cetyl trimethylammonium bromide (CTAB) and dodecanethiol through an in-situ and ex-situ heating process in high vacuum. Also, we study to reshape Au NBPs by the addition of Pt to study the surface modification and the strain generated on a single particle by geometric phase analysis (GPA).