Formation of Hollow Gold Nanocrystals by Nanosecond Laser Irradiation
2020
The
irradiation of spherical gold nanoparticles (AuNPs) with nanosecond
laser pulses induces shape transformations yielding nanocrystals with
an inner cavity. The concentration of the stabilizing surfactant,
the use of moderate pulse fluences, and the size of the irradiated
AuNPs determine the efficiency of the process and the nature of the
void. Hollow nanocrystals are obtained when molecules from the surrounding
medium (e.g., water and organic matter derived from the surfactant)
are trapped during laser pulse irradiation. These experimental observations
suggest the existence of a subtle balance between the heating and
cooling processes experienced by the nanocrystals, which induce their
expansion and subsequent recrystallization keeping exogenous matter
inside. The described approach provides valuable insight into the
mechanism of interaction of a pulsed nanosecond laser with AuNPs,
along with interesting prospects for the development of hollow plasmonic
nanoparticles with potential applications related to gas and liquid
storage at the nanoscale.
Keywords:
- Correction
- Source
- Cite
- Save
- Machine Reading By IdeaReader
55
References
8
Citations
NaN
KQI