How does a gold nanorod melt?

Article Abstract:

Structural transformation of gold nanorod is investigated by high-resolution transmission electron microscopy after they are exposed to low-energy fremosecond and nanosecond laser pulses in colloidal solution. It is concluded that high-resolution TEM revealed that point planar defects are present in gold nanorods after laser irradiation although the as-prepared nanorods are detect-free.

Transmission electron microscopes, Radiation chemistry

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Ultrafast electron relaxation dynamics in coupled metal nanoparticles in aggregates

Article Abstract:

The effect of aggregation in gold nanoparticles on their ultrafast electron-phonon relaxation dynamics measured by femtosecond transient absorption pump-probe spectroscopy is reported. Results strongly suggest the presence of intercolloid electronic coupling within the nanoparticle aggregates, besides the well-known dipolar plasmon coupling.

Spectra, Nanoparticles

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Picosecond self-induced thermal lensing from colloidal silver nanodisks

Article Abstract:

The static and ultrafasttime-resolved pump-probe spectroscopy is used to study the thermal relaxation dynamics of silver nanodisks. A large increase in the bleach intensity at long delay times (greater than 20 ps) after femtosecond laser excitation has been observed due to the thermal lensing phenomenon.

Nanotechnology, Chemistry, Physical and theoretical, Physical chemistry, Dynamics, Dynamics (Mechanics), Laser spectroscopy

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