Interaction of gold nanoparticles with nanosecond laser pulses: Nanoparticle heating

2011 ◽  
Vol 257 (12) ◽  
pp. 5456-5459 ◽  
Author(s):  
N.N. Nedyalkov ◽  
S.E. Imamova ◽  
P.A. Atanasov ◽  
R.A. Toshkova ◽  
E.G. Gardeva ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Laser Pulses ◽  
Nanosecond Laser ◽  
Nanosecond Laser Pulses

PREPARATION OF GOLD NANOPARTICLES WITH NARROW SIZE DISTRIBUTIONS AND WELL DEFINED SHAPES

2005 ◽  
Vol 19 (15n17) ◽  
pp. 2604-2609 ◽  
Author(s):  
FRANK HUBENTHAL ◽  
CHRISTIAN HENDRICH ◽  
HASSAN OUACHA ◽  
DAVID BLÁZQUEZ SÁNCHEZ ◽  
FRANK TRÄGER
Keyword(s):  
Gold Nanoparticles ◽  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Axial Ratio ◽  
Laser Pulses ◽  
Nanosecond Laser ◽  
Shape Distribution ◽  
Size And Shape ◽  
Nanosecond Laser Pulses

In this contribution, we present the results of recent experiments with the objective of tailoring the size and shape of gold nanoparticles with nanosecond laser pulses. The technique is based on the size and shape dependent surface plasmon resonance frequencies of metal nanoparticles. In our recent experiments gold nanoparticles were prepared by deposition of atoms on dielectric substrates followed by diffusion and nucleation. This usually results in ensembles of oblate nanoparticles with a broad size and shape distribution. Irradiating the gold particles during growth with nanosecond laser pulses makes it possible to produce nanoparticles with a predetermined axial ratio independent of size. For example, irradiating gold nanoparticles with a photon energy of 1.65 eV during growth stabilizes an axial ratio of a/b = 0.14, a being the short axis and b the long axis of the ellipsoidal nanoparticles. Furthermore, post-growth irradiation permits tailoring the average size of the nanoparticles by laser induced surface diffusion and evaporation of atoms. In principle, it is possible to eliminate all particles of undesired sizes by choosing the appropriate photon energies. We demonstrate that narrowing of the width of the surface plasmon resonance from initially 0.52 eV (half width at half maximum) to 0.2 eV is possible by using a single laser frequency. Combining both methods, i.e. laser irradiation during and after growth, finally results in a narrow size and shape distribution of the particles.

scholarly journals Kinetics of molecular decomposition under irradiation of gold nanoparticles with nanosecond laser pulses—A 5-Bromouracil case study

2020 ◽  
Vol 152 (12) ◽  
pp. 124712 ◽  
Author(s):  
Telma S. Marques ◽  
Robin Schürmann ◽  
Kenny Ebel ◽  
Christian Heck ◽  
Małgorzata A. Śmiałek ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Laser Pulses ◽  
Nanosecond Laser ◽  
Molecular Decomposition ◽  
Nanosecond Laser Pulses ◽  
Kinetics Of

Formation of Periodical Sub-Micron Sized Structures on Silicon by Interfered Nanosecond Laser Pulses

2010 ◽  
Vol 97-101 ◽  
pp. 3803-3806
Author(s):  
Yong Xiang Hu ◽  
Heng Zhang ◽  
Zheng Qiang Yao
Keyword(s):  
Cost Effective ◽  
Laser Pulses ◽  
Laser Beams ◽  
Nanosecond Laser ◽  
Effective Technique ◽  
First Order ◽  
Direct Fabrication ◽  
Cost Effective Technique ◽  
Nanosecond Laser Pulses ◽  
Micro Structuring

Laser interference micro-structuring is a relatively efficient and cost-effective technique for fabricating periodical micro-nano-structuring surfaces. The direct fabrication of sub-micron sized dot array on silicon was performed by four interfering nanosecond laser beams with a diffractive beam splitter. The mechanism to form the dot array was analyzed and it was found that the obtained conical dot array had a negative shape of the interference pattern of four laser beams. A second-order peak between two first-order peaks also occurred due to the liquid-solid expansion.

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