Metal and size effects on structures and photophysical properties of porphyrin-modified metal nanoclusters

2003 ◽  
Vol 13 (12) ◽  
pp. 2890 ◽  
Author(s):  
Hiroshi Imahori ◽  
Yukiyasu Kashiwagi ◽  
Takeshi Hanada ◽  
Yoshiyuki Endo ◽  
Yoshinobu Nishimura ◽  
...  
Keyword(s):  
Size Effects ◽  
Photophysical Properties ◽  
Metal Nanoclusters

Energy and size effects in sputtering of surface metal nanoclusters under low energy ion bombardment

2007 ◽  
Vol 601 (1) ◽  
pp. 209-217 ◽  
Author(s):  
G.V. Kornich ◽  
G. Betz ◽  
V. Zaporojtchenko ◽  
K.V. Pugina
Keyword(s):  
Size Effects ◽  
Ion Bombardment ◽  
Low Energy ◽  
Metal Nanoclusters ◽  
Surface Metal

Structure and Photophysical Properties of Porphyrin-Modified Metal Nanoclusters with Different Chain Lengths

Langmuir ◽  
2004 ◽  
Vol 20 (1) ◽  
pp. 73-81 ◽  
Author(s):  
Hiroshi Imahori ◽  
Yukiyasu Kashiwagi ◽  
Yoshiyuki Endo ◽  
Takeshi Hanada ◽  
Yoshinobu Nishimura ◽  
...  
Keyword(s):  
Photophysical Properties ◽  
Metal Nanoclusters ◽  
Chain Lengths

scholarly journals Zeolites as Scaffolds for Metal Nanoclusters

2021 ◽  
Author(s):  
Eduard Fron
Keyword(s):  
Reaction Mechanisms ◽  
Metal Clusters ◽  
Photophysical Properties ◽  
Research Articles ◽  
Photostimulated Luminescence ◽  
Metal Nanoclusters ◽  
Computational Approaches ◽  
Excellent Research ◽  
Emitting Species ◽  
Insight Into

This chapter critically reviews the studies related to structural and photophysical properties of metal clusters within zeolites matrices and summarizes the progress made in understanding the host-guest interactions. The goal is to provide useful insight into the nature of such interactions and experiments used in identifying the excited state dynamics and the reaction mechanisms leading to the emitting species. Especially interesting are the combined experimental and computational approaches used to elucidate the structures and electronic transition of clusters inside the cavity. Although a number of excellent research articles have been published in the last years they only cover rather specific areas like organic photochemistry, confinement, charge transfer, theoretical modeling or photostimulated luminescence.

scholarly journals Gold Nanoclusters: Bridging Gold Complexes and Plasmonic Nanoparticles in Photophysical Properties

Nanomaterials ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 933 ◽  
Author(s):  
Meng Zhou ◽  
Chenjie Zeng ◽  
Qi Li ◽  
Tatsuya Higaki ◽  
Rongchao Jin
Keyword(s):  
Excited State ◽  
Photophysical Properties ◽  
Gold Nanoclusters ◽  
Detailed Comparison ◽  
Organometallic Complexes ◽  
Plasmonic Nanoparticles ◽  
Metal Nanoclusters ◽  
Metal Core ◽  
Gold Complexes ◽  
Metal Metal

Recent advances in the determination of crystal structures and studies of optical properties of gold nanoclusters in the size range from tens to hundreds of gold atoms have started to reveal the grand evolution from gold complexes to nanoclusters and further to plasmonic nanoparticles. However, a detailed comparison of their photophysical properties is still lacking. Here, we compared the excited state behaviors of gold complexes, nanolcusters, and plasmonic nanoparticles, as well as small organic molecules by choosing four typical examples including the Au10 complex, Au25 nanocluster (1 nm metal core), 13 diameter Au nanoparticles, and Rhodamine B. To compare their photophysical behaviors, we performed steady-state absorption, photoluminescence, and femtosecond transient absorption spectroscopic measurements. It was found that gold nanoclusters behave somewhat like small molecules, showing both rapid internal conversion (<1 ps) and long-lived excited state lifetime (about 100 ns). Unlike the nanocluster form in which metal–metal transitions dominate, gold complexes showed significant charge transfer between metal atoms and surface ligands. Plasmonic gold nanoparticles, on the other hand, had electrons being heated and cooled (~100 ps time scale) after photo-excitation, and the relaxation was dominated by electron–electron scattering, electron–phonon coupling, and energy dissipation. In both nanoclusters and plasmonic nanoparticles, one can observe coherent oscillations of the metal core, but with different fundamental origins. Overall, this work provides some benchmarking features for organic dye molecules, organometallic complexes, metal nanoclusters, and plasmonic nanoparticles.

An overview on the current understanding of the photophysical properties of metal nanoclusters and their potential applications

Nanoscale ◽  
2019 ◽  
Vol 11 (47) ◽  
pp. 22685-22723 ◽  
Author(s):  
Subarna Maity ◽  
Dipankar Bain ◽  
Amitava Patra
Keyword(s):  
Photophysical Properties ◽  
Current Understanding ◽  
Metal Nanoclusters ◽  
Potential Applications ◽  
Bio Imaging

Photophysics of atomically precise metal nanoclusters (MNCs) is an emerging area of research due to their potential applications in optoelectronics, photovoltaics, sensing, bio-imaging and catalysis.

Search for quantum size effects in ultrathin epitaxial metallic films

1991 ◽  
Vol 16 (6) ◽  
pp. 623-638 ◽  
Author(s):  
P.A. Badoz ◽  
F. Arnaud d'Avitaya ◽  
E. Rosencher
Keyword(s):  
Size Effects ◽  
Quantum Size Effects ◽  
Metallic Films ◽  
Quantum Size

Cluster size effects revisited

1995 ◽  
Vol 92 ◽  
pp. 205-225 ◽  
Author(s):  
J Jortner
Keyword(s):  
Size Effects ◽  
Cluster Size
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