Plasmonic Enhancement of Local Fields in Ultrafine Metal Nanoparticles

2021 ◽  
Author(s):  
Lasse K. Sørensen ◽  
Anton D. Utyushev ◽  
Vadim I. Zakomirnyi ◽  
Valeriy S. Gerasimov ◽  
Alexander E. Ershov ◽  
...  
Keyword(s):  
Metal Nanoparticles ◽  
Local Fields ◽  
Plasmonic Enhancement ◽  
Ultrafine Metal

scholarly journals Controlled growth of ultrafine metal nanoparticles mediated by solid supports

2021 ◽  
Vol 3 (7) ◽  
pp. 1865-1886
Author(s):  
Hongyin Hu ◽  
Shuanglong Lu ◽  
Ting Li ◽  
Yue Zhang ◽  
Chenxi Guo ◽  
...  
Keyword(s):  
Metal Nanoparticles ◽  
Catalytic Properties ◽  
Structural Features ◽  
Controlled Growth ◽  
Solid Supports ◽  
Ultrafine Metal ◽  
Different Types

This article reviews the controlled growth of UMNPs mediated by different types of solid supports and their catalytic properties. The importance of certain structural features of the supports is also discussed.

scholarly journals Collective excitation of plasmon-coupled Au-nanochain boosts photocatalytic hydrogen evolution of semiconductor

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Guiyang Yu ◽  
Jun Qian ◽  
Peng Zhang ◽  
Bo Zhang ◽  
Wenxiang Zhang ◽  
...  
Keyword(s):  
Electromagnetic Field ◽  
Metal Nanoparticles ◽  
Hydrogen Evolution ◽  
Rational Design ◽  
Collective Excitation ◽  
Formation Rate ◽  
Building Blocks ◽  
Localized Surface Plasmon ◽  
Plasmonic Enhancement ◽  
Photocatalytic Hydrogen Evolution

Abstract Localized surface plasmon resonance (LSPR) offers a valuable opportunity to improve the efficiency of photocatalysts. However, plasmonic enhancement of photoconversion is still limited, as most of metal-semiconductor building blocks depend on LSPR contribution of isolated metal nanoparticles. In this contribution, the concept of collective excitation of embedded metal nanoparticles is demonstrated as an effective strategy to enhance the utilization of plasmonic energy. The contribution of Au-nanochain to the enhancement of photoconversion is 3.5 times increase in comparison with that of conventional isolated Au nanoparticles. Experimental characterization and theoretical simulation show that strongly coupled plasmonic nanostructure of Au-nanochain give rise to highly intensive electromagnetic field. The enhanced strength of electromagnetic field essentially boosts the formation rate of electron-hole pair in semiconductor, and ultimately improves photocatalytic hydrogen evolution activity of semiconductor photocatalysts. The concept of embedded coupled-metal nanostructure represents a promising strategy for the rational design of high-performance photocatalysts.

Sputter deposition onto ionic liquids: Simple and clean synthesis of highly dispersed ultrafine metal nanoparticles

2006 ◽  
Vol 89 (24) ◽  
pp. 243117 ◽  
Author(s):  
Tsukasa Torimoto ◽  
Ken-ichi Okazaki ◽  
Tomonori Kiyama ◽  
Kaori Hirahara ◽  
Nobuo Tanaka ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Metal Nanoparticles ◽  
Sputter Deposition ◽  
Ultrafine Metal ◽  
Clean Synthesis ◽  
Highly Dispersed

Graphene-Supported Ultrafine Metal Nanoparticles Encapsulated by Mesoporous Silica: Robust Catalysts for Oxidation and Reduction Reactions

2013 ◽  
Vol 126 (1) ◽  
pp. 254-258 ◽  
Author(s):  
Lu Shang ◽  
Tong Bian ◽  
Baihui Zhang ◽  
Donghui Zhang ◽  
Li-Zhu Wu ◽  
...  
Keyword(s):  
Mesoporous Silica ◽  
Metal Nanoparticles ◽  
Reduction Reactions ◽  
Ultrafine Metal

scholarly journals Optical Trapping, Sizing, and Probing Acoustic Modes of a Small Virus

2020 ◽  
Vol 10 (1) ◽  
pp. 394 ◽  
Author(s):  
Jeffrey Burkhartsmeyer ◽  
Yanhong Wang ◽  
Kam Sing Wong ◽  
Reuven Gordon
Keyword(s):  
Optical Trapping ◽  
Local Fields ◽  
Plasmonic Enhancement ◽  
Virus Particles ◽  
Acoustic Modes ◽  
Analysis Technique ◽  
Viral Particles ◽  
Large Ensembles ◽  
Small Virus ◽  
Good Agreement

Prior opto-mechanical techniques to measure vibrational frequencies of viruses work on large ensembles of particles, whereas, in this work, individually trapped viral particles were studied. Double nanohole (DNH) apertures in a gold film were used to achieve optical trapping of one of the smallest virus particles yet reported, PhiX174, which has a diameter of 25 nm. When a laser was focused onto these DNH apertures, it created high local fields due to plasmonic enhancement, which allowed stable trapping of small particles for prolonged periods at low powers. Two techniques were performed to characterize the virus particles. The particles were sized via an established autocorrelation analysis technique, and the acoustic modes were probed using the extraordinary acoustic Raman (EAR) method. The size of the trapped particle was determined to be 25 ± 3.8 nm, which is in good agreement with the established diameter of PhiX174. A peak in the EAR signal was observed at 32 GHz, which fits well with the predicted value from elastic theory.

scholarly journals In Situ Synthesis of Highly Dispersed and Ultrafine Metal Nanoparticles from Chalcogels

2017 ◽  
Vol 139 (8) ◽  
pp. 2900-2903 ◽  
Author(s):  
Jian Liu ◽  
Kai He ◽  
Weiqiang Wu ◽  
Tze-Bin Song ◽  
Mercouri G. Kanatzidis
Keyword(s):  
Metal Nanoparticles ◽  
In Situ Synthesis ◽  
Ultrafine Metal ◽  
Highly Dispersed
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