Atomically Precise Alkynyl-Protected Metal Nanoclusters as a Model Catalyst: Observation of Promoting Effect of Surface Ligands on Catalysis by Metal Nanoparticles

2016 ◽  
Vol 138 (10) ◽  
pp. 3278-3281 ◽  
Author(s):  
Yu Wang ◽  
Xian-Kai Wan ◽  
Liting Ren ◽  
Haifeng Su ◽  
Gang Li ◽  
...  
Keyword(s):  
Metal Nanoparticles ◽  
Model Catalyst ◽  
Metal Nanoclusters ◽  
Promoting Effect ◽  
Surface Ligands ◽  
Effect Of Surface

Effect of surface chemistry on bio-conjugation and bio-recognition abilities of 2D germanene materials

Nanoscale ◽  
2021 ◽  
Vol 13 (3) ◽  
pp. 1893-1903
Author(s):  
Wei Li Ang ◽  
Jiri Sturala ◽  
Nikolas Antonatos ◽  
Zdeněk Sofer ◽  
Alessandra Bonanni
Keyword(s):  
Surface Chemistry ◽  
Strong Influence ◽  
Intrinsic Fluorescence ◽  
Surface Ligands ◽  
Chemically Modified ◽  
Recognition Efficiency ◽  
Effect Of Surface

The surface ligands on chemically modified germanenes have strong influence on the intrinsic fluorescence, on the bio-conjugation ability and the bio-recognition efficiency of the material towards the detection of a specific analyte.

The impacts of nanotechnology on catalysis by precious metal nanoparticles

2012 ◽  
Vol 1 (1) ◽  
pp. 31-56 ◽  
Author(s):  
Rongchao Jin
Keyword(s):  
Metal Nanoparticles ◽  
Precious Metal ◽  
Metallic Nanoparticles ◽  
Active Sites ◽  
Active Surface ◽  
Catalytic Performance ◽  
Solution Phase ◽  
Future Research ◽  
Metal Support ◽  
Effect Of Surface

AbstractThis review article focuses on the impacts of recent advances in solution phase precious metal nanoparticles on heterogeneous catalysis. Conventional nanometal catalysts suffer from size polydispersity. The advent of nanotechnology has significantly advanced the techniques for preparing uniform nanoparticles, especially in solution phase synthesis of precious metal nanoparticles with excellent control over size, shape, composition and morphology, which have opened up new opportunities for catalysis. This review summarizes some recent catalytic research by using well-defined nanoparticles, including shape-controlled nanoparticles, high index-faceted polyhedral nanocrystals, nanostructures of different morphology (e.g., core-shell, hollow, etc.), bi- and multi-metallic nanoparticles, as well as atomically precise nanoclusters. Such well-defined nanocatalysts provide many exciting opportunities, such as identifying the types of active surface atoms (e.g., corner and edge atoms) in catalysis, the effect of surface facets on catalytic performance, and obtaining insight into the effects of size-induced electron energy quantization in ultra-small metal nanoparticles on catalysis. With well-defined metal nanocatalysts, many fundamentally important issues are expected to be understood much deeper in future research, such as the nature of the catalytic active sites, the metal-support interactions, the effect of surface atom arrangement, and the atomic origins of the structure-activity and the structure-selectivity relationships.

scholarly journals Effect of surface ligands on gold nanocatalysts for CO2 reduction

2020 ◽  
Vol 11 (45) ◽  
pp. 12298-12306
Author(s):  
Hongyu Shang ◽  
Spencer K. Wallentine ◽  
Daniel M. Hofmann ◽  
Quansong Zhu ◽  
Catherine J. Murphy ◽  
...  
Keyword(s):  
Metal Ions ◽  
Au Nanoparticles ◽  
Co2 Reduction ◽  
Permeable Membrane ◽  
Surface Ligands ◽  
Minimal Loss ◽  
Effect Of Surface

Dodecanethiol on Au nanoparticles significantly enhances selectivity and stability with minimal loss in activity by acting as a CO2-permeable membrane, which blocks the deposition of metal ions that are otherwise responsible for rapid deactivation.

N-Heterocyclic carbene-ended polymers as surface ligands of plasmonic metal nanoparticles

2020 ◽  
Vol 8 (7) ◽  
pp. 2280-2288 ◽  
Author(s):  
Srinivas Thanneeru ◽  
Kaitlynn M. Ayers ◽  
Murali Anuganti ◽  
Lei Zhang ◽  
Challa V. Kumar ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Metal Nanoparticles ◽  
Surface Ligands

A facile methodology to prepare N-heterocyclic carbene (NHC)-terminated polymers as surface ligands to functionalize gold nanoparticles (AuNPs) is reported.

scholarly journals Morphology control and optical properties of CdSe nanorods by surface ligands-=SUP=-*-=/SUP=-

2019 ◽  
Vol 45 (16) ◽  
pp. 23
Author(s):  
Zhiyuan Lin ◽  
Jinhua Li ◽  
Ke Feng ◽  
Yue Wang ◽  
Xueying Chu ◽  
...  
Keyword(s):  
Aspect Ratio ◽  
Optical Materials ◽  
Crystal Surface ◽  
Crystal Face ◽  
Absorption And Emission ◽  
Surface Ligands ◽  
Optical Stability ◽  
Cdse Nanorod ◽  
Cdse Nanorods ◽  
Effect Of Surface

In this paper, CdSe nanorods were prepared via solvothermal synthesis, the effect of surface ligands on the morphology of nanorods was investigated under the premise by tuning the percentage of surface ligands in the precursors. Experimental results show that the absorption and emission spectrum of CdSe nanorod with different aspect ratio varying from 4:1 to 2:1 have a red-shift, and the aspect ratio gradually decreases as the percentage of tetradecylphosphoric acid (TDPA) in the precursor increases. In addition, the CdSe optical stability improves as the percentage of TDPA increases. It is also shown that the crystal surface, which is not covered by TDPA, has an increased surface energy, which results in rapid growth of the crystal face and the formation of a rod-like structure. As a result, the effects of anisotropic absorption and emission, along the long axis properties can find many applications in the fields of optics, optical materials.

Ultrafast, scalable laser photothermal synthesis and writing of uniformly dispersed metal nanoclusters in polymer films

Nanoscale ◽  
2019 ◽  
Vol 11 (28) ◽  
pp. 13354-13365 ◽  
Author(s):  
Pankaj Ghildiyal ◽  
Yong Yang ◽  
Dylan J. Kline ◽  
Scott Holdren ◽  
Michael R. Zachariah
Keyword(s):  
Metal Nanoparticles ◽  
Polymer Films ◽  
Metal Nanoclusters ◽  
High Concentration ◽  
Laser Synthesis

This paper presents a fast CO2 laser synthesis and writing technique – laser photothermal synthesis and writing (LPSW) – to generate and write a high concentration of unaggregated, spherical sub-10 nm metal nanoparticles (sMNPs).

The surface chemistry of iron oxide nanocrystals: surface reduction of γ-Fe2O3 to Fe3O4 by redox-active catechol surface ligands

2018 ◽  
Vol 6 (2) ◽  
pp. 326-333 ◽  
Author(s):  
P. Daniel ◽  
S. I. Shylin ◽  
H. Lu ◽  
M. N. Tahir ◽  
M. Panthöfer ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Iron Oxide ◽  
Surface Chemistry ◽  
Surface Functionalization ◽  
Surface Ligands ◽  
Surface Reduction ◽  
Redox Active ◽  
Structural And Magnetic Properties ◽  
Effect Of Surface

The effect of surface functionalization on the structural and magnetic properties of catechol-functionalized iron oxide magnetic (γ-Fe2O3) nanocrystals was investigated.

Effect of Surface Charge and Electrode Material on the Size-Dependent Oxidation of Surface-Attached Metal Nanoparticles

Langmuir ◽  
2014 ◽  
Vol 30 (43) ◽  
pp. 13075-13084 ◽  
Author(s):  
Rafael A. Masitas ◽  
Irina V. Khachian ◽  
Bryan L. Bill ◽  
Francis P. Zamborini
Keyword(s):  
Surface Charge ◽  
Metal Nanoparticles ◽  
Electrode Material ◽  
Size Dependent ◽  
Effect Of Surface
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