scholarly journals σ-Holes and σ-lumps direct the Lewis basic and acidic interactions of noble metal nanoparticles: introducing regium bonds

2018 ◽  
Vol 20 (4) ◽  
pp. 2676-2692 ◽  
Author(s):  
Joakim Halldin Stenlid ◽  
Adam Johannes Johansson ◽  
Tore Brinck
Keyword(s):  
Gold Nanoparticles ◽  
Charge Transfer ◽  
Metal Nanoparticles ◽  
Noble Metal ◽  
Noble Metal Nanoparticles ◽  
Silver And Gold Nanoparticles ◽  
Acidic Sites

Using local DFT-based probes for electrostatic as well as charge transfer/polarization interactions, we are able to characterize Lewis basic and acidic sites on copper, silver and gold nanoparticles.

Moxifloxacin-capped noble metal nanoparticles as potential urease inhibitors

2015 ◽  
Vol 39 (10) ◽  
pp. 8080-8086 ◽  
Author(s):  
Muhammad Nisar ◽  
Shujaat Ali Khan ◽  
Muhammad Raza Shah ◽  
Ajmal Khan ◽  
Umar Farooq ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Antibacterial Activity ◽  
Metal Nanoparticles ◽  
Noble Metal ◽  
Noble Metal Nanoparticles ◽  
Urease Inhibitors ◽  
Urease Inhibition ◽  
Silver And Gold Nanoparticles

The fluoroquinolone drug moxifloxacin (Mox) has been used to protect silver and gold nanoparticles. The nano-conjugates exhibited urease inhibition and antibacterial activity.

Heterogeneous gap-mode nanostructure for surface-enhanced Raman spectroscopic evaluation of charge transfer between noble metal nanoparticles and formaldehyde vapor

Nanoscale ◽  
2018 ◽  
Vol 10 (41) ◽  
pp. 19478-19483
Author(s):  
Dongha Shin
Keyword(s):  
Charge Transfer ◽  
Metal Nanoparticles ◽  
Noble Metal ◽  
Noble Metal Nanoparticles ◽  
Raman Spectroscopic ◽  
Organic Vapor ◽  
Surface Enhanced ◽  
Formaldehyde Vapor ◽  
Surface Enhanced Raman ◽  
Gap Mode

The NC stretching bands in heterogeneous gap-mode nanostructures present the change of surface potential of noble metal nanoparticles interacting with organic vapor.

scholarly journals Silver and Gold Nanoparticles from Limnophila rugosa Leaves: Biosynthesis, Characterization, and Catalytic Activity in Reduction of Nitrophenols

2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
Van Thuan Le ◽  
Ngoc Nhu Quynh Ngu ◽  
Tan Phat Chau ◽  
Thi Dung Nguyen ◽  
Van Toan Nguyen ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Gold Nanoparticles ◽  
Catalytic Activity ◽  
Metal Nanoparticles ◽  
Leaf Extract ◽  
Noble Metal Nanoparticles ◽  
Metallic Ions ◽  
Ftir Microscopy ◽  
X Ray ◽  
Silver And Gold Nanoparticles

This study describes a simple green method for the synthesis of Limnophila rugosa leaf-extract-capped silver and gold nanoparticles without using any expensive toxic reductant or stabilizer. The noble metal nanoparticles were characterized by Fourier transform infrared (FTIR) microscopy, powder X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), energy-dispersive X-ray analysis (EDX), high-resolution transmission electron microscopy (HR-TEM), selected area electron diffraction (SAED), and dynamic light scattering (DLS) method. It has been found that the biosynthesized silver and gold nanoparticles are nearly spherical in shape with a mean particle size distribution of 87.5 nm and 122.8 nm, respectively. XRD and SAED patterns confirmed the crystalline nanostructure of the metal nanoparticles. FTIR spectra revealed the functional groups of biomolecules presented in the extract possibly responsible for reducing metallic ions and stabilizing formed nanoparticles. The biosynthesized metal nanoparticles have potential application in catalysis. Compared to previous reports, Limnophila rugosa leaf-extract-capped silver and gold nanoparticles exhibited a good catalytic activity in the reduction of several derivatives of nitrophenols including 1,4-dinitrobenzene, 2-nitrophenol, 3-nitrophenol, and 4-nitrophenol.

Photocatalytic synthesis of gold nanoparticles using TiO2 nanorods: a mechanistic investigation

2019 ◽  
Vol 21 (34) ◽  
pp. 18753-18757 ◽  
Author(s):  
Qipeng Lu ◽  
Lijie Zhu ◽  
Sumei Han ◽  
Yanbing Hou ◽  
Wenbin Cao
Keyword(s):  
Gold Nanoparticles ◽  
Metal Nanoparticles ◽  
Noble Metal ◽  
Tio2 Nanorods ◽  
Noble Metal Nanoparticles ◽  
Mechanistic Investigation ◽  
Photocatalytic Synthesis

Herein, we investigate the mechanism of photocatalytic synthesis of noble metal nanoparticles by reductive photoelectrons generated from semiconductors.

An insight into the binding behavior of graphene oxide and noble metal nanoparticles

2021 ◽  
Vol 129 (12) ◽  
pp. 125302
Author(s):  
Wajeeha Saeed ◽  
Zeeshan Abbasi ◽  
Shumaila Majeed ◽  
Sohail Anjum Shahzad ◽  
Abdul Faheem Khan ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Metal Nanoparticles ◽  
Noble Metal ◽  
Noble Metal Nanoparticles ◽  
Binding Behavior ◽  
Insight Into
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