Continuous Electrophoretic Deposition and Electrophoretic Mobility of Ligand-Free, Metal Nanoparticles in Liquid Flow

2015 ◽  
Vol 162 (4) ◽  
pp. D174-D179 ◽  
Author(s):  
Sven Koenen ◽  
René Streubel ◽  
Jurij Jakobi ◽  
Kerstin Schwabe ◽  
Joachim K. Krauss ◽  
...  
Keyword(s):  
Metal Nanoparticles ◽  
Electrophoretic Mobility ◽  
Electrophoretic Deposition ◽  
Liquid Flow ◽  
Ligand Free ◽  
Free Metal

scholarly journals Cysteine-containing oligopeptide β-sheets as redispersants for agglomerated metal nanoparticles

2015 ◽  
Vol 3 (34) ◽  
pp. 17612-17619 ◽  
Author(s):  
Tsukasa Mizutaru ◽  
Taro Sakuraba ◽  
Toru Nakayama ◽  
Galina Marzun ◽  
Philipp Wagener ◽  
...  
Keyword(s):  
Amino Acid ◽  
Metal Nanoparticles ◽  
Amino Acid Residues ◽  
Ligand Free ◽  
Β Sheets ◽  
Free Metal

Fmoc-pentapeptide β-sheets with amino acid residues of cysteine, lysine and valine work as redispersants for agglomerated ligand-free metal nanoparticles.

Ligand-Free Metal Clusters

1983 ◽  
Vol 22 (9) ◽  
pp. 674-694 ◽  
Author(s):  
Geoffrey A. Ozin ◽  
Steven A. Mitchell
Keyword(s):  
Metal Clusters ◽  
Ligand Free ◽  
Free Metal

How Electrophoretic Deposition with Ligand-Free Platinum Nanoparticles Affects Contact Angle

2015 ◽  
Vol 654 ◽  
pp. 218-223 ◽  
Author(s):  
Alexander Heinemann ◽  
Sven Koenen ◽  
Kerstin Schwabe ◽  
Christoph Rehbock ◽  
Stephan Barcikowski
Keyword(s):  
Contact Angle ◽  
Electrophoretic Deposition ◽  
Platinum Nanoparticles ◽  
Deposition Time ◽  
Deposition Process ◽  
Angle Measurements ◽  
Contact Angle Measurements ◽  
Ligand Free ◽  
Vital Parameters ◽  
Scanning Electron

Electrophoretic deposition of ligand-free platinum nanoparticles has been studied to elucidate how wettability, indicated by contact angle measurements, is linked to vital parameters of the electrophoretic deposition process. These parameters, namely the colloid concentration, electric field strength and deposition time, have been systematically varied in order to determine their influence on the contact angle. Additionally, scanning electron microscopy has been used to confirm the homogeneity of the achieved coatings.

Metal nanoparticles: ligand free approach towards coupling reactions

2021 ◽  
Vol 01 ◽  
Author(s):  
Sharwari K. Mengane ◽  
Ronghui Wu ◽  
Liyun Ma ◽  
Chhaya S. Panse ◽  
Shailesh N. Vajekar ◽  
...  
Keyword(s):  
Heterogeneous Catalysis ◽  
Metal Nanoparticles ◽  
Surface Area ◽  
Heterogeneous Catalysts ◽  
High Surface ◽  
High Surface Area ◽  
Reaction Medium ◽  
Coupling Reactions ◽  
Research Activities ◽  
Ligand Free

: Catalysis is the multidisciplinary field involving many areas of chemistry, notably in organometallic chemistry and materials science. It has great applications in synthesis of many industrially applicable compounds such as fuels and fine chemicals. The activity and selectivity are a key issue in catalysis that generally allied to high surface area. The current research activities mainly deal with the homogeneous and heterogeneous catalysis. Homogeneous and heterogeneous catalysis have certain drawbacks which restricts their application to great extent but have their own advantages. Hence, it has a predominant concern of current research to find out an alternate to overcome their drawbacks. Therefore, it is highly desirable to find a catalytic protocol that offers high selectivity and excellent product yield with quick and easy recovery. Along with their various applications as alternatives to conventional bulk materials nanomaterial have established its great role in different industrial and scientific applications. Nanocatalysis has emerged as new alternative to the conventional homogeneous and heterogeneous catalysis. The nanomaterials are responsible to enhance surface area of the catalyst, which ultimately increases the catalyst reactants contacts. In addition, it acts as robust material and has high surface area like heterogeneous catalysts. Insolubility of such nanomaterial in reaction medium makes them easily separable, hence, catalyst can be easily separate from the product. Hence, it has been proven that nanocatalysts behave like homogeneous as well as heterogeneous catalysts which work as a bridge between the conventional catalytic systems. Considering these merits; researchers has paid their attention towards applications of nanocatalyst in several organic reactions. This review article focused on the catalytic applications of metal nanoparticles (MNPs) such as Pd, Ag, Au, Cu, Pt in ligand free coupling reactions. In addition, it covers applications of bimetallic and multimetallic nanoparticles in ligand free coupling reactions.

Carbon nanopore and anchoring site–assisted general construction of encapsulated metal (Rh, Ru, Ir) nanoclusters for highly efficient hydrogen evolution in pH–universal electrolytes and natural seawater

2021 ◽  
Author(s):  
Rong Ding ◽  
Tingting Yan ◽  
Yi Wang ◽  
Yan Long ◽  
Guangyin Fan
Keyword(s):  
Hydrogen Evolution ◽  
Water Splitting ◽  
General Construction ◽  
Natural Seawater ◽  
Metal Nanoclusters ◽  
Hydrogen Economy ◽  
Ligand Free ◽  
Metal Nanocluster ◽  
Substantial Interest ◽  
Free Metal

Metal–nanocluster–catalyzed hydrogen evolution through water splitting has received substantial interest toward the implementation of hydrogen economy. However, the general and efficient fabrication of well–defined and ligand–free metal nanoclusters (NCs) with...

scholarly journals Metals and Metal-Nanoparticles in Human Pathologies: From Exposure to Therapy

Molecules ◽  
2021 ◽  
Vol 26 (21) ◽  
pp. 6639
Author(s):  
Joanna Izabela Lachowicz ◽  
Luigi Isaia Lecca ◽  
Federico Meloni ◽  
Marcello Campagna
Keyword(s):  
Metal Ions ◽  
Metal Nanoparticles ◽  
Genetic Disorders ◽  
Qualitative And Quantitative Analysis ◽  
Essential Metal ◽  
Qualitative And Quantitative ◽  
Surrounding Environment ◽  
Chelating Ability ◽  
Free Metal

An increasing number of pathologies correlates with both toxic and essential metal ions dyshomeostasis. Next to known genetic disorders (e.g., Wilson’s Disease and β-Thalassemia) other pathological states such as neurodegeneration and diabetes are characterized by an imbalance of essential metal ions. Metal ions can enter the human body from the surrounding environment in the form of free metal ions or metal-nanoparticles, and successively translocate to different tissues, where they are accumulated and develop distinct pathologies. There are no characteristic symptoms of metal intoxication, and the exact diagnosis is still difficult. In this review, we present metal-related pathologies with the most common onsets, biomarkers of metal intoxication, and proper techniques of metal qualitative and quantitative analysis. We discuss the possible role of drugs with metal-chelating ability in metal dyshomeostasis, and present recent advances in therapies of metal-related diseases.

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