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).

scholarly journals Immobilized anticancer agents and metal nanoparticles in a matrix of gellan: achievements and prospects

2020 ◽  
pp. 32-41
Author(s):  
Zhanar Nurakhmetova ◽  
Gulnur Tatykhanova ◽  
Sarkyt Kudaibergenov
Keyword(s):  
Metal Nanoparticles ◽  
Anticancer Drugs ◽  
Anticancer Agents ◽  
Photothermal Therapy ◽  
Conformational Transition ◽  
Physical Adsorption ◽  
Sol Gel ◽  
High Concentration ◽  
Gold And Silver Nanoparticles ◽  
Plasmonic Photothermal Therapy

A review is devoted to recent achievements in development of anticancer drugs based on natural polysaccharide – gellan that possesses coil-helix conformational transition, sol-gel phase transition, thermo- and salt sensitivity. The characteristics of high- and low-acyl gellan are briefly given and the influence of mono- and multivalent metal ions on the gelation efficiency is described. The mucoadhesive properties of gellan and its modified derivatives are briefly considered in the context of application in pharmacy as oral, buccal, nasal, ophthalmologic, vaginal forms. The main attention is paid to anticancer drugs, gold and silver nanoparticles immobilized within gellan matrix by chemical bonds, physical adsorption and chemosorption. The state-of-the art and perspectives of development of plasmonic photothermal therapy of cancer cells that is one of the promising direction of nanomedicine in diagnosis and treatment of oncological diseases are highlighted. It is outlined that the further strategy of development and application of plasmonic photothermal therapy into clinical practice is due to selection of metal nanoparticles with optimal sizes, high concentration, low cytotoxicity and suitable optical characteristics.

scholarly journals Metal Nanoparticles: Rapid One-Pot Preparation of Large Freestanding Nanoparticle-Polymer Films (Small 2/2017)

Small ◽  
2017 ◽  
Vol 13 (2) ◽  
Author(s):  
Yikai Xu ◽  
Magdalena P. Konrad ◽  
Johann L. Trotter ◽  
Colin P. McCoy ◽  
Steven E. J. Bell
Keyword(s):  
Metal Nanoparticles ◽  
Polymer Films ◽  
One Pot

scholarly journals In situ formation of mononuclear complexes by reaction-induced atomic dispersion of supported noble metal nanoparticles

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Siquan Feng ◽  
Xiangen Song ◽  
Yang Liu ◽  
Xiangsong Lin ◽  
Li Yan ◽  
...  
Keyword(s):  
Metal Nanoparticles ◽  
Noble Metal ◽  
High Surface ◽  
Volume Ratio ◽  
Noble Metal Nanoparticles ◽  
General Strategy ◽  
Metal Nanoclusters ◽  
Metal Site ◽  
Mononuclear Complexes

AbstractSupported noble metal nanoclusters and single-metal-site catalysts are inclined to aggregate into particles, driven by the high surface-to-volume ratio. Herein, we report a general method to atomically disperse noble metal nanoparticles. The activated carbon supported nanoparticles of Ru, Rh, Pd, Ag, Ir and Pt metals with loading up to 5 wt. % are completely dispersed by reacting with CH3I and CO mixture. The dispersive process of the Rh nanoparticle is investigated in depth as an example. The in-situ detected I• radicals and CO molecules are identified to promote the breakage of Rh-Rh bonds and the formation of mononuclear complexes. The isolated Rh mononuclear complexes are immobilized by the oxygen-containing functional groups based on the effective atomic number rule. The method also provides a general strategy for the development of single-metal-site catalysts for other applications.

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