scholarly journals In situ self-assembly of gold nanoparticles on hydrophilic and hydrophobic substrates for influenza virus-sensing platform

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Syed Rahin Ahmed ◽  
Jeonghyo Kim ◽  
Van Tan Tran ◽  
Tetsuro Suzuki ◽  
Suresh Neethirajan ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Influenza Virus ◽  
Self Assembly ◽  
Sensing Platform

scholarly journals In Situ Self-Assembly of Ultrastable Gold Nanoparticles on Polyvinyl Alcohol Nanofibrous Mats for Use as Highly Reusable Catalysts

ACS Omega ◽  
2019 ◽  
Vol 4 (22) ◽  
pp. 20094-20100
Author(s):  
Lin Xu ◽  
Hongping Xiang ◽  
Zhengjian Chen ◽  
Xu Zhang
Keyword(s):  
Gold Nanoparticles ◽  
Polyvinyl Alcohol ◽  
Self Assembly

Monitoring pattern formation in drying and wetting dispersions of gold nanoparticles by ESEM

2015 ◽  
Vol 181 ◽  
pp. 281-298 ◽  
Author(s):  
Casper Kunstmann-Olsen ◽  
Domagoj Belić ◽  
Mathias Brust
Keyword(s):  
Gold Nanoparticles ◽  
Self Assembly ◽  
Early Stage ◽  
Environmental Scanning Electron Microscopy ◽  
Water Soluble ◽  
Environmental Scanning ◽  
Evaporation And Condensation ◽  
Lift Off ◽  
Poly Ethylene

We report an investigation of the self-assembly of patterns from functionalized gold nanoparticles (GNPs) by monitoring the process in situ by environmental scanning electron microscopy (ESEM) during both evaporation and condensation of the dispersant. As this method limits the choice of dispersants to water, GNPs functionalized with hydrophilic thiol ligands, containing poly(ethylene)glycol (PEG) groups, were used on a variety of substrates including pre-patterned ones. Particular emphasis was given to early stage deposition of GNPs, as well as redispersion and lift-off upon condensation of water droplets. ESEM presents a unique opportunity of directly imaging such events in situ. It was found that attractive interactions between the substrate and the GNPs are often stronger than expected once the particles have been deposited. The role of nickel perchlorate as a highly water-soluble additive was studied. It was found that entropically driven deposition of particles and decoration of surface features was enhanced in its presence, as expected.

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