Incorporation of Metal Nanoparticles into Block Copolymer Nanodomains via in-Situ Reduction of Metal Ions in Microdomain Space

1999 ◽  
Vol 32 (20) ◽  
pp. 6867-6870 ◽  
Author(s):  
Takeji Hashimoto ◽  
Masafumi Harada ◽  
Naoki Sakamoto
Keyword(s):  
Block Copolymer ◽  
Metal Ions ◽  
Metal Nanoparticles ◽  
In Situ Reduction

Controllable assembly of two types of metal nanoparticles onto block copolymer nanospheres with ordered spatial distribution

2015 ◽  
Vol 3 (7) ◽  
pp. 3382-3389 ◽  
Author(s):  
Shilin Mei ◽  
Jie Cao ◽  
Yan Lu
Keyword(s):  
Spatial Distribution ◽  
Block Copolymer ◽  
Metal Nanoparticles ◽  
Catalytic Properties ◽  
Reduction Process ◽  
Template Method ◽  
Core Shell ◽  
Aao Template ◽  
Shell Particles

Pd@PS-P2VP @DT–Au core–shell particles are fabricated based on the modified AAO template method and anin situreduction process, showing efficient optical and catalytic properties.

scholarly journals Fabrication of Pore-Selective Metal-Nanoparticle-Functionalized Honeycomb Films via the Breath Figure Accompanied by In Situ Reduction

Polymers ◽  
2021 ◽  
Vol 13 (3) ◽  
pp. 316
Author(s):  
Yongjiang Li ◽  
Xiaoyan Ma ◽  
Jingyu Ma ◽  
Zongwu Zhang ◽  
Zhaoqi Niu ◽  
...  
Keyword(s):  
Metal Nanoparticles ◽  
Metal Salt ◽  
Surface Enhanced Raman Spectroscopy ◽  
Reduction Reaction ◽  
Metal Nanoparticle ◽  
In Situ Reduction ◽  
Promoting Effect ◽  
Breath Figure ◽  
Breath Figure Method

Honeycomb films pore-filled with metal (Au, Ag, and Cu) nanoparticles were successfully prepared by combining the breath figure method and an in situ reduction reaction. First, a polyhedral oligomeric silsesquioxane (POSS)-based star-shaped polymer solution containing metal salt was cast under humid conditions for the formation of honeycomb films pore-filled with metal salt through the breath figure method. The morphology of the honeycomb films was mainly affected by the polymer molecular structure and the metal salt. Interestingly, the promoting effect of the metal salt in the breath figure process was also observed. Then, honeycomb films pore-filled with metal nanoparticles were obtained by in situ reduction of the honeycomb films pore-filled with metal salt using NaBH4. Notably, the metal nanoparticles can be selectively functionalized in the pores or on the surface of the honeycomb films by controlling the concentration of the NaBH4. Metal-nanoparticle-functionalized honeycomb films can prospectively be used in catalysis, flexible electrodes, surface-enhanced Raman spectroscopy (SERS), and wettability patterned surfaces.

scholarly journals Growth kinetics of metal nanoparticles on solid surfaces

2014 ◽  
Vol 70 (a1) ◽  
pp. C1176-C1176
Author(s):  
Ezzeldin Metwalli
Keyword(s):  
Block Copolymer ◽  
Metal Nanoparticles ◽  
Growth Kinetics ◽  
Particle Growth ◽  
Polymer Surfaces ◽  
Particle Mobility ◽  
Metal Interactions ◽  
Metal Metal ◽  
Kinetics Of

Dispersed metal nanoparticles (nps) in a polymer matrix are essential for many technological applications, including biological imaging, thin film technology, magnetic recording media, optoelectronics and sensors. Real time investigation of the evolution of nps size and shape during the in-situ metal deposition on polymer thin films enables a fine tune of magnetic and electric properties. Metals in their atomic state are deposited on several homopolymer and block copolymer films by DC magnetron system (Metwalli et al., 2013, Metwalli et al., 2008, Buffet et al., 2011). With the unprecedented time resolution of 10 milliseconds, the growth kinetics of the metal nps on the polymer surfaces is monitored using in-situ GISAXS. An exponential growth of nps size on all polymer surfaces is observed. Below a certain critical nps size, an initial fast particle growth is due to high particle mobility. A slower kinetics at concentrated metal dispersion is due to the strong metal-metal interactions. The metal growth kinetics study for many chemically different homopolymer films explains the long-time debated high selectivity characteristics of metals towards one block in block copolymer based nano-templates.

Catalytic asymmetric hydrogenation reaction by in situ formed ultra-fine metal nanoparticles in live thermophilic hydrogen-producing bacteria

Nanoscale ◽  
2021 ◽  
Author(s):  
Wei Bing ◽  
Faming Wang ◽  
Yuhuan Sun ◽  
Jinsong Ren ◽  
Xiaogang Qu
Keyword(s):  
Metal Nanoparticles ◽  
Catalytic Hydrogenation ◽  
Asymmetric Hydrogenation ◽  
Environmentally Friendly ◽  
Hydrogenation Reaction ◽  
Highly Efficient ◽  
Hydrogenation Reactions ◽  
Live Bacteria ◽  
Catalytic Asymmetric Hydrogenation

An environmentally friendly biomimetic strategy has been presented and validated for the catalytic hydrogenation reaction in live bacteria. In situ formed ultra-fine metal nanoparticles can realize highly efficient asymmetric hydrogenation reactions.

In-situ formed Co from Co-Mg-O solid solution synergizing with LiH for efficient ammonia synthesis

2021 ◽  
Author(s):  
Wenbo Gao ◽  
Sheng Feng ◽  
Hanxue Yan ◽  
Qianru Wang ◽  
Hua Xie ◽  
...  
Keyword(s):  
Solid Solution ◽  
Metal Nanoparticles ◽  
Magnesium Oxide ◽  
Ammonia Synthesis ◽  
Oxide Solid Solution ◽  
In Situ Formation

A cobalt magnesium oxide solid solution (Co-Mg-O) supported LiH catalyst has been synthesized, in which LiH functions both as a strong reductant for in-situ formation of Co metal nanoparticles and...

Catalytic dehydrogenation of amines to imines and the in-situ reduction of sulfoxides into sulfides

2021 ◽  
Author(s):  
Xixi Liu ◽  
Yanxin Wang ◽  
Bo Li ◽  
Bing Liu ◽  
Wei Wang ◽  
...  
Keyword(s):  
Catalytic Dehydrogenation ◽  
In Situ Reduction

Physicochemical properties of geopolymer composites with DFT calculations of in-situ reduction of graphene oxide

2021 ◽  
Author(s):  
Amun Amri ◽  
Ahmad Ainun Najib ◽  
Monita Olivia ◽  
Mohammednoor Altarawneh ◽  
Aman Syam ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Dft Calculations ◽  
Physicochemical Properties ◽  
In Situ Reduction ◽  
Geopolymer Composites
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