Premium
Size Evolution of Gold Nanoparticles in a Millifluidic Reactor
Author(s) -
Li Yuehao,
Sanampudi Ashwin,
Raji Reddy Vanga,
Biswas Sanchita,
Nandakumar Krishnaswamy,
Yemane Dawit,
Goettert Jost,
Kumar Challa S. S. R.
Publication year - 2012
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.201100726
Subject(s) - nanoparticle , residence time distribution , materials science , particle size , particle (ecology) , particle size distribution , transmission electron microscopy , nanotechnology , residence time (fluid dynamics) , colloidal gold , chemical engineering , chemical physics , chemistry , mineralogy , inclusion (mineral) , oceanography , geotechnical engineering , geology , engineering
The size evolution of gold nanoparticles in a millifluidic reactor is investigated using spatially resolved transmission electron microscopy (TEM). The experimental data is supported by numerical simulations, carried out to study the residence‐time distribution (RTD) of tracers that have the same properties as Au ions. Size and size distribution of the particles within the channels are influenced by the mixing zones as well as the RTD. However, the Au nanoparticles obtained show a broader size distribution even at the shortest investigated residence time of 3.53 s, indicating that in addition to surface growth reaction kinetics also plays an important role. The comparison of time resolved particle growth within the millifluidic channel with flask‐based reactions reveals that the particle size can be controlled better within millifluidic channels. Overall, the results indicate potential opportunities to utilize easy to fabricate millifluidic reactors for the synthesis of nanoparticles, as well as as for carrying out time resolved kinetic studies.