TY  - JOUR
A1  - Khare, Varsha
A1  - Ruby, Christian
A1  - Sonkaria, Sanjiv
T1  - A green and sustainable nanotechnology role of ionic liquids
JF  - International journal of precision engineering and manufacturing
N2  - In the present study, the effects of ionic liquids (ILs) on the stability of nanoparticles in several IL compositions were investigated. In this context, we examined the primary role of ILs in the synthesis of metal/metal oxide nanoparticles and their dispersions extensively. However, the focus of the discussion in this communication centers mainly on the effect of EMIM Ethyl Sulfate on growth and stability of nanoparticles. The dispersion properties of ILs based on their ability to aid the synthesis of uniformly dispersed nanoparticles have been further explored to produce nanoparticles of an effective catalyst useful in water purification, soil remediation and battery applications. Two independent protocols were developed for the synthesis of nanoparticles, namely (a) one pot process via chemical reduction (b) dispersion of the inorganic material in ILs. The protocols are simple, sustainable and environmentally friendly because the processes are conducted in ILs as harmless non-toxic green solvent materials. The catalysts were analyzed by x-ray diffraction, electron microscopy, UV visible spectroscopy and dynamic light scattering as the main methodologies.
KW  - Nanotechnology
KW  - Green synthesis
KW  - Ionic liquid
KW  - Green rust
KW  - Gold nanoparticles
Y1  - 2012
U6  - https://doi.org/10.1007/s12541-012-0160-x
SN  - 2234-7593
VL  - 13
IS  - 7
SP  - 1207
EP  - 1213
PB  - Korean Society of Precision Engineering
CY  - Seoul
ER  - 
TY  - JOUR
A1  - Koeth, Anja
A1  - Tiersch, Brigitte
A1  - Appelhans, Dietmar
A1  - Gradzielski, Michael
A1  - Cölfen, Helmut
A1  - Koetz, Joachim
T1  - Synthesis of Core-Shell Gold Nanoparticles with Maltose-Modified Poly(Ethyleneimine)
JF  - Journal of dispersion science and technology
N2  - The synthesis of ultrafine gold nanoparticles in presence of maltose-modified hyperbranched poly(ethyleneimines) (PEI) is described. The polymer acted as both a reducing and stabilising agent in the particle formation process. The nanoparticles were characterized by means of dynamic light scattering (DLS), transmission electron microscopy (TEM), analytical ultracentrifugation (AUC), small-angle x-ray scattering (SAXS), and small-angle neutron scattering (SANS). The mechanism of nanoparticle formation can be described in two steps. The reduction process of the Au3+ ions located in the inner coil region of the hyperbranched PEI led to the formation of a compact gold core, and is accompanied by a collapse of the polymer coil. Therefore, in the subsequent reduction process a gold-polymer hybrid shell is formed. By using the PEI of higher molar mass, core-shell gold nanoparticles of about 3.6 nm size with a more narrow size distribution and special fluorescence behavior could be synthesized.
KW  - Gold nanoparticles
KW  - gold-polymer hybrid shell
KW  - maltose-modified poly(ethyleneimine)
Y1  - 2012
U6  - https://doi.org/10.1080/01932691.2010.530084
SN  - 0193-2691
VL  - 33
IS  - 1-3
SP  - 52
EP  - 60
PB  - Taylor & Francis Group
CY  - Philadelphia
ER  -