TY  - JOUR
VL  - 13
JF  - Arabian Journal of Chemistry
A1  - Irfan, M.
A1  - Ahmad, T.
A1  - Moniruzzaman, M.
A1  - Bhattacharjee, S.
A1  - Abdullah, B.
UR  - https://www.scopus.com/inward/record.uri?eid=2-s2.0-85013680597&doi=10.1016%2fj.arabjc.2017.02.001&partnerID=40&md5=b75e7be7bd43b120d80be40c89542d54
Y1  - 2020///
ID  - scholars14100
KW  - Colloids; Convergence of numerical methods; Dynamic light scattering; Extraction; Fiber optic sensors; Gold nanoparticles; High resolution transmission electron microscopy; Ionic liquids; Metal nanoparticles; Morphology; Palm oil; Particle size; Stability; Synthesis (chemical); Zeta potential
KW  -  1-ethyl-3-methylimidazolium acetates; Colloidal Stability; Eco-friendly process; Elaeis guineensis; Functionalized gold nanoparticles; Maximum absorbance; Particle growth; UV-Vis spectrophotometers
KW  -  Particle size analysis
N2  - Bio-synthesis approach for gold nanoparticles (AuNPs) has received tremendous attention as an efficient and eco-friendly process. However, kinetic growth and colloidal stability of AuNPs synthesized by this process remained challenging. In this study, Elaeis guineensis (oil palm) kernel (OPK) extract prepared in an ionic liquid (IL)EMIMOAc (1-ethyl-3-methylimidazolium acetate) was employed to control and tune the size and morphology of AuNPs. Synthesized AuNPs were characterized using UV-vis spectrophotometer, dynamic light scattering (DLS) and transmission electron microscopy (TEM) to observe any changes in absorbance, surface charge and particle size, respectively. IL mediated AuNPs were examined for 120 days and found well dispersed and stable at room temperature. UV-vis analysis demonstrated that volume of extract played an important role to control the stability of AuNPs. After 120 days, only 8.86% reduction from maximum absorbance was observed using 2 mL of volume of extract, which was elevated to 47.64% in case of 0.3 mL. TEM analysis was performed periodically after day 1, day 30, day 60, day 90 and day 120 and minor increase in the size was observed. Insignificant change in zeta potential value after 120 days supported enhanced stability of IL mediated AuNPs. Crystalline nature of AuNPs was confirmed by X-ray diffraction (XRD) pattern. The particles size and zeta potential of AuNPs was measured as 8.72 nm and â??18.7 mV, respectively. However, the absence of EMIMOAc from OPK extract resulted into larger particles size (9.64 nm), low zeta potential value (â??13.9 mV) and enhanced aggregation of particles. Finally, experimental data were used to predict the theoretical and the experimental settling time for AuNPs to evaluate colloidal stability. © 2017 The Authors
IS  - 1
EP  - 85
PB  - Elsevier B.V.
SN  - 18785352
TI  - Size and stability modulation of ionic liquid functionalized gold nanoparticles synthesized using Elaeis guineensis (oil palm) kernel extract
SP  - 75
N1  - cited By 37
AV  - none
ER  -