02153nas a2200181   4500008004100000245009600041210006900137260000800206300001200214490000700226520149900233100002101732700001701753700002601770700002601796700002501822856012401847       2017                        eng d00aMedium constituents mediated engineering for size and shape tuning of gold nanocrystallites0 aMedium constituents mediated engineering for size and shape tuni  cJUL  a288-2940 v513 aThe current investigation introduces the utilization of cell culture mediums as a novel source for the one plot synthesis as well as stabilization of metal nanoparticles. By varying the medium constituents we could control the size and shape distributions of the gold nanoparticles. Nanospheres of diameter 24 +/- 6 nm and 19 +/- 5 nm were produced using DMEM and M199 mediums respectively, nanoneedles of 150 +/- 50 nm using RPMI medium and nanoflowers of 60 +/- 25 nm using IMDM medium, with an overall yield of 91 +/- 2%. A remarkable decrease in the reaction duration (<3 min) was noted, irrespective of the growth mediums used. Fourier transform infrared spectroscopy and zeta potential measurements revealed them to have a common protenacious encapping agent with different overall surface charges of -23 +/- 3, -21 +/- 1, -24 +/- 2, and -20 +/- 1 mV for Au@DMEM, Au@RPMI, Au@IMDM and Au@M199 respectively. X-ray diffraction confirmed the purity and crystallinity of the particles with Bragg peaks at (111), (200), (220) and (311) for gold nanocrystals. This approach could lead to the creative utilization of novel eco-friendly sources for the production and size/shape control of nanoparticles. Moreover, the adopted methodology is absolutely green, robust and facile, offering new insights for sustainable synthesis for various biomedical and engineering applications. (C) 2017 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.1 aSuresh, Anil, K.1 aVijay, Veena1 aHameed, Bahrudeen, S.1 aRamasamy, Sureshkumar1 aSakthivel, Natarajan  uhttps://library.ncl.res.in/content/medium-constituents-mediated-engineering-size-and-shape-tuning-gold-nanocrystallites02295nas a2200217   4500008004100000022001400041245007400055210006900129260000800198300001400206490000700220520158900227100002301816700002601839700002101865700002601886700001801912700002301930700002101953856010301974       2019                        eng d  a1744-683X00aCore-composite mediated separation of diverse nanoparticles to purity0 aCorecomposite mediated separation of diverse nanoparticles to pu  cOCT  a7787-77940 v153 a<p>A generalized method for sorting nanoparticles based on their cores does not exist; it is an immediate necessity, and an approach incorporating cost-effectiveness and biocompatibility is in demand. Therefore, an efficient method for the separation of various mixed core-compositions or dissimilar metallic nanoparticles to their pure forms at the nano-bio interface was developed. Various simple core-combinations of monodispersed nanoparticles with dual cores, including silver plus gold, iron oxide plus gold and platinum plus gold, to the complex three-set core-combinations of platinum plus gold plus silver and platinum plus iron plus gold were sorted using step-gradient centrifugation in a sucrose suspension. Viscosity mediated differential terminal velocities of the nanoparticles permitted diversified dragging at different gradients allowing separation. Stability, purity and properties of the nanoparticles during separation were evaluated based on visual confirmation and by employing advanced instrumentations. Moreover, theoretical studies validated our experimental observations, revealing the roles of various parameters, such as the viscosity of sucrose, the density of the particles and the velocity and duration of centrifugation, involved during the separation process. This remarkably rapid, cost-efficient and sustainable strategy can be adapted to separate other cores of nanoparticles for various biomedical research purposes, primarily to understand nanoparticle induced toxicity and particle fate and transformations in natural biotic environments.</p>
1 aBhatt, Chandra, S.1 aNagaraj, Bharathkumar1 aGhosh, Deepanjan1 aRamasamy, Sureshkumar1 aThapa, Ranjit1 aMarpu, Sreekar, B.1 aSuresh, Anil, K.  uhttps://library.ncl.res.in/content/core-composite-mediated-separation-diverse-nanoparticles-purity