02534nas a2200277   4500008004100000022001400041245007200055210006900127260009500196300001400291490000600305520159800311653003201909653001501941653003101956653001801987653002102005653002402026653001502050100001902065700002002084700001602104700001602120700001402136856010602150       2005                        eng d  a1533-488000aSynthesis of CdS and alloyed CdMnS nanocrystals using aqueous foams0 aSynthesis of CdS and alloyed CdMnS nanocrystals using aqueous fo  a25650 NORTH LEWIS WAY, STEVENSON RANCH, CA 91381-1439 USAbAMER SCIENTIFIC PUBLISHERScDEC  a2144-21540 v53 a<p>Certain surfactant-stabilized aqueous foams provide a potentially efficient and simple chemical route for the synthesis of various nanomaterials with controllable structure, size, and shape. In the present work, a one-step process for the synthesis of CdS and Cdl(1-x)Mn(x)S (0 &lt; x &lt; 10) nanocrystals has been described. Aqueous CdCl2 and the aerosol-OT solutions are homogeneously mixed together and thereafter, nitrogen is bubbled through this solution to produce stable aqueous foam. After drainage of the foam, the freestanding dry foam consisting of cadmium cations electrostatically complexed with the anionic aerosol-OT molecules at the liquid-gas interface is treated with H2S vapor. The foam turns yellowish-orange and collapses, in the process yielding CdS nanoclusters of variable morphology. This morphology variation is appropriately attributed to growth of the CdS as well as alloyed Cd1-xMnxS nanoparticles in different regions of the foam contributing to the varying topological structure. Optical absorption spectra of both CdS and Cd1-xMnxS nanoparticles clearly show a well-defined exciton absorption feature around 450 nm due to quantum confinement effects. The interesting band edge emission characteristics of these AOT-capped CdS and Cd1-xMnxS nanoparticles produced in the foam are discussed with respect to their size and shape. Particular interest in the present novel aqueous foam approach arises due to the fact that the cubic zincblende CdS and alloyed Cd1-xMnxS nanocrystals could easily be obtained even under ambient experimental conditions itself.</p>10aabsorption and fluorescence10aaerosol-OT10aalloyed CdMnS nanocrystals10aaqueous foams10aCdS nanoclusters10aquantum confinement10azincblende1 aKumar, Senthil1 aKasture, Manasi1 aRaghavan, U1 aPasricha, R1 aSastry, M  uhttps://library.ncl.res.in/content/synthesis-cds-and-alloyed-cdmns-nanocrystals-using-aqueous-foams-001682nas a2200193   4500008004100000022001400041245012000055210006900175260011000244300001400354490000700368520087800375100001801253700002001271700002001291700003001311700001501341856013201356       2005                        eng d  a0959-942800aSynthesis of gold, silver and their alloy nanoparticles using bovine serum albumin as foaming and stabilizing agent0 aSynthesis of gold silver and their alloy nanoparticles using bov  aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcOCT  a5115-51210 v153 a<p>A simple and convenient method for the synthesis of gold, silver and their alloy nanoparticles in a foam matrix using the protein bovine serum albumin (BSA) is reported. BSA is an excellent foaming agent and, by virtue of its zwitterionic character at the protein isoelectric point, may be used to bind to either cationic silver (Ag+) or anionic gold (AuCl4-) ions in the foam. The metal ions in the foam are thereafter reduced in situ to yield silver and gold nanoparticles. The versatility of an amphoteric foaming agent is further demonstrated by the simultaneous binding of Ag+ and AuCl4- ions with zwitterionic BSA leading to the possibility of obtaining Au-Ag alloy nanoparticles in the foam. The BSA molecules coat and stabilize the nanoparticles thus prepared eliminating the necessity of employing an additional stabilizing agent in the experimental recipe.</p>1 aSingh, A., V.1 aBandgar, B., M.1 aKasture, Manasi1 aPrasad, Bhagavatula L. V.1 aSastry, M.  uhttps://library.ncl.res.in/content/synthesis-gold-silver-and-their-alloy-nanoparticles-using-bovine-serum-albumin-foaming-and-0