01699nas a2200241   4500008004100000022001400041245007800055210006900133260009500202300001400297490000600311520088200317653001901199653000901218653001201227653001601239653001801255653002301273100002001296700001701316700001901333856010501352       2005                        eng d  a1533-488000aSynthesis of gold nanospheres and nanotriangles by the Turkevich approach0 aSynthesis of gold nanospheres and nanotriangles by the Turkevich  a25650 NORTH LEWIS WAY, STEVENSON RANCH, CA 91381-1439 USAbAMER SCIENTIFIC PUBLISHERScOCT  a1721-17270 v53 a<p>Gold nanoparticles of triangular morphology possess interesting optical properties with potential application in medicine and infrared absorbing coatings, however, little is known about conditions that favor their growth. In this paper, we have reinvestigated a time-tested recipe for the formation of gold nanospheres by citrate reduction of aqueous gold ions under boiling conditions (Turkevich recipe). Our principle findings are that gold nanotriangle formation is kinetically controlled and is highly favored at low temperatures. Furthermore, the presence of chloride ions from the precursor chloroaurate ions plays a major role in promoting the growth of [111] oriented triangular/truncated triangular particles. The presence of bromide and iodide ions that possess the ability to replace surface-bound chloride ions inhibits triangle formation to varying degrees.</p>10aCrystal growth10aGold10ahalides10ananospheres10ananotriangles10aTemperature effect1 aShankar, S., S.1 aBhargava, S.1 aSastry, Murali  uhttps://library.ncl.res.in/content/synthesis-gold-nanospheres-and-nanotriangles-turkevich-approach-1