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Fig. 5 | Nanoscale Research Letters

Fig. 5

From: Characterization of Conventional One-Step Sodium Thiosulfate Facilitated Gold Nanoparticle Synthesis

Fig. 5

Effect of temperature on conventional one-step gold-gold sulfide synthesis. Room temperature reaction provides characteristic NIR peak (800 nm) and minimal gold colloid peak (520 nm) with the production of polydisperse nanoparticles. At lower temperatures (0 °C), the presence of larger gold nanoplates results in red-shifting and broadening of the NIR peak. At higher temperatures (50 °C), the dramatic increase in icosahedral nanoparticles results in diminished NIR peak. Scale bars represent 200 nm

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