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We describe the “sweet nanochemistry” synthesis of starch stabilized silver and gold nanoparticles in a glucose solution rendered basic by the addition of ammonia or sodium hydroxide.

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The Leidenfrost nanochemistry synthesis of gold colloids was introduced in this Journal as an advanced method to synthesize gold nanoparticles during an undergraduate nanochemistry research project. When trying to repeat these experiments in the laboratory, we experienced difficulties in the synthesis of the gold nanoparticles since the droplets undergoing the Leidenfrost phenomenon were evaporated without changing color to the distinctive red-purple of gold nanoparticles. Therefore, we would like to suggest an alternative procedure to perform this gold nanoparticle synthesis through the Leidenfrost nanochemistry phenomenon by using honey instead of trisodium citrate and adjusting the pH with sodium hydroxide.

Abstract:We describe a very simple, two-step synthetic method to prepare gold nanorods with extremely high aspect ratios (> 20) and average lengths of more than 1000 nm. The method is based on a seed-mediated growth in presence of the surfactant cetyltrimethylammonium bromide. The length and aspect ratios of the nanorods can be manipulated by varying the surfactant concentration.