Interest in semiconductor nanocrystals (both colloidal and self-assembled) has steadily grown in the past two decades [1–4]. Such interest was initially motivated by an academic desire to understand their unique optical and spectroscopic properties, but has more recently been strengthened by several technological developments based 370on exploiting some of those properties [1–6]. Applications in optical and electronic devices, such as absorption filters [5], light emitting diodes [6–9], and photovoltaic cells [10,11] have been supplemented by a high potential for use in biology [12,13]. These applications have created a stronger need to develop versatile chemical routes for preparing new and better materials.