SiO₂-Coated CdTe Nanowires:  Bristled Nano Centipedes

Abstract

CdTe nanowires with bristled SiO 2 coatings resembling nanoscale centipedes were produced in a modified Sto 1ber process when mercaptosuccinic acid was used as a stabilizer. The reason for the unusual morphology of the coating is believed to be the nonuniform distribution of the stabilizers on the surface of the nanowire. Atomistic calculations of CdTe nanoparticles as a simplified model of a nanowire surface reveal that phase separation of the mercaptosuccinic acid and (3-mercaptopropyl)trimethoxysilane is an energetically favorable process. These data indicate that the heterogeneity of the nanocolloid surface is an important property that may be taken advantage of for preparation of nanostructures of high complexity. From a practical perspective, the centipede nanowires can be a uniquely useful material for high-strength nanoscale composites.

Cellular Effect of High Doses of Silica-Coated Quantum Dot Profiled with High Throughput Gene Expression Analysis and High Content Cellomics Measurements

“…It has been reported that Cd 2+ is released from CdSe through oxidative attack. 16,17 This released cadmium can bind to the sulfohydryl groups of critical mitochondria proteins leading to mitochondria dysfunction and ultimately cell poisoning. 18 Qdots are small fluorescent tags that have tremendous potential for advancing knowledge in biology because of their unique characteristics.…”

Aqueous phase synthesis of CdTe quantum dots for biophotonics

“…Several surfactants have been used for synthesizing CdTe quantum dots in the aqueous phase, namely, thioglycolic acid (TGA) [48][49][50], mercaptopropionic acid (MPA) [47], mercaptosucinnic acid (MSA) [51][52], glutathione (GSH) [53], and cysteine (Cys) [54]. TGA, MPA, and MSA are short stabilizing agents and they are commonly used to fabricate water-dispersible CdTe QDs in a one-pot synthesis.…”

Synthesis and Characterization of Si Oxide Coated Nano Ceria by Hydrolysis, and Hydrothermal Treatment at Low Temperature

“…In recent years, nano-structures have attracted much attention due to their potential applications in fabricating nanometer-scale devices possessing a variety of interesting functions [5,6]. Among the methods used to coat the nano-structures to protect against wear and to provide corrosion resistance, a number of researchers have used Si oxide to provide functionality to nano-powders for surface treatment [7,8].…”