title: High quality CdHgTe nanocrystals with strong near-infrared emission: relationship between composition and cytotoxic effects.
abstract: High quality CdHgTe quasi core/shell nanocrystals (NCs) were prepared via the one-step method. The relationship between the composition, structure, and property was systematically investigated by the combination of X-ray photoelectron spectroscopy (XPS), inductively coupled plasma atomic emission (ICP), and the photoluminescence (PL) measurements. The quantum yield (QY) was ~50% when the feed ratio of Cd(2+) to Hg(2+) was equal to 1. The PL property was further polished, and the QY was improved to ~80% through the variance of the prepared conditions such as the ratio of ligand to metal ion and HTe(-) to metal ion, pH value, and temperature. In addition, the cytotoxic effects of CdHgTe NCs were systematically studied. The results showed that, for Cd0.21Hg0.79Te NCs, its quasi core/shell structure was very stable and little cadmium ions were released. As a result, such NCs showed little cytotoxicity and would find applications in tissue imaging or detection.
authors: College of Chemistry, Northeast Normal University, Changchun 130024, P R China.
authors: Wenjing
authors: W
authors: Cai
authors: Liming
authors: L
authors: Jiang
authors: Dongmei
authors: D
authors: Yi
authors: Haizhu
authors: H
authors: Sun
authors: Haotong
authors: H
authors: Wei
authors: Hao
authors: H
authors: Zhang
authors: Hongchen
authors: H
authors: Sun
authors: Bai
authors: B
authors: Yang
mesh_terms: D000818:Animals; D019187:Cadmium Compounds / Q000737:chemistry* / Q000494:pharmacology; D002460:Cell Line; D002470:Cell Survival / Q000187:drug effects; D005347:Fibroblasts / Q000166:cytology / Q000187:drug effects; D006863:Hydrogen-Ion Concentration; D008163:Luminescent Measurements; D017669:Mercury Compounds / Q000737:chemistry* / Q000494:pharmacology; D051379:Mice; D057145:Nanoshells / Q000737:chemistry*; D056951:Photoelectron Spectroscopy; D013054:Spectrophotometry, Atomic; D013696:Temperature
chemical_list: D019187:Cadmium Compounds; D017669:Mercury Compounds; C104191:mercury cadmium telluride