ZFIN ID: ZDB-PUB-150507-8
Preparation, cytotoxicity and in vivo bioimaging of highly luminescent water-soluble silicon quantum dots
Fan, J.W., Vankayala, R., Chang, C.L., Chang, C.H., Chiang, C.S., Hwang, K.C.
Date: 2015
Source: Nanotechnology   26: 215703 (Journal)
Registered Authors: Chang, Chia-Hua
Keywords: none
MeSH Terms:
  • Animals
  • Biocompatible Materials/chemistry*
  • Biocompatible Materials/pharmacokinetics
  • Biocompatible Materials/toxicity*
  • Cells, Cultured
  • Contrast Media/chemistry*
  • Contrast Media/pharmacokinetics
  • Contrast Media/toxicity*
  • Luminescent Agents/chemistry
  • Luminescent Agents/pharmacokinetics
  • Luminescent Agents/toxicity
  • Luminescent Measurements
  • Materials Testing
  • Mice, Inbred C57BL
  • Monocytes/drug effects
  • Quantum Dots/chemistry*
  • Quantum Dots/toxicity*
  • Silicon/chemistry
  • Silicon/pharmacokinetics
  • Solubility
  • Water
  • Zebrafish
PubMed: 25943071 Full text @ Nanotechnology
Designing various inorganic nanomaterials that are cost effective, water soluble, optically photostable, highly fluorescent and biocompatible for bioimaging applications is a challenging task. Similar to semiconducting quantum dots (QDs), silicon QDs are another alternative and are highly fluorescent, but non-water soluble. Several surface modification strategies were adopted to make them water soluble. However, the photoluminescence of Si QDs was seriously quenched in the aqueous environment. In this report, highly luminescent, water-dispersible, blue- and green-emitting Si QDs were prepared with good photostability. In vitro studies in monocytes reveal that Si QDs exhibit good biocompatibility and excellent distribution throughout the cytoplasm region, along with the significant fraction translocated into the nucleus. The in vivo zebrafish studies also reveal that Si QDs can be evenly distributed in the yolk-sac region. Overall, our results demonstrate the applicability of water-soluble and highly fluorescent Si QDs as excellent in vitro and in vivo bioimaging probes.