Publications by authors named "Angeles Touceda-Varela"

Article Synopsis
  • The manual grinding of copper(II) chloride, 2,2'-bipyridine, and hydrophobic cadmium selenide quantum dots leads to the creation of a quick and selective fluorescence sensor.
  • This sensor is capable of detecting very small amounts (nanogram levels) of solid cyanide salts that can be seen without special equipment.
  • Additionally, when using a fluorescence detector, it can identify sodium cyanide (NaCN) concentrations as low as 100 parts per million in sand.
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We demonstrate that QDs coated with nitrilotriacetic acid (NTA) bound to Ni (2+) can be used to reversibly and selectively bind, purify, and fluorescently label His 6-tagged (N-terminal) glutathione S-transferase (GST) in one step with retention of enzymatic activity. We find binding to be less effective in the absence of the His 6-tag or Ni (2+) ions.

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The ability of 2,2'-bipyridine-bound copper(ii) ions to quench the photoluminescence of hydrophobic CdSe quantum dots is used to create a novel, selective turn-on fluorescence cyanide sensor.

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