Development of a Portable Petroleum By-Products Chemical Sensor: Phase 1&2 Report

The authors have proposed to tailor design nanoparticle based chemical sensors for the sensitive, selective and field portable analyses of soil samples for petroleum spill indicating hydrocarbons. During the first year of the program they adapted colloidal synthetic chemistry procedures to attach a combination of stabilizing and sensing ligands to the surface of semiconducting quantum dots (QDs). The sensing ligands are designed and utilized to achieve the first level of selective detection of the target hydrocarbons. These tailored QDs have been incorporated into a polymer matrix, which is chosen to achieve a second level of selectivity in the detection of the target hydrocarbons. Testing of these tailored QD films has required the development and integration of a reliable sensor testing station so that ppm to % level hydrocarbon concentrations can be delivered and detected using fluorescence spectroscopy techniques. During the second year of the program the authors continued the optimization of the tailored sensing ligands and likewise performed further studies to select an optimal polymer host for the QDs, thereby achieving an increase in sensitivity to ppb levels while enhancing the degree of selectivity that was achieved in year 1.

Language

  • English

Media Info

  • Media Type: Web
  • Features: Figures; Photos; References; Tables;
  • Pagination: 27p

Subject/Index Terms

Filing Info

  • Accession Number: 01152693
  • Record Type: Publication
  • Contract Numbers: Subcontract 55657-06-15
  • Files: UTC, TRIS, STATEDOT
  • Created Date: Mar 17 2010 1:50PM