Description:

The chief goal is to develop new selective solid state sensors for carcinogenic and toxic chromium(VI) and arsenic(V) in water based on redox quenching of the luminescence from nanostructured porous silicon and polysiloles.

URLs/Downloads:

2003 Progress Report

Final Progress Report

trogler.html

2002 Progress Report

Record Details:

Record Type:PROJECT( ABSTRACT )

Start Date:01/01/2002

Completion Date:12/31/2004

Record ID: 54415

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Related Organizations:

Role :OWNER

Organization Name :UNIVERSITY OF CALIFORNIA - SAN DIEGO

Mailing Address :9500 Gilman Dr

Citation :La Jolla

State :CA

Zip Code :92093

Project Information:

Approach :Nanostructured porous silicon, as well as polysilole nanowire coatings, will be chemically modified to enhance binding of the chromate and arsenate anions. Chemical modification to vary the redox potential of the polysilole excited state will also be used as a way to impart chemical selectivity. Both sensor approaches will be combined by encapsulating the polysilole in a nanotextured microcavity between two Bragg stacks constructed from porous silicon. Such optical devices have been shown to provide significant detection sensitivity enhancements. The nanoporous material will readily admit small inorganic analytes, such as chromate and arsenate, and exclude biomolecules that might confound the measurements. Sensors based on silicon wafer and polymer technologies are also readily adaptable to fabrication. The fluorescence quenching detection modality is also manufacturable. The essential electronics requires a blue or UV LED as the excitation source and an inexpensive photodiode detector.

Cost :$400,000.00

Research Component :Nanotechnology

Project IDs:

ID Code :R829619

Project type :EPA Grant