Porous silicon structures with high surface area/specific pore s

Details Porous silicon structures with high surface area/specific pore s Porous silicon structures with high surface area/specific pore s

1997-02-27

1999-03-16

Valentine, Donald R.

Chemistry: electrical and wave energy

Apparatus

Electrophoretic or electro-osmotic apparatus

2105021, 210506, 55523, 96 11, G01N 2727, B01D 2400, B01D 5322

Patent

active

058824960

ABSTRACT:
Fabrication and use of porous silicon structures to increase surface area of heated reaction chambers, electrophoresis devices, and thermopneumatic sensor-actuators, chemical preconcentrates, and filtering or control flow devices. In particular, such high surface area or specific pore size porous silicon structures will be useful in significantly augmenting the adsorption, vaporization, desorption, condensation and flow of liquids and gasses in applications that use such processes on a miniature scale. Examples that will benefit from a high surface area, porous silicon structure include sample preconcentrators that are designed to adsorb and subsequently desorb specific chemical species from a sample background; chemical reaction chambers with enhanced surface reaction rates; and sensor-actuator chamber devices with increased pressure for thermopneumatic actuation of integrated membranes. Examples that benefit from specific pore sized porous silicon are chemical/biological filters and thermally-activated flow devices with active or adjacent surfaces such as electrodes or heaters.

REFERENCES:
patent: 4645605 (1987-02-01), Durham
patent: 5004544 (1991-04-01), Hay et al.
patent: 5139624 (1992-08-01), Searson et al.

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