Microfluidic apparatus with integrated porous-substrate/sensor for real-time (BIO) chemical molecule detection
First Claim
1. An apparatus, comprising a microfluidic chip comprising a first substrate member having at least one first microfluidic channel passing through the first substrate member along a first direction;
- a second substrate member having at least one second microfluidic channel, passing through the second substrate member along a second direction;
wherein a portion of the second microfluidic channel passes beneath a portion of the first microfluidic channel to form a crosschannel area; and
at least one porous membrane disposed and sandwiched between the first and second substrate members proximate to the cross-channel area to form a semi-permeable barrier between the first and second microfluidic channels, wherein the at least one porous membrane is disposed in a recess formed in either the first substrate member or the second substrate member and wherein the porous membrane comprises porous nanocrystalline silicon or porous polysilicon, wherein the porous membrane exhibits sensing characteristics causing a change in an optical characteristic of the porous membrane in response to exposure to a targeted fluid or reaction, wherein the porous membrane is integrated into the microfluidic chip.
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Abstract
Microfluidic apparatus including integrated porous substrate/sensors that may be used for detecting targeted biological and chemical molecules and compounds. In one aspect, upper and lower microfluidic channels are defined in respective halves of a substrate, which are sandwiched around a porous membrane upon assembly. In other aspect, the upper and lower channels are formed such that a portion of the lower channel passes beneath a portion of the upper channel to form a cross-channel area, wherein the membrane is disposed between the two channels. In various embodiments, one or more porous membranes are disposed proximate to corresponding cross-channel areas defined by one or more upper and lower channels. The porous membrane may also have sensing characteristics, such that it produces a change in an optical and/or electronic characteristic. Accordingly, the apparatus may further include instrumentation or detection equipment to measure the changes, such as optic-based detectors and electronic instrumentation.
28 Citations
7 Claims
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1. An apparatus, comprising a microfluidic chip comprising a first substrate member having at least one first microfluidic channel passing through the first substrate member along a first direction;
- a second substrate member having at least one second microfluidic channel, passing through the second substrate member along a second direction;
wherein a portion of the second microfluidic channel passes beneath a portion of the first microfluidic channel to form a crosschannel area; and
at least one porous membrane disposed and sandwiched between the first and second substrate members proximate to the cross-channel area to form a semi-permeable barrier between the first and second microfluidic channels, wherein the at least one porous membrane is disposed in a recess formed in either the first substrate member or the second substrate member and wherein the porous membrane comprises porous nanocrystalline silicon or porous polysilicon, wherein the porous membrane exhibits sensing characteristics causing a change in an optical characteristic of the porous membrane in response to exposure to a targeted fluid or reaction, wherein the porous membrane is integrated into the microfluidic chip. - View Dependent Claims (2, 3, 4, 5, 6, 7)
- a second substrate member having at least one second microfluidic channel, passing through the second substrate member along a second direction;
Specification