Advanced Silicon Group

Welcome

NANOTECHNOLOGY FOR THE NEXT GENERATION OF 

SOLAR PV, BIOSENSORS, BATTERIES & BEYOND

Biosensors and beyond

  ASG first applied its technology to solar photovoltaics and it is playing an important role in that industry bringing down costs and improving the efficiency of solar cells, but ASG’s technology has many applications. A few years ago, ASG began working on a novel concept: using its silicon nanowire and semiconductor know-how to create a unique planar silicon biosensor.

Making Silicon Nanowires - ASG’s Process

ASG uses a process called MACE (Metal Assisted Chemical Etching) to produce silicon nanowire structures on the surface of silicon wafers.

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The ASG Biosensor

ASG’s patented biosensor works by combining known approaches to sensitizing silicon to organic biological molecules with photoelectric principles to create a highly sensitive quantitative measurement technique for specific analytes in solution. The device design allows for detection of multiple analytes in the same test: proteins, nucleic acids, and more. 

Nanowires have a high surface area to volume ratio making them sensitive to their environment. This allows the measurement of dilute concentrations - pico-gram/ml detection is possible. 

ASG’s design allows for low cost processing with the potential to reduce the cost of testing for proteins and other biological molecules in solution in many areas of medicine and the life 

sciences.

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SEM Image of Nanowires on Biosensor Surface

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SEM Image of Nanowires on Biosensor Surface

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Sample Biosensor Chips

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Comparison to Other Approaches

Nanowires have been studied for use in the detection and measurement of proteins and other biological molecules, but the approach has not been widely applied. This is primarily because the designs used very expensive complex fabrication techniques and have only a few nanowires (1-5) per device limiting their utility.

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Additional I

ELISA testing is the current standard for many measurements of analytes in solution in the life sciences. ASG’s biosensor offers many advantages over ELISA testing as shown in the table below.

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Simple to Use - Many A

ASG’s biosensor is easy to use – simply drop the solution to be tested on the biosensor’s nanowire surface and measure the current with/without light.

Application areas include biomanufacturing, point-of-care diagnostics, early detection for lung cancer and more.

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