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Porous silicon structures for low-cost diffraction-based biosensing
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10.1063/1.3421545
/content/aip/journal/apl/96/17/10.1063/1.3421545
http://aip.metastore.ingenta.com/content/aip/journal/apl/96/17/10.1063/1.3421545
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(a) Atomic force microscopy (AFM) image of the stamped porous silicon grating. (b) Cross section of the AFM profile of the porous silicon grating revealing a 29 nm grating height.

Image of FIG. 2.
FIG. 2.

(a) Schematic of the PSi-DBB geometry. (b) Picture of the detection apparatus showing visible diffraction from a porous grating with a 60 nm grating height.

Image of FIG. 3.
FIG. 3.

Camera images of diffraction before and after exposing the PSi-DBB to water vapor. Before exposure, the back diffracted beams and are too weak to be observed by the digital camera. After exposure, a large increase in diffraction efficiency is observed.

Image of FIG. 4.
FIG. 4.

Change to diffraction efficiency of the PSi-DBB during exposure to 0.25% solution of 3-APTES for grating of height , period , and air fraction . The responses are fitted with the single exponential function.

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/content/aip/journal/apl/96/17/10.1063/1.3421545
2010-04-28
2014-04-18
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Porous silicon structures for low-cost diffraction-based biosensing
http://aip.metastore.ingenta.com/content/aip/journal/apl/96/17/10.1063/1.3421545
10.1063/1.3421545
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