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Cited by 386

The DOI matches its Crossref record; 18 of the 18 references it cites were found in a registry or an index.

Macroporous p-Type Silicon Fabry−Perot Layers. Fabrication, Characterization, and Applications in Biosensing

Janshoff, Andreas, Dancil, Keiki-Pua S., Steinem, Claudia, Greiner, Douglas P., Lin, Victor S.-Y., Gurtner, Christian, Motesharei, Kianoush, Sailor, Michael J., Ghadiri, M. Reza·1998·Journal of the American Chemical Society
DOI 10.1021/ja9826237
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Abstract

We present in this paper that porous silicon can be used as a large surface area matrix as well as the transducer of biomolecular interactions. We report the fabrication of heavily doped p-type porous silicon with pore diameters that can be tuned, depending on the etching condition, from approximately 5 to 1200 nm. The structure and porosity of the matrixes were characterized by scanning force microscopy (SFM) and scanning electron microscopy (SEM), Brunnauer−Emmett−Teller nitrogen adsorption isotherms, and reflectance interference spectroscopy. The thin porous silicon layers are transparent to the visible region of the reflectance spectra due to their high porosity (80−90%) and are smooth enough to produce Fabry−Perot fringe patterns upon white light illumination. Porous silicon matrixes were modified by ozone oxidation, functionalized in the presence of (2-pyridyldithiopropionamidobutyl)dimethylmethoxysilane, reduced to unmask the sulfhydryl functionalities, and coupled to biotin through a disulfide-bond-forming reaction. Such functionalized matrixes display considerable stability against oxidation and corrosion in aqueous media and were used to evaluate the utility of porous silicon in biosensing. The streptavidin−biotin interactions on the surface of porous silicon could be monitored by the changes in the effective optical thickness calculated from the observed shifts in the Fabry−Perot fringe pattern caused by the change in the refractive index of the medium upon protein−ligand binding. Porous silicon thus combines the properties of a mechanically and chemically stable high surface area matrix with the function of an optical transducer and as such may find utility in the fabrication of biosensor devices.

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Metadata

Authors
Janshoff, A., Dancil, K.-P. S., Steinem, C., Greiner, D. P., Lin, V. S.-Y., Gurtner, C., Motesharei, K., Sailor, M. J., & Ghadiri, M. R.
Venue
Journal of the American Chemical Society
Publisher
American Chemical Society (ACS)
Published
1998-11-01
Volume
120
Issue
46
Pages
12108-12116
ISSN
  • 0002-7863 (ISSN-L)
  • 1520-5126
DOI
10.1021/ja9826237
OpenAlex
W2026988234
Cited by
386
References
18
FWCI
8.18
Type
journal article
Language
en
Open access
closed

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